How to reduce the damage of cold working to stainless steel pipe?
1. The stainless steel pipe standards in most countries, especially the European unified stainless steel pipe standards, stipulate that all stainless steel seamless steel pipes must be supplied in a solid solution or annealed state to eliminate performance damage caused by cold working and welding. 2. Three key parameters should be paid attention to during solution treatment: heating temperature, rapid cooling method and high temperature residence time. Excessively high solution treatment temperature or residence time will be detrimental to the corrosion resistance of the material. To determine whether the solid solution is in place, the hardness measurement, flaring, crimping, flattening, and tensile data can be determined, and the hardness measurement is the easiest. 3. Due to solid solution or annealing due to high temperature heating and pickling treatment, the manufacturing cost and production cycle are significantly increased. In addit...