硅合金钢淬火组织中残留奥氏体的力学稳定性与力学性能  

Mechanical Property and Mechanical Stability of Retained Austenite in Quenching Microstructure of an Alloy Steel Containing Si

作　　者：康沫狂[1] 朱明[1] 陈大明[2] 华文君[2] 

机构地区：[1]西北工业大学材料科学与工程学院,陕西西安710072 [2]北京航空材料研究院,北京100095

出　　处：《金属热处理》2005年第1期14-19,共6页Heat Treatment of Metals

摘　　要：对含Si合金钢两相 (马氏体 M ,贝氏体 B)区系列等温淬火显微组织中残留奥氏体稳定性进行了研究。结果表明 ,在下贝氏体区等温淬火可获得准 (无碳化物 )贝氏体 (BF +AR)组织 ,合理的回火工艺可使显微组织中残留奥氏体减少到适量 ,增加残留奥氏体中的C含量 ,降低Ms、Md点温度和提高其力学稳定性 。The retained austenite stabilization in isothermal quenching microstructure at duplex phase ( martensite and bainite) region of an alloy steel containing Si was studied. The results show that at the lower bainite area, meta-(carbide free) bainite can be achieved, and will be tempered reasonably which can decrease the retained austenite to a proper amount as well as increase the C content in retained austenite. The rich C content can lower the temperature of Ms and Md and raise the mechanical stability of retained austenite so as to reach the best combination of strength and toughness of the steel.

关 键 词：残留奥氏体 力学稳定性 准贝氏体 

分 类 号：TG113.25[金属学及工艺—物理冶金] TG142.3[金属学及工艺—金属学]