Superplastic forming method of TC4 titanium alloy and titanium alloy plate

Titanium alloy has excellent corrosion resistance, low density, good fatigue strength and resistance to crack growth. TC4 titanium alloy is currently mainly made of titanium plates and titanium rods. The main reason for the current situation is that TC4 titanium alloy has high strength and cold Roll forming is difficult. Titanium alloy's excellent corrosion resistance and good specific strength have broad application prospects in aviation, aerospace, automobile, shipbuilding, energy and other industries.
The superplastic forming method of titanium alloy sheet can be roughly divided into the following three types: (1) vacuum forming; (2) air pressure forming (blow forming); (3) compression forming (coupling die forming). The first two methods are commonly used methods for forming plastic (or glass) products. The superplastic forming of titanium plate is viscous or semi-viscous flow deformation, so low pressure forming can be used. Air pressure forming can also be combined with vacuum forming. Titanium Metal
1. Vacuum forming method
The vacuum forming method can be divided into two types: the convex mold method and the concave mold method.
The punch method is a forming method in which the heated wool is adsorbed on a punch with the inner shape of the part, and is used to form parts that require high inner dimensional accuracy. The die method is a forming force method in which heated wool is adsorbed on a die with the shape of the part. It is used for the forming of parts that require high dimensional accuracy. Generally speaking, the former is used for forming deeper containers, and the latter is used for forming shallower containers.  T40 Titanium Bar
Vacuum forming is also a kind of air pressure forming, but the forming pressure can only be one atmosphere. Therefore, for the titanium plate, only parts with thin thickness, simple shape, and gentle curvature can be formed, and it is not suitable for forming parts with thicker thickness, more complicated shape and severe deformation. titanium forged block
2. Compression molding method
Using coupling mold. The difference from ordinary pressing is that the temperature is high and the molding speed is much slower.
Because it is difficult to manufacture metal coupling molds that can withstand the superplastic temperature of titanium plates, and the matching accuracy is difficult to ensure (especially for molds with complex shapes), superplastic forming of titanium plates is rarely used.
3. Air pressure forming method (blow molding method)
This is a special bulging process.
The traditional bulging process is realized by mechanical, hydraulic bulging or explosive bulging. The pressure and energy used are relatively high, and due to the limitation of material plasticity, the amount of deformation is generally not too large. Blow molding is a kind of forming that can obtain large deformation with low energy and low pressure. It is a sheet metal forming technology that is different from the traditional process concept. Since the metal is free in the deformation process, almost all the power is consumed in the deformation work, and the friction loss is small (for free blow molding, there is no friction loss), which is essentially different from other stamping forming . titanium rectangular rod
Blow molding can be divided into free blow molding and mold blow molding. Mold blow molding is characterized by half-mold molding. Similar to vacuum molding, it is also divided into two types: convex molding and concave molding; the difference is that the molding pressure can be greater than one atmosphere, and it is also suitable for air supply system. The pressure can be adjusted so that parts with complex shapes and large curvature changes can be manufactured.
(1) Free blow molding method
This is the simplest form of blow molding. Its characteristic is that there is no mold, and the typical parts blown are spherical parts.
(2) Punch forming method
This method is to form a closed pressure space on the outside of the titanium plate wool. After the titanium plate is heated to superplastic temperature, under the action of the compressed gas pressure, the wool produces superplastic deformation and gradually approaches the mold surface until it is the same as the mold. Completely fit, make the same parts as the mold surface. The inner surface of the formed part has high dimensional accuracy, accurate shape, large depth and width ratio, and easy mold processing, but it is difficult to demold and raw materials are more expensive. The bottom of the part formed by this method is thicker than the surrounding.
(3) Concave mold forming method
Different from the punch forming method, a closed pressure space is formed inside the titanium sheet wool during the forming process. The outer surface of the formed part has high dimensional accuracy, accurate shape, easy part demolding, less raw materials, but the depth and width are relatively small, and the mold processing is also difficult. The bottom of the part formed by this method is thinner than the surrounding.

What are the applications of titanium wire and titanium alloy wire?

