Q235钢表面熔覆Fe-TiC-TiN等离子熔覆层的性能分析

Analysis of the microstructure of Fe-TiC-TiN cladding layer on Q235 steel surface

采用等离子熔覆技术,以Fe310铁基自熔合金粉+TiC粉末为熔覆材料,在Q235低碳钢表面原位生成Fe-TiC-TiN熔覆层,在TiC添加比例为3%,6%,10%时,采用扫描电镜、X射线衍射实验手段,分析了熔覆层的相组成、微观组织,用显微硬度仪和摩擦磨损试验机测量熔覆层显微硬度和耐磨性能,结果表明:熔覆层与基体之间为冶金结合;随着TiC含量的增加,熔覆层的硬度和耐磨性能提高,当TiC含量为10%时,熔覆层的硬度达到1 643HV0.5,是基体的6.3倍,耐磨性是基体的5.8倍。

In this paper,A Fe-TiC-TiN coating is obtained on the Q235 soft steel used Plasma cladding technology using Fe310 ferrobased self-fused alloy powder+TiC powder as cladding material.At the addition ratio of 3%,6%,and 10%of TiC,the phase composition and microstructure of the cladding layer were analyzed by means of scanning electricity and X-ray diffraction experiments.The microhardness and wear resistance of the cladding layer were measured by microhardness meter and friction wear tester,The results show that the combination between the cladding layer and the matrix is metallurgical;The highest hardness of cladding layer is up to 1 643 HV0.5,is6.3 times of the substrate.The relative wear resistance is 5.8 times of the substrate.