backing welding

基本解釋

This welding backing is used with all one-side processes. Especially for those which do not demand back bead cleaning.
本襯墊可用于各種單面焊接工藝的位置，特別適用于不一定要求封底焊道的場合。
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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 .
但是單面焊打底層焊縫中出現(xiàn)的沿焊縫柱狀晶結(jié)晶方向的柱狀氣孔，嚴重地影響著船舶焊接質(zhì)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.
研究發(fā)明的“背襯砂墊焊接工藝”能夠非常容易地實現(xiàn)焊透的目的，可以完全取代落后的碳弧氣刨清根工藝，克服了目前常用的碳弧氣刨清根所帶來的缺點、弊病和不足。