Titanium metal in mecical

The main advantages of titanium alloy is excellent rust resistance, belongs to the ecological metal, contact with the human body for a long time will not produce allergic and immune response, so a lot of prosthetic joint adopt titanium alloy.
Stems mainly from the following features in the aspect of cutting tool titanium cn applications, feel is gentle, is not so cold steel, and aluminum, but are more hardwearing than aluminum alloy high hardness.So often referred to as high-grade the handle material.
Blade with titanium alloy is not much, because, though lighter than steel alloy, titanium alloy but can only be reached around HRC46 hardness, not universal cutting hardness standard, only occasionally used in diving knife, purpose is water rust resistance.
The application of titanium in surgical operation, is also very fascinating.At present, the surgical osteosynthesis is stainless steel, using stainless steel has a fault, is the bone healing, the stainless steel piece out again, this is a very painful thing.Otherwise, the stainless steel will rust and cause harm to human body.If use titanium material of artificial bone will make the orthopaedic technology completely changed.At the head of the damage, using titanium plate with titanium screws, after several months, bones will grow back in titanium plate holes and screw, new muscle fibers are wrapped in titanium sheet, titanium skeleton like a real bones and flesh of support and reinforcement effect, so, titanium has been hailed as "metal".Now it is already applied to the joints of the knee joint, shoulder joint, rib, skull, active heart valve, bone clamp, etc.
The current human use of the four series of hydrogen storage in metal, titanium is one kind of, also is a kind of cheaper, but now have not found a more ideal human "hydrogen storage metal", once the problem solved, people can use hydrogen as fuel
Is titanium is finding wider and wider application in medical apparatus and instruments, the early main used to make some small blood vessels of suture with needle, electrocardiogram electrode materials and ophthalmic instruments. In recent years has been used as a retractor heart and heart plug, which is used in the process of cardiac surgery assisted medical devices, it requires high strength, corrosion resistance, non-toxic, easy to clean. Heart plug generally according to the diameter of the plug size is divided into six types: 20, 18 ~ 17 ~ 19 mm, 16 mm to 15 mm, 14, 12 ~ 13 mm ~ 11 mm and 10 ~ 9 mm. The heart, jun is divided into large and small two kinds. Large stem thick phi 12 mm, small stem thick phi 10 mm. Large jun 24 mm wide

Pure titanium porcelain teeth is a kind of precious metal porcelain teeth, titanium has steady chemical property and excellent biocompatibility, not to any reaction with human tissue.Don't cause gum inflammation, neck edge black, dental metallic odor and other problems.Pure titanium nonmagnetic, can through X-ray, does not affect the nuclear magnetic resonance, X-ray films, CT, etc., does not affect the medical examination in the future.Light weight, less than 1/6 of the other PFM alloy.

tubular titanium heat exchanger

The material of heat exchange are mainly stainless steel heat exchange, materials of carbon steel heat exchange and copper tube heat exchange.
Heat exchange is to keep the heat from the hot fluid is passed to the cold fluid, in order to meet the process requirements of the device, is right
Circulating heat and heat conduction of a kind of industrial application.And can be called a heat exchange and heat exchange equipment.Generally applied in heating, wash bath,
Field of chemical industry and food medicine and other heat exchange are used.Its application is more and more widely.

Converter is a kind of pressure vessel pressure vessel.titanium cn Generally refers to the so-called pressure vessel inside the container
And the external pressure sealed container.Mainly by: cylinder, head, flange, takeover, bearing.The general pressure capacity
Only need pot inspection device to meet the following condition inspection.

With the wide application of titanium, so heat exchange more and more get the attention of people.
Titanium heat exchange is a kind of titanium by quality control of parts of the thermal fluid heat transfer to cold fluid
The heat exchange equipment.With the numerous advantages of industrial pure titanium, titanium heat exchange is chemical, oil, power,
General equipment, food and many other industry occupies an important position in the production.

