激光熔覆纳米镍镀层的组织和性能
Microstructure and Properties of Nanocrystalline Ni Coatings after Laser Cladding
摘 要
采用自制的喷射电镀设备在低碳钢基体上制备了纳米晶镍镀层,并对镍镀层进行了激光熔覆处理;研究了平均脉冲电流密度对镀层微观组织的影响及激光熔覆处理对纳米镍镀层形貌、显微硬度和结合强度的影响.结果表明:随着脉冲电流的提高,纳米镍镀层的表面平整性得到提高;经过激光熔覆处理后镀层的致密度增大,显微硬度从597.5 HV提高到658.2 HV,结合强度从10.2 MPa提高到19.5 MPa.
喷射电镀
激光熔覆
显微硬度
nanocrystalline Ni coating
jet electroplating
laser cladding
microhardness
Abstract
Nanocrystalline nickel coatings were prepared on low-carbon steel matrix by the self-manufactured jet electroplating equipment.Then the coatings were processed by laser cladding.The effect of average pulse current density on the microstructure of nanocrystalline Ni coatings was studied,and the effect of laser cladding on the morphology,microhardness and bonding strength of nanocrystalline Ni coatings was also investigated.The results show that the surface planarization of the nanocrystalline Ni coating was improved with the increase of pulse current.The coating treated by laser cladding had high density,the microhardness increased from 597.5 HV to 658.2 HV,the bonding strength increased from 10.2 MPa to 19.5 MPa.
中图分类号 TG153.4
所属栏目 材料性能及其应用
基金项目
收稿日期 2009/3/29
修改稿日期 2009/10/18
网络出版日期
作者单位点击查看
备注陈劲松(1977-),男,安徽肥东人,讲师,博士.
引用该论文: CHEN Jin-song,HUANG Yin-hui,TIAN Zong-jun,QIAO Bin,YANG Jian-ming. Microstructure and Properties of Nanocrystalline Ni Coatings after Laser Cladding[J]. Materials for mechancial engineering, 2010, 34(4): 69～71
陈劲松,黄因慧,田宗军,乔斌,杨建明. 激光熔覆纳米镍镀层的组织和性能[J]. 机械工程材料, 2010, 34(4): 69～71
被引情况:
【1】王耀华,高清振,张晓南,李启峰, "Fe-Al/TiC激光熔覆层的高温摩擦磨损和氧化性能",机械工程材料 35, 39-42(2011)
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参考文献
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【3】LWASZKO J.Surface remelting treatment of plasma-sprayed Al2O3+13.2wt%TiO2 coatings[J].Surface and Coatings Technology,2006,201:3443-3451.
【4】刘荣祥,郭立新,雷廷权,等.激光重熔NiCrBSi+TiN复合涂层及界面组织[J].中国激光,2005,32(2):292-296.
【5】王凤娥.电沉积镍基合金的研究进展[J].稀有金属,1998,22(5):375-379.
【6】熊毅,荆天辅,乔桂英,等.脉冲喷射电沉积镍工艺的研究[J].电镀与涂饰,2000,19(6):11-15.
【7】WANG Ai-hua.Laser modification of plasma spray Al2O3-13%TiO2 coating on low carbon steel[J].Surface and Coatings Technology,1992,52:141-144.
【8】王东生,黄因慧,田宗军,等.激光重熔对喷射电沉积纳米镍涂层组织与性能的影响[J].中国激光,2008,35(1):142-144.
【9】张魁武.国外激光熔覆材料、工艺和组织性能的研究[J].金属热处理,2002,27(6):1-8.
【10】洪永昌,夏正文.不同基体和涂层激光熔覆表面改性的研究现状与进展[J].电焊机,2005,11(11):35-39.
【11】李志忠.激光表面强化[M].北京:机械工业出版社,1992.
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