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本项研究包括了当前推动磨擦焊技术进一步发展和应用的三方面内容。分别简介如下：1．摩擦焊接头焊后余热处理的研究摩擦焊接头韧性低。目前各国都是通过常规焊后热处理改善它的韧性，但也只能提高到（调质）母材韧性的一半左右。本项成果针对摩擦焊接过程同时存在相变与形变的
This study includes three aspects to promote the further development and application of friction welding technology. Brief introduction are as follows: 1. Friction welded joint after welding heat treatment research Friction welded joint toughness low. At present, all countries improve their toughness by conventional post-weld heat treatment, but only up to about half of the toughness of the base metal (quenched and tempered). The results for the friction welding process exist both phase transformation and deformation