摘要
研究了常规淬火工艺和亚温淬火工艺对30Cr Mn Si钢硬度和冲击性能的影响,并对显微组织进行了分析。结果表明,常规淬火后,30Cr Mn Si钢显微组织是板条马氏体+残留奥氏体;亚温淬火后,显微组织是细小的板条马氏体+铁素体+残留奥氏体。随着回火温度的升高,两种工艺淬火后的硬度均逐渐降低;常规淬火后的冲击性能曲线呈现"W"状,而亚温淬火后的冲击性能则随着回火温度的升高而增加。亚温淬火工艺能得到最佳的硬度和韧性配合。
Effects of conventional queching process and subcritical quenching process on hardness and impact toughness of 30CrMnSi steel were studied, and the microstructure was analyzed. The results show that microstructure is lath martensite ＋ retained austenite after conventional quenching. After subcritical quenching, microstructure is fine lath martensite ＋ ferrite ＋ retained austenite. With the increase of the tempering temperature, hardness after two processes quenching all decreases. Impact toughness curve of conventional quenching shows“W” shape, and the impact toughness of subcritical quenching increases with the increase of tempering temperature. The best match of hardness and toughness can be obtained by subcritical quenching process.
出处
《金属热处理》
CAS
CSCD
北大核心
2015年第4期74-76,共3页
Heat Treatment of Metals
基金
河南省科技厅项目(132300410459)
