X100鋼級螺旋縫埋弧焊管制造技術(shù)研究

Study on Manufacture Technology of X100 SAWH Pipes

摘要: 介紹了X100鋼級管線鋼板卷螺旋縫埋弧焊接制管的過程;研究了X100鋼級板卷的力學(xué)性能及不同焊接材料匹配對焊接接頭強度、韌性和硬度的影響;提出了不去除螺旋縫埋弧焊管焊縫余高,優(yōu)化板卷合金成分、提高板卷層流冷卻速度及降低焊接熱輸入量,管體橫向拉伸試驗采用圓棒試樣,制定X100鋼級管線鋼板卷和螺旋縫埋弧焊管標準等建議。

Abstract: Described is the process of manufacturing SAWH pipes with X100 pipeline-service steel strip;studied are the influences by the mechanical properties of the steel strip and different welding material formulas on strength,toughness and hardness of the welding joint.Accordingly,relevant suggestions are proposed,including maintaining the excess weld metal(reinforcement) of the SAWH pipe,optimizing the alloy elements,enhancing the strip laminar cooling velocity and reducing welding heat input,using round bar-shaped specimen for pipe body transversal tensile test and establishing specification for the X100 steel strip and the X100 SAWH pipe.