作　　者： (杨晓彩）; (徐海强）; (王杨）; (刘燕霞）; (陈敏）;

机构地区： 河北工业职业技术学院材料工程系,河北石家庄050000

出　　处： 《山东冶金》 2017年第4期41-43,共3页

摘　　要： 研究了不同等温退火工艺下GCr15钢碳化物的球化效果,采用扫描电镜对显微组织进行分析。结果表明:随温度升高碳化物颗粒变得细小弥散,当加热温度上升至800℃时奥氏体化均匀程度过高,容易形核长大成片状碳化物;随等温加热时间延长碳化物颗粒能独立形核成球状长大,甚至部分颗粒开始回熔长大。GCr15钢的最佳退火工艺参数为:加热温度780℃,加热时间5 h,等温温度700℃,等温时间3 h。 The spheroidizing effect of GCrl5 steel was studied and the microstructure was analyzed by SEM under different isothermal an- nealing. The resuhs show that the carbide particles become smaller and smaller which is easy to form and grow into lamellar carbide with the increasing of the temperature. When the heating temperature is increased to 800℃, the carbide particles can grow into spherical shape inde- pendently, and even some of the particles begin to grow up with the increasing of the heating time. The optimum process of GCr15 steel is heating temperature of 780℃, keep heating time for 5 h, isothermal temperature of 700℃, isothermal time for 3 h.

关 键 词： 钢 等温退火 显微组织 碳化物 球化