backing welding

基本解释

This welding backing is used with all one-side processes. Especially for those which do not demand back bead cleaning.
本衬垫可用于各种单面焊接工艺的位置，特别适用于不一定要求封底焊道的场合。
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But in the backing welding, columnar grain-growth will be appeared in the direction of crystal direction, it effects the welding quality seriously .
但是单面焊打底层焊缝中出现的沿焊缝柱状晶结晶方向的柱状气孔，严重地影响着船舶焊接质量。
A welding backing with sand mould has been invented to realize welding penetration, which fully takes the place of gouging back chipping which has all kinds of shortcomings and disadvantages.
研究发明的“背衬砂垫焊接工艺”能够非常容易地实现焊透的目的，可以完全取代落后的碳弧气刨清根工艺，克服了目前常用的碳弧气刨清根所带来的缺点、弊病和不足。