研究了棒线材无头轧制的工艺参数 ,选择 2 0 Mn Si钢作为研究对象 ,采用预热闪光焊接模拟高温状态下的坯料焊接。焊后轧制使用30 0轧机。通过轧制研究了轧制前后轧件焊缝的变形情况 ,焊缝轧制前后的硬度情况和焊缝金相组织的变化。结果表明 ,合理的焊接工艺和足够的焊后轧制变形能够使焊缝的组织性能与基体相近 ,满足使用要求 The process parameters of endless rolling of rod and wire were studied, and 20 Mn steel was selected as the research object. The preheating flash welding was used to simulate the welding of blank at high temperature. Post-weld rolling 30 0 mill. The deformation of the rolling seam before and after rolling was studied by rolling, the hardness before and after the rolling and the microstructure of the weld. The results show that the reasonable welding process and sufficient post-weld rolling deformation can make the microstructure and properties of the weld similar to the substrate,