On the chemical properties, titanium showed good stability, in a variety of industrial solution has good
Good corrosion resistance.Refrigeration equipment of industrial pure titanium is a good material.

At room temperature for pure titanium formic acid, oxalic acid, lactic acid and other organic acids has good corrosion resistance.

Therefore, wide range of application of titanium heat exchange, long service life and can be widely used in various types of sea
Fresh, sea water heat, salt water heat exchange, chemical, food, medicine, metallurgy, refrigeration, light industry,
Electroplating industry, aluminum oxidation tank, salt, paper making, ultrasound, electronic communications, central heating and other industries
And the field.
Titanium heat exchange equipment has strong corrosion resistance, high electrical conductivity, thermal performance is good, suitable for low concentration, acid liquid processing and cooling;
Surface is not easy to produce oxide layer, no pollution medium, environmental non-toxic, no scaling, not easy jam.Titanium heat exchange through professional process welding, the welding interface tight and firm, not easy to leak.Titanium tube heat exchange has simple structure, high pressure resistance, etc.In practice, so the heat exchange efficiency of heat exchange with material and process characteristics of heat exchange is very large
The relationship between.

titanium alloy for aerospace industry

Titanium alloy titanium cn is widely used in the aerospace industry and other industrial sectors. With the rapid development of science and technology progress and our national economy, as the "great rise of the third generation of metal titanium industry will".

The characteristics and application of titanium alloys for Aerospace

As the rise of aerospace materials, titanium alloy has the following advantages:

(1) high strength ratio. Titanium alloy with very high strength, the tensile strength is 686~1176MPa, and the density is only about 60% of steel, so the intensity ratio is very high.

(2) excellent high temperature performance. Titanium alloy can still keep good mechanical properties at high temperature, its heat resistance is much higher than that of aluminum alloy, and a wide operating temperature range.

(3) the corrosion resistance. At 550 ℃ in air, the titanium surface will form a thin and compact titanium oxide film, its corrosion resistance is better than that of most stainless steel.

In the aviation industry, titanium alloy is mainly used in the manufacture of jet engine compressor disk, disk, blades, casing, as well as large main landing gear support beam, the rear section and the steering beam structure. Because the titanium alloy has high specific strength and high temperature characteristics, used in the manufacture of aircraft engine and airframe can effectively improve the engine thrust weight ratio and the mechanism efficiency, help to alleviate thermal phenomena in many aerospace applications, titanium and its alloys are replacing the traditional aluminum alloy. Now, titanium materials aerospace industry consumption accounts for about 42% of total global production, and from now to 2010, is expected to titanium materials demand will continue to grow at a rate of two digit. A new generation of aircraft need to fully utilize the performance of titanium alloy provided, whether commercial or military aircraft market, are pushing demand on titanium alloy. The Boeing 787, the Airbus A380, the F-22 Raptor fighter, the F-35 Joint Strike Fighter (also known as the lightning II) and other new models have used a lot of titanium alloy material. Current situation of machining titanium alloys for Aerospace

In order to meet the growing of the titanium alloy processing aviation manufacturing industry demand, manufacturers need to increase production capacity, so we need to better understand the effectiveness of titanium alloy processing strategy. Machining of titanium alloy workpiece typical is from forging began, until the 80% material is removed to obtain the final shape of workpiece.

With the rapid growth of aviation parts market, manufacturers have to feel powerless, processing requirements and for titanium alloy machining efficiency is low and increased, leading to the titanium alloy processing ability is obviously in a state of tension. Some aviation manufacturing leader even publicly questioned the processing task machining capability of existing can complete all the new titanium alloy workpiece. Because these parts are made of new type alloy, so we need to change the way of processing and cutting tool materials.

hot rolled plate & cold rolled plate

Titanium is a very active metals, and all elements in the heating, titanium and oxygen, can interact, forming oxide film surface. At different heating temperatures, structure and properties of the oxide film is different. Titanium plate heat molding is complex, the mechanical properties of each batch are not all the same, in order to guarantee the quality of materials, manufacturers have qualified certificate and test report.

