Effect of MnCl₂ introduction on alternating current arc of powder molten pool coupled activating TIG welding

MnCl 2 引入对粉末熔池耦合活性TIG焊交流电弧的影响 Effect of MnCl 2 introduction on alternating current arc of powder molten pool coupled activating TIG welding 黄勇 HUANG Yong 1 2 first-author 薛旭普 XUE Xupu 1 兰州理工大学材料科学与工程学院 兰州理工大学材料科学与工程学院 College of Materials Science and Engineering,Lanzhou University of Technology College of Materials Science and Engineering,Lanzhou University of Technology 兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室 兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室 State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals,Lanzhou University of Technology State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals,Lanzhou University of Technology 粉末熔池耦合活性TIG焊接法是一种新型高效焊接方法,通过选择对应的活性剂粉末,可实现几乎所有金属的焊接。针对采用MnCl2作为活性剂的交流粉末熔池耦合活性TIG焊电弧,采集等离子体光谱,利用Boltzmann作图法分析了电弧等离子体温度随时间的变化规律,并结合电弧电压变化规律,通过与传统交流TIG电弧对比研究MnCl2对交流电弧的影响。结果表明,对于交流TIG电弧,EN时段的电弧光谱强度高于EP时段,EN时段的电弧电压小于EP时段,EN时段的电弧温度低于EP时段。而由于活性剂MnCl2的引入,交流粉末熔池耦合活性TIG电弧的中心温度与EN时段和EP时段的电弧电压均高于传统交流TIG电弧,焊缝熔深较传统交流TIG焊显著增加。 Powder molten pool coupled activating TIG welding is a novel efficient welding method. Almost all metals can be welded by selecting corresponding activating flux powders. For AC powder molten pool coupled activating TIG welding arc with MnCl 2 as activating flux, the spectrum of a rc plasma was collected and Boltzmann plot method was used to analyze the variation rule of arc plasma temperature with time. Combined with the variation rule of arc voltage, the effects of MnCl 2 on AC arc were studied based on the comparison with traditional AC TIG arc. The results show that for AC TIG arc, the arc spectral intensity in EN period is higher than that in EP period, the arc voltage and arc temperature in EN period are lower than those in EP period. Because of the introduction of activating flux MnCl 2 , the central temperature and arc voltage of AC powder molten pool coupled activating TIG arc are higher than those of traditional AC TIG arc in both EN and EP periods, and the weld penetration of AC powder molten pool coupled activating TIG welding is significantly increased compared with that of traditional AC TIG welding. 粉末熔池耦合活性TIG焊 交流电弧 光谱分析 温度变化 电弧电压 powder molten pool coupled activating TIG welding alternating current arc spectral analysis temperature variation arc voltage TG444.74 国家自然科学基金（51965036） 2022-03-08 11 51