連鑄圓管坯軋管內折成因分析

Internal Surface Folding Analysis of Continuous Casting Tube Rounds

摘要: 針對包鋼連鑄圓管坯熱軋無縫鋼管產生大量內折缺陷這一問題,主要從鑄坯質量入手,運用逐步回歸方法,分析了形成內折的主要原因.研究結果表明,鋼水精煉成分Mn/S過低,澆注過熱度△t以及與其匹配的拉坯速度ν過高是造成鑄坯質量的主要原因,為提高產品質量提供了參考依據.

Abstract: During the hot rolling of seamless steel tubes, internal surface folding (ISF) is frequently formed in Baotou Iron & Steel Co. The main factors, which caused the ISF, are analyzed using the method of step regression. Results show that the lower value of Mn/S, the higher casting overheaded level △t and pulling velocity v are the main reasons caused ISF.