管线钢化学成分及组织对HFW钢管焊缝性能的影响  

Influence by Chemical Composition and Structure of Pipe Line-purposed Steel on Weld Property of HFW Pipe

作　　者：杨明秦 路广平[1] 朱斌燕 

机构地区：[1]渤海装备华油钢管有限公司扬州分公司,江苏扬州225128

出　　处：《钢管》2016年第3期52-57,共6页Steel Pipe

摘　　要：分析了卷板化学成分及组织对HFW钢管焊缝性能的影响机理,并提出了控制方法。分析认为:热轧卷板中C、P、S的含量和晶粒度对HFW钢管焊缝的低温冲击性能影响较大;夹杂物、带状组织也对HFW焊管焊缝冲击韧性有较大影响;微合金化元素Nb、V、Ti在焊接及中频热处理中有抑制奥氏体晶粒长大的作用。Analyzed is the mechanism of effects by the chemical composition and microstructure of the steel strip on the weld property of the HFW pipe. Accordingly, countermeasures are proposed. The analysis result reveals the following facts. The contents of C, P and S, and the grain size of the hot-rolled steel strip have obvious influence on the low temperature impact property; the inclusions and the banded structure of the steel also produce significant effect on the impact toughness of the pipe; and the micro-alloy elements like Nb, V and Ti jointly play a role in restraining growth of austenitic grains during welding and MF heat treatment processes.

关 键 词：管线钢 HFW钢管 焊缝 化学成分 夏比冲击功 韧脆转变温度 夹杂物 带状组织 

分 类 号：TG457.11[金属学及工艺—焊接]