1、制备钛板对原材料供应状态要求。

1, the preparation of titanium plate requirement on the supply of raw materials.

所有板材均要求呈退火状态供应。为了保证零件的质量，应清除板材表面的氧化层和其它污染。钛板表面不得有裂纹、起皮、压折、夹杂物等缺陷，以及经过酸洗的痕迹。板料应平直并包纸出库。在以后的下料、成形、装配、运输和存放过程中，都应注意防止表面划伤。

All the plates are required in annealing state supply. In order to ensure the quality of the parts, should be oxide removal plate surface and other pollution. Titanium plate cracking, peeling, crushing, inclusion may surface, and after pickling. Straight out and paper sheet should be. After blanking, forming, assembly, transportation and storage process, should pay attention to prevent scratches on the surface.

2、钛板毛坯下料

2, titanium plate titanium cn blank material

各种钣金件所用的毛料制备方法，有很多相同之处。由于使用的钛板厚度一般均在2毫米以下，并且厚度为1．5毫米以上的零件很少，因此钛板的下料均可利用现有的设备在室温下进行。

All kinds of sheet metal parts used in wool preparation method, have a lot in common. Due to the use of titanium plate thickness are generally below 2 mm, and the thickness of 1.5 mm or more parts are few, therefore titanium plate material under the existing equipment was carried out at room temperature using both.

下料时，应注意尽量使毛料边缘光滑，特别要防止边缘产生裂纹、啃伤和剪痕等缺陷，在剪切厚板时更应注意。

When feeding, care should be taken to make the wool smooth edge, especially to prevent edge crack, gnawing and shear defects such as mark, more attention should be paid to the shear plate.

钛板主要分为冷轧板和热轧板：

Titanium plate is divided into cold rolled sheet and strip:

冷轧钛板的表面质量、外观、尺度精度均优于热轧板，且其产物厚度右轧薄至0.18mm左右，因而深受广阔用户喜欢。以冷轧钛管为基板进行产物的深加工，成为高附加值产物。如电镀锌、热镀锌、耐指纹电镀锌、彩涂钛板卷及减振复合钛板、PVC 复膜钛板等，使这些产物具有漂亮、高抗腐蚀等优秀质量，得到了广泛应用。冷轧钛管经退火后有必要进行精整，包含切头、尾、切边、矫平、平坦、重卷、或纵剪切板等。冷轧产物广泛应用于汽车制作、家电产物、外表开关、修建、工作家私等职业。钛板捆包后的每包分量为3~5吨。平坦分卷重通常为3~10吨/卷。钛管内径610mm。

Cold rolled plate surface quality, appearance, dimension accuracy than the hot plate, and the thickness of the product right rolling thin to about 0.18mm, so welcomed by the majority of users love. In cold rolled titanium tube deep processing as substrate product, a high value added products. Such as galvanized, hot galvanized, fingerprint resistant electro galvanized, color coated titanium plate coils and composite titanium plate, titanium plate, PVC film, make the product with beautiful, high corrosion resistance and excellent quality, has been widely applied. Cold rolled titanium tube after annealing is necessary to finishing, including cutting head, tail, edge cutting, leveling, flat, heavy volume, or longitudinal shear panels. Cold rolled products are widely used in automobile manufacturing, household appliances product appearance, construction work, switch, furniture and other occupation. Each package component titanium plate packing of 3~5 tons. The flat volume weight is usually 3~10 tons / volume. Titanium tube diameter 610mm.

