渗碳后奥氏体化温度对12Cr2Ni4钢淬火后显微组织和力学性能的影响  

Effect of Austenitizing Temperatures after Carburizing on Microstructure and Mechanical Properties of 12Cr2Ni4 Steel

作　　者：曲树仁 杨旺久 朱金龙[1] 李宁[1] QU Shuren;YANG Wangjiu;ZHU Jinlong;LI Ning(Shenyang Kejin Special Material Co.,Ltd.,Shenyang 110101,Liaoning China)

机构地区：[1]沈阳科金特种材料有限公司,辽宁沈阳110101

出　　处：《热处理》2023年第1期59-60,共2页Heat Treatment

摘　　要：对直径为60 mm的12Cr2Ni4圆钢进行了渗碳及分别在770℃、790℃和810℃奥氏体化后油淬和220℃回火。随后检测了圆钢的心部显微组织和力学性能。结果表明:770℃油淬的圆钢心部组织为回火马氏体和少量铁素体,因此力学性能较差;790℃和810℃油淬的圆钢心部组织为回火马氏体,无铁素体;经790℃油淬随后220℃回火的12Cr2Ni4圆钢的综合力学性能最佳。60-mm-diam 12Cr2Ni4 steel bars were carburized,austenitized at 770℃,790℃ and 810℃ and oil quenched,and tempered at 220℃,respectively.After this,the steel bars were tested for microstructure and mechanical properties in their core.The results demonstrated that(a)the steel bar oil quenched from 770℃displayed microstructure consisting of tempered martensite and a small amount of ferrite therefore poorer mechanical properties in its core;(b)the steel bars oil quenched from 790℃ and 810℃ exhibited microstructrue consisting of tempered martensite,and were devoid of ferrite in their core;and(c)the steel bar quenched from 790℃ and then tempered at 220℃ had the best combination of mechanical properties.

关 键 词：奥氏体化温度 铁素体 力学性能 

分 类 号：TG156.8[金属学及工艺—热处理]