基于CSP工艺，通过对X65和X65Re管线钢进行热模拟试验，分析稀土铈元素细化X65管线钢组织晶粒的机理。试验结果表明，稀土铈能抑制X65管线钢再结晶的发生，在热变形过程中有利于应变能累积，在连续多道次变形后，所累积的应变能为变形诱导铁素体相转变提供驱动力，进而细化了组织晶粒。
Base on CSP process, the grain refinement mechanisms of Re on X65 pipeline steel was analyzed by the hot simulation experiment of X65Re and X65 pipeline steel. Experimental results show that rare earth Ce can in- hibit recrystallization behavior of X65 pipeline steel, strain energy can be accumulated during hot deformation process. After multi-pass processing, the accumulated deformation energy can provide a driving force for ferritic phase transformation, therefore the microstructure grains can be refined.
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