基于CSP工艺,利用Gleeble-1500D热模拟实验机分别对含稀土和不含稀土X65管线钢试样进行CSP工艺的后四道次轧制实验模拟。实验结果表明,在管线钢中加入稀土元素Ce能明显提高钢加工硬化程度。在低温轧制时,稀土元素Ce加入X65管线钢能提高应变能的积累,进而为再结晶行为的发生提供了条件。 Based on the CSP technology, the Gleeble-1500D thermal simulator was used to simulate the last four pass rolling experiments of CSP with rare earth and non-rare earth X65 pipeline steel respectively. The experimental results show that adding rare earth element Ce in pipeline steel can obviously improve the work hardening degree of steel. The addition of rare earth element Ce to X65 pipeline steel can increase the strain energy accumulation during low temperature rolling, which provides the conditions for the recrystallization behavior.