X120鋼級(jí)Φ914mm×16mm直縫埋弧焊管制造技術(shù)研究

Study on Manufacture Technology of Φ914 mm×16 mm Straight SAW Pipe in X120 Steel Grade

摘要: 簡(jiǎn)介了巨龍鋼管有限公司采用寶山鋼鐵股份有限公司生產(chǎn)的X120鋼級(jí)管線鋼板試制JCOE管線管的情況。研究了X120鋼級(jí)鋼板力學(xué)性能的變化、JCOE成型特點(diǎn)、焊接性、熱影響區(qū)的軟化、矩形和圓棒拉伸試樣的對(duì)比試驗(yàn)以及不同焊接材料匹配、焊接熱輸入量對(duì)焊接接頭的硬度、強(qiáng)度和韌性的影響;與X100鋼級(jí)進(jìn)行了對(duì)比分析。提出了X120鋼級(jí)管線鋼管的拉伸試驗(yàn)采用圓棒試樣和制訂管線鋼鋼板、鋼管標(biāo)準(zhǔn)的建議。

Abstract: Briefed in the paper is the trial manufacture of JCOE linepipe by Julong Steel Tube Co., Ltd. with X120 linepipe steel as made by Baoshan Iron ＆ Steel Co., Ltd. The study focuses on such aspects as change of the mechanical properties of the X120 steel plate, the forming characteristics, weldability and softening of the heat affected zone（HAZ）of JCOE, the comparative testing with rectangular and round tensile test pieces and the influences by different welding material proportions and welding thermal input on hardness, strength and toughness of the weld joint;Comparative analysis between X100 steel and X120 steel is conducted. Proposals about using round tensile test piece for X120 steel linepipe, and drafting the standards of linepipe steels and steel linepipes are put forward.