WC-Co截齿的材料成分及硬度分析

Analysis on Material Composition and Hardness of WC-Co Cutting Pick

采用扫描电子显微镜(SEM)、X射线光电子能谱仪(XPS)及洛氏硬度计对截齿进行分析,利用截距法计算硬质合金中的WC晶粒尺寸。结果表明:截齿齿头材料为WC-Co基硬质合金,具有高硬度、高韧性。耐磨层材料为铁基合金粉末,相比齿体具有更高的硬度和耐磨性,有效延迟了截齿磨损失效的发生。齿体材料为中碳低合金钢材料,具有较高的强度和良好的韧性。钎焊层材料为Cu-Mn二元钎料,能够有效保证齿体和齿头之间的钎焊质量。

The cutter pick was analyzed by scanning electron microscopy （SEM）, X-ray photoelectron spectrometer （XPS） and rockwell apparatus. Intercept method was applied to calculate WC grain size in cemented carbide. The results show that the material of cutter head is WC-Co based cemented carbide ,which has high hardness and high toughness. The material of wear-resisting layer is Fe-based alloy powder ,which has higher hardness and wear resistance compared with the pick matrix and can effectively delay the occurrence of the wear of cutting pick. The material of pick matrix is medium carbon steel with low alloys, which has higher strength and good toughness. The materal of brazing layer is Cu-Mn based binary solder, which can effectively ensure the brazing quality between pick matrix and cutter head.