摘要
为了提高60CrMnMo钢表面的耐磨性,采用CO2激光器在60CrMnMo钢表面进行激光合金化WC-B4C-TiC以获得高硬度、耐磨的合金化层。利用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、硬度计分别分析了合金化层显微组织、物相组成与显微硬度,利用轮式磨损试验机测试了其常温下的耐磨性能,并与基材进行比较。结果表明:合金化层与基材呈冶金结合,合金化层组织主要由胞枝晶组成,合金层物相主要有Fe-Cr、B10C、Cr23C6、Ti8C5、W2B。合金化层的最高硬度可达1 300 HV0.3,是基材的5倍左右,耐磨性提高了大约3倍。
In order to improve the wear resistance of 60CrMnMo steel, WC-BFe-TiC were alloyed on 60CrMnMo steel by co2 laser to obtain hight hardness and wear resistance alloying layer. The microstructure , phase, hardness of alloying layer were analyzed by SEM, XRD, hardness tester. The wear resistant tests were performed on a Suga abrasion tester. The results indicate that excellent metallurgical bonding is obtained between alloying laser and substrate. The microstructure of alloying layer is mainly cell crystal. The phases of alloying layer include Fe-Cr, B10C,Cr23C6、Ti8C5,W2B. The highest microhardness of alloying layer is 1 300 HV0.3, which is about 5 times than that of substrate. The wear resistance of alloying layer is improved nearly 3 times than that of substrate.
出处
《应用激光》
CSCD
北大核心
2013年第4期376-380,共5页
Applied Laser
关键词
激光合金化
表面改性
耐磨性
laser alloying
surface modificatiom wear resistance
