Many petroleum industry factories use oil, casing, and stainless steel tube annealing heat treatment to remove residual stress and improve the overall performance of the workpiece. Annealing heat treatment is to slowly and uniformly heat the workpiece to a certain temperature, then hold it at this temperature for a period of time, and then slowly and uniformly cool down gradually. In this process, it is important to keep the cooling rate of each part of the workpiece the same. Otherwise, after c...
Updated :2019-10-15