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在Themoresto-W热模拟试验机上对410S不锈钢进行压缩试验,获得不同变形条件下的真应力-真应变曲线,用JP-200型倒置金相显微镜观察不同温度下410S压缩试样的显微组织;分析了应变速率为2.5 s-1时,变形温度对真应力-真应变曲线的影响,变形温度和变形部位对压缩试样显微组织的影响。结果表明,在相同应变速率下,真应力随变形温度增加而下降;试样中心部位受力及变形情况最彻底,为显微组织最好观察区域;随变形温度升高,再结晶变得越来越易进行,动态再结晶程度和晶粒尺寸也均增大。
410S stainless steel was subjected to compression test on Themoresto-W thermal simulation machine to obtain true stress-strain curves under different deformation conditions. The microstructure of 410S compressed specimens at different temperatures was observed by JP-200 inverted metallurgical microscope. The effect of deformation temperature on true stress - true strain curve, deformation temperature and deformation location on the microstructure of the compressed specimen were analyzed when the strain rate was 2.5 s-1. The results show that under the same strain rate, the true stress decreases with the increase of the deformation temperature. The stress and deformation are the most complete at the center of the specimen, which is the best observation area of the microstructure. With the increase of the deformation temperature, the recrystallization becomes more The easier it is to perform, the greater the degree of dynamic recrystallization and the grain size.