Precautions for use of titanium rod filter and cleaning method

Titanium alloy plates and titanium plates are mainly used to manufacture various containers, reactors, heat exchangers, distillation towers, pipes, pumps and valves in the petrochemical machinery manufacturing industry. Titanium can be used as a titanium cathode and condenser in power stations, as well as environmental pollution control devices. The hardness of steel is higher than that of titanium plate, but the specific strength or tensile strength of titanium alloy is higher than that of high-quality steel. Titanium alloy has good heat resistance, low temperature toughness and fracture toughness, so it is mostly used as aircraft engine parts and rocket and missile structural parts. Titanium alloy can also be used as fuel and oxidant storage tanks and high-pressure vessels. At present, titanium alloys are used to make automatic rifles, mortar seat plates and recoilless gun launch tubes.

1. Memory function

Titanium-nickel alloy has one-way, two-way and omnidirectional memory effects at a certain ambient temperature, and is recognized as the best memory titanium alloy. Pipe joints are used in engineering for the hydraulic system of fighter jets; the oil pipeline system of oil complexes; the parabolic mesh antenna with a diameter of 500mm made of 0.5mm wire is used on aerospace vehicles; used in medical engineering to make snoring Treatment; Titanium plates are made into screws for fracture healing. The above applications have achieved obvious results.

2. Superconducting function

The niobium-titanium plate exhibits a superconducting function with zero resistance when the temperature is lower than the critical temperature.

3. Hydrogen storage function

Titanium-iron alloy has the property of absorbing hydrogen, which can store a large amount of hydrogen safely, and release hydrogen in a certain environment. This is very promising in hydrogen separation, hydrogen purification, hydrogen storage and transportation, and the manufacture of heat pumps and batteries that use hydrogen as energy.

Titanium dioxide, the oxide of the titanium plate, is a white powder and a better white pigment, commonly known as titanium white. In the past, the main purpose of mining titanium ore was to obtain titanium dioxide. Titanium dioxide has strong adhesion, is not easy to undergo chemical changes, and is always white. Especially valuable is that titanium dioxide is non-toxic. It has a high melting point and is used to make refractory glass, glazes, enamel, clay, and high-temperature laboratory utensils.

Gr36 Ti45Nb Titanium Bar     Gr23 Ti-6Al-4V ELI Titanium Wire     ERTi-12 Titanium Welding Wire     Gr23 Ti-6Al-4V ELI Titanium Pipe

Heat treatment of titanium alloy

Commonly used heat treatment methods are annealing, solution and aging treatment. Annealing is to eliminate internal stress, improve plasticity and structural stability, and obtain better overall performance. Usually, the annealing temperature of α alloy and (α＋β) alloy is selected at 120～200℃ below the (α＋β)-→β phase transformation point; the solution and aging treatment are rapid cooling from the high-temperature zone to obtain martensite α′ phase and metastable Then the meta-stable phases are decomposed by heat preservation in the middle-temperature zone, and the fine and dispersed second phase particles such as the α phase or compounds are obtained to achieve the purpose of strengthening the alloy. Usually (α+β) alloys are quenched at 40～100℃ below the (α＋β)─→β phase transformation point, and metastable β alloys are quenched at 40～80℃ above the (α＋β)─→β phase transformation point. The aging treatment temperature is generally 450～550℃.
In summary, the heat treatment process of titanium alloy can be summarized as:
(1) Stress relief annealing: the purpose is to eliminate or reduce the residual stress generated during processing. Prevent chemical attack and reduce deformation in some corrosive environments.
(2) Complete annealing: the purpose is to obtain good toughness, improve processing performance, facilitate reprocessing and increase the stability of size and structure.
(3) Solution treatment and aging: The purpose is to improve its strength. α titanium alloy and stable β titanium alloy cannot be strengthened heat treatment, and only annealing is carried out in production. α+β titanium alloy and metastable β titanium alloy containing a small amount of α phase can further strengthen the alloy through solution treatment and aging.
In addition, in order to meet the special requirements of the workpiece, the industry also uses metal heat treatment processes such as double annealing, isothermal annealing, β heat treatment, and thermomechanical heat treatment.
Gr7 Ti-0.2Pd Titanium Foil     Gr12 Ti-0.3Mo-0.8Ni Titanium Plate     F5 Titanium Forging     F1 Pure Titanium Forging

