采用搅拌摩擦焊工艺对AZ80镁合金进行焊接,在其它工艺参数不变的条件下,研究了焊接速度对接头成形及组织的影响.结果表明:在搅拌头旋转速度为1 000 r· min-1、焊接速度为150 mm·min-1时可获得表面无缺陷、内部无孔洞的致密焊缝；焊速越大,焊核区前进侧中部组织中的动态再结晶晶粒越细小,焊速对热机影响区和热影响区组织的影响基本相同.
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