Titanium plate has high corrosion resistance and specific strength, widely used in electric power, chemical industry, aviation parts, building materials, sports equipment, medical and other fields, and is still expanding. Titanium plate has the advantages of low price, high performance, multi-functional, easy to produce and so on.
The quality of titanium plate depends largely on the smelting process, including the chemical composition of titanium, the cleanliness of titanium water (gases, harmful elements, inclusions) and the quality of the billet (compositional segregation, decarburisation and surface condition) which are the key control points of the smelting operation. In addition, industrial titanium plates require sufficient hardenability to ensure uniform microstructure and mechanical properties throughout the spring section. Oxide inclusions in titanium are the main cause of fatigue cracks, and D inclusions are more damaging to fatigue life than B inclusions. Therefore, foreign titanium factories and automobile factories have put forward higher requirements for oxide inclusions in industrial titanium plates. For example, the Swedish SKF standard requires the oxygen content in titanium to be less than 15×10~(-6), and the oxygen content of D inclusions is lower than that of B inclusions.
Titanium plate because of its special physicochemical properties, its welding process is very different from other metals. Titanium welding is a TIG welding process that uses inert argon gas to effectively protect the weld area. Before using argon gas to check the bottle factory certificate, confirm the purity of argon gas indicators, and then check whether the bottle valve leakage or failure. 250 ℃ above the welding zone metal without reactive gas N0h and harmful impurity elements CFeMn contamination. Purity not less than 99.98%, water content less than 50mg/m32 argon, industrial grade pure argon, can form coarse crystal organisation. Welding process must be carried out in accordance with the predetermined construction sequence, can not produce large welding residual stress and residual deformation.
