中国有色金属学报
中國有色金屬學報
중국유색금속학보
THE CHINESE JOURNAL OF NONFERROUS METALS
2015年
1期
72-79
,共8页
6061-T4铝合金%搅拌摩擦焊%T型接头%双道焊%力学性能
6061-T4鋁閤金%攪拌摩抆銲%T型接頭%雙道銲%力學性能
6061-T4려합금%교반마찰한%T형접두%쌍도한%역학성능
6061-T4 aluminum alloy%friction stir welding%T-joint%double passes welding%mechanical property
分别采用搅拌摩擦焊(FSW)单道焊和双道焊工艺方法制备铝合金T型接头,对比分析单道、双道FSW-T型接头的缺陷、显微组织、硬度及拉伸性能。结果表明:相对单道焊接头,双道焊工艺可有效降低FSW-T型接头缺陷尺寸及改善缺陷分布状态,隧道缺陷消失或面积降低,吻接缺陷长度降低;双道焊接头在前进侧和后退侧的组织和性能不均匀性明显降低,软化区范围和差异减小;双道焊接头拉伸性能明显提高,在筋板和壁板方向其拉伸性能普遍为母材的80%以上,明显高于单道焊接头的拉伸性能。
分彆採用攪拌摩抆銲(FSW)單道銲和雙道銲工藝方法製備鋁閤金T型接頭,對比分析單道、雙道FSW-T型接頭的缺陷、顯微組織、硬度及拉伸性能。結果錶明:相對單道銲接頭,雙道銲工藝可有效降低FSW-T型接頭缺陷呎吋及改善缺陷分佈狀態,隧道缺陷消失或麵積降低,吻接缺陷長度降低;雙道銲接頭在前進側和後退側的組織和性能不均勻性明顯降低,軟化區範圍和差異減小;雙道銲接頭拉伸性能明顯提高,在觔闆和壁闆方嚮其拉伸性能普遍為母材的80%以上,明顯高于單道銲接頭的拉伸性能。
분별채용교반마찰한(FSW)단도한화쌍도한공예방법제비려합금T형접두,대비분석단도、쌍도FSW-T형접두적결함、현미조직、경도급랍신성능。결과표명:상대단도한접두,쌍도한공예가유효강저FSW-T형접두결함척촌급개선결함분포상태,수도결함소실혹면적강저,문접결함장도강저;쌍도한접두재전진측화후퇴측적조직화성능불균균성명현강저,연화구범위화차이감소;쌍도한접두랍신성능명현제고,재근판화벽판방향기랍신성능보편위모재적80%이상,명현고우단도한접두적랍신성능。
6061-T4 aluminum alloy T-joints were jointed by friction stir welding under single pass and double passes. The welding defects, microstructure, hardness profiles and tensile strength under different welding passes were observed and discussed. The results show that, compared with the single pass welding joints, double passes welding joints have such advantages as follows, the size and distribution of defects are modified, the area of tunnel defects decreases or disappears and the kiss bonding decreases; the inhomogeneity of microstructure and property at advancing side and retreating side decreases greatly; besides, the area and difference of softened zone reduce; the tensile property improves evidently to 80% of that of the base metal, which is better than that of the single pass welding joints.