等离子堆焊涂层成分优化及耐磨性能研究

Coat Components Optimization and Wearability for Plasma Transferred Arc Processing

摘要: 为了提高材料表面的耐磨性,在Ni60基体合金粉末中加入了铬、锰、钨粉末,配置了一种新的合金粉末,并在Q235钢板上进行了等离子堆焊试验.以铬、锰、钨粉末的含量为因子,以硬度为指标,采用三水平三因子正交表进行统计分析,得到了较优粉末配方为：ω(Cr)=10%,ω(Mn)=4%,ω(W)=7%,余为Ni60基体合金粉末.磨损试验结果表明：Q235钢板表面的耐磨性得到了提高,且随堆焊层硬度的增加,其耐磨性增强.

Abstract: To improve the wearability of materials,a new alloy powder was produced and weld-surfaced by plasma transferred arc(PTA) processing on Q235 steel specimens.The powder was made on the matrix of Ni-based powder(Ni60) with Cr,Mn and W additions.The orthogonal experiment method was used to find the best composition with the index of “hardness” and the factors of “proportions of Cr,Mn and W”.The best composition was ω(Cr)=10%,ω(Mn)=4%,ω(W)=7%,and with the rest of Ni-based powder.The wear testing results indicated that the wearability of welded coat was improved.With increase of the hardness,the coat was more wearable.