Titanium-steel clad plate, also known as titanium-steel bimetallic layered clad plate, is a layered composite material formed by combining titanium or titanium alloys with excellent performance with steel materials by forming processes such as rolling and welding. Among them, titanium with a higher price is usually used as a cladding material, and its thickness accounts for a small proportion of the composite plate, which mainly plays the role of improving the corrosion resistance of the composite plate; the steel material with a lower cost is usually used as a base material, and its thickness is small. It accounts for a large proportion, which mainly plays a role in ensuring the structural strength of the composite board. Through the organic composite of titanium clad plate and steel substrate, it has a series of advantages of titanium alloy and steel material, such as good corrosion resistance, high plasticity and toughness, and high-cost performance. At present, titanium-steel composite plates have been widely used in marine engineering, freshwater engineering, marine engineering, and mechanical and chemical fields, and are also an important development direction in the field of composite materials.
Welding, as an important and commonly used forming technology, plays an increasingly important role in the application and promotion of titanium-steel clad plates. When welding titanium-steel clad plates, due to the particularity of the material composition and layered structure, it is not only necessary to consider the welding characteristics of titanium alloys, iron and steel materials, and titanium-steel dissimilar metals, but also the welding process of the composite plate. The effect of properties, especially the dilution of titanium cladding during welding, needs special attention. Therefore, in the welding process of titanium steel clad plate, the following factors need to be paid attention to, first, there is a big difference in physical properties such as melting point and thermal conductivity between the titanium and steel that constitute the titanium-steel clad plate, and there will be large residual stress at the joint after welding, which will easily lead to the initiation of cracks; secondly, When the titanium cladding is heated to about 300, 450 and 600 °C, it will absorb H, O, and N respectively, which also increases the possibility of pores, cracks and other defects in the composite plate joints; in addition, according to Ti-Fe In the binary phase diagram, brittle intermetallic compounds such as TiFe2 and TiFe are easily formed between Ti and Fe, which affects the performance of the joint; in addition, when titanium and steel undergo alloying reaction to form brittle intermetallic compounds, it will also lead to titanium cladding. Therefore, compared with the base metal, the corrosion resistance of the welded joint will be seriously reduced.
At present, scholars at home and abroad have carried out extensive research on the welding technology of titanium-steel clad plates, and the main welding methods involved include conventional argon tungsten arc welding, gas metal arc welding, laser welding, etc. Technology has played an important role in facilitating the engineering application of composite plates.
With the continuous increase in the application field of titanium-steel clad plates and the continuous development of welding technology, welding technology will play an increasingly important role in promoting the engineering application of titanium-steel clad plates. At the same time, the experimental and theoretical research on the welding of titanium-steel clad plates will also provide guidance and reference for the welding of difficult-to-weld dissimilar metals and other clad plates.
Baoji Taicheng Clad Metal Materials Co., Ltd is a metal composite plate factory. The factory has more than 300 employees, of which the R&D technical team accounts for 10%. With the support of many excellent employees, our factory has been able to stand in the industry for more than ten years. . At present, the company is still developing steadily, if you are interested in our products, or want to know more about our products and company, welcome to consult!
