16Mn模具钢电磁热止裂与激光熔覆再修复的数值模拟研究
发布时间：2019-07-05 05:55
【摘要】：利用ANSYS对脉冲放电电磁热止裂温度场和应力场进行模拟,然后对电磁热止裂后的16Mn钢试样熔覆Ni45合金粉末的表面温度场瞬时变化进行模拟。结果表明,在8000 V高压脉冲电压下,裂纹尖端的温度可达1500℃以上,裂尖部分熔化,进而使裂尖钝化,脉冲放电后1000 s时构件的温度基本接近室温。脉冲放电瞬间接近裂尖处的残余应力较大,而远离裂尖处的压应力较小。激光熔覆过程中垂直于激光扫描方向存在着一定的温度梯度。
[Abstract]:The temperature field and stress field of pulse discharge electromagnetic thermal crack arrest were simulated by ANSYS, and then the instantaneous variation of surface temperature field of 16Mn steel sample coated with Ni45 alloy powder after electromagnetic thermal crack arrest was simulated. The results show that at 8000 V high voltage pulse voltage, the crack tip temperature can reach more than 1500 鈩，
本文编号：2510295
[Abstract]:The temperature field and stress field of pulse discharge electromagnetic thermal crack arrest were simulated by ANSYS, and then the instantaneous variation of surface temperature field of 16Mn steel sample coated with Ni45 alloy powder after electromagnetic thermal crack arrest was simulated. The results show that at 8000 V high voltage pulse voltage, the crack tip temperature can reach more than 1500 鈩，
本文编号：2510295
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