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Precision stainless steel strip heat treatment and finishing process?

Nov 26, 2019

       The heat treatment process of precision stainless steel strip is basically the same as that of ordinary stainless steel plate. The typical heat treatment process of 300 series austenitic stainless steel is solution treatment. During the heating process, the carbides are dissolved into austenite, heated to 1050 ~ 1150 ℃, maintained for a short period of time, so that all the carbides are dissolved in austenite, and then quickly cooled to below 350 ℃ to obtain supersaturated solid solution, which is uniform Unidirectional austenite structure. The key to this heat treatment process is rapid cooling, which requires a cooling rate of 55 ° C / s, and quickly passes through the re-precipitation temperature zone (550-850 ° C) after the solid solution of carbides. The holding time should be as short as possible, otherwise the grains will be coarse and affect the Surface finish. The 400 series ferritic stainless steel has a relatively low heating temperature (about 900 ° C), and slow cooling is often used to obtain an annealed softened structure.