基于计算机模拟的激光淬火边缘效应分析研究

Study on Fringe Effect of Laser Quenching Based on Computer Simulation

利用计算机模拟技术对激光淬火进行了温度场模拟,通过实验与模拟结果对比确定了激光淬火中表面经过磨削加工并喷涂了黑色快干漆的GCr15钢对激光光束能量的吸收率。通过利用不同工艺参数进行模拟,得到了在不同激光淬火工艺参数作用下的模拟淬火温度场,从而分析了进端、出端边缘效应对淬火温度场的影响。最后通过反复模拟试验,提出了利用合适的激光淬火工艺参数以及加速的方法实现淬火过程中瞬时最高淬火温度的均匀,进而保证激光淬火硬化层的均匀。

In this paper, laser hardening temperature field simulation is carried out by computer simulation. Through comparison of experiment and simulation results, the laser beam energy absorption rate of laser hardening of the surface after grinding and spraying quick-drying black paint GCr15 steel is determinded. The different laser quenching technological parameters are used to simulate the temperature fields. The results show that the fringe effects of enter-side and outer-side have an important influences on the temperature fields of laser quenching. Finally through repeated simulations, it is proposed that the use of appropriate process parameters of laser hardening, as well as ways to accelerate the scanning velocity in the process of quenching can make the instantaneous highest quenching temperature uniformity, thereby ensure a uniform harden layer of laser hardening.