灰铸铁奥氏体化过程中的组织演变规律  

Microstructure Evolution of Gray Cast iron During Austenitizing

作　　者：韩亚辉 伍启华 陈荣标 姜爱龙 HAN Yahui;WU Qihua;CHEN Rongbiao;JIANG Ailong(Weichai Power Co.,Ltd.,Weifang 261061,Shandong China)

机构地区：[1]潍柴动力股份有限公司,山东潍坊261061

出　　处：《铸造工程》2024年第S02期38-41,共4页Foundry Engineering

摘　　要：对灰铸铁进行了不同奥氏体化和等温淬火热处理,利用光学显微镜和拉伸试验机对其组织和性能进行分析。结果显示,在奥氏体化温度875~950℃和奥氏体化时间30~120 min范围内,奥氏体晶粒不会发生明显粗化,最大晶粒尺寸约为80μm;石墨的存在影响了奥氏体中碳浓度及等温淬火后的力学性能,通过调控奥氏体化工艺可以达到调控灰铸铁等温淬火性能的目的。In this paper,gray cast iron was treated with different austenitizing and austempering.The microstructure and properties of gray cast iron were analyzed by optical microscope and tensile testing machine.The results show that there was no obvious coarsening of austenite grains and the greatest grain size was about 80μm in the range of austenitizing temperature 875~950℃and austenitizing time 30~120 min.The presence of graphite affected the carbon concentration in austenite and the mechanical properties after austempering.The properties of gray cast iron can be controlled by adjusting the austenitizing process.

关 键 词：奥氏体化 等温淬火 灰铸铁 

分 类 号：TG252[金属学及工艺—铸造]