root groove 中文意思是什麼
root groove
解釋
根部坡口-
5 all single - sided groove joints in nickel alloys, stainless steel and ferritic alloys containing more than two ( 2 ) percent chromium shall be welded using a gas tungsten - arc root pass with an inert gas back purge
鉻含量超過2 %的鎳合金、不銹鋼和鐵素體合金的單面坡口焊道用鎢極氣體保護焊,其根部焊道用惰性氣體反吹。 -
4 double - welded groove joints shall have their root passes back gouged to sound metal on the reverse side before proceeding with welding on that side
雙面焊接的坡口焊道,應在焊接前將該面底部焊道逆向刨削,直到其對面露出完好的金屬。
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