电火花堆焊技术的研究及在电力轴类修复中的应用
Research and Application of Electric-spark Overlaying Process in Restoring Electric Axle Parts
赵晓春1, 孙增伟1, 刘晓明1,2, 高云鹏1
点击：3142次 下载：0次
作者单位：（1.内蒙古电力科学研究院，内蒙古 呼和浩特 010020；2.内蒙古工业大学，内蒙古 呼和浩特 010051）
中文关键字：电火花堆焊； 轴类； 修复； 应用
英文关键字：electric-spark overlaying; axle parts; restoration; application
中文摘要：电力轴类常因在运输、装配及运转过程中的磕碰、拉毛、磨损造成局部损伤而导致其过早失效。为了为之提供电火花堆焊修复应用技术和理论支持，研究了电火花堆焊的最佳工艺及堆焊层至母材间的硬度分布，探讨了堆焊层的组织及合金元素的过渡情况。结果表明，在最佳工艺参数下，可成功实现电力轴类部件的电火花堆焊修复，堆焊层至母材间硬度的变化区域较窄，表明其焊接热影响区范围较小，堆焊层与母材合金元素过渡均匀，结合良好。
英文摘要：Electric axle part was partially damaged because it was knocked, galled or wore during transporting, assembling or operating, which resulted in early failure of the parts. In order to provide practice and theory support to restore electric failure axle parts by electric-spark overalying, the microhardness distribution from electric-spark overlaying coating to base metal under the best parameters was researched. The microstructure and alloy transfer were discussed. The results show that the failure electric axle parts can be restored by electric-spark overlaying. The microhardness variation between electric-spark overlaying coating and base metal is narrow, which means that the HAZ is narrow. The alloy element gradually transfers from electric-spark overlayer coating to base metal which with combines well each other.