【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。更多还原

【Abstract】 Treated the low-alloy carburizing steel 20CrMo through the residual forged heat isothermal normalizing in different technological conditions.Then detect its microstructure and hardness,apply surface profilometer to compare the micro-surface feature of the isothermal normalized samples with normalized.It’s analyzed that the microstructure of this steel should be ferrite and perlite,the range of hardness is 160-180 HB,and it includes well machinability.Compare with normalizing,isothermal normalizing has better superiority.更多还原