超低碳贝氏体钢及其焊接特性  

ULTRA-LOW CARBON BAINITIC STEEL AND ITS WELDING

作　　者：马成勇[1] 田志凌[1] 杜则裕[2] 刘吉斌[3] 

机构地区：[1]钢铁研究总院 [2]天津大学 [3]武汉钢铁(集团)公司

出　　处：《钢铁》2002年第6期68-73,共6页Iron and Steel

基　　金：国家重点基础研究规划 ( 973)项目资助 ( 19980 6 15 0 0 )

摘　　要：超低碳贝氏体 (U L CB)钢采用极低的碳含量 ,充分利用 Mn、 Mo、Nb、Ni、Ti、B等元素的合金化作用 ,通过 U L CB组织获得了高的强韧性及优良的低温韧性 ;由于 U L CB钢碳含量极低 ,焊接性优良 ,焊接热影响区 (HAZ)韧性明显改善 ,裂纹敏感性显著降低。UL CB钢焊接时 ,焊缝金属是焊接接头的薄弱环节 ,研制开发超低碳贝氏体焊接材料是实现 UL CB钢焊接的关键环节。With ultra-low carbon content and fully use of alloying elements, such as Mn, Mo, Nb, Ni, Ti and B, the ultra-low carbon bainitic (ULCB) microstructure of super strength and excellent low temperature toughness is obtained. Due to extremely low carbon content, the excellent weldability, greatly improved toughness of the heat affected zone (HAZ) and suppressed cracking susceptibility are observed for ULCB steels. However, the properties of the weld metal can hardly be enhanced to the same level as that of the base metal. Thus, the weld becomes a weak point in a welded joint and the development of tough and cracking-resistant ultra-low carbon welding consumables becomes a key solution for welding ULCB steel.

关 键 词：超低碳贝氏体钢 ULCB钢 强韧性 低温韧性 焊接性 焊接材料 

分 类 号：TG142[一般工业技术—材料科学与工程]