Nb、V对X80热煨弯管用钢组织与性能的影响

安涛; 刘文月; 李天怡; 臧岩; 李江文; 孙美慧

doi:10.7513/j.issn.1004-7638.2025.01.025

Nb、V对X80热煨弯管用钢组织与性能的影响

doi: 10.7513/j.issn.1004-7638.2025.01.025

安涛^{1, 2,},
刘文月^{1, 2},
李天怡^{1, 2},
臧岩^{1, 2},
李江文^{1, 2},
孙美慧^{1, 2}

1.
海洋装备用金属材料及其应用国家重点实验室, 辽宁鞍山 114009
2.
鞍钢集团北京研究院有限公司, 北京 102200

详细信息

作者简介:
安涛，1995年出生，女，山西临汾人，工程师，硕士研究生，主要从事中厚板原型钢微观组织表征研究，E-mail：AnTao202372@outlook.com

中图分类号: TF76，TG142
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出版历程
- 收稿日期: 2023-09-17
- 刊出日期: 2025-02-27

Effect of Nb and V on the microstructures and properties of X80 hot pipe steel

AN Tao^{1, 2
,},
LIU Wenyue^{1, 2},
LI Tianyi^{1, 2},
ZANG Yan^{1, 2},
LI Jiangwen^{1, 2},
SUN Meihui^{1, 2}

1.
State Key Laboratory of Metal Materials for Marine Equipment and Application, Anshan 114009, Liaoning, China
2.
Ansteel Beijing Research Institute Co., Ltd., Beijing 102200, China

摘要

摘要: 设计在X80热煨弯管用钢中添加不同含量的微合金元素Nb、V，并采用OM、SEM、TEM进行试样微观组织和析出相的观察，利用拉伸试验机和冲击试验机进行力学性能的测试，应用Thermo-calc软件进行试验钢热力学计算。结果表明：减少试验钢中的Nb或V含量后，试验钢的固溶强化分量降低；纳米析出相的体积分数增加，平均直径减小，试验钢的析出强化分量提高；细晶强化分量相差不大，最终试验钢的屈服强度和抗拉强度降低，而试验钢在−20 ℃的冲击功显著提高。研究证实，添加约0.02%Nb、0.04%V元素有助于改善X80热煨弯管用钢材料的强韧性匹配。
- 热煨弯管 /
- Nb、V复合微合金化 /
- 微观组织 /
- 力学性能 /
- 析出相
Abstract: In this study, different contents of micro-alloying elements Nb and V were added to X80 pipeline steel. OM, SEM and TEM were used to observe the microstructures and precipitates. Tensile tests and Charpy tests were conducted to obtain the mechanical properties. Thermo-calc software was used for phase transformation calculation. The results showed that after reducing the Nb or V contents in the tested steel, the ratio of solid solution strengthening of the steel decreased; the volume fractions of the nano precipitates increased; the average diameters of the nano precipitates decreased; the ratio of precipitation strengthening of the tested steel increased; and the ratio of grain refinement strengthening of the steel was not obvious. Finally the strength of the tested steel was reduced, while the impact energy at -20 ℃ was significantly increased. This research has confirmed that adding appropriate amounts of 0.02%Nb and 0.04%V elements can improve the strength and toughness matching of materials.
- hot heat bending pipe /
- Nb, V composite microalloying /
- microstructure /
- mechanical properties /
- precipitates

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图 1 06Nb04V试验钢的热力学平衡相图（a）及局部放大图（b）

Figure 1. Temperature dependence of the mole fraction of equilibrium phases in the 06Nb04V steel (a) and partial enlarged view (b)

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图 2 试验钢的SEM形貌

Figure 2. SEM photos of the investigated steels

（a）06Nb1V；（b）02Nb1V；（c）06Nb04V

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图 3 试验钢的EBSD表征

Figure 3. EBSD analysis of the investigated steels

IPF：（a）~（c）；GB：（d）02Nb1V ；（e）06Nb04V；（f）06Nb1V

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图 4 06Nb1V试验钢的形貌及析出相TEM表征

（a）显微组织；（b）碳萃取复型；（c）~（f）析出相的HAADF相及其EDS面扫

Figure 4. TEM micrographs of the precipitated particles in 06Nb1V steels

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图 5 02Nb1 V试验钢的形貌及析出相TEM表征

（a）显微组织；（b）碳萃取复型；（c）~（f）析出相的HAADF相及其EDS面扫

Figure 5. TEM micrographs of the precipitated particles in 02Nb1V steels

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图 6 06Nb04V试验钢的形貌及析出相TEM表征

（a）显微组织；（b）碳萃取复型；（c）~（d）析出相的HAADF相及其EDS面扫

Figure 6. TEM micrographs of the precipitated particles in 06Nb04V steels

下载: 全尺寸图片幻灯片

表 1 试验钢化学成分

Table 1. Chemical compositions of three tested steels %

试验钢	C	Si	Mn+Cr+Mo	Ni+Cu	Ti	Nb	V	Al	Fe
06Nb1V	0.07	0.25	2.2	0.3	0.03	0.06	0.1	0.03	Bal.
02Nb1V	0.07	0.25	2.2	0.3	0.03	0.02	0.1	0.03	Bal.
06Nb04V	0.07	0.25	2.2	0.3	0.03	0.06	0.04	0.03	Bal.

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表 2 试验钢的生产工艺参数

Table 2. Production process parameters of the investigated steels

奥氏体化温度/℃	奥氏体化时间/min	冷却方式	回火温度/℃	回火时间/min
950	40	水冷	600	60

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表 3 纳米析出相的统计结果

Table 3. Statistical results of the precipitated particles

试验钢	体积分数/%	析出相平均尺寸/nm
06Nb1V	0.30	31.86
02Nb1V	0.07	20.20
06Nb04V	0.54	23.87

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表 4 试验钢的力学性能

Table 4. Mechanical properties of the investigated steels

试验钢	屈服强度/MPa	抗拉强度/MPa	断后延伸率/%	冲击功/J
06Nb1V	695	779	17.96	166
02Nb1V	643	712	20.60	206
06Nb04V	644	718	16.86	304

下载: 导出CSV

参考文献(10)

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