马氏体沉淀硬化不锈钢真空热处理畸变的研究

采用马氏体沉淀硬化不锈钢的C形畸变试样,进行真空热处理及气体保护炉热处理变形量的试验研究,并采用金相显微镜、扫描电镜分析不同变形的畸变试样的显微组织,得出本试验条件下的结论:马氏体沉淀硬化不锈钢真空调整、时效的畸变量小于气体保护炉调整、时效的畸变量;真空热处理炉上部的畸变量略大,但抗畸变性能很好;固溶化工序的畸变大于调整工序的畸变;不同结构尺寸的畸变试样变形差异很大,对提高测试精度很有帮助。本试验的结论对控制真空热处理的畸变具有指导意义。

Study on Vacuum Heat Treatment Distortions of Martensite Precipitation Hardening Stainless Steel

The C-shaped distorted specimens of martensitic precipitation hardening stainless steel were used to carry out the heat treatment distortion study by vacuum heat treatment and gas shielded furnace heat treatment.The metallographic microscope and SEM were used to analyze the microstructure of specimens with different deformation.The results show that the distortion of martensitic precipitation hardening stainless steel by vacuum adjustment and aging is less than that by gas shielded furnace adjustment and aging.The distortion of the specimens in the upper part of the vacuum furnace is larger than that in the lower part,but the anti-distortion performance is very good.The distortion of solution treatment process is greater than that of the adjustment.Deformation of specimens with different structural sizes varies greatly,which is very helpful for improving the test accuracy.The result of this study is instructive to control distortion of vacuum heat treatment.