关键词：钢铁；工业设计；材料；贝式钢体；闪光对接焊
摘 要：Industrial design is important for industry,especially in the circumstance concerning the human security,of which the material selection and design basing on serious experiments,especially mechanical-tests have drawn more and more attentions of many artists and scientists.In this study,by tension,impact,hardness and scanning electron microscopy (SEM),the mechanical property of the flash butt welding joint of U71Mn rail steel to bainitic alloy steel used for railway frog is studied.