超大型集装箱船用特厚止裂钢的发展

doi:10.13228/j.boyuan.issn0449-749x.20200486

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Abstract For the excellent brittle crack arrest toughness,the heavy-gauge steel for mega container carriers can significantly reduce the hazard factor caused by complex alternating stresses on a large opening structure on the upper deck. By systematically summarizing the evaluation system of crack arrest toughness,comparing and analyzing the development trend of mega container carriers at home and abroad as well as the production status of heavy-gauge crack arrest steel,the microstructural characteristics and possible production process are summarized. The fine-grained equiaxed ferrite,polygonal ferrite,limited refined bainite,combined with the strengthened texture along with the γ orientation at 1/2 thickness are the keys to improving the crack arrest toughness. The NEU-Rolling process proposed by Northeast University can solve the existing problem of producing heavy-gauge steel by a traditional controlled rolling process.

Key words： brittle crack arrest toughness steel with thickness of 100 mm NEU-Rolling process mega container carrier microstructure

Received: 22 September 2020

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	Articles by authors
	WANG Hong-tao
	TIAN Yong
	YE Qi-bin
	WANG Zhao-dong
	WANG Guo-dong

Cite this article:

WANG Hong-tao,TIAN Yong,YE Qi-bin等. Development of heavy-gauge steel with excellent brittle crack arrest toughness for mega container carriers[J]. Iron and Steel, 2021, 56(3): 84-91.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20200486 OR http://www.chinamet.cn/Jweb_gt/EN/Y2021/V56/I3/84

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