中文摘要：

采用Gleeble-1500热模拟试验机进行单向压缩热模拟试验,研究了试验钢在形变诱导铁素体相变过程中ZrC粒子对铁素体晶粒细化的促进作用,结果表明：粒径小于1.0μm的ZrC粒子作为形变和再结晶核心可以加速铁素体形核,从而细化铁素体晶粒,为提高α-Fe形核率,试验钢获得超细组织的ZrC粒子临界体积分数是0.6%,当ZrC粒子的加入量为0.5%、轧制变形量为0.6时,轧后水冷可获得3~4μm的超细晶粒组织,抗拉强度约提高70%,材料综合性能显著提高.

英文摘要：

The auxo -action of ZrC particles to ferrite grain refining during deformation induced ferrite transformation of the tested steel was investigated by unidirectional compression thermal simulating experiment with Gleeble - 1500. The results show that the ZrC particles which radius lessthan 1.0 trm as a deformation and recrystallization nucleus can accelerate ferrite nucleating thus refine ferrite grain, and in order to improve α - Fe nucleating rate,the critical volume fraction of ZrC particles is 0.6% which leads to the ultrafine microstructure of the tested steel. When the rolling defonnation is 60% and the volume fraction of ZrC particles is 0.5% the fine structure with a grain size of 3 -4 μm was obtained,tensile strength was improved 70 percent approximately, and the integrating mechanical properties of the steel are increased obviously.