低成本高韧性X70钢级板卷及螺旋埋弧焊管的研制

Pressure Vessel Technology(2013)

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Abstract
研究了X70钢级减少或不添加价格昂贵的Mo等合金的螺旋焊管的化学成分、组织及性能,以及优异低温韧性钢管的焊材、焊接工艺。结果表明,研制的低成本钢管达到技术条件的要求,其包辛格效应值较小,为8 MPa;钢管周向弹复在30 mm以内;-29℃的管体横向、焊缝及热影响区的夏比冲击功均优于西气东输二线技术条件X70钢级钢管的指标,并成功应用于国外管道工程。
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Key words
Bauschinger effect,low-temperature toughness,X70,low cost,submerged-arc welding helical(SAWH) pipe,pipeline steel
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