The welding method of titanium alloy and stainless steel is characterized by: combining titanium alloy and stainless steel by vacuum secondary brazing; Among them, the first vacuum brazing uses nickel-based welding material, which melts into the stainless steel joint surface through high temperature, and diffuses to form an alloyed joint surface on the stainless steel joint surface. The second vacuum brazing uses a silver-based welding material and is combined with a titanium alloy with an alloyed bonding surface of stainless steel. The welding method can increase the bonding strength by 25% compared with the general brazing method of silver based welding material. Compared with the similar welding method of stainless steel surface plating nickel process, it is not easy to produce environmental pollution, will not cause problems such as easy stripping of the plating layer and leakage of the plating solution, and can simplify the heat treatment procedure of the corresponding material.
The combination of titanium alloy and stainless steel by silver-based brazing can effectively avoid the occurrence of the above problems, so that the energy is transmitted between the two materials and can withstand higher temperatures. In order to improve the bonding strength of silver-based brazing combined titanium alloy and stainless steel, some manufacturers have developed a way to combine by electroplating, that is, electroplating nickel on the steel bonding surface, and then the titanium alloy and nickel-plated stainless steel interface by coating silver-based welding materials, and finally brazing, which can effectively improve the bonding strength of titanium alloy and stainless steel.
The invention relates to a welding method of titanium alloy and stainless steel, which combines titanium alloy and stainless steel by vacuum secondary brazing method; Among them, the first vacuum brazing uses nickel-based welding material, which melts into the stainless steel joint surface through high temperature, and diffuses to form an alloyed joint surface on the stainless steel joint surface. The second vacuum brazing uses a silver-based welding material and is combined with a titanium alloy with an alloyed bonding surface of stainless steel.
The working principle and advantages are: The welding method of titanium alloy and stainless steel is based on vacuum brazing process to alloying nickel-based welding material with stainless steel surface layer, so there is no environmental pollution, no coating stripping and plating solution leakage, etc., and nickel-based welding material with different temperature conditions can be selected with stainless steel heat treatment conditions, and stainless steel heat treatment (solid solution, quenching) is applied to reduce other process steps. Improve equipment utilization and product profit.
