作　　者： ; ; ; ; ; ;

机构地区： 中南大学材料科学与工程学院

出　　处： 《材料研究与应用》 2007年第3期191-194,共4页

摘　　要： 采用石墨化退火和等温淬火工艺对可锻铸铁试样处理后,其组织为贝氏体+残余奥氏体+石墨;处理工艺参数不同,残余奥氏体的晶面距离、晶格点阵常数和碳含量均不同;残余奥氏体质量分数为40%的试样的力学性能最好. Samples, which presented three different microstructures by using the graphitization annealing process and normalization process, respectively, were obtained by pouring the inoculated forging cast iron into sand model, and then were isothermally quenched to obtain the austenite-bainite forging cast iron. The contents of the retained austenite in the three different microstructures above and their effects on the mechanical properties were investigated in this paper. The results show that the combination of mechanical properties is the best, with containing 40% retained austenite.

关 键 词： 可锻铸铁 等温淬火 组织 残余奥氏体

领　　域： [金属学及工艺] [一般工业技术] [金属学及工艺]