加热温度对低合金耐磨铸铁中碳化物形态和冲击疲劳性能的影响  

Influence of Heating Temperature on Morphology of Eutectic Carbide and Impact Fatigue Property of Low Alloy Wear Resistant Cast Iron

作　　者：李大军[1] 李博 关蕾 

机构地区：[1]秦皇岛职业技术学院机电系,河北秦皇岛066100 [2]国投曹妃甸港口股份公司,河北唐山063200

出　　处：《热加工工艺》2009年第10期170-171,共2页Hot Working Technology

摘　　要：采用金相显微镜、扫描电镜及冲击疲劳试验机研究了加热温度对低合金耐磨铸铁中共晶碳化物形态和冲击疲劳性能的影响。结果表明:随加热温度的升高,耐磨铸铁中的网状共晶碳化物陆续溶断,块状碳化物逐渐增多,当铸铁在960℃保温3h空冷后,可获得较高的冲击疲劳性能。The influence of heating temperature on morphology of eutectic carbide and impact fatigue property of low alloy wear resistant cast iron were studied by OM, SEM and impact fatigue tester. The results show that the network eutectic carbides are broken and blocks carbides are increased gradually with increasing of heating temperature, and the cast iron can obtain higher impact fatigue property when normalizing at 950℃ for 3 h.

关 键 词：低合金耐磨铸铁 加热温度 碳化物 冲击疲劳性 

分 类 号：TG156.21[金属学及工艺—热处理]