Titanium and titanium alloy materials, as the best among metal materials, have a series of excellent properties that other metal materials can't match. Therefore, they have developed rapidly in recent years and have been rapidly and widely used in high-tech fields such as aerospace and military industry. The United States, Russia, Japan, China and other countries all over the world attach great importance to the research and development of titanium alloys, continue to develop new types of titanium alloy materials, and expand the application of titanium and titanium alloys. Due to continuous in-depth research and an increase in product series, many titanium products, such as titanium alloy wires, have also increasingly entered the fields of various civilian consumer products.
1. Classification of titanium wire
Titanium can be divided into pure titanium and ASTM B265 TA6V Titanium Plate on whether it contains alloying elements, and Titanium Threaded Forged Fitting can be divided into α titanium alloy and near α type alloy, (α + β) type alloy, and near β type according to its composition and room temperature structure. Alloy and β-type alloy. Titanium and titanium alloys can be used to prepare wires with different usage requirements according to different properties. Finished titanium and titanium alloy wires are generally in the hard state (Y) and annealed state (M).
2. Application of titanium wire
Titanium and titanium alloys have good corrosion resistance, high specific strength, non-magnetic, high biocompatibility, low impedance to ultrasonic waves, high sound transmission coefficient, hydrogen storage and better shape memory functions. The excellent characteristics of important use value have produced important applications in many fields such as aerospace, petrochemical, medical and health, automobiles, construction, and sports and leisure products.
Titanium and Gr2 Polished Titanium Wire, as an important variety of titanium material series, has made great progress in terms of output, specifications and applications. Generally speaking, titanium and titanium alloy wires refer to titanium products supplied in the form of discs, and some are supplied in the form of straight wires. As far as the diameter is concerned, the division of rods and wires is not strict and varies among countries. And in recent years, due to its continuous development, the variety is becoming more and more, which provides more options for its application in high-performance industrial supplies and consumer products.

Analysis of temperature reduction of the plate heat exchanger?

Before the supersaturated sodium aluminate liquid enters the seeding tank for decomposition, the liquid needs to be cooled in the production of alumina. The temperature of the slurry that enters the seeding tank after mixing with the refined seed meets the requirements of the decomposition process (5663℃). Aluminum hydroxide with high decomposition rate, coarse particle size and good quality. A factory uses Bayer's method to produce alumina. The original design of the sodium aluminate liquid cooling process is a plate heat exchanger and vacuum cooling in series. Later, the floating liquid in the mother liquid of the vertical plate was recovered, and the plate heat exchanger was changed and transformed to form a liquid cooling process in which the plate heat exchanger is connected in series and then connected in series with the vacuum cooling. At the same time, the temperature of the mother liquid of the riser as a cold phase for heat exchange has been greatly increased, and good conditions have been invented for reducing the steam consumption in the evaporation process. High Quality Titanium Wire
Stacked at intervals. The edges between the plates are sealed with gaskets, and the plate heat exchanger is made of thin metal plates that are corrugated while forming a narrow flow channel. The cold and hot fluids flow on both sides of the plate, and exchange heat through the metal plates. The four corners of the plate are provided with flow channel holes, which constitute a fluid distribution pipe and a collecting pipe. The two ends of the whole equipment are tightly sealed with movable end caps and fixed end caps. The gap between the plates is 26mm. astm b348 titanium bar
The main advantage of the plate heat exchanger is that when the fluid flows on the corrugated surface, it changes the flow direction from time to time, destroying the stagnation flow and forming Artificial turbulence makes the medium reach turbulent flow at a low flow rate. The heat transfer coefficient is large, the structure is compact, and the heat transfer area per unit volume is large. It has a 2501250m2 heat transfer area per cubic meter volume. It is very convenient to disassemble, clean, overhaul, increase or decrease the plate to adjust the heat transfer area, and the operation flexibility is great. Gr9 Titanium Seamless Tubes For Bike Frame
But the flow channel of the medium is narrow and easy to block. The heat dissipated by the hot phase of the plate heat exchanger is transferred to the cold phase through the corrugated metal thin plate so that the cold phase absorbs the heat and the energy is utilized. The boiling temperature is low, and the vacuum cooling is based on the relationship between the boiling temperature and pressure of the solution in a closed container. Low pressure. Under vacuum, the boiling temperature is lower than that under normal pressure. The higher the vacuum, the lower the boiling temperature.  Titanium Planar Sputtering Target
When the high-temperature sodium aluminate liquid enters the vacuum container, because its own temperature is higher than the boiling temperature under the vacuum condition, the liquid achieves the purpose of lowering the temperature while performing self-evaporation. The evaporated gas is condensed by circulating cooling water and then cooled by circulation The water circulates and the liquid is concentrated and cooled. In the vacuum cooling process, part of the self-evaporated heat is taken away with the circulating cooling water and released to the air in the circulating water tower; the other part is discharged into the air with the vacuum pump. The heat of liquid self-evaporation is not reused.

