低碳高强船板钢连续冷却转变规律研究  

A Research on the Rules of Continuous Cooling Transformation of Low-carbon and High-strength Ship Plate Steel

作　　者：孙秀伟[1,2] 梁国俐[1,2] 

机构地区：[1]唐山学院机电工程系,河北唐山063000 [2]唐山学院机械工程省级实验教学示范中心,河北唐山063000

出　　处：《唐山学院学报》2017年第6期28-31,共4页Journal of Tangshan University

基　　金：河北钢铁联合基金项目(E2015105052)

摘　　要：以低碳高强船板钢为研究对象,用热膨胀法、金相法测得了试验钢的连续冷却转变曲线,并对试验钢连续转变曲线CCT测定过程的各个冷却速度下的显微组织分别予以讨论。结果表明,尽管试验钢连续转变曲线CCT测定过程出现组织多元化、形成机制复杂化的现象,但仍然可以按照相变组织简单归类为多边形铁素体(PF)和珠光体(P)、退化珠光体(PD)、贝氏体(B)、马氏体(M)。其中PF和P为近似平衡态相变,因PD的形成需要局部或一定的过冷度,故它是非平衡转变产物。With low-carbon and high-strength ship plate steel as the research subject,and applying the thermal expansion method and the metallographic method,the authors of this paper acquired the continuous transformation curve of the tested steel,and analyzed the microstructure in the measurement process of the continuous cooling transformation curve at different cooling rates.The results show that although the measurement process of CCT of tested steel demonstrates the complicated features of organizational diversity and complexity of the formation mechanism,CCT can be roughly classified as polygonal ferrite（PF）and pearlite（P）Pearlite（PD）,and bainite（B）,martensite（M）,among which,PF and P are nearly equilibrated phase transitions,and PD is a non-equilibrium transformation product,because its formation requires local cooling or certain supercooling.

关 键 词：高强度船板钢 连续冷却 转变曲线 微观组织 

分 类 号：TG142.1[一般工业技术—材料科学与工程]