[1]何小东,王月霞,吴 双,等.预热温度和冷却速度对X80大变形管线钢焊接粗晶区性能的影响[J].焊管,2012,35(10):10-15.[doi:1001-3938(2012)10-0010-06]
 HE Xiaodong,WANG Yuexia,WU Shuang,et al.Effect of Pre-heat Temperature and Cooling Rate on Properties in Coarse Grain Heat-affected Zone for X80 High Deformability Pipeline Steel[J].,2012,35(10):10-15.[doi:1001-3938(2012)10-0010-06]
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预热温度和冷却速度对X80大变形管线钢焊接粗晶区性能的影响
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
35
期数:
2012年第10期
页码:
10-15
栏目:
试验与研究
出版日期:
2012-10-28

文章信息/Info

Title:
Effect of Pre-heat Temperature and Cooling Rate on Properties in Coarse Grain Heat-affected Zone for X80 High Deformability Pipeline Steel
文章编号:
1001-3938(2012)10-0010-06
作者:
何小东王月霞吴 双仝 珂朱丽霞蔺卫平
(中国石油集团石油管工程技术研究院,西安 710065)
Author(s):
HE XiaodongWANG Yuexia WU Shuang TONG Ke ZHU Lixia LIN Weiping
(CNPC Tubular Goods Research Institute, Xi’an 710065, China)
关键词:
X80抗大变形管线钢粗晶区冷裂纹敏感性断裂韧性插销试验热模拟
Keywords:
X80 high deformability pipeline steel coarse grain zonecold cracking sensibility fracture toughness implant test thermal simulation
分类号:
TG406; TG142.33
DOI:
1001-3938(2012)10-0010-06
文献标志码:
A
摘要:
采用插销试验和热模拟技术研究了不同预热温度和冷却速度对X80抗大变形管线钢焊接粗晶区的冷裂纹敏感性及组织性能的影响。试验结果表明,随着预热温度的升高,X80抗大变形管线钢焊接粗晶区的临界断裂应力提高,抗冷裂纹敏感性能力增强;当预热温度达到150 ℃时,粗晶区的冷裂纹敏感性变得很小,断口形貌为韧窝状;随着冷却速度的增加,X80抗大变形管线钢焊接粗晶区的显微硬度升高,而断裂韧性由高到低,再由低到高,当冷却速度达到2 ~25 ℃/s时,粗晶区具有优良的断裂韧性;当进一步增大冷却速度时,由于板条马氏体的形成,粗晶区断裂韧性迅速降低。
Abstract:
Implant test and thermal simulating technology were used to study the effect of pre-heat temperature and cooling rate on cold cracking sensibility and structure and properties in coarse grain heat-affected zone(CGHAZ)for X80 high deformability pipeline steel. The experimental results showed that with the pre-heat temperature increasing, the critical fracture stress and the resistance of cold cracking in welding coarse zone were enhanced. When the pre-heat temperature reached 150 ℃, the sensibility of cold cracking became so small, and the fracture surface presented toughness cavity. With the cooling rate increasing, the micro-hardness in CGHAZ became greater, but the fracture toughness was from high to low, and then from low to high. When the cooling rate achieved to 2 ~ 25 ℃/s, the CGHAZ showed excellent toughness. However, when the cooling rate was increased further, the fracture toughness reduced rapidly because of martensite formation.

参考文献/References:

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备注/Memo

备注/Memo:
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作者简介:何小东(1970—),男,硕士,高级工程师,主要从事石油管工程焊接及测试技术研究工作 。
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