A significant feature of the titanium plate is its strong corrosion resistance. This is because it has a particularly strong affinity for oxygen and can form a dense oxide film on its surface, which can protect titanium from corrosion by the medium. , Neutral saltwater solution has good stability in the oxidizing medium and has better corrosion resistance than existing stainless steel and other commonly used non-ferrous metals.
The quality of the titanium plate is largely determined by the smelting process of the titanium plate manufacturer, including the chemical composition of the titanium, the cleanliness of the titanium water (gas, harmful elements, inclusions) and the quality of the casting billet (component segregation, decarburization and Its surface condition), these aspects are the key control points of smelting operations.
In addition, industrial titanium plates also require sufficient hardenability to ensure uniform microstructure and mechanical properties across the spring section. The main cause of fatigue cracks in the oxide inclusions in titanium and the damage of type D inclusions to fatigue life is greater than that of type B inclusions. Therefore, foreign titanium factories and automobile factories have put forward higher requirements for the oxide inclusions in industrial titanium plates. For example, the Swedish SKF standard requires that the oxygen content in titanium is lower than 15-10-6, and the type D inclusions are lower than the type B inclusions. Things. In particular, Al2O3 and TiN inclusions are extremely harmful to the fatigue life of titanium springs. In order to produce high-quality industrial titanium plates, special smelting methods such as electric furnace-electro slag remelting or vacuum arc remelting are usually used in the past.
Because the titanium plate and titanium rod have special physical and chemical properties, their welding process is very different from other metals. Titanium welding is a TiG welding process that effectively protects the welding area by inert argon gas. Before using argon gas, check the factory certificate on the bottle body to verify the purity index of the argon gas, and then check whether the bottle valve leaks Or failure phenomenon.
When welding titanium plates and rods, you must ensure:
The metal in the welding zone is not polluted by the active gas NOH and harmful impurity elements CFeMn above 250℃. The purity shall not be less than 99.98%, and the water content shall be less than 50Mg/m32. Argon: industrially superior pure argon.
Can not form coarse grain structure. The welding process must be in accordance with the predetermined construction sequence, and can not produce large welding residual stress and residual deformation. so. Strictly follow the process of quality management standards and implement the whole process of quality control. All factors of human, machine, material and method are in a good controlled state, so as to ensure the welding quality of titanium pipe within a reasonable period of time.
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