石墨加入量对激光熔覆原位合成TiC/镍基涂层裂纹敏感性的影响
Influence of Carbon Content on Crack Sensitivity of TiC/Ni Coatings Prepared by In-situ Fabrication through Laser Cladding
摘 要
为降低激光熔覆原位合成TiC/镍基涂层的裂纹敏感性,利用光学显微镜、扫描电镜、X射线衍射仪等研究了石墨加入量对涂层裂纹敏感性的影响.结果表明:通过降低混合粉末中石墨加入量从而减少涂层的碳含量,可以改善涂层组织,降低涂层的裂纹敏感性;当加入的石墨粉与钛粉的质量比为1∶5时,可获得无裂纹涂层.
原位合成
裂纹敏感性
镍基涂层
laser cladding
in-situ fabrication
crack sensitivity
Ni base coating
Abstract
In order to decrease the crack sensitivity of TiC/Ni coatings prepared by in-situ fabrication through laser cladding,the effect of carbon content on crack senstivity of the coating was studied by optical microscope,scanning electronic microscope and X ray diffraction.The results indicated that the microstructure of the coatings can be improved and the crack sensitivity of coatings can be reduced through decreasing carbon content in the coatings.When the mass ratio of graphite and titanium powders was 1∶5,coatings without cracks were obtained.
中图分类号 TF124.3
所属栏目 材料性能及其应用
基金项目 国家“863”计划资助项目(2006AA09A104)
收稿日期 2008/1/9
修改稿日期 2008/11/14
网络出版日期
作者单位点击查看
备注赫庆坤(1971-),男,山东茌平人,博士研究生.
引用该论文: HE Qing-kun,WANG Yong,TAO De-can,MENG Fan-gang,CHENG Yi-yuan. Influence of Carbon Content on Crack Sensitivity of TiC/Ni Coatings Prepared by In-situ Fabrication through Laser Cladding[J]. Materials for mechancial engineering, 2009, 33(2): 67～70
赫庆坤,王勇,陶德灿,孟凡刚,程义远. 石墨加入量对激光熔覆原位合成TiC/镍基涂层裂纹敏感性的影响[J]. 机械工程材料, 2009, 33(2): 67～70
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参考文献
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【2】Schwendner K I,Banerjee R,Collins P C,et al.Direct laser deposition of alloys from elemental powder blends[J].Scripta Materialia,2001,45:1123-1129.
【3】赵亚凡,陈传忠.激光熔覆金属陶瓷涂层开裂的机理及防止措施[J].激光技术,2006,30(1):16-19,22.
【4】时海芳,胡世菊,侯柏松,等.25SiMnMoV钢粒状贝氏体回火过程研究[J].煤矿机械,2000(1):28-30.
【5】ZHONG Minlin,LIU Wenjin.Comparative research on cracking tendency in powder feeding laser cladding sttellite and NiCrSiB alloys[J].Chinese Journal of Lasers,2002,29(11):1032-1036.
【6】CHEN Jing,YANG Haiou,LI Yanmin,et al.The research on two kinds of cracking behavior and mechanism of cladding in rapid laser forming process[J].Applied Lasers,2002,22(3):300-304.
【7】孙一唐.工具钢及其热处理[M].北京:机械工业出版社,1986:65-69.
【8】Liu Xiubo,Yu Gang,Pang Ming.Dissimilar autogenous full penetration welding of superalloy K418 and 42CrMo steel by a high power CW Nd: YAG[J].Laser Applied Surface Science,2007,253(17):7281-7289.
【9】宋武林,朱蓓蒂,甘翠华,等.激光熔覆层结晶方向对覆层裂纹方向和开裂敏感性的影响[J].中国激光,1995,22(4):309-312.
【10】董建新,张麦仓,曾燕屏.新型Ni-Cr基GH648合金成分对热力学平衡相析出行为的影响[J].稀有金属材料与工程,2005,34(1):51-55.
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