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设计了一种用廉价的硼元素部分(或全部)取代普通高速钢轧辊中价格昂贵的合金元素的轧辊。借助光学显微镜(OM)、X射线衍射(XRD)、扫描电镜(SEM)和透射电镜(TEM)等方法对高硼高速钢轧辊铸态组织进行研究。结果表明:高速钢轧辊铸态组织主要由马氏体基体和少量的残余奥氏体以及M23(B,C)6,M3(B0.7C0.3)和(W,Mo)2(B,C)碳硼化合物组成,基体显微硬度达到820～950 HV,轧辊的铸态硬度大于64 HRC。
A roll was designed to replace some or all of the expensive alloying elements in conventional high speed steel rolls with cheap boron. The as-cast microstructure of high boron steel high speed steel roll was studied by optical microscope (OM), X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM) The results show that the as-cast microstructure of high speed steel roll mainly consists of martensite matrix and a small amount of retained austenite, as well as M23 (B, C) 6, M3 (B0.7C0.3) and (W, Mo) 2 ) Boron compounds, the microhardness of the substrate reaches 820 ~ 950 HV, the hardness of the roll cast is greater than 64 HRC.