论文部分内容阅读
对模具堆焊工艺进行了PID控制的研究与对比分析,并用对两种工艺控制方法获得的Cr12MoV模具堆焊试样进行了表面硬度测试、冲击试验和耐磨性测试。结果表明,与传统简易控制方法相比,采用PID技术对堆焊工艺中的预热温度、堆焊电流和电弧电压进行控制,可以明显降低堆焊层不同位置处表面硬度的差异,使剪切断面率增加23.9%,使磨损体积减小60.8%,提高了模具的耐磨性和冲击韧性。
The mold surfacing technology was studied and compared with PID control. The surface hardness, impact and abrasion resistance of Cr12MoV mold surfacing samples obtained by the two process control methods were tested. The results show that compared with the traditional simple control method, PID technology is applied to control the preheating temperature, welding current and arc voltage in the welding process, which can obviously reduce the difference of surface hardness at different positions of the surfacing layer, The cross-sectional area increased by 23.9%, the wear volume decreased by 60.8%, which improved the wear resistance and impact toughness of the mold.