在不添加中间层的基础上,通过调控激光熔覆工艺在低碳钢表面获得均匀、无裂纹、Ti含量超过99％的镀Ti层,并采用数值方法模拟激光熔覆过程,分析了镀Ti层内的温度场和应变场.结合实验和模拟结果、相图和EDS分析,发现熔覆过程中镀Ti层和基体间形成可能由TiFe、共晶金属间化合物(TiFe+β-Ti)和少量α-Ti组成的界面层,该界面层具有本征脆性,极易形成裂纹,且此裂纹无法消除；镀Ti层内裂纹产生的根本原因是在脆性温度区内产生的拉伸应变超过了金属的临界塑形.可通过减少线能量而减少裂纹驱动力,从而消除镀Ti层内的裂纹,获得均匀、无裂纹的镀Ti层.
参考文献
| [1] | Draugelates U,Bouaifi B,Wesling V.Mater Corras,1992;43:166 |
| [2] | Draugelates U,Bouaifl B,Steinberg H.Mater Corros,1993; 44:269 |
| [3] | Steinberg H.PhD Thesis,Technology University of Clausthal,Clausthal,1996 |
| [4] | Chen Z K,Liu M,Zeng D C,Ma W Y.Laser J,2009; 30:55(陈志坤,刘敏,曾德长,马文有.激光杂志,2009; 30:55) |
| [5] | Chen H,Pan C X,Pan L,Tao X L.Heat Treat Met,2002;27:5(陈浩,潘春旭,潘邻,陶锡麒.金属热处理,2002; 27:5) |
| [6] | Ghosh M,Chatterjee S.Mater Sci Eng,2003; A358:152 |
| [7] | Kato H,Abe S,Tomizawa T.J Mater Sci,1997; 32:5225 |
| [8] | Aleman B,Guitterrez I,Urcola J J.Mater Sci Technol,1993; 36:509 |
| [9] | Ghosh M,Kundu S,Chatterjee S,Mishra B.Mater Trans,2005; 36A:1891 |
| [10] | Kundu S,Chatterjee S.Mater Sci Eng,2006; A425:107 |
| [11] | Changqing A,Zangpeng J.J Less Common Mater,1990;162:315 |
| [12] | Kundu S,Ghosh M,Laik A,Bhammurthy K,Kale G B,Chatterjee S.Mater Sci Eng,2005; A407:154 |
| [13] | Kamat G R.Weld J,1988; 67:44 |
| [14] | Tang R Z,Tian R Z.Binary Alloy Phase Diagram and Crystal Structure of Intermediate Phase.Changsha:Center South University Press,2009:551(唐仁政,田荣璋编.二元合金相图及中间相晶体结构.长沙:中南大学出版社,2009:551) |
| [15] | Li W,Zhang R L.J Changchun Univ,1999; 9:12(李文,张瑞林,长春大学学报,1999;9:12) |
| [16] | Jiang S Y,Li S C.Rare Met Mater Eng,2011; 40:36(蒋淑英,李世春,稀有金属材料与工程,2011; 40:36) |
| [17] | Practical Handbook of Engineering Materials Editorial Board.Practical Handbook of Engineering Materials.2nd Ed.,Beijing:Standards Press of China,2002:8(工程材料实用手册编委会.工程材料实用手册(第2版).北京:中国标准出版社,2002:8) |
| [18] | Shi C X,Li H D,Zhou L.Handbook of Materials Science and Engineering.Beijing:Chemical Industry Press,2004:1(师昌绪,李恒德,周廉.材料科学与工程手册.北京:化学工业出版社,2004:1) |
| [19] | Zhu X K,Chao Y J.Comput Struct,2002; 80:967 |
| [20] | Zhou Z F,Zhang W Y.Welding Metallurgy and Metal Welding Characteristics.2nd Ed.,Beijing:Mechanical Industry Press,1988:196(周振丰,张文钺合编,焊接冶金与金属焊接性(第2版).北京:机械工业出版社,1988:196) |
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