自升式平台用厚板的低温韧性与Z向性能

狄国标 刘振宇 麻庆申 刘相华 王国栋

钢铁研究学报 ›› 2010, Vol. 22 ›› Issue (07) : 51-51.

钢铁研究学报 ›› 2010, Vol. 22 ›› Issue (07) : 51-51.
材料研究

自升式平台用厚板的低温韧性与Z向性能

  • 狄国标 刘振宇 麻庆申 刘相华 王国栋
作者信息 +

Research on Low Temperature Toughness and Z-direction Performance of Self-elevating Platform Plate

  • Zhen-yu LIU Xianghua LIU WANG Guo-dong WANG
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摘要

在4300mm宽厚板轧机上进行了自升式平台用厚板F460-Z35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Z向断面收缩率不合。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。

Abstract

Self-elevating platform offshore platform plate F460-Z35 was developed in 4300 mm heavy plate mill. It was suggested that there are banding M/A island caused weak toughness in the central position and MnS induced low shrinkage of Z direction tensile. Little M/A island and polygonal ferrite could be achieved 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

Key words

M/A island / low-temperature impact / self-elevating platform plate / lamellar tearing

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导出引用
狄国标 刘振宇 麻庆申 刘相华 王国栋. 自升式平台用厚板的低温韧性与Z向性能[J]. 钢铁研究学报, 2010, 22(07): 51-51
Zhen-yu LIU Xianghua LIU WANG Guo-dong WANG. Research on Low Temperature Toughness and Z-direction Performance of Self-elevating Platform Plate[J]. Journal of Iron and Steel Research, 2010, 22(07): 51-51

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