[1]王东超,宗秋丽,王胜利,等.基于应变设计X70M钢落锤断口成因分析[J].焊管,2014,37(6):53-57.[doi:1001-3938(2014)06-0053-05]
 WANG Dongchao,ZONG Qiuli,WANG Shengli,et al.Cause Analysis on X70M DWTT Fracture Based on Strain Design Material[J].,2014,37(6):53-57.[doi:1001-3938(2014)06-0053-05]
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基于应变设计X70M钢落锤断口成因分析
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
37
期数:
2014年第6期
页码:
53-57
栏目:
经验交流
出版日期:
2014-06-28

文章信息/Info

Title:
Cause Analysis on X70M DWTT Fracture Based on Strain Design Material
文章编号:
1001-3938(2014)06-0053-05
作者:
王东超1宗秋丽2王胜利2梁 栋1
(1. 中国石油渤海装备巨龙钢管公司,河北 青县  062658;
2. 中国石油渤海装备华油钢管公司,河北 青县  062658)
Author(s):
WANG Dongchao1 ZONG Qiuli2 WANG Shengli2 LIANG Dong1
(1.CNPC Bohai Equipment Julong Steel Pipe Co., Ltd., Qingxian 062658, Hebei, China;
2.CNPC Bohai Equipment Huayou Steel Pipe Co., Ltd., Qingxian 062658, Hebei, China)
关键词:
基于应变设计落锤断口带状组织双相组织
Keywords:
based on strain design DWTT banded structure dual phase structure
分类号:
TG113.25
DOI:
1001-3938(2014)06-0053-05
文献标志码:
B
摘要:
采用金相组织分析及能谱分析等方法对基于应变设计材料X70M落锤断口特殊形貌进行了研究分析。分析结果表明,该种材料的硬相及软相双相组织分布不均匀,且壁厚中心带状组织区域存在大量Nb,Ti和Mn的偏聚,在受到较大撕裂力的情况下,材料从带状组织区域起裂,并沿硬相贝氏体组织扩展,但由于材料内部具有大量细晶粒的多边形铁素体组织,因此整体韧性较好,能够得到有效的止裂,于是形成了特殊的落锤断口形貌。
Abstract:
In this article, the special morphology of X70M DWTT fracture based on strain design material was analyzed by means of metallographic structure analysis and energy spectrum analysis. The results showed that the hard and soft phase structure of the above material distribute unevenly, and a large number of segregation of Nb, Ti and Mn exist in wall thickness center banded structure. Under the condition of large tear force, the material started to crack from banded structure and extended along the hard phase bainite organization. Because a large number of fine grained polygonal ferrite existed in material interior, so it is with good toughness, the crack arrest can be received effectively, and formed special DWTT fracture morphology.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2014-03-07
作者简介:王东超(1981—),男,硕士,工程师,主要从事金属材料的理化检测技术工作。
更新日期/Last Update: