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作者在本文中研究了在ＭＩＧ焊焊丝熔化率与焊接参数（电流密度，伸出长度和保护气体成分）的关系，发现，如果伸出长度和保护气体不变，尽管焊接电流和焊丝直径有不同变化，而焊丝熔化率仅与焊接电流密度有关。 通过实验和理论分析，作者成功地评定电阻热和电弧热的分别作用，并导出焊接时焊丝的电阻率。伸出长度上的温度分布及其平均温度亦可近似求出。还发现保护气体对焊丝熔化率有一定的影响，但影响的程度在焊接电流大幅度变化时保持不变。 文中所得之结果将有助于在ＭＩＧ焊中选择焊接参数和控制焊接质量。
In this paper, the authors studied the relationship between the melting rate of MIG welding wire and the welding parameters (current density, extension length and shielding gas composition) and found that if the length of extension and the shielding gas are constant, the welding current and wire diameter are different Change, and wire melting rate only with the welding current density. Through experimental and theoretical analysis, the author succeeded in assessing the respective effects of resistance heat and arc heat and deriving the resistivity of the welding wire during welding. The temperature distribution over extended length and its average temperature can also be approximated. It was also found that the protective gas had a certain effect on the rate of melting of the wire, but the extent of the effect remained unchanged as the welding current changed drastically. The results obtained in this paper will help to select the welding parameters and control the welding quality in MIG welding.