What are the common specifications of titanium screws?

What are the common specifications of titanium screws? Today: just share for you
Screws are indispensable industrial necessities in daily life: such as the smallest screws used in cameras, glasses, clocks, electronics, etc.; general screws for TVs, electrical products, musical instruments, furniture, etc.; for engineering, construction, and bridges, large screws are used, Nuts; transportation appliances, aircraft, trams, cars, etc. are used in combination with small and large screws. Screws have important tasks in the industry. As long as there is an industry on the earth, the function of screws is always important.
Products: Titanium screws, titanium bolts, Titanium Hex Nut, titanium screws
Material: TA1, TA2, TC4, Gr1, Gr2, Gr5
Specification: M4～M25×L
Standard: GBDINISO.
1. titanium metric screw: round head screws, self-tapping screws, hexagonal screws, countersunk head screws, flat head screws, square head screws, double head screws, non-standard screws, fastening screws, standard screws, flat head screws
2. titanium u bolt: external hexagon bolts, square neck bolts, semi-circular head bolts, countersunk head bolts, carriage bolts, bushing combination bolts, various instrument lathe bolts, special-shaped non-standard bolts Uses: electroplating, aluminum oxidation (anodic decomposition ), chemical industry, watch industry, medicine, breeding, electronic hardware, plastics and other industries.
3. Titanium Wing Nut, hexagonal nuts, self-locking nuts, ring nuts, knurled nuts, slotted nuts, hexagon nuts for precision machinery, and special-shaped non-standard nuts.

Characteristics of titanium tube heat exchanger

The heat exchanger is an indispensable device for heat exchange and transfer in the chemical production process. There are often some corrosive and oxidizing materials in the heat exchange, and the materials for manufacturing spiral plate heat exchangers are required to have strong corrosion resistance.

Finned titanium tube heat exchanger is also called tube fin heat exchanger. Its structural feature is that there are many fins on the outer or inner surface of the heat exchanger tube. Commonly used fins are longitudinal and horizontal. Titanium finned tube heat exchangers are used as air coolers and are widely used in industry. wide. The use of air instead of water cooling can not only be used in water-scarce areas, but also in places where there is sufficient water source, the use of air cooling has also achieved greater economic benefits. Of course, the addition of fins will increase the equipment cost, but generally when the ratio of the convective heat transfer coefficient of the two fluids exceeds 3:1, it is economically reasonable to use finned titanium tube heat exchangers. The connection between the fins and the tube surface should be tight, otherwise the contact thermal resistance at the connection is very large, affecting the heat transfer effect. Commonly used connection methods include hot sleeve, inlay, tension winding and welding. In addition, the finned tube can also be manufactured by integral rolling, integral casting, or machining. Gas heating and cooling problems are often encountered in chemical production. Because the convective heat transfer coefficient of the gas is very small, when another fluid that exchanges heat with the gas is water vapor condensation or cooling water, the gas side thermal resistance becomes the heat transfer control factor. To strengthen heat transfer at this time, it is necessary to increase the convective heat transfer area on the gas side. Fins are provided on the gas side of the heat exchange tube, which not only increases the heat transfer area on the gas side, but also enhances the degree of gas turbulence, reduces the thermal resistance on the gas side, and thus increases the gas heat transfer coefficient.

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Application characteristics of titanium alloy plates, titanium alloy rods and other titanium alloy materials in the field of aviation

Titanium alloy has excellent properties such as low density and high strength, and is an ideal aerospace structural material. At present, the application of titanium alloy in the aerospace industry has been favored by people for more and more months.

