Analysis on residual stress of Q345 steel in laser cladding process

doi:10.13251/j.issn.0254-6051.2020.03.045

Abstract

Abstract:

Aiming at the problems of cracking on surface of the cladding layer due to residual stress, a reasonable experiment was designed to obtain the residual stress value of the workpiece during the cladding and cooling process. Different process routes are compared according to the value of residual stress, the results show that the pre-bending of the workpiece can significantly reduce the residual stress. The temperature field and stress field of the workpiece are simulated by using ANSYS. It can be concluded that longitudinal stress caused by longitudinal plastic distortion of workpiece is the main component of residual stress.

Key words: laser cladding, residual stress, ANSYS simulation, stress field

CLC Number:

TG162.83

Liu Xiaodong, Jiang Honglei, Xie Meng. Analysis on residual stress of Q345 steel in laser cladding process[J]. HTM, 2020, 45(3): 226-230.

References

[1]张英余. 2Cr13不锈钢轴套激光熔覆制造技术与工艺研究[D]. 太原: 中北大学, 2013.
[2]余冬梅. 激光熔覆Stellite6/TiCN复合涂层的组织及性能研究[D]. 兰州: 兰州理工大学, 2014.
[3]陈波涛. 激光表面改性温度场与应力场模拟及实验研究[D]. 武汉: 华中科技大学, 2011.
[4]韩会, 祁文军, 党元晓, 等. 路径设置对304不锈钢激光熔覆温度场及应力应变场的影响[J]. 热加工工艺, 2017, 46(12): 148-152.
Han Hui, Qi Wenjun, Dang Yuanxiao, et al. Effect of path set on laser cladding temperature field and stress and strain field of 304 stainless steel[J]. Hot Working Technology, 2017, 46(12): 148-152.
[5]张干. 平面激光熔覆变形控制的工艺基础研究[D]. 乌鲁木齐: 新疆大学, 2019.
[6]陈天雄, 胡立威, 赵玲, 等. 激光功率对Zr基非晶复合涂层微观组织与耐腐蚀性能的影响[J]. 材料热处理学报, 2020, 41(1): 117-122.
Chen Tianxiong, Hu Liwei, Zhao Ling, et al. Effect of laser power on microstructure and corrosion resistance of Zr based amorphous composite coating[J]. Transactions of Materials and Heat Treatment, 2020, 41(1): 117-122.
[7]安虎平. 特殊平面应力状态下应变法求解主应力公式综述[J]. 自动化与仪器仪表, 2014(7): 181-184.
[8]陆伟. 激光熔覆高速线材轧辊熔覆层开裂问题的研究[D]. 北京: 北京工业大学, 2006.
[9]郝南海, 陆伟, 左铁钏. 激光熔覆过程热力耦合有限元温度场分析[J]. 中国表面工程, 2004(6): 10-14.
Hao Nanhai, Lu Wei, Zuo Tiechuan. Thermal-mechanical coupling finite element analysis of temperature field in laser cladding process[J]. China Surface Engineering, 2004(6): 10-14.
[10]蒋首超, 李国强. 高温下结构钢的材料特性[J]. 钢结构, 1996(2): 49-57+61.
Jiang Shouchao, Li Guoqiang. Material properties of structural steel at elevated temperatures[J]. Steel Construction, 1996(2): 49-57+61.
[11]杨江. Q345/316L异种钢焊接温度场及残余应力的数值模拟[D]. 成都: 西南石油大学, 2017.
[12]顾建强. 激光熔覆残余应力场的数值模拟[D]. 杭州: 浙江工业大学, 2010.
[13]Liu S. Experiment and numerical studies on laser cladding with power injection[D]. Dallas: Southern Methodist University, 2014.
[14]毛志涛, 蒲晓薇, 汪维登, 等. Q345钢激光焊与气体保护焊的焊接变形与残余应力对比[J]. 中国激光, 2016, 43(6): 125-134.
Mao Zhitao, Pu Xiaowei, Wang Weicheng, et al. Comparison of welding deformation and residual stress in Q345 steel thin plate joints induced by laser beam welding and gas metal arc welding[J]. Chinese Journal of Lasers, 2016, 43(6): 125-134.
[15]李国强, 陈凯, 蒋首超, 等. 高温下Q345钢的材料性能试验研究[J]. 建筑结构, 2001(1): 53-55.