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简介了巨龙钢管有限公司采用宝山钢铁股份有限公司生产的X120钢级管线钢板试制JCOE管线管的情况。研究了X120钢级钢板力学性能的变化、JCOE成型特点、焊接性、热影响区的软化、矩形和圆棒拉伸试样的对比试验以及不同焊接材料匹配、焊接热输入量对焊接接头的硬度、强度和韧性的影响;与X100钢级进行了对比分析。提出了X120钢级管线钢管的拉伸试验采用圆棒试样和制订管线钢钢板、钢管标准的建议。
Brief introduction of Julong Pipe Co., Ltd. Baoshan Iron and Steel Co., Ltd. production of X120 steel grade pipeline plate trial JCOE pipeline situation. The change of mechanical properties of X120 steel plate, the forming characteristics of JCOE, the weldability, the softening of heat affected zone, the contrast test of rectangular and round bar tensile specimens and the matching of different welding materials and welding heat inputs on the hardness , Strength and toughness; compared with X100 steel grade. Proposed the X120 steel grade pipeline steel tensile test using the round rod sample and formulate the pipeline steel plate, steel pipe standard recommendations.