淬火介质对耐磨铸钢组织和性能的影响  

Effect of Quenching Medium on Microstructure and Properties of Wear-Resistant Casting Steel

作　　者：张雅静[1] 方胜民[1] 王金宝[1] 张国志[1] 

机构地区：[1]东北大学材料科学与工程学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2017年第5期650-654,共5页Journal of Northeastern University(Natural Science)

基　　金：军工"十二五"预研项目(2011CY01YY01);辽宁省科学技术基金资助项目(201403798);沈阳市科学技术基金资助项目(F14-231-1-03)

摘　　要：分别研究了以水和机油作为淬火介质的42CrMo钢和双相耐磨钢淬火+回火后的显微组织和性能.确定了双相耐磨钢和42CrMo钢的最佳热处理工艺及性能.结果表明:双相耐磨钢经水淬和油淬回火后的显微组织均为板条马氏体+针状贝氏体+碳化物;42CrMo钢经水淬和油淬回火后的显微组织分别为回火马氏体+残余奥氏体和回火马氏体+铁素体+贝氏体.经过480h的低应力磨料磨损实验发现,水淬+280℃回火处理的42CrMo钢耐磨性能最好,其相对耐磨性可达高锰钢的1.558倍.Microstructures and properties of 42 CrMo steel and dual-phase wear-resistant steel after a quenching and tempering treatment were investigated,where water and quenching oil were used as quenching medium,respectively. The results showthat both microstructures of the waterquenched + tempered and oil-quenched + tempered dual-phase wear-resistant steels are lath martensite,needle-like bainite and carbide. The microstructures of the water-quenched + tempered and oil-quenched + tempered 42 CrMo steels are tempered martensite and retained austenite,and tempered martensite,ferrite and bainite,respectively. The optimum heat treatment and properties of 42 CrMo steel and dual-phase wear-resistant steel can be obtained after the comparison of their microstructures and properties. As a result,the wear-resistant property of 42 CrMo steel after water-quenching and tempering at 280℃ treatment is the best one,which is 1. 558 times higher than that of a high manganese steel in a 480 h low-stress abrasive wear experiment.

关 键 词：双相耐磨钢 42Cr Mo钢 淬火介质 热处理 组织和性能 磨料磨损 

分 类 号：TG142.1[一般工业技术—材料科学与工程]