Introduction of various new processes for titanium alloy processing

A few days ago, the technical project of "production process of titanium heat exchanger pipe" passed the evaluation of scientific and technological achievements. This technical process is mainly improved for the traditional hot rolling process of seamless steel pipes, and transplanted to the production of titanium alloy seamless pipes, which is similar to the traditional "extrusion forming, bar drilling and boring and cross-rolling and piercing followed by cold rolling and cold drawing" process. The finished product rate of pipes is significantly improved, reaching 97%.

Through the characteristics of titanium alloy tubes, the project has made targeted improvements in the production process. The addition of thermal insulation tunnels and rapid transfer devices to the power of the main motor is innovative to a certain extent. Large titanium alloy tubes up to 12m in length.

 The cutting of titanium and titanium alloy pipes should be carried out mechanically, and the cutting speed should be low; when cutting or grinding Titanium Alloy Seamless Rectangular Pipe with grinding wheels, special grinding wheels should be used; flame cutting should not be used. The groove should be processed mechanically. Titanium alloy processing and welding should use inert gas shielded welding or vacuum welding, not oxygen-acetylene welding or carbon dioxide gas shielded welding, nor ordinary manual arc welding. When installing titanium and titanium alloy pipes, iron tools and materials should not be used to knock and squeeze; between carbon steel supports, hangers and titanium and titanium alloy pipes, rubber sheets or soft plastic sheets should be placed to prevent Titanium and titanium alloy pipes are in direct contact.

 When the titanium and titanium alloy pipes pass through the wall and floor, the casing should be installed, the gap should not be less than 10mm, and the insulation should be filled, and the insulation should not contain iron impurities. Titanium alloy pipes should not be directly welded to other metal pipes. When a connection is required, a looper flange connection can be used. The non-metallic gaskets used are generally rubber gaskets or plastic gaskets, and the chloride ion content should not exceed 25ppm.