【摘要】 通过拉伸、冲击、硬度以及扫描电镜(SEM)分析等试验对U71Mn钢轨钢与辙叉用合金贝氏体钢闪光对焊接头的性能进行了分析和研究.试验结果表明:贝氏体合金钢与U71Mn钢轨钢闪光对焊接头硬度分布为:合金钢侧较均匀,钢轨钢侧热影响区硬度高于母材.接头的拉伸性能与U71Mn钢轨钢母材相同,其拉伸和冲击性能均达到了铁道部有关标准要求.这说明贝氏体合金钢与U71Mn钢轨钢采用闪光对焊连接是完全可行的.更多还原

【Abstract】 By tension, impact, hardness and SEM, the mechanical property of the flash butt welding joint of U71Mn rail steel to bainitic allloy steel used for railway frog is studied. The results indicate the distribution of hardness in the of alloy steel side is uniform, and the hardness at the HAZ of the rail steel is higher than that of the base material. The tension property is the same as the U71Mn steel,and both the tension and impact property meet the corresponding requirements of Railways Ministry , which indicates the feasibity of the bainitic alloy steel to the rail steel joint by flash butt welding.更多还原