The characteristics and application scope of titanium container and titanium equipment

Titanium materials have the characteristics of high hardness, lightweight, and corrosion resistance. Due to the superior performance and characteristics of titanium materials, they are made into titanium equipment and are widely used in many fields such as industry and chemical industry.
(1) Titanium has stronger corrosion resistance than stainless steel and aluminum in many media. Moreover, titanium has a light specific gravity and high specific strength.
Titanium is easy to produce dense titanium oxide passivation film on its surface in air and oxidizing, neutral aqueous medium, which makes the electrode potential of titanium significantly positively shift and greatly improves the thermodynamic stability. The passivation coefficient is used to express the degree of improvement of the chemical stability of the metal after passivation, iron is 0.18, nickel is 0.37, molybdenum is 0.49, chromium is 0.74, aluminum is 0.82, and titanium is 2.44.
(2) Titanium does not have the low-temperature brittleness problem like ferritic steel. Titanium can be used as a low-temperature container with a temperature as low as -269 degrees, but because austenitic stainless steel, aluminum, copper, etc. can also be used as a low-temperature container, It is also cheaper than titanium, so titanium is actually rarely used in low-temperature fixed containers. In aviation and aerospace, titanium is used as a mobile cryogenic container. It is important to use titanium's high specific strength, lightweight and characteristics.
(3) Carbon steel, low alloy steel, generally stainless steel, and aluminum have poor corrosion resistance in seawater, saltwater and other chlorine-containing media. Titanium has unique and excellent corrosion resistance, and about 50% of titanium containers are used To resist the corrosion of chlorine-containing media.
(4) Since the corrosion resistance of titanium is caused by the surface oxide film, general industrial pure titanium and titanium alloys are not resistant to corrosion in strong reducing media such as high-temperature hydrochloric acid. Ti-32Mo is resistant to hydrochloric acid corrosion, but its plasticity and process properties are poor. It has not been included in the pressure processing titanium standard, nor is it included in this standard as titanium for containers.
(5) Titanium fuming nitric acid, dry chlorine, methanol, trichloroethylene, liquid dinitrogen tetroxide, molten metal salt, carbon tetrachloride and other media under certain conditions may cause combustion, explosion or stress corrosion to cause titanium container If a malignant accident occurs, titanium containers should be avoided or used with caution for these media.
(6) Titanium will burn in pure oxygen with a temperature of more than 500 degrees or in the air with a temperature of more than 1200 degrees. Therefore, the titanium container must not be exposed to open flames in contact with air and oxygen to avoid burning of the titanium container.
(7) Titanium materials and titanium containers are generally not required to assess impact toughness.
(8) Titanium has excellent corrosion resistance. More than 90% of the industrial pure titanium TA1 and TA2 are used in the civil industry to make various titanium equipment, and 3/4 of this titanium equipment are used to make titanium containers. Therefore, China's titanium container occupies a pivotal position in the titanium industry.
Grade 23 Titanium Bar     grade 5 titanium wire     titanium tube grade 9     Grade 12 Titanium Plate

Development characteristics of titanium alloy materials and titanium product processing technology

