湖南大学学报（自然科学版）2016，Vol.43Issue(12)：11-16,6.
高锰钢形变过程中加工硬化机理的研究∗
Study on Work Hardening Mechanism of Hadfield Steel during Deformation Process
摘要
Abstract
Compression test of ZGMn13Cr2 Hadfield steel was carried out by Gleeble-3500 thermal sim-ulator at the deformation temperature of 298 K under a constant loading strain rate of 0.1 s-1 and with the compressive deformation of 5%,30%,and 50%,respectively.The effects of compressive deformations on the microstructure evolution and work hardening mechanism of ZGMn13Cr2 Hadfield steel were analyzed by optical microscope,vickers micro-hardness machine,transmission electron microscopy and X-ray dif-fraction.The test results show that a large number of deformation bands appeared in the grains of com-pressed high manganese steels.The deformation bands intersected,tangled and isolated with each other. A great deal of high density dislocation was entangled into dislocation cells or dislocation walls with the compression amount of 5%.Deformation twins appeared in the matrix when the compression amount was30%.With the increasing of compressive deformation,the amount and volume fraction of the twins in-creased gradually.When the compression amount was 50%,the micro-hardness of water-quenched high manganese steel increased by 125% compared with the initial state,showing HV560.8.Meanwhile,XRD results show that the matrix structure remained austenite and with a bit of carbide,but no deformation-in-duced martensites were founded in these deformed samples.With the increasing of compressive deforma-tion,work hardening mechanisms of Hadfield steel changed from dislocation strengthening into mainly rel-ying on deformation twin supplemented by dislocation and stacking fault mechanisms.关键词
高锰钢/加工硬化机理/压缩变形量/组织/性能Key words
Hadfield steel/work-hardening mechanism/compression amounts/microstructure/prop-erties分类
矿业与冶金引用本文复制引用
张福全,何翠,周惦武..高锰钢形变过程中加工硬化机理的研究∗[J].湖南大学学报（自然科学版）,2016,43(12):11-16,6.基金项目
湖南省战略性新兴产业科技攻关项目(湘财企指(2014)66号) （湘财企指(2014）
