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47—1 下文的划线部分,在叙述上有错误,请予以更正。(1)用80%Ar+20%CO_2的混合气体的 MAG 焊接,与同一焊接规范下的 CO_2焊接相比,焊道宽度将变窄,熔深将变深。(2)MIG 焊接时,与焊丝接正相比,焊丝接负时的熔敷速度将变小,熔深将变深。(3)在埋焊弧时,如使母材向焊接轴线方向倾斜,进行上坡焊时,与把母材水平放置的场合相比,焊道宽度将变宽,熔深将变浅。(4)在短弧焊接的场合,如果焊接回路的电容器的值不能保持适当,不仅会导致飞溅增多,电弧也容易变得不稳定。
47-1 The underlined part of the text below, there are errors in the description, please correct it. (1) MAG welding with mixed gas of 80% Ar + 20% CO 2, the welding bead width will be narrower and the penetration depth will be deeper than that of CO 2 welding under the same welding standard. (2) MIG welding, compared with the wire directly connected, welding wire negative when the deposition rate will become smaller, the penetration will become deeper. (3) In the case of arc welding, if the base material is inclined toward the welding axis, the width of the weld bead will be wider and the penetration depth will be shallower than that in the case of the base material placed horizontally. (4) In the case of short-arc welding, if the value of the capacitor of the welding circuit can not be maintained properly, not only the increase of the spatter but also the instability of the arc easily occur.