程建,孙琨,马利锋,方亮

• 1:西安交通大学金属材料强度国家重点实验室
• 2:西安交通大学航天学院

摘要(Abstract)：

依据有限元建模思想,采用高斯表面热源,同时考虑相变潜热与温度的关系,应用ABAQUS软件建立了Q235钢基体上激光重熔合成Fe-Al涂层的温度场和应力场计算模型,研究了激光功率和扫描速度对温度场和应力场的影响。结果表明,提高激光功率对增大热影响区深度效果不大,反而会形成较大的熔池而使重熔表面粗糙;与激光功率相比,扫描速度对温度场影响较小;涂层与基体合金化区沿着激光扫描方向的拉应力远大于垂直扫描方向的拉应力;结合界面处的残余应力与扫描速度成正比,与激光功率成反比,且扫描速度对残余应力的影响较激光功率显著。实验结果较好地验证了模拟结果,表明所建立的温度场和应力场计算模型是正确和可靠的。

关键词(KeyWords)： ABAQUS;激光重熔;温度场;应力场;显微组织

Abstract:

Keywords:

基金项目(Foundation): 中央高校基本科研业务费专项资金(xjj2013111);; 陕西省自然科学基金(2014JM6219)

作者(Author): 程建,孙琨,马利锋,方亮

DOI: 10.13289/j.issn.1009-6264.2014.08.038

参考文献(References)：

• [1]Stoloff N S.Iron aluminides:present status and future prospects[J].Materials Science and Engineering A,1998,258(1):1-14.
• [2]王洪涛,杨冠军,李长久,等.冷喷涂FeAl金属间化合物涂层的高温磨损性能研究[J].中国材料进展,2009,28(2):61-64.WANG Hong-tao,YANG Guan-jun,LI Chang-jiu,et al.Study of high-temperature abrasive wear performance of cold-sprayed FeAl intermetallic compound coating[J].Materials China,2009,28(2):61-64.
• [3]Guy A,Ghislain M,Francoise H,et al.Modification of thermal barrier coating architecture by in situ laser remelting[J].Journal of the European Ceramic Society,2006,26(1):3583-3597.
• [4]Cui C,Ye F X,Song G R.Laser surface remelting of Fe-based alloy coatings deposited by HVOF[J].Surface&Coatings Technology,2012,206(10):2388-2395.
• [5]Li J F,Li L,Stott F H.A three-dimensional numerical model for a convection-diffusion phase change process during laser melting of ceramic materials[J].International Journal of Heat and Mass Transfer 2004,47(7):5523-5539.
• [6]Palumbo G,Pinto S,Tricarico L.Numerical finite element investigation on laser cladding treatment of ring geometries[J].Journal of Materials Processing Technology,2004,155(4):1443-1450.
• [7]程广萍,李明喜,何宜柱,等.激光熔覆层温度场和应力场的数值模拟[J].计算机应用,2009,24(4):49-54.CHENG Guang-ping,LI Ming-xi,HE Yi-zhu,et al.Numerical simulation of temperature field and stress field in laser clad coating[J].Journal of Computer Applications,2009,24(4):49-54.
• [8]田宗军,王东生,黄因慧,等.45钢表面激光重熔温度场数值模拟[J].材料热处理学报,2008,29(6):173-178.TIAN Zong-jun,WANG Dong-sheng,HUANG Yin-hui,et al.Numerical simulation of temperature field of laser remelting on 45 steel[J].Transactions of Materials and Heat Treatment,2008,29(6):173-178.
• [9]章文献,史玉升,李佳桂,等.选区激光熔化成形温度场模拟与工艺优化[J].应用激光,2008,28(3):185-189.ZHANG Wen-xian,SHI Yu-sheng,LI Jia-gui,et al.Simulation of temperature field for optimization of processing parameters of selective laser melting metal powders[J].Applied Laser,2008,28(3):185-189.
• [10]郑振太,单平,罗震,等.CO2气体保护焊温度场的数值模拟[J].天津大学学报,2007,40(2):234-238.ZHENG Zhen-tai,SHAN Ping,LUO Zhen,et al.Numerical simulation of CO2arc welding temperature field[J].Journal of Tianjin University,2007,40(2):234-238.
• [11]贾文鹏,林鑫,陈静,等.空心叶片激光快速成形过程的温度/应力场数值模拟[J].中国激光,2007,34(9):1308-1312.JIA Wen-peng,LIN Xin,CHEN Jing,et al.Temperature/Stress field numerical simulation of hollow blade produced by laser rapid forming[J].Chinese Journal of Lasers,2007,34(9):1308-1312.
• [12]Hatch J E.Aluminum Properties and Physical Metallurgy[M].America:Metals Park American Society for Metals,1984.
• [13]马庆芳,方荣生,项立成,等.实用热物理性质手册[M].北京:中国农业机械出版社,1986.
• [14]Lusquios F,Comesaa R,Riveiro A,et al.Fibre laser micro-cladding of Co-based alloys on stainless steel[J].Surface&Coatings Technology,2009,203(1):1933-1940.

文章评论(Comment)：