[1]程时遐,毕宗岳,张骁勇,等.X70大变形管线钢延迟加速冷却组织和性能分析[J].焊管,2013,36(11):10-14.[doi:1001-3938(2013)11-0010-05]
 CHENG Shixia,BI Zongyue,ZHANG Xiaoyong,et al.Analysis on Microstructure and Properties of X70 Large Deformation Pipeline Steel after Delaying Accelerated Cooling[J].,2013,36(11):10-14.[doi:1001-3938(2013)11-0010-05]
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X70大变形管线钢延迟加速冷却组织和性能分析
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
36
期数:
2013年第11期
页码:
10-14
栏目:
试验与研究
出版日期:
2013-11-28

文章信息/Info

Title:
Analysis on Microstructure and Properties of X70 Large Deformation
Pipeline Steel after Delaying Accelerated Cooling
文章编号:
1001-3938(2013)11-0010-05
作者:
程时遐1毕宗岳2张骁勇1徐学利1高惠临1
(1. 西安石油大学 材料科学与工程学院,西安 710065;
2. 国家石油天然气管材工程技术研究中心,陕西 宝鸡721008)
Author(s):
CHENG Shixia1BI Zongyue2ZHANG Xiaoyong1XU Xueli1GAO Huilin1
(1. School of Materials Science and Engineering,Xi’an Shiyou University,Xi’an 710065,China;
2. National Petroleum and Gas Tubular Goods Engineering Technology Research Center,Baoji 721008,Shaanxi,China)
关键词:
X70管线钢延迟加速冷却始冷温度组织和性能
Keywords:
X70 pipeline steeldelay accelerated coolingstarting cooling temperaturemicrostructure and properties
分类号:
TE973
DOI:
1001-3938(2013)11-0010-05
文献标志码:
A
摘要:
利用热模拟、力学性能测试和材料显微分析等试验技术,研究了X70管线钢在延迟加速冷却条件下的组织与性能的变化规律。研究表明,通过延迟加速冷却,X70管线钢可获得贝氏体+铁素体(B+F)双相组织。随着始冷温度的上升,试验钢的贝氏体含量增加,铁素体含量降低,导致材料屈服强度上升,塑性下降。当始冷温度为530 ℃时,X70管线钢有较低的屈强比,较大的均匀伸长率和较大的形变强化指数,符合大变形管线钢的技术要求。
Abstract:
The change rule of microstructure and properties after delaying accelerated cooling(DAC) for X70 pipeline steel was in-vestigated through thermal simulation, mechanical property test and microscopic analysis method. The results showed that bainite + ferrite (B+F) dual-phases microstructure can be obtained by DAC. With the increasing of starting cooling temperature, the content of bainite increases and content of ferrite decreases, which lead to increase of yield strength and reduce of plasticity. When starting cooling temperature is 530 ℃, lower yield ratio, higher uniform elongation and strain hardening index can be obtained, which accord with the technical requirements of high deformation pipeline steel.

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备注/Memo

备注/Memo:
收稿日期:2013-07-10
基金项目:国家自然科学基金项目(51174165)。
作者简介:程时遐(1982—),男,湖北阳新人,硕士研究生,主要研究方向为材料的组织与性能。
更新日期/Last Update: