CAJ | 학술논문

研究了常规淬火工艺和亚温淬火工艺对30CrMnSi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,30CrMnSi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。
연구료상규쉬화공예화아온쉬화공예대30CrMnSi강경도화충격성능적영향,병대현미조직진행료분석。결과표명,상규쉬화후,30CrMnSi강현미조직시판조마씨체+잔류오씨체；아온쉬화후,현미조직시세소적판조마씨체+철소체+잔류오씨체。수착회화온도적승고,량충공예쉬화후적경도균축점강저；상규쉬화후적충격성능곡선정현“W”상,이아온쉬화후적충격성능칙수착회화온도적승고이증가。아온쉬화공예능득도최가적경도화인성배합。
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.