大线能量低焊接裂纹敏感性钢性能及组织研究  

RESEARCH ON PROPERTIES AND MICROSTRUCTURE OF HIGH HEAT INPUT WELDING STEEL WITH LOW SUSCEPTIBILITY TO WELDING CRACK

作　　者：陈晓[1] 卜勇[1] 张莉芹[2] 袁泽喜[2] 

机构地区：[1]武汉钢铁集团公司 [2]武汉科技大学

出　　处：《钢铁研究》2002年第6期21-25,共5页Research on Iron and Steel

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.

关 键 词：大线能量焊接 低焊接裂纹敏感性 热处理 性能 组织 

分 类 号：TG142[一般工业技术—材料科学与工程]