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淬火处理对轧辊用高硼高速钢组织和性能的影响
Effect of Quenching Heat Treatment on Microstructure and Properties of High-Boron High-Speed Steel for Rolls
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- DOI:
- 作者:
- 杨智强 郭红星 吕潍威
YANG Zhiqiang;GUO Hongxing;YU Weiwei
- 作者单位:
- 昆明工业职业技术学院电气学院 云南昆钢重型装备制造集团有限公司
School of Electrical,Kunming Vocational and Technical College of Industry,Anning 650302,China;Yunnan KJSC Heavy Equipment Manufacturing Group Co.,Ltd.,Anning 650302,China
- 关键词:
- 高硼高速钢 淬火温度 硼碳化物 硬度 耐磨性
high boron high speed steel quenching temperature boro-carbide hardness wear resistance
- 摘要:
- 利用光学显微镜、扫描电镜、X射线衍射、硬度计及MM-200磨损试验机,研究了淬火温度对轧辊用高硼高速钢显微组织和性能的影响。结果表明,高硼高速钢的铸态组织由马氏体、铁素体、珠光体和沿晶界呈连续网状分布的共晶硼碳化物组成,共晶硼碳化物主要是M2B和M7(C,B)3;随着淬火温度的升高,基体全部转变成为马氏体,并有二次硼碳化物M23(C,B)6析出;高硼高速钢的硬度和耐磨性随着淬火温度的升高而明显增加,在1150℃淬火时硬度最高、耐磨性最好。
The effect of quenching temperature on microstructure and properties of high boron high-speed steel for roll was studied by optical microscope,scanning electron microscope,X-ray diffraction,hardness tester and MM-200 wear tester.The results show that the microstructure of as-cast high boron high-speed steel is composed of martensite,ferrite,pearlite and eutectic borocarbons distributed in a continuous network along the grain boundary.The eutectic borocarbons are mainly M2 B and M7(C,B)3.With the increase of quenching temperature,the matrix is transformed into martensite,and secondary boron carbide M23(C,B)6 is precipitated.The hardness and wear resistance of high boron high-speed steel increase obviously with the increase of quenching temperature.The hardness and wear resistance are the highest when quenched at 1150℃.