Due to the high manufacturing cost of titanium alloys, in order to reduce costs, the competitiveness of titanium alloys in the entire metal material market has been improved at a lower price. It is generally believed that titanium has incomparable superior performance compared with other materials, but the price of titanium often discourages consumers (especially automakers). The emergence of high-quality, low-cost titanium alloys will certainly help the popularization and application of titanium and titanium alloys.
Judging from the application status at home and abroad and the development of titanium processing technology, the plastic processing technology of titanium and titanium alloys will develop in the following directions in the future:
1) High performance, that is, the development of alloys with higher service temperature, higher specific strength, higher specific modulus, better corrosion resistance and wear resistance.
2) Multi-function, namely the development of titanium alloys with various special functions and uses, such as high damping, low expansion, constant resistance, high resistance, resistance to electrolytic passivation and hydrogen storage, shape memory, superconductivity, low modulus biomedical Other titanium alloys, and further expand the application of titanium and titanium alloys.
3) Deepen the research of traditional alloys, improve the practical performance of existing alloys, and expand the application range of traditional alloys through the improvement of equipment and processes.
4) Adopt advanced processing technology and large-scale continuous processing equipment to develop continuous processing technology, direct rolling technology, cold forming technology and near-net forming technology to improve the production efficiency, yield and product performance of titanium alloys.
5) Reduce costs, develop alloys that contain no or almost no precious metal elements, and add cheap elements such as iron, oxygen and nitrogen, and develop titanium alloys that are easy to process and shape, easy to cut, and alloy elements and master alloys are cheap. Develop titanium alloys and use banned materials to increase the recovery rate and utilization rate of banned titanium. This is particularly important for reducing the cost of civilian titanium alloys.
6) Use advanced computer technology to simulate the deformation and processing of the workpiece, predict the evolution of the metal microstructure, and even predict the mechanical properties of the product (yield strength, tensile strength, elongation, hardness, etc.). ), and design or improve molds and tooling; analyze and process test results, reduce test volume, improve work efficiency, and reduce development costs.
grade 5 titanium bar     Grade 12 Titanium Wire     titanium square pipe     6al4v titanium sheet

Titanium tube has good strength and mechanical properties

Titanium tubes are light in weight, high in strength, and superior in mechanical properties. They are widely used in heat exchange equipment, such as tubular heat exchangers, serpentine tube heat exchangers, condensers, evaporators and transportation pipelines. At present, many nuclear power industries use titanium tubes as standard tubes for their units. The titanium tube is made by an extrusion process, and the welded titanium tube is made by crimping and welding the plate. Generally, seamless titanium pipe has a relatively small wall thickness and a relatively small diameter.
Technical requirements for titanium tube:
1. The allowable deviation of the outer diameter of the pipe meets the requirements of Table 1.
2. The length of the pipe should meet the requirements of Table 2.
3. The allowable deviation of pipe wall thickness should not exceed ±12.5% ​​of its nominal wall thickness. The allowable deviation of pipe wall thickness is not suitable for the weld of titanium welded pipe.
4. The chemical composition of titanium and titanium alloy tubes meets the requirements of GB/T3620.1, and the allowable deviation of the chemical composition meets the requirements of GB/t3620.2 when the buyer re-inspects.
5. Within the range of fixed length or multiple lengths of the pipe, the allowable deviation of the fixed-length is ±10mm, and the multiple lengths should also be included in the cut amount when the pipe is cut. Each cut should be 5mm.
Titanium alloy has high strength, low density, good mechanical properties, toughness and corrosion resistance. In addition, titanium alloys have poor process performance and difficult cutting processing. In hot processing, it is very easy to absorb impurities such as hydrogen, oxygen, nitrogen, and carbon. It also has poor abrasion resistance and complex production processes.
6al4v titanium round bar     titanium spool wire     titanium alloy welding wire     titanium alloy powder

How to remove the reactive layer of titanium screws

When titanium screws are not subjected to any surface treatment, the color of the entire screw is silver-gray, and it is super common in daily use. Sometimes there are many different colors of titanium screws on bicycles and cars. These colorful titanium screws It is so bright and colorful after a certain surface treatment, let's share with you how to eliminate the reaction layer of titanium screws.
1. Sandblasting
The sand particles are impacted on the surface of the titanium screw, thereby generating intense sparks, and the temperature rise will react with the surface of the titanium screw, forming secondary pollution and affecting the surface quality. It takes 15 to 30 seconds to remove the sticky sand, surface sintered layer and part of the oxide layer on the surface of the casting. The reaction layer on the remaining surface is quickly removed by chemical pickling.
2. Pickling
The use of pickling can quickly and effectively remove the reaction layer on the surface of the titanium screw without causing pollution of other metal elements.
Titanium screws look like steel with a silver-white luster. It is a common transition metal. Pure titanium screws have high strength, low density, high hardness, high melting point and strong corrosion-resistance, so many of them can be used.
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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.