摘要
设计并研究了一种 6 0kg级大线能量低焊接裂纹敏感性钢。试验结果表明 ,对本研究钢种而言 ,Cr和B不是理想的合金化元素 ;钢中Ti N比接近理想化学配比时组织细化 ,提高了钢材的强度和韧性 ;试验钢理想的使用组织为回火索氏体。
Synopsis This paper introduces the development of a new grade steel of 60?kg with low susceptibility to welding crack in the condition of high heat input welding. Main results of the research are described as follows: Cr and B are not the ideal micro-alloying elements for the steel; In cast the ratio of Ti/N in the steel nearly equals to its stoichiometric ratio of 3.42, a finer grain microstructure features the steel, resulting in higher strength and toughness; Tempered sorbite can be considered the ideal microstructure of the steel.
出处
《钢铁研究》
CAS
2002年第6期21-25,共5页
Research on Iron and Steel
关键词
大线能量焊接
低焊接裂纹敏感性
热处理
性能
组织
high heat input welding low susceptibility to welding crack heat treatment property microstructure
