连铸、输送和加热过程E36铸坯组织的演变  

Micro-Structural Evolution of E36 Slab During Process of Continuous Casting-Conveying-Heating

作　　者：朱正海[1,2] 肖丽俊[2] 王强[2] 彭世恒[2] 干勇[2] 

机构地区：[1]安徽工业大学冶金与资源学院,安徽马鞍山243002 [2]钢铁研究总院连铸技术国家工程研究中心,北京100081

出　　处：《钢铁》2014年第3期29-35,共7页Iron and Steel

基　　金：国家自然科学基金资助项目(51304003);国家科技支撑计划资助项目(2006BAE03A)

摘　　要：基于连铸、输送、加热过程大板坯的传热研究,针对E36铸坯的组织演变,系统研究了不同热履历对E36铸坯组织演变的影响,为优化界面技术提供了依据。结果表明,铸坯以不同输送方式冷至625℃以下再加热后的开轧组织没有显著差异,铸坯是否经过奥氏体-铁素体-奥氏体相变过程是影响开轧组织的主要因素。铸坯横断面不同位置的组织演变过程不尽相同,若采用低温区装炉,应保证铸坯横断面中心温度在625℃以下,若采用高温区热装,应将铸坯角部温度控制在805℃以上。Based on study for heat transfer of slab in process of continuous casting-conveying heating, as for the mi- cro-structural evolution of E36 slab, the effect of different thermal history for micro-structural evolution was investi- gated to provide the reference for the improvement of interface-technique. Their start roiling microstructure is no significant difference after heating when slab conveyed by different way and then cooled down to the temperature be- low 625 ℃. 3＇-a ＂/phase transformation is one of the main factors affecting the start rolling microstructure. The mi- cro-structural evolutions of slab cross section at different positions are not the same. If low charging temperature is adopted, the temperature of central of slab cross section should be below 625 ℃. Whereas, the temperature of slab corner should be above 805 ℃.

关 键 词：界面 铸坯 组织演变 热履历 

分 类 号：TG142.11[一般工业技术—材料科学与工程]