摘要
采用高温Ｘ射线衍射、透射电镜等手段研究了Ｆｖ５２０（Ｂ）马氏体沉淀硬化不锈钢经固溶处理＋中间调整处理后不同温度时效处理的显微组织和力学性能。结果表明，４７０℃时效时硬化效果最显著；５２０℃以上时效时，有逆转变奥氏体生成。时效相主要是富铜（ε－Ｃｕ）相、ＮｂＣ、Ｍｏ２Ｃ、Ｍ２３Ｃ６等。６２０℃时效时残余奥氏体量达到最大值，该钢的强度最低；６２０℃以上时效时，发生奥氏体重结晶，残余奥氏体量减少，钢的强度增加。
Microstructure and properties of Fv520(B) steel after solution,intermediate treatment and aging treatment at various temperature have been studied by high temperature(room temperature) XRD and TEM The result shows that the strength reaches the highest value after 470 ℃ aged Reversed austenite forms when aged high 520 ℃,at same time,aging phases begin to grow,aging phases are mostly ε Cu,Mo 2C,NbC,M 23 C 6 etc Retained austenite reaches the highest value at 620 ℃ Transformation of austenite occurs when aged high 620 ℃,which results the retained austenite of room temperature decreasing and strength increasing
出处
《钢铁》
CAS
CSCD
北大核心
1999年第1期44-47,共4页
Iron and Steel
关键词
时效
组织
力学性能
不锈钢
时效温度
Fv520(B) steel,aging treatment,microstructure, mechanical properties
