【作者】 马翔；

【导师】 张玉兰；

【作者基本信息】 长春理工大学 ， 材料加工工程， 2008， 硕士

【摘要】 针对AZ31B镁合金,研究了氧化物、氯化物、氟化物活性剂对活性交流TIG焊接过程中活性剂增加熔深的规律。分析了焊接参数对增加熔深效果的影响规律以及活性剂的涂敷量对熔深的影响。研究了活性剂对焊接熔池元素的分布以及熔池形状的影响。本文首次对镁合金交流TIG活性焊接的电弧光谱进行拍摄。通过焊接电弧等离子体的温度,得出氯化物活性剂焊接电弧等离子体的电子温度增加显著,而氧化物活性剂的电子温度增加不多,探讨了不同种类的活性剂增加熔深的机理。采用均匀设计法对镁合金复合配方活性剂进行了设计,实验结果显示涂敷最佳复合配方活性剂与涂敷单一活性剂的金相组织相比,晶粒细化比较明显,抗拉强度高。更多还原

【Abstract】 The weld penetration increased of chloride, oxide and fluoride activating flux on AZ31B Mg alloy TIG welding were investigated during welding. The welding parameters and flux thickness have a different effectiveness in weld penetration increased. The shape and distribution of element of welding pool in the A-TIG welding was studied.The spectrum of welding arc in the A-TIG welding Mg alloy was studied for the first time. By the electron temperature of welding arc plasma, it was found that chloride welding arc plasma were greater than that of TIG welding arc plasma, but the electron temperature of oxide welding arc plasma was increased small than that of TIG welding arc plasma. The mechanism of weld penetration increase with activating flux was discussed. For ACTIG welding of Mg alloy in this paper.The compound fluxes of the AZ31B Mg alloys were designed by the method of uniformity design. The Results showed that the prime compound fluxes have a thinner grain size in the weld seam and a better intensity than with the different kinds of fluxes.更多还原