原位自生(Ti,V)C堆焊层的耐磨性能

Wear resistance of in-situ(Ti,V)C surfacing layer

为了研究大型往复压缩机的曲轴修复方法,采用激光堆焊技术对合金基体表面进行处理获得原位自生(Ti,V)C堆焊层.对获得的堆焊层进行金相组织观察和硬度试验,分析不同成分下堆焊层硬度和耐磨性能的变化规律.结果表明:随着合金层钒铁含量的增加,(Ti,V)C复合硬质相含量增加且分布均匀,堆焊层表面硬度逐渐增强,耐磨性能提高;当被测堆焊层试件中的钒铁含量为32.6%时,堆焊层硬度值为54.6 HRC,磨损量为0.4367 g,此时堆焊层的力学性能最佳且耐磨性最好.

In order to study the crankshaft repair method for large reciprocating compressor,a laser surfacing technology was used to treat the substrate surface and obtain the in-situ(Ti,V)C surfacing layer.Metallographic and hardness tests were carried out to analyze the hardness and wear resistance of the surfacing layer under different compositions.The results show that the amounts of(Ti,V)C composite hard phase with uniform distribution increases with the V-Fe content in alloy layer.The surface hardness is gradually strengthened,and the wear resistance is improved.When the V-Fe content in the surfacing layer is 32.6%,the surfacing layer hardness is 54.6 HRC,the wear amount is 0.4367 g,and the surfacing layer has the best mechanical properties and wear resistance.