论文部分内容阅读
在对5 mm厚的AZ31B镁合金板材进行GTAW焊接过程中施加活性剂形成A-TIG,活性剂由TiO2、Cr2O3和CaO等氧化物组成。为了确定最佳活性剂配比,对不同活性剂下焊接接头的组织、力学性能进行检测,研究不同组份活性剂对焊缝成型性和组织性能的影响规律。结果表明,活性剂的加入使得焊缝熔深、熔宽及深宽比都有所增加,其中单一TiO2增加熔深效果最佳,达到无活性剂时的197%;双组份及混合活性剂可增加焊缝熔深,但没有单一TiO2活性剂效果明显,此时熔深为无活性剂时的192%;活性剂的加入对焊缝组织及性能影响不大。
During the GTAW welding of 5 mm thick AZ31B magnesium alloy sheet, an active agent is formed to form A-TIG. The active agent is composed of oxides such as TiO2, Cr2O3 and CaO. In order to determine the optimal ratio of active components, the mechanical properties of the welded joints under different active agents were tested to study the influence of different active agents on the formability and microstructure of the weld. The results show that the penetration depth, melting width and aspect ratio of the weld joint increase with the addition of active agent, and the best effect of single TiO2 is obtained when the penetration depth reaches to 197% when the active agent is added. The two components and mixed active agent The penetration depth of weld bead can be increased, but there is no obvious effect of single TiO2 active agent. At this time, the penetration depth is 192% of the inactive agent. The addition of active agent has little effect on the microstructure and properties of the weld.