SPHC钢在不同冷却条件下的相变规律研究  

Research of Phase Transformation Rules of SPHC Steel under Different Cooling Condition

作　　者：郑彬华[1] 王连军[2] 卢俊毅[2] 吕德文[2] 康永林[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]邯郸钢铁股份有限责任公司技术中心,河北邯郸056002

出　　处：《轧钢》2006年第6期4-7,共4页Steel Rolling

摘　　要：采用Gleeble1500热模拟试验机及DT-1000膨胀仪测定SPHC钢的连续冷却转变曲线,观察了不同变形及冷却工艺条件下的金相组织。结果表明,SPHC钢的金相组织由铁素体和少量珠光体组成,随着冷却速度的增加,其晶粒细化,强度提高。变形条件下的相变开始温度和终了温度大于未变形条件下的,并且其晶粒直径比未变形条件下的小1μm左右。By using Gleeble1500 thermal simulator and DT-1000 dilatometer, the CCT （continuous cooling transformation） curves of SPHC steel were determined. The CCT microstructure was observed. It was found that microstructure of SPHC steel consists of ferrite and pearlite. Increasing cooling rate results in grain refinement and strength rise. The temperature Ar1 and Ar3 are lower in deformed test sample than that in undeformed and the average grain diameter of the deformed test sample is about 1μm smaller of the counterpart undeformed test sample.

关 键 词：SPHC钢 强度 CCT曲线 显微组织 

分 类 号：TG113.12[金属学及工艺—物理冶金]