激光与光电子学进展, 2017, 54 (10): 101410, 网络出版: 2017-10-09
基于温度特征的单道激光熔覆翘曲变形 下载: 602次
Warp Deformation in Single-Track Laser Cladding Based on Temperature Characteristics
激光技术 激光熔覆 翘曲变形 数值模拟 单道模型 温度特征 laser technique laser cladding warp deformation numerical simulation single track model temperature characteristics
摘要
针对同步送粉式单层单道激光熔覆过程, 利用已验证的有限元模型和ANSYS软件分析了其温度场特征。依据加热区-脉冲区的分界点和任意时刻基板上表面温度曲线的峰值点, 以两几何平面截取单道熔覆模型, 获得用于翘曲变形分析的截面体。通过分析熔覆层上表面以及基板上、下表面在整个熔覆过程中的应力/应变状态, 发现该截面体模型会依次出现反向、正向弯曲, 熔覆零件在宏观上则表现为朝向激光束的翘曲变形。最后对单道熔覆过程基板翘变的原因进行了归纳总结。
Abstract
The temperature field characteristic of single-layer single-track cladding with synchronous powder feeding is analyzed by using the verified finite element model and the ANSYS software. According to the heating-pulse zone demarcation points and the peak points of the temperature curve on the upper surface of base at any moment, the section body for the warp deformation analysis is obtained by using two geometric planes to intercept the single-track cladding model. By analyzing the stress/strain states of the upper surface of the cladding layer and the upper and lower surfaces of the base, it is found that the reverse and forward bending occur successively on the section body. The cladding part exhibits deformation toward the laser beam macroscopically. Finally, the reasons for the warp deformation in the single-track cladding process are summarized.
宫新勇, 高士友, 咸士玉, 于润祥. 基于温度特征的单道激光熔覆翘曲变形[J]. 激光与光电子学进展, 2017, 54(10): 101410. Gong Xinyong, Gao Shiyou, Xian Shiyu, Yu Runxiang. Warp Deformation in Single-Track Laser Cladding Based on Temperature Characteristics[J]. Laser & Optoelectronics Progress, 2017, 54(10): 101410.