激光熔覆碳化钨/钴基合金复合涂层的组织与耐磨性能
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摘要
采用激光熔覆技术在45#钢基材上制备碳化钨/钴基合金复合涂层,借助XRD、SEM以及硬度测试和室温耐磨实验,研究复合涂层的组织和耐磨性能。结果表明,碳化钨/钴基合金复合涂层的组织由固溶体枝晶与枝晶间共晶组织组成,其枝晶间共晶组织的碳化物含量比钴基合金涂层高;与钴基合金涂层相比,碳化钨/钴基合金复合涂层的显微硬度和耐磨性能均明显提高,且磨损失重减少了48%;钴基合金涂层的磨粒磨损机理主要为微观切削,碳化钨/钴基合金复合涂层的磨粒磨损机理主要为挤压剥落。
The tungsten carbide/cobalt-based alloys composite coating was manufactured by laser cladding technology on the 45 steel matrixes.The microstructure and wear-resistant properties of the prepared composite coating were studied by XRD,SEM,hardness test and wear resistance test.It was found that the microstructure of tungsten carbide/cobalt-based alloys composite coating was consisted of solid solution dendrites and interdendritic eutectic structure whose carbide content was higher than that of the cobalt-based alloys coating.Compared with the cobalt-based alloys coating,the microhardness and wear-resistant properties of the composite coating improved obviously,and the wear mass loss reduced by 48%.The feature of abrasive wear in the cobalt-based alloys coating and the tungsten carbide/cobalt-based alloys composite coating was characterized by micro-cutting and debonding respectively.
The tungsten carbide/cobalt-based alloys composite coating was manufactured by laser cladding technology on the 45 steel matrixes.The microstructure and wear-resistant properties of the prepared composite coating were studied by XRD,SEM,hardness test and wear resistance test.It was found that the microstructure of tungsten carbide/cobalt-based alloys composite coating was consisted of solid solution dendrites and interdendritic eutectic structure whose carbide content was higher than that of the cobalt-based alloys coating.Compared with the cobalt-based alloys coating,the microhardness and wear-resistant properties of the composite coating improved obviously,and the wear mass loss reduced by 48%.The feature of abrasive wear in the cobalt-based alloys coating and the tungsten carbide/cobalt-based alloys composite coating was characterized by micro-cutting and debonding respectively.
引文
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[2]XU YANGTAO,XIA TIANDONG,ZHAO WENJUN,et al.Effect of alloying elements on friction and wear performance of novel Co-Al-W superalloys[J].Rare Metal Materials and Engineering,2013,42(1):75-79.徐仰涛,夏天东,赵文军,等.合金元素对新型Co-Al-W合金摩擦磨损性能的影响[J].稀有金属材料与工程,2013,42(1):75-79.
[3]HE YIZHU,SI SONGHAU,XU KUN,et al.Effect of Cr3C2 particles on microstructure and corrosion-wear resistance of laser cladding Co-based alloy coating[J].Chinese Journal of Lasers,2004,31(9):1143-1148.何宜柱,斯松华,徐锟,等.Cr3C2对激光熔覆钴基合金涂层组织与性能的影响[J].中国激光,2004,31(9):1143-1148.
[4]QU SHENGGUAN,XIONG ZHIHUA,LAI FUQIANG,et al.Friction and wear characteristics of plasma surfacing satellite alloys at elevated temperatures[J].Tribology,2016,36(3):362-370.屈盛官,熊志华,赖福强,等.等离子堆焊Stellite合金高温摩擦磨损特性研究[J].摩擦学学报,2016,36(3):362-370.
[5]HUANG XINBO,JIA JIANYUAN,LIN HUACHUN,et al.Corrosion resistance and wear resistance of VFS cobalt based alloy-tungsten carbide composite coating[J].Journal of Materials Engineering,2004(8):36-43.黄新波,贾建援,林华春,等.钴基合金-碳化钨复合涂层耐磨抗蚀性能研究[J].材料工程,2004(8):36-43.
[6]HUANG XINBO,JIA JIANYUAN,LIN HUACHUN,et al.Study on wear resistance of VFS cobalt based alloy tungsten carbide composite coating[J].Chinese Journal of Mechanical Engineering,2004,40(6):71-74.黄新波,贾建援,林华春,等.钴基合金-碳化钨复合涂层材料耐磨性能的研究[J].机械工程学报,2004,40(6):71-74.
[7]HUANG XINBO,JIA JIANYUAN,LIN HUACHUN.Corrosion resistance of Co based alloy-tungsten carbide composite coating[J].Materials for Mechanical Engineering,2003,27(11):49-51.黄新波,贾建援,林华春.钴基合金-碳化钨复合涂层的耐蚀性能[J].机械工程材料,2003,27(11):49-51.
[8]PAN LIN,GAO WANZHEN,PAN CHUNXU,et al.Influence of WC on microstructure,compositions of micro-region and microhardness of laser cladding cobaltbased alloy layer[J].Transactions of Materials and Heat Treatment,2010,31(10):129-135.潘邻,高万振,潘春旭,等.碳化钨对钴基合金激光熔覆复合涂层组织微区成分及硬度的影响[J].材料热处理学报,2010,31(10):129-135.
[9]GU FENGLIN.Effect of SiC,WC on microstructure and properties of Co-based alloy coating by plasma transferred are welding[D].Maanshan:Anhui University of Technology,2014:42-45.顾凤麟.SiC,WC对钴基合金等离子喷焊层组织和性能的影响[D].马鞍山:安徽工业大学,2014:42-45.
[10]FU HANGUANG.500 Questions of Wear Resistant Materials[M].Beijing:China Machine Press,2011:8-11.符寒光.耐磨材料500问[M].北京:机械工业出版社,2011:8-11.
[11]WEN SHIZHU,HUANG PING.Principles of Tribology(Fourth Edition)[M].4th ed.Beijing:Tsinghua University Press,2012:228-291.温诗铸,黄平.摩擦学原理[M].4版.北京:清华大学出版社,2012:228-291.
[12]HE BO,NIE QINGWU,ZHANG HONGYU,et al.Effects of solution treatment on microstructure and wear-resistant properties of CoCrW alloys[J].Acta Metallurgica Sinica,2016,52(4):484-490.何波,聂庆武,张洪宇,等.固溶处理对CoCrW合金组织及耐磨性能的影响[J].金属学报,2016,52(4):484-490.