Titanium alloy has the highest tensile plasticity and can be welded in various ways. The long-term use temperature can reach up to 250 degrees Celsius. It is mainly used to manufacture various low-strength Bancun structural parts on aircraft and engines. Industrial pure titanium has good plasticity, can form various sheet stampings in the cold state, and has high corrosion resistance. The Ti5Al2.5Sn titanium alloy has a moderate room temperature tensile strength (800 ℃ 1000 MPa and good welding performance. Compared with the pure industry titanium, the new titanium alloy mainly includes various different grades of industry pure titanium and widely used Ti5Al2.5Sn Titanium alloy, industrial pure titanium room temperature tensile strength fluctuates in the range of 350 ℃ 700MPa. Ti5Al2.5Sn alloy process plasticity is slightly lower, and the thermal strength is higher, long-term working temperature can be as high as 450 ℃.

With the rapid development of cutting-edge science and technology such as aviation, aerospace, nuclear energy, etc., the requirements for materials are becoming more and more stringent. Not only are the materials for manufacturing equipment parts in these aspects resistant to corrosion, wear, and micro-vibration, but also require high resistance. temperature. It is necessary to pay attention to long-term tests. In many places, before the chemical industry applies titanium on a large scale. Under the test conditions, cooperate to check its service life and material structure. If most of the conventional structural data shows that the lack of safety (immature) results in low economic benefits, then firstly titanium and its alloys must be gradually developed, and the high-tech technology in the field of structural data has been developed in recent decades Mature other new materials. Therefore, the military sector has developed faster than the civilian sector in the application of titanium and its alloys.

In many industrial media, the rare earth and precious metals that are mainly used are often stable, or the corrosion resistance of materials such as stainless steel can only reach a certain limit. Most applications use titanium because of its low density, corrosion resistance and strength. So far. And the cost of consumption is relatively high, so the use of titanium or titanium alloys can obtain higher corrosion resistance. The creep characteristics of hard titanium when it exceeds 150T exceed aluminum and its alloys. Considering that compared with other materials, titanium alloys have unique creep characteristics under low-density conditions, and they have found the advantages of hard titanium in aircraft manufacturing and missile manufacturing. The importance of application. The earliest application of titanium and titanium alloys was in the aerospace industry. Recently, the aerospace industry is increasingly in need of high-strength and low-density materials, which has greatly promoted the development of the titanium manufacturing industry. In the early 1950s, the United States successfully applied titanium to aircraft. At that time, although the E-machine only used 1% of the structural weight of titanium, it pioneered the pioneering way of using titanium in the aviation industry. At present, titanium alloys are widely used as structural materials in many high-speed aircrafts in the world.

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What are the precautions for alkaline cleaning of titanium alloy rods?

Alkaline washing of titanium alloy rods is easy to catch fire, especially alkali washing of titanium sheets is more likely to catch fire. The chemical activity of the titanium alloy rod in the lye, when alkaline washing in the lye containing an oxidant, the overall lye temperature is too high or the local temperature is too high are the reasons for the burning of titanium. Studies have shown that due to the potential difference between the titanium and steel tools in the lye, there is a galvanic effect. When titanium and steel are in contact, galvanic current is formed, and the smaller the contact point, the greater the current and the excessive contact. The current density causes local overheating so that the titanium alloy rod often starts to burn from the contact point of these two metals.

In order to prevent and reduce the ignition of titanium alloy rods during alkaline washing, the following measures can be taken:

1. Selection of qualified alkaline washing liquid components;

2. Strictly control the temperature of lye;

3. Insulate the alkali washing frame with high-temperature resistant coating or high temperature resistant insulating gasket. For example, if a stainless steel alkaline cleaning frame is used, ceramic strips or ceramic pieces can be placed to separate the titanium material from the steel frame, which can also avoid fire.

In the alkaline washing process of titanium alloy rods, the lye is continuously taken away or evaporated by the workpiece, so it is necessary to supplement the lye and adjust it in a timely manner to keep the composition of the lye relatively stable. During alkaline washing, insoluble oxide scale slag settles on the bottom of the tank, which affects the good thermal conductivity of the tank, and the gap caused by the precipitation makes the steel tank prone to electrochemical corrosion, which greatly shortens its service life. Therefore, the sediment should be cleaned up in time. The use of a movable tank bottom to collect slag is a common method. When it is necessary to eliminate sediments, just hang the bottom of the movable tank.

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