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强碳化物形成元素在激光原位合成颗粒增强涂层中的作用

Influence of Strong-Carbide-Formation Elements on Laser Producing Fe-Matrix Composite Reinforced by In-Situ Synthesized Particles

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摘要

不同的强碳化物形成元素对激光制备原位合成颗粒增强复合涂层具有不同的作用。向激光合金化或激光熔覆形成的高碳当量熔池中添加能与碳形成间隙相的某些强碳化物形成元素,有利于获得与基材冶金结合的、具有原位合成特征的复合碳化物颗粒增强的高耐磨复合涂层,并且它们对于增强颗粒的形核与生长发挥着各自不同的作用,其中Ti是最重要的形核元素。最终确定了强碳化物形成元素(Ti+Zr+Mo+WC)复合添加的优化方案。采用优化方案在钢和铸铁表面制备出激光原位合成颗粒增强复合涂层。这种涂层在工业生产中表现出优异的摩擦学特性,而这种技术思路在镍基表面也得到了实现。

Abstract

Adding carbide-formation elements into the high-carbon-equivalent FeCSiB molten pool induced by laser cladding or laser alloying is favorable of the formation of high wearable metal matrix composite coating with multiple carbide particles reinforcement by in-situ synthesizing and with strong metallurgical bond to the substrates. They play different roles in promoting the nucleation and growth of the reinforcement carbides, among which Ti is the most important element for particle nucleation. The adding combination of the strong carbide formation element (Ti+Zr+Mo+WC) was optimized. Tribological tests and application checks in typical key parts approve that the laser produced composite coatings reinforced by in-situ particles demonstrated excellent wear resistance and coupling capability. The above concept on producing in-situ synthesized particles reinforced composite coatings has been successfully used in laser surface strengthening of nickel-base alloy.

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中图分类号:TN249;TG665

所属栏目:材料与薄膜

基金项目:国家科技型中小企业技术创新基金(02C62213200581)和江苏省科技攻关项目(BE2002036)资助项目。

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网络出版日期:0001-01-01

作者单位    点击查看

马明星:清华大学机械工程系先进成形制造教育部重点实验室, 北京 100084
刘文今:清华大学机械工程系先进成形制造教育部重点实验室, 北京 100084
钟敏霖:清华大学机械工程系先进成形制造教育部重点实验室, 北京 100084
吴朝锋:清华大学机械工程系先进成形制造教育部重点实验室, 北京 100084
张伟明:清华大学机械工程系先进成形制造教育部重点实验室, 北京 100084
张红军:清华大学机械工程系先进成形制造教育部重点实验室, 北京 100084

联系人作者:马明星(mamingxing00@mails.tsinghua.edu.cn)

备注:马明星(1977-),男,山东单县人, 博士研究生,主要从事激光表面强化方面的研究。

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引用该论文

马明星,刘文今,钟敏霖,吴朝锋,张伟明,张红军. Influence of Strong-Carbide-Formation Elements on Laser Producing Fe-Matrix Composite Reinforced by In-Situ Synthesized Particles[J]. Chinese Journal of Lasers, 2007, 34(s1): 51-55

马明星,刘文今,钟敏霖,吴朝锋,张伟明,张红军. 强碳化物形成元素在激光原位合成颗粒增强涂层中的作用[J]. 中国激光, 2007, 34(s1): 51-55

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