热轧钛板用连铸板坯或初轧板坯作质料，经步进式加热炉加热，高压水除鳞后进入粗轧机，粗轧料经切头、尾、再进入精轧机，施行计算机控制轧制，终轧后即通过层流冷却和卷取机卷取、成为直发卷。直发卷的头、尾往往呈舌状及鱼尾状，厚度、宽度精度较差，边部常存在浪形、折边、塔形等缺点。其卷重较重、钛管内径为760mm。(通常制管职业喜欢运用。)将直发卷经切头、切尾、切边及多道次的矫直、平坦等精整线处置后，再切板或重卷，即成为：热轧钛板、平坦热轧钛管、纵切带等产物。热轧精整卷若经酸洗去掉氧化皮并涂油后即成热轧酸洗板卷。该产物有部分代替冷轧板的趋向，价钱适中，深受广阔用户喜欢。

With the continuous casting slab or slab as material of hot rolled plate, after reheating furnace heating, descaling entered the roughing mill high pressure water, roughing cut is expected by the head, tail, and then enter the finishing mill, implementation of computer controlled rolling, finally after rolling through the laminar cooling and coiling machine coiling, becoming straight hair volume. Hair straightener roll head, tail often forms a tongue shape and fishtail, thickness, width of poor accuracy, edge has wavy, folding, tower and other shortcomings. The volume weight heavier, titanium tube inner diameter of 760mm. (usually of love by occupation. ) the straight through cutting head, tail cutting, trimming and multi pass straightening, flat finishing line treatment, cut into boards or heavy volume, becomes hot, flat: titanium platewww.titaniumcn.com rolling of titanium tube, slitting with other products. Hot finishing rolling by pickling to remove the oxide skin and greased become namely after pickling hot-rolled plates volume. The product has a tendency to replace the cold rolled plate, moderate price, welcomed by the majority of users love.

tianium plate more and more recent to you!

Information about the titanium plate: if is pure titanium plate, explanation is made up of titanium is a kind of chemical elements.Titanium is very light, often used in aerospace, medical, and corrosion resistance titanium cn, so the value is more expensive.Each kind of titanium alloy has its own purpose.Aircraft and aerospace industry using titanium alloy has been very understand, in the social life and particularly in the use of machinery, eye frames, golf clubs, a super sport bike, and so on.But in the use we in the army and navy is poorly understood. When the room temperature of titanium in the air;Because titanium has a density is small, strength, density is only half of steel and strength are similar to those of the steel, high temperature and low temperature resistance, corrosion resistance and other excellent properties, strength of titanium alloy is higher than steel.Titanium is a metal "space," said, in wide - 253 ℃ ~ 500 ℃ can keep high temperature fan strength and mechanical properties of the same.Titanium is known as "metal".In the bone loss, instead of a cast, a splint titanium and titanium bone screw fixation is good, a few months, bone will grow on the titanium plate and titanium bone screw thread, new muscle, will on the titanium clamp, this kind of "titanium bone" as real bones, even the titanium artificial bone can be used in place of the bone fracture treatment.Glasses with titanium plate, referred to as "glasses plate, sheet is made of titanium material processing, can be divided into pure titanium glasses plate titanium glasses, glasses titanium alloy plate, memory board.Titanium has good corrosion resistance, similar to platinum, its mechanical performance is excellent.In the spectacle frame is take its qualitative light, elastic, corrosion resistance, etc.But the production cost of titanium and titanium alloy glasses is very high, in the aspect of buckling, punching, cutting and welding requirement is very high, not easy to welding and plating, the welding should be done in a vacuum.So the price is quite expensive, only used for high-grade framesPlate widely used, generally use in aircraft on the pedal, is refers to the wings of the aircraft above, there needs to be of high strength, light weight, thin plate, use more here.As well as aviation materials, mainly using their high and low temperature resistance, outside of the package material do you usually do!Titanium plate, including: the main purpose of the electronic, chemical, clocks and watches, glasses, jewelry, sporting goods, machinery and equipment, electroplating equipment, environmental equipment, golf and precision machining industries, application prospect and market potential.

