自升式平台用厚板的低温韧性与Z向性能  

Low Temperature Toughness and Z-Direction Performance of Self-Elevating Platform Plate

作　　者：狄国标[1] 刘振宇[1] 麻庆申[2] 刘相华[1] 王国栋[1] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110004 [2]首钢总公司技术研究院,北京100043

出　　处：《钢铁研究学报》2010年第7期51-55,共5页Journal of Iron and Steel Research

基　　金：国家高科技技术发展计划资助项(2007AA03Z504);国家科技支撑计划资助项(2006BAE03A08)

摘　　要：在4 300 mm宽厚板轧机上进行了自升式平台用厚板F460的工业试验,并对低温韧性和Z向性能进行了研究。结果表明,心部条带状M/A岛导致低温韧性偏低,MnS夹杂物诱发厚度方向(Z向)拉伸断面收缩率不合格。采用降低碳、锰含量并提高轧后冷却速率的方法,避免了条带状M/A岛组织,低温韧性明显改善;通过增加Si-Ca线长度,增强对MnS夹杂物的球化效果,生成细小难变形的复合夹杂物,有利于提高平台用厚板的抗层状撕裂性能。Self-elevating platform plate F460 was developed in 4 300 mm heavy plate mill.It was suggested that the banding M/A island caused weak toughness in the central position and MnS induced low shrinkage of Z direction tensile.Specimens banding M/A island could be avoided by reducing the content of carbon,manganese and increasing cooling rates after rolling.And then satisfactory low-temperature toughness could be gotten.Shrinkage of Z direction tensile specimens could be increased while the length of Si-Ca wire was increased to change banding MnS to spherical hard deformation compound inclusion in steel-making process.Offshore platform plate had good anti-lamellar tearing property.

关 键 词：M/A岛 低温冲击 自升式平台用钢 层状撕裂 

分 类 号：TG142.15[一般工业技术—材料科学与工程]