超细第二相粒子强化低碳微合金钢铁材料的研究  

Study of Strengthening Low-Carbon Microalloy Steel by Adding Ultrafine Second-Phase Particles

作　　者：唐明华[1,2] 刘志义[2] 胡双开[3] 

机构地区：[1]湖南工学院机械系,湖南衡阳421002 [2]中南大学材料科学与工程学院,湖南长沙410083 [3]湖南衡阳钢管(集团)有限公司,湖南衡阳421001

出　　处：《南华大学学报（自然科学版）》2008年第4期32-36,共5页Journal of University of South China：Science and Technology

基　　金：国家自然科学基金资助项目(59971031);湖南省自然科学基金资助项目(05JJ40063)

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.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.

关 键 词：ZRC粒子 超细晶粒钢 形变诱导铁素体相变 

分 类 号：TG142[一般工业技术—材料科学与工程]