【摘要】 研究了 MB3 镁合金的搅拌摩擦焊技术。对其塑性连接时的焊缝成形,焊缝组织形态及接头的力学性能进行了分析。结果表明,用搅拌摩擦焊方法焊接 MB3 镁合金,当工艺参数合适时,可获得外观成形美观、内部无缺陷,几乎无变形的平板对接接头。接头力学性能试验表明,其抗拉强度可达母材的 97.2%,高于熔焊接头的强度,断裂位置大多位于热影响区。更多还原

【Abstract】 Friction stir welding (FSW) is a new solid-phase plastically joining process development in the beginning of the 1990’s. In this paper, an investment was carried out on the FSW of MB3 magnesium alloy. An excellent weld appearance, without void, cracking, or distortion was obtained when the welding parameters were carefully chosen. The mechanical property results shown that maximum joint tensile strength can reach 97.2% of the parent material. This is stronger than that of fusion joints, and the failure locations are almost at the heating affected zone.更多还原