| 等离子弧堆焊铁基熔覆层组织结构与磨损行为 |
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| 引用本文： | 姚海华,周正,贺定勇,赵秋颖,李冉.等离子弧堆焊铁基熔覆层组织结构与磨损行为[J].焊接学报,2014,35(3):76-80. |
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| 作者姓名： | 姚海华 周正 贺定勇 赵秋颖 李冉 |
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| 作者单位： | 1.北京工业大学材料科学与工程学院, 北京 100124 |
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| 基金项目： | 北京工业大学博士科研启动基金资助项目(009000543112534) |
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| 摘 要： | 设计开发了一种铁基(含Cr,Mo,C,B,Si,Mn等元素)多元合金粉末,采用等离子弧堆焊(PTAW)技术在AISI304L不锈钢表面制备相应熔覆层,通过XRD,SEM,EDS及磨粒磨损试验机等对熔覆层微观组织结构和磨损行为等进行表征,并与传统NiCrBSi和NiCrBSi+25%WC粉末的PTAW熔覆层进行了对比研究.结果表明,所设计的铁基合金熔覆层成形良好,基体组织由Fe-Cr固溶体相与γ-Fe相构成,其间包裹着大量弥散分布的富钼硼化物和M23(B,C)6硬质相,对熔覆层组织能够起到有效的支撑和强化作用.铁基熔覆层的宏观硬度平均值高达64.2HRC,其相对耐磨性明显优于NiCrBSi+25%WC熔覆层,并达到NiCrBSi熔覆层的8倍以上.
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| 关 键 词： | 等离子弧堆焊 铁基熔覆层 微观组织结构 磨损行为 |
| 收稿时间： | 2012/12/19 0:00:00 |
Microstructure and wear behavior of Fe-based coating prepared by plasma transferred arc-welding |
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| YAO Haihu,ZHOU Zheng,HE Dingyong,ZHAO Qiuying and LI Ran.Microstructure and wear behavior of Fe-based coating prepared by plasma transferred arc-welding[J].Transactions of The China Welding Institution,2014,35(3):76-80. |
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| Authors: | YAO Haihu ZHOU Zheng HE Dingyong ZHAO Qiuying and LI Ran |
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| Affiliation: | 1.College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China2.Postdoctoral Research Station of Mechanical Engineering, Beijing University of Technology, Beijing 100124, China |
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| Abstract: | A new Fe-based alloy powder was designed to prepare coatings by plasma transferred arc-welding (PTAW) process on AISI304L stainless steel substrate. The microstructure and wear behavior of the relative coating were detected by XRD, SEM and a rubber wheel abrasive testing machine respectively, in comparison with that of the traditional NiCrBSi and NiCrBSi+25% WC coatings. The results show that the matrix of Fe-based coating consists of Fe-Cr solid solution and γ-Fe phase,surrounded by numerous dispersed Mo-rich borides and M23(B,C)6 hard phases,which contribute to support and strengthen the coating organization. The Fe-based coating exhibits high average hardness of 64.2 HRC,and excellent wear resistance which is better of that of the NiCrBSi+25% WC coating and exceeds 8 times of that of the NiCrBSi coating. |
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| Keywords: | plasma transferred arc-welding Fe-based coating microstructure wear behavior |
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