等温正火处理对20CrMo钢切削性能的影响  

Influence of isothermal normalizing on microstructure and properities

作　　者：于英杰[1] 程柏松[1] 

机构地区：[1]长春工业大学材料科学与工程学院,长春130012

出　　处：《现代制造工程》2007年第1期73-75,共3页Modern Manufacturing Engineering

摘　　要：对锻造后低合金渗碳钢20CrMo采用不同工艺的等温正火处理，应用电子显微镜和布氏硬度仪检测了显微组织和硬度，并运用表面轮廓仪对等温正火和普通正火处理下的抛光试样的微观形貌进行对比。综合分析得出，该钢显微组织为铁素体加细片状珠光体，无贝氏体型非平衡组织，硬度范围160—180HB，切削性能良好。与普通正火处理相比，等温正火处理工艺具有更大的优越性。Treated the low-alloy earburizing steel 20CrMo through the residual forged heat isothermal normalizing in different technological conditions. Then detect its mierostrueture and hardness, apply surface profilometer to compare the micro-surface feature of the isothermal normalized samples with normalized. It＇s analyzed that the mierostrueture of this steel should be ferrite and perlite, the range of hardness is 160-180 HB, and it includes well maehinability. Compare with normalizing, isothermal normalizing has better superiority.

关 键 词：20CRMO钢 等温正火 切削性能 微观表面状态 

分 类 号：TG156[金属学及工艺—热处理]