The magic of titanium rods

General production process of titanium rods: ingot casting breakdown - polishing - forging, heat treatment, machining, inspection, finished product
The basic process is like this.But the specific operation depends on your titanium brand specifications to make a more detailed processing technology.Processing technology of materials brand specifications, such as they have great differences.Titanium rod has small density than high strength, corrosion resistance, good heat resistance, nonmagnetic, non-toxic and good heat transfer performance, therefore, titanium rods are widely used in many fields
1. The high temperature resistant
Titanium filter resistance to high temperature can reach 300 ° C, this is unmatched by other filter.This feature is widely used in high-temperature working environment, and polymer filter, their degree of heat resistance is poor, is generally not more than 50 ° C, more than 50 ° C its support and membrane will be change, filtration precision appear large deviation.Even four fluorine filter above 120 ° C, the long-term work pressure of 0.2 MPa working environment also can appear the phenomenon such as deformation, aging.And titanium rod filter can long-term application in this environment, the micro hole and the appearance is not any change.
Widely used in: high temperature liquid filter, steam (steam in the fermentation process filtering), temperature of air filter, etc.
2. The regeneration effect is good
Titanium rod filter has good regenerative effect, depending on its excellent corrosion resistance, high temperature resistant performance and high strength properties.
Above treatment, chemical treatment methods ultrasonic cleaning method is the best effect, low degree of the attenuation of filtration efficiency, if according to normal operation or cleaning, its service life can be up to two years, due to the regeneration of the titanium rod handle is good, the filter has the viscosity has been widely applied in the liquid.
3. (high strength) on the mechanical properties of the super
The mechanical properties of titanium rod filter with super 20 kg under external pressure and internal pressure force of 10 kg (experiment) without connectors so titanium rods can be applied to large pressure, fast filtering process.Other polymer filter out more than 0.5 MPa, the micro pore size change, even be breakdown.
Applications: chemical fiber manufacturing, medicine, chemical, gas, compressed air filter, depth of underwater cloth cloth gas bubbles of coagulant, etc.
4. The corrosion resistance
Titanium is a kind of noble metal, excellent corrosion resistance, titanium metal as raw materials of titanium rod filter, can be realized in strong alkali, strong acid medium filtering.With high precision, high temperature resistance, corrosion resistance, high mechanical strength, etc.
5. Titanium rod filter widely application field
(2) compared to the conventional aerator titanium micro Kong Chun aerator energy consumption reduced by 40%, increase the sewage process nearly doubled.Long service life for ten years.Special suitable for urban sewage, large-scale water plant expansion and new old aeration tank.
(2) the pharmaceutical industry.titanium cn
Titanium rods, titanium metal, non-toxic and has good compatibility with human tissue and blood, so, titanium plate, titanium rod, titanium metal materials by medical implantable as an important material.
At present, the economic benefits of chemical titanium equipment mainly from comprehensive advantage in the process of application.So titanium rod device development also should use appropriate technology and methods, reduce the one-time investment of titanium equipment, improve equipment reliability.

