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滚珠丝杠在感应加热过程中的温度分布对淬火后的组织性能具有至关重要的影响,利用MSC.Marc软件建立55Cr Mo钢感应加热过程的有限元模型并研究了感应线圈移动速度、电流频率、电流密度等因素对加热后温度场及相变的影响,采用RSM对试验结果进行回归分析,得到齿顶和沟底完全奥氏体化深度、丝杠表面最高温度的拟合方程及曲面模型,从而优化出最佳感应淬火工艺参数。优化结果表明,当线圈移动速度为240 mm/min,频率约7000 Hz,密度约1.91 e~7A/m~2时,齿顶完全奥氏体化深度约5.10 mm,沟底完全奥氏体化深度约2.20 mm,表面最高温度约930℃,淬火后能得到相应深度的硬化层。
The temperature distribution of the ball screw during induction heating is crucial to the microstructure and properties of the quenched steel. The finite element model of induction heating of 55Cr Mo steel was established by using MSC.Marc software and the effects of induction coil moving velocity, current frequency , Current density and other factors on the temperature field and phase transition after heating, using RSM regression analysis of the test results, the tip and bottom of the groove fully austenitized depth, the maximum screw surface temperature fitting equation and the surface model , So as to optimize the optimal induction hardening process parameters. The optimization results show that when the moving speed of the coil is 240 mm / min, the frequency is about 7000 Hz and the density is about 1.91 e ~ 7A / m ~ 2, the complete austenitization depth of the tooth top is about 5.10 mm. The groove bottom is fully austenitized Depth of about 2.20 mm, the maximum surface temperature of about 930 ℃, after quenching can get the corresponding depth of the hardened layer.