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本文在大量焊接试验的基础上，着重分析了Ｔ形接头未熔透的机理─—夹渣。通过焊接试验，确定了采用埋弧自动焊高效焊接Ｈ型钢达国家二级焊缝标准熔透焊的焊接工艺方案。
Based on a large number of welding experiments, this paper focuses on the mechanism of unmelted T-joints - slag inclusion. Through the welding test, the welding process scheme of using H-shape welded high-efficiency submerged arc welded steel to standard secondary penetration welding of national second-class welds was determined.