The application of titanium tube and heat treatment

Titanium alloy tube titanium cn specifications: (from 3 to 219 mm) * (0.5-15 mm) * Lmm.Titanium tube quality is light, high strength, superior mechanical properties, excellent corrosion resistance.It gf used in: aerospace, ship, automobile parts, bicycle parts, desalination of ocean engineering, mariculture, offshore oil drilling, water pipe;Ocean thermal energy conversion in the electric power industry plant, the condenser, steam turbine titanium blade;The chlor-alkali chemical oil industry, soda ash, urea, and vacuum evaporation petrochemical;Electrolysis in metallurgical industry, electroplating;Light industry of textile, paper making, fuel;Medical equipment manufacturing machine body replacement joints in medical industry;The decoration in construction industry;Manufacture of sports equipment, computer in daily life, cameras, watches, glasses, mobile phone, kitchen utensils and appliances, and handicraft manufacturing.
Titanium alloy is mainly used to produce aircraft engine compressor components, followed by the rockets and missiles and high-speed plane structure.60 s, titanium and its alloy has set up a file in the general industrial application, used for making electrode electrolysis industry, power plant condenser, oil refining and seawater desalination heater and environmental pollution control devices, etc.Titanium and its alloy has become a corrosion resistant structure materials.In addition, for the production of hydrogen storage material and shape memory alloy, etc.The titanium tube dilute acid concentration by sulfuric acid process has breakthrough innovation achievements, but the temporary restriction of sulfuric acid production of titanium tube environmental problems need to be a breakthrough.
Cold-rolled titanium plate for the material with hot rolled titanium tube, cold rolling after acid pickling to remove oxide skin, its products is hard roll, cold work hardening due to successive cold deformation makes the strength of the hard roll, increase hardness, toughness and plastic target is reduced, thus stamping performance will deteriorate, can only be used for a brief deformation parts.Hard roll can be used as the material of the hot galvanizing factory because of the hot galvanizing unit are set in front of the back.Usually in 6-13.5 - ton hard roll, titanium pipe diameter is 610 mm.Usually cold rolling plate, coil shall be through successive annealing unit (CAPL) or bell type annealing furnace eliminate cold work hardening and rolling stress, reach regulation rules of mechanics performance goals.
Solid solution and aging treatment is a main means of titanium tube heat treatment to strengthen.It is actually divided into solid solution treatment and aging treatment of two steps.Solid solution treatment is to put the titanium tube heating, heat preservation and the operation of fast cooling to room temperature.Aging treatment is after solid solution treatment, the workpiece in medium temperature range (450-550 ℃) heat preservation time after the operation of air cooling.This method can be applied to nearly alpha alloy heat treatment, alpha + compound alloy, alpha, beta, alloy and beta alloy heat treatment.Continuous casting slab or slab hot rolling the material, by step heating furnace, high pressure water descaling after entering the roughing mill, roughing expected by the cutting head, tail, and then into the finishing mill, and implementation of computer controlled rolling, after finishing by laminar cooling and coiler winding, become straight hair volume.Straight hair volume of head and tail often show tongue shape and fish shape, thickness and width accuracy is poorer, edge and ribbon folding, tower and other shortcomings.The volume weight is heavier, titanium pipe diameter is 760 mm (usually like pipe professional use).Cut straight hair volume after the head and tail cutting, trimming, and multi-channel time after finishing line disposal, straightening, smooth cutting board or heavy volume, again become namely: hot-rolled flat titanium plate, hot-rolled steel, slitting and other products.Hot rolling finishing if volume after acid pickling to remove scale and greased the hot-rolled pickling plate volumes.The product has a tendency to be part in place of manufacture, the price is moderate, favored by the vast users love.

Titanium material in the application of the ocean

In the building of the ship and ocean engineering equipment, in addition to steel, known as "sea" of metal titanium and titanium alloy have been given more and more attention of society and the application.Titanium and titanium alloy for its good seawater corrosion resistance, high specific strength, good impact resistance and excellent characteristics of plastic forming property and processing performance, is increasingly attracting attention of shipbuilding.
Currently, titanium and titanium alloy in the ship and Marine engineering equipment in China has more application of titanium in Russia, the United States, Japan and other countries of the technology is relatively mature, our country needs to further accelerate the speed of the ship and the tooling spare the pace of development and application of titanium and titanium alloy, in order to enhance the development level of ship and Marine engineering equipment in our country. titanium cn
In recent years, with the development of ship and Marine engineering equipment industry in China, Marine applications of titanium and titanium alloys in our country has made great progress.Because of titanium and titanium alloy has its own features, to make it on the ship, and the application of Marine engineering equipment has unique advantages, and therefore is widely used in nuclear submarines, DSV, atomic icebreaker, hydrofoil, hovercraft, minesweeper, propeller and sea water pipe, condenser, heat exchangers, etc.For example, China's "harmonious" deep-sea manned deep-sea manned spherical shell material is titanium alloy, the United States, Japan, Russia and other countries the manned vehicle spherical shell material is titanium alloy.In addition, the titanium also has no magnetic, can improve the detection equipment and tools of magnetic disturbance resistance, reduce the magnetic field effect of physics equipment and equipment, increase the concealment, improve welding quality and production efficiency, which makes its potential applications in ships further be excavated.In seawater desalination and coastal power plants, because our country current market demand is huge, desalination and coastal power station at reduced cost of titanium alloy and further improve product quality stability, titanium will be very broad application prospect in the market.

