WC-10%Co激光熔覆涂层的制备及耐磨性能
Preparation and Wear-resistance of WC-10%Co Laser Cladded Layer
摘 要
为了提高WC-Co激光熔覆涂层的性能,采用化学镀法制备了WC-10%Co复合粉体,分别用体视显微镜和扫描电镜对WC-Co激光熔覆涂层的表面和截面形貌进行观察,探讨了激光熔覆工艺参数对涂层显微组织的影响,并进行了磨损性能试验.结果表明:当激光功率在2.0(或2.4) kW,扫描速率为4.1(或8.2) m·min-1,光斑直径为3 mm时,WC-10%Co涂层与基体能形成冶金结合;涂层的耐磨性能得到明显提高.
激光熔覆
化学镀
WC-Co layer
laser cladding
electroless plating
Abstract
WC-10%Co composite powders were prepared by electroless plating to improve the properties of the WC-Co laser cladded layer.The stereoscopic microscope (SM) and scanning electron microscopye (SEM) were used to study the morphology of the WC-10%Co layers cladded by different laser cladding process parameters.The effects of laser cladding processing parameters on the microstructure and properties of the laser cladded layer were discussed.The results show that the metallurgical bonding formed between the WC-10%Co composite layer and the steel substrate when the laser processing parameters were as followes:the laser beam power of 2.0 or 2.4 kW,beam traverse velocity of 4.1 or 8.2 m·min-1 and the beam diameter of 3 mm.The wear resistance of the laser cladded layer is improved greatly.
中图分类号 TG142.1
所属栏目 新材料 新工艺
基金项目 浙江省科技计划资助项目(2008C31040);国家高技术研究发展计划资助项目(2002AA332100)
收稿日期 2007/8/26
修改稿日期 2008/4/27
网络出版日期
作者单位点击查看
备注朱流(1977-),男,湖南邵阳人,讲师,博士.
引用该论文: ZHU Liu,LI Jian. Preparation and Wear-resistance of WC-10%Co Laser Cladded Layer[J]. Materials for mechancial engineering, 2008, 32(8): 26～29
朱流,郦剑. WC-10%Co激光熔覆涂层的制备及耐磨性能[J]. 机械工程材料, 2008, 32(8): 26～29
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参考文献
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【3】李强,雷廷权,张永忠,等.激光熔覆(WC＋W2C)p/Ni基合金复合涂层的微观结构特征[J].材料科学与工艺,2002,10(1):5-10.
【4】Staia M H,Cruz M,Dahore N B.Wear resistance of a laser alloyed A-356 aluminum/WC composite[J].Wear,2001,251:1459-1468.
【5】Cooper K P.Improving the wear resistence by forming hard metal matrix-ceramic composite surface layer[J].Vaccum Sci Tech,1986,4A(6):2857-2859.
【6】Wayne S F,Baldoni J G,Buljian S T.Friction and wear behavior of several hard materials[J].Tribology Transition,1990,33:611-617.
【7】Wu P,Du H M,Chen X L,et al.Influence of WC particle behavior on the wear resistance properties of Ni-WC composite coatings[J].Wear,2004,257:142-147.
【8】CHEN Zhenda,LIM Leong Chew,QIAN Ming.Laser cladding of WC-Ni composite[J].J Materials Processing Technology,1996,62:321-323.
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【11】Huang S W,Samandi M,Brandt M.Abrasive wear performance and microstructure of laser clad WC/Ni layers[J].Wear,2004,256:1095-1105.
【12】朱流,郦剑,凌国平.超细WC-Co硬质合金及其磨损性能研究[J].材料热处理学报,2006,27(3):112-115.
【13】李荣久.陶瓷-金属复合材料[M].北京:冶金工业出版社,1995.
【14】Deng Xin.Double cemented carbide:microstructure-property relationships[M].[s.l.]:ProQuest Information and Leraning Company,2002.
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