【摘 要】
：
Arc pressure is the key influencing factor to forming of molten pool.Countering the characteristic of tungsten inert gas arc welding with micro gap for tantalum
【机 构】
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State Key Laboratory of Advanced Welding Production Technology,Provincial Key Laboratory of Advanced
论文部分内容阅读
Arc pressure is the key influencing factor to forming of molten pool.Countering the characteristic of tungsten inert gas arc welding with micro gap for tantalum sheet, according to the fundament of arc physics, a distribution model of arc pressure and forming mechanism of molten pool with micro butt gap are proposed, and the influences of arc pressure on forming of molten pool are discussed.Experimental researches for the dynamic formation process of weld molten pool by using high-speed vidicon camera show that when buttgap is appropriate, that is from 0.1 to 0.15 mm, molten metals formed on two workpiece uplift and growup first, then are fused and form uniform molten pool finally.
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