摘要
为了提高材料耐磨性,以Cr_3C_2和0.47Cr-0.50Mi-0.03Si合金粉末为原料,利用激光熔覆制备工艺,在A3钢表面制得了Cr_7C_3硬质相增强Cr-Ni-Si金属硅化物复合材料涂层;利用光学显微镜、扫描电子显微镜、X射线衍射仪、能谱仪与电子探针等分析了涂层的显微组织,并在室温干滑动条件下测试其耐磨性能。结果表明,硬质颗粒相Cr_7C_3的加入,显著提高了Cr-Ni-Si金属硅化物涂层的硬度,涂层具有良好的室温耐磨性能。
A wear resistant Cr7 C3 reinforced Cr-Ni-Si ternary metal sihcide composite coating was fabricated on a substrate of A3 mild steel by means of laser cladding with Cr3C2 and 0. 47Cr-0. 50Ni-0. 03Si alloy powder as the precursor material, The microstructure and composition of the coating were investigated by means of optical microscopy, scanning electron microscopy, X- ray diffraction, energy dispersive spectrometer and electron probe micro-analyzer. Then the wear resistance of the coating was tested under dry sliding wear condition at room temperature. Results indicated that, microhardness of the Cr-Ni-Si coating was evidently improved because of the introduction of Cr7 C3. The laser clad Cr7 C3 reinforced Cr-Ni-Si ternary metal silicide composite coating shows excellent wear resistance under dry sliding wear test conditions.
出处
《激光技术》
CAS
CSCD
北大核心
2011年第4期457-460,467,共5页
Laser Technology
基金
国家自然科学基金资助项目(50625413)
