被覆アーク溶接棒の溶滴移行性について(第 1 報) : 溶滴粒度の測定方法

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The metal transferring characteristics of welding electrode play a significant role in evaluating the so-called workability of the electrode. They have various meanings including the behaviour of metal droplets which leave the electrode tip and are transferred to molten pool. Although the size of droplets depends upon the distance from electrode tip to molten pool, the average size of droplet when the distance is too large to make the contact transfer, may be a constant value characteristic of the electrode. Authors devised a new method to catch such flying droplets by means of directly quenching them in water, during arc discharging between a carbon and a coated electrode. Droplets are sifted through standard sieves, the weight of specified number of droplets in each lot is measured and averaged, and then the particle diameter assumed as a solid sphere is calculated. Obtained diagram, which is showing the relation between the integrated weight percentage of each lot and calculated particle size, is the most clear-cut representation of transferring characteristic of droplets peculiar to each kind of welding electrode and welding condition. On this curve, the particle diameter at 50% is designated as d 50 as a criterion of the droplets size, and it seems to be a very convenient measure to analyze the meanings of workability. In this report, various factors influencing the result were tested, and a standard method was established.
社団法人溶接学会の論文
1963-03-25

被覆アーク溶接棒の溶滴移行性について(第 1 報) : 溶滴粒度の測定方法

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