The quenched 45 steel samples were jointed by linear friction welding.The microstructure evolution, microhardness and tensile properties of the joint were investigated.

• 摘要对淬火状态下的45钢进行了线性摩擦焊接试验，分析了焊接头的组织变化特点，并对接头的拉伸性能和显微硬度进行了测试。