[1]赵 波,杨玮玮,张丽娜,等.X70管线钢焊接CCT曲线测试及分析[J].焊管,2012,35(6):56-62.[doi:1001-3938(2012)06-0056-07]
 ZHAO Bo,YANG Wei-wei,ZHANG Li-na,et al.Testing and Analysis on Welding CCT Curve of X70 Pipeline Steel[J].,2012,35(6):56-62.[doi:1001-3938(2012)06-0056-07]
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X70管线钢焊接CCT曲线测试及分析
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
35
期数:
2012年第6期
页码:
56-62
栏目:
经验交流
出版日期:
2012-06-28

文章信息/Info

Title:
Testing and Analysis on Welding CCT Curve of X70 Pipeline Steel
文章编号:
1001-3938(2012)06-0056-07
作者:
赵 波1杨玮玮1张丽娜1张 红1谷 雨2肖福仁2
(1. 渤海装备研究院钢管研究所,河北 青县 062658;
2. 燕山大学 材料科学与工程学院,河北 秦皇岛 066004)
Author(s):
ZHAO Bo1YANG Wei-wei1ZHANG Li-na1ZHANG Hong1 GU Yu2Xiao Fu-ren2
(1. CNPC Bohai Equipment Manufacturing Co., Ltd., Qingxian 062658, Hebei, China;
2. College of Materials Science and Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China)
关键词:
X70管线钢焊接CCT合金元素组织性能
Keywords:
X70 pipeline steel welding CCT alloying elements microstructure property
分类号:
TG441.8
DOI:
1001-3938(2012)06-0056-07
文献标志码:
A
摘要:
采用Gleeble-3500型热模拟试验机,测定了6种X70钢的焊接CCT曲线,分析了不同冷却条件下的组织与性能的关系,讨论了合金元素对组织和性能的影响。结果表明:当冷却速度小于1 ℃/s时,组织中出现多边形铁素体;冷却速度在1~7 ℃/s时,组织以针状铁素体或粒状贝氏体组织为主;当冷却速度大于10 ℃/s时,组织以细小的贝氏体为主。C具有抑制相变的作用,适当降低C含量,能扩大获得高韧性的冷却速度范围,并降低焊接热影响粗晶区的硬度,有利于提高钢管焊接质量。
Abstract:
The welding CCT curves of six kinds of X70 pipeline steel were tested on a Gleeble-3500 thermo-mechanical simulator, the relationship between structure and property was analyzed under different cooling conditions, and the effect of alloying elements on structure and property was discussed. The results showed that the polygonal ferrite appears in the microstructure when cooling rate is below 1 ℃/s; as cooling rate is in the range of 1~7 ℃/s, the microstructure is main as acicular ferrite or granular bainite; as cooling rate is over 10 ℃/s, the microstructure is dominated by fine bainite. C can inhibit phase transition; properly reducing C content can expand cooling rate range, and decrease hardness of HAZ coarse grain zone, it is favorable to increase welding quality of steel pipe.

参考文献/References:

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备注/Memo

备注/Memo:
作者简介:赵 波(1975—),男,学士,高级工程师,主要从事管线钢材料、焊管管件焊接工艺及设备研究。
更新日期/Last Update: