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V₂O₅和工艺参数对镍基合金激光熔覆层裂纹敏感性的影响

Effect of laser cladding techniques and component of alloy on the cracking susceptibility of V₂O₅ /NiCrBSiC coatings

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【Author】 WANG Dong-sheng 1 ,YU Zhi-qing 2 ,CHAO Ming-ju 1 ,ZHOU Xiao-wei 3 LIANG Er-jun 1 1.Dept.of Physics&Lab.of Materials Physics of Ministry of Education,Zhengzhou University,Zhengzhou450052,China;2.Dept.of Transportation Management,Henan Public Security Academy,Zhengzhou450002,China;3Dept.of Physics,Zhengzhou Techers’College,Zhengzhou450052,China

【机构】郑州大学物理工程学院教育部材料物理重点实验室；河南公安高等专科学校交通管理系；郑州师专物理系；郑州大学物理工程学院教育部材料物理重点实验室郑州450052；郑州450002；郑州450052；郑州450044；

【摘要】在激光熔覆NiCrBSiC自熔合金粉末中添加不同含量的V₂O₅,通过改变激光功率、扫描速度、预涂厚度,进行了不同工艺条件下的单道及多道搭接试验.实验表明,V₂O₅的含量、激光熔覆的工艺均对熔覆层的形貌、组织、性能以及降低裂纹的敏感性有明显的影响.通过各个试验样品的对比分析,探讨了工艺和粉末成分对熔覆层性能及裂纹敏感性的影响,分析了多道搭接裂纹的分布规律及影响因素。更多还原

【Abstract】 The experiment of laser-clad NiCrBSiC alloy powder doped with V₂O₅ is performed.Under different laser power,scanning velocity and thickness of pastes,the single and multi-pass are carried out.The experiment results indicate that the amount of V₂O₅ and the laser cladding techniques have a consider-ably effect on the feature,microstructure,performance and cracking susceptibility of laser-clad V₂O₅ /NiCrBSiC coatings.In this work,the effects of component of alloy and processing techniques on the cracking susceptibility and other properties of the coatings,are studied.The crack’s distribution rule of multi-track cladding coating is also analyzed.更多还原