淬火温度对Fe-B-C铸造合金显微组织和硬度的影响  

The Influence of Quenching Temperature on Microstructure and Hardness of Fe-B-C Casting Alloy

作　　者：符定梅[1] 符寒光[2] 黄黎明[2] 

机构地区：[1]中冶集团建筑研究总院焊接研究所,北京100088 [2]西安交通大学材料科学与工程学院,陕西710049

出　　处：《大型铸锻件》2007年第5期19-22,共4页Heavy Casting and Forging

摘　　要：在水冷淬火条件下，研究了淬火温度对含0．4％C和2．0％B的Fe—B-C铸造合金显微组织和宏观硬度的影响。结果表明，Fe-B—C铸造合金在淬火加热过程中发生奥氏体化。淬火温度低于900℃时，Fe—B—C铸造合金淬火组织由马氏体和少量珠光体组成。超过1050℃后，淬火组织粗大，且出现低硬度奥氏体。Fe—B—C铸造合金在900-1050℃淬火后，都可获得马氏体＋硼化物组成的复合组织，硬度大于55HRC。用这种材料制造的破碎机锤头，使用寿命达到高锰钢的2—3倍。Under the condition of water cooling quenching, the influence of quenching temperature on microscopic structure and macroscopic hardness of Fe-B-C casting alloy which contents 0.4% C and 2.0% B has been studied. Its result is that the Fe-B-C casting alloy has austenized during the quenching heating process. When the temperature is lower than 900 ℃, the quenching structure of Fe-B-C casting alloy is composed of martensite and pearlite; when the temperature is over 1 050 ℃, the quenching structure turns to be gross with low hardness austenite. After 900 - 1 050 ℃ quenching, the Fe-B-C casting alloy can achieve the duplex structure which is composed of martensite and boride as well as more than 55HRC hardness. Furthermore, using this material to manufacture the hammerhead in crusher, its useful life can achieve two times or three times than high manganese steel of it.

关 键 词：Fe—B—C铸造合金 淬火温度 马氏体 硼化物 硬度 

分 类 号：TG156[金属学及工艺—热处理]