应用激光, 2019, 39 (3): 482, 网络出版: 2019-08-07
27SiMn钢表面激光淬火数值模拟及实验验证
Numerical Simulation and Experimental Verification of Laser Quenching on 27SiMn Steel Surface
激光淬火 27SiMn钢 温度场仿真 硬度 显微组织 laser quenching 27SiMn steel temperature field simulation hardness microstructure
摘要
为了研究激光功率对液压支架立柱母材27SiMn钢激光淬火处理的影响, 利用ANSYS有限元软件模拟了激光淬火的过程, 得到了不同功率下温度场分布。在27SiMn钢表面进行了与数值模拟相同条件下的激光淬火实验, 并分析了宏观形貌、显微组织和显微硬度。结果表明, 数值模拟和实验所得到的淬火区深度基本一致。数值模拟中, 工件峰值温度随激光功率增大而增大, 整个温度场截面呈半月牙状; 实验所得到的硬化层形貌与仿真结果类似, 呈半月牙状。淬火后基体表层形成了细小致密的马氏体组织, 且硬化层的硬度比基体增加了2.5倍以上, 并且随着激光功率增加, 硬化层的深度和硬度也逐渐增加。
Abstract
In order to study the influence of laser power on laser quenching of 27SiMn steel for hydraulic support post, ANSYS finite element software was used to simulate the process of laser quenching, and the temperature field distribution under different power was obtained. The laser quenching experiment on 27SiMn steel was carried out under the same conditions as the numerical simulation, and the macrostructure, microstructure and microhardness were analyzed. The results show that the depth of quenching zone obtained by numerical simulation and experiment is basically the same. In the numerical simulation, the peak temperature of the workpiece increases with the increase of the laser power, and the cross section of the whole temperature field is semilunar. The morphology of the hardened layer obtained by the experiment is similar to the simulation result and is semilunar. After quenching, fine and dense martensite microstructure is formed on the surface of the matrix, and the hardness of the hardened layer is increased by more than 2.5 times than that of the matrix, and the depth and hardness of the hardened layer gradually increased with the increase of laser power.
郭卫, 张汉杰, 柴蓉霞. 27SiMn钢表面激光淬火数值模拟及实验验证[J]. 应用激光, 2019, 39(3): 482. Guo Wei, Zhang Hanjie, Chai Rongxia. Numerical Simulation and Experimental Verification of Laser Quenching on 27SiMn Steel Surface[J]. APPLIED LASER, 2019, 39(3): 482.