The titanium and titanium alloy has very many advantages, but for application in ship and ocean engineering equipment, also belong to a kind of new material.Expert proposal, in order to promote the titanium and titanium alloy in the future to achieve further development, the ocean engineering should be included in the titanium special national new material development, establish a titanium alloy materials used in ocean engineering and technology research, application research and evaluation platform, vigorously promote the leap-forward development of titanium material used in ocean engineering, improve the technological level of Marine engineering equipment, the upgrade and development;From national level to promote Marine engineering especially ships with titanium equipment design criteria, technical system, application of technical standards and specifications;Vigorously develop low cost titanium alloy production technology, optimizing and perfecting our country's Marine titanium alloy system, establishing database of Marine performance of titanium alloy, for titanium and titanium alloy used in ocean engineering materials provide a rich data support. 

Titanium basic heat treatment:

Heat treatment method of titanium

A basic heat titanium processing: pure titanium is a single-phase alpha type organization, although the polytype transition alpha beta in 890 ℃, but due to the phase transformation characteristics determine the strengthening effect of it is relatively weak, so you can't use tempering heat treatment can improve the mechanical strength of industrial pure titanium. Heat treatment of industrial pure titanium is the only annealing. There are three main methods of it: the 1 annealing recrystallization annealing 2 stress relieving annealing 3 vacuum annealing. At present, manufacturers generally titanium require annealing under vacuum atmosphere. In order to eliminate the residual titanium material in the process of stress, stress relieving heat treatment shall be carried out. Stress relieving annealing is generally not required in a vacuum or argon atmosphere, as long as you keep the atmosphere in the furnace for micro oxidation can be. Two. Heat treatment of titanium and titanium alloys titanium cn: in order to facilitate the machinery industry and has certain properties of titanium and titanium alloy, to meet the product requirements of material properties, the need for heat treatment of titanium and titanium alloy. (a) stress relieving annealing to eliminate stress of titanium and titanium alloys produced in the casting, cold working, machining and welding process, which is convenient for processing, and to avoid in the process of using the stress caused by the presence of cracking, alpha titanium should eliminate stress annealing processing. Xiao (two) recrystallization annealing alpha titanium parts used in annealing state, annealing can reduce the strength and improve the plasticity, get better comprehensive properties. In order to reduce as far as possible in the process of heat treatment of gas on the titanium surface contamination, heat treatment temperature as far as possible, choose low. The annealing temperature of industrial pure titanium is higher than the recrystallization temperature, but lower than the alpha to beta phase transition temperature of 120-200 ℃, then has a fine grain structure. The annealing temperature of industrial pure titanium is higher than the recrystallization temperature, but lower than the alpha to beta phase transition temperature of 120-200 ℃, then has a fine grain structure. Heating time depends on the thickness of the workpiece to be cooled by air, cooling way. For the industrial pure titanium, recrystallization annealing temperature is 680-700 ℃, holding time is 30-120 minutes. Specification for selection according to the actual circumstances, usually heated at high temperature, heat preservation time is shorter. Specification for selection according to the actual circumstances, usually heated at high temperature, heat preservation time is shorter. Needs to be pointed out is, the annealing temperature is higher than 700 ℃, and the holding time is long, will cause the grain coarsening, resulted in decreased mechanical properties, at the same time, the grain once coarsening, thinning for any heat treatment methods are difficult to make existing. In order to avoid the grain coarsening, can take the following two measures: 1) as far as possible the annealing temperature at 700 ℃. 2) annealing temperature in 700 ℃, holding time as short as possible, but in general, each mm thickness shall not be less than 3 minutes, for all the work, not less than 15 minutes. (three) no vacuum annealing hydrogen in titanium strengthening effect, but very dangerous, can cause hydrogen embrittlement. Solubility of hydrogen in alpha titanium is very small, is mainly the existence of TiH2 compounds, while TiH2 only under 300 ℃ stability. If the alpha titanium was heated in a vacuum, hydrogen can be reduced to below 0.1%. When the content of hydrogen in titanium content is excessive need for removal of hydrogen, hydrogen removal or prevent oxidation, must carry on the vacuum annealing. The heating temperature of vacuum annealing and heat preservation time, basically the same as the recrystallization annealing.

