摘要
利用L78淬火膨胀仪测定了45Mn2钢在不同冷却速度下的组织转变,采用OLS4000激光共聚焦显微镜、QUANTA-400型环境扫描电子显微镜观察了组织,使用维氏硬度计测量了钢的硬度。结果表明:45Mn2钢在冷速10~20℃/s时,金相组织是铁素体+珠光体+魏氏组织;在30~50℃/s,金相组织是马氏体+魏氏体;在138℃/s时,组织是马氏体+贝氏体。随冷速增加,钢的硬度值增加。
The microstructure transformation of 45Mn2 steel under different cooling rates was determined by L78 quenching expansion instrument. The microstrueture was observed using OLS4000 laser scanning confocal microscope and QUANTA-400 environment scanning electron microscope. Hardness of the steel was measured using a Vickers hardness tester. The results show that：during the cooling speed of 10-20 ℃/s, the microstructure of 45Mn2 steel is ferrite＋pearlite＋ widmanstatten; at 30-50℃/s, the microstructure is martensite ＋Widmanstatten; and at 138 ℃/s, the microstructure is martensite＋bainite. The hardness value of the steel increases with the increase of cooling rate.
出处
《热加工工艺》
CSCD
北大核心
2017年第12期228-231,共4页
Hot Working Technology
基金
内蒙古科技大学基金资助项目(2015KYYQ02)
