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研究了四种系列管线用钢的工艺对显微组织和力学性能的影响以及钢的可焊性，结果表明，间歇加速冷却速度Ｖｃ和间歇加速冷却终止温度Ｔｆ是控轧控冷工艺的两个主要参数，在Ｖｃ＝５～１２℃／ｓ、Ｔｉ＝５５０～６００℃的条件下，可获得超细或细的针状铁素体组织，具有良好的强韧性配合，满足了Ｘ６０～Ｘ８０级别（美标ＡＰＩ５ＬＸ）管线钢的要求，采用高温回火，还可获得最修的综合性能，尤其是低温韧性，可满足低焊接裂纹敏感性的压力容器用钢（ＣＦ６２）的要求。
The effects of the four series of pipeline steel on the microstructure and mechanical properties and the weldability of the steel were studied. The results show that the intermittent accelerated cooling rate Vc and the intermittent accelerated cooling termination temperature Tf are two of the controlled rolling and controlled cooling processes The main parameters of ultrafine or fine acicular ferrite can be obtained under the conditions of Vc = 5 ~ 12 ℃ / s and Ti = 550 ~ 600 ℃, which has a good combination of strength and toughness to meet the X60 ~ X80 level (American Standard API5LX) pipeline steel requirements, the use of high temperature tempering, but also to get the most comprehensive performance, especially the low temperature toughness, to meet the requirements of the low pressure crack weld steel (CF62) requirements.