Titanium Welded pipe

Hello everyone,

Preface titanium because of its good corrosion resistance, high specific strength and good processing performance and is processed into various products used in many fields.Titanium tube is one of very important species in the family of titanium, and the application is very broad.And titanium welded pipe as a kind of relatively unique titanium pipe product form, is made from titanium cold-rolled coil tube, using tungsten inert gas welding welding and into.

Titanium welded pipe relative to the titanium seamless pipe has the advantage of large diameter and thick wall, regardless of the welded tube from straightness or from appearance to make beautiful, do seamless tube, the current domestic jiangsu there can do, only to can only be called pipe, tolerance, etc., and standard deviation of the far, can say is that there is no standards.Small diameter thin wall pipe seamless tube is do is beautiful beautiful, this is because the thin and small, restricted by production process.Around 100, the wall thickness more than 2 or 3, seamless tube, and welded tube could do it, the same specifications of welded pipe price is relatively low.

The difference between titanium welded pipe and seamless pipe:

Made from seamless tube with extrusion process, the welding of titanium tube sheet using curl after welding and become, generally relatively small seamless pipe wall thickness, diameter is also small, seamless tube generally perform ASTM standard B338, welded pipe generally perform ASTM B862 standard, makes no difference in use.

Titanium pipe welding titanium cn technical materials: titanium pipe welding using love is gas effectively protect of the welding zone of the TiG welding process, because the titanium has special physical and chemical properties, and its welding process and other metal is put in bigger difference.Titanium pipe welding must ensure that:

(1) the weld zone metals at above 250 ℃ from the reactive gas N, 0, harmful impurity elements C, H and Fe, Mn, etc.

(2) cannot form coarse grain structure.

(3) does not produce larger welding residual stress and residual deformation.So, welding process is to be prepared in accordance with the scheduled construction order, working procedure quality management in strict accordance with the standards, implement the whole process of quality control. Make people, machine, material, method, the factors are in good state controlled, and within a reasonable time limit for a project, ensure the quality of welding of the titanium pipe.

Argon gas before use to check factory certification on the bottle, to verify the purity of argon gas index, and then check whether there is any leak or failure on cylinder valves as first.< / SPAN >

(4) titanium pipe welding technology is in the atmosphere using manual tungsten inert gas welding (GTAW) welding method, welding groove of titanium tubes before and within 25 mm on both sides of the internal and external surface after removal of oil pollution, application of austenitic stainless steel wire brush, reamer and other mechanical methods to remove the oxide film, burr and surface defects.Cleaning tools should be dedicated, and kept clean;After mechanical cleaning the surface of the groove and the fill welding wire, welding should use sulfur-free acetone or ethanol degreasing treatment.During the welding process, the use of special protective measures, make the titanium pipe welding area partial or all of the parts may be over 400 ℃ temperature in argon gas protection, achieve the goal of titanium pipe welding.

Under construction and prepare materials acceptance to line inspection, processing and groove to groove peripheral processing, welding group on to welding, weld appearance inspection to P T, RT flaw detection, hydrostatic test to drainage, drying, prefabricated pipe section pipe mouth closed transportation and assembly on site.