Nb含量和变形量对水电站用800 MPa高强钢淬火再加热奥氏体晶粒尺寸及其分布的影响

doi:10.13251/j.issn.0254-6051.2023.04.001

金属热处理 ›› 2023, Vol. 48 ›› Issue (4): 1-9.DOI: 10.13251/j.issn.0254-6051.2023.04.001

• 材料研究 • 下一篇

Nb含量和变形量对水电站用800 MPa高强钢淬火再加热奥氏体晶粒尺寸及其分布的影响

邹扬^1,2, 张苏渊², 张学峰³, 张跃飞³, 王坤³, 刘国权¹

1.北京科技大学新金属材料国家重点实验室, 北京 100083;
2.首钢集团有限公司技术研究院,北京 100043;
3.首钢京唐钢铁联合有限责任公司, 河北唐山 063200

收稿日期:2022-12-28 修回日期:2023-01-17 发布日期:2023-05-27
通讯作者: 刘国权,教授,博士生导师,博士,E-mail:g.liu@ustb.edu.cn
作者简介:邹扬(1982—),男,正高级工程师,博士研究生,主要研究方向为中厚板品种及生产技术,E-mail:13810044453@163.com。

Effects of Nb content and deformation on reheated austenite grain size and distribution of 800 MPa high strength steel for hydropower station before quenching

Zou Yang^1,2, Zhang Suyuan², Zhang Xuefeng³, Zhang Yuefei³, Wang Kun³, Liu Guoquan¹

1. State Key Laboratory of Advanced Metals and Materials, Beijing University of Science and Technology, Beijing 100083, China;
2. Research Institute of Technology, Shougang Group Co., Ltd., Beijing 100043, China;
3. Shougang Jingtang Iron and Steel United Co., Ltd., Tangshan Hebei 063200, China

Received:2022-12-28 Revised:2023-01-17 Published:2023-05-27

摘要/Abstract

摘要： 利用Gleeble 3500热/力模拟试验机,通过1000 ℃+820 ℃两阶段热变形+900 ℃淬火再加热联合模拟试验,研究了Nb含量和不同热变形量对水电站用800 MPa级高强度试验钢淬火再加热晶粒尺寸及其分布的影响规律,并通过透射电镜(TEM)对形变诱导析出的Nb(C,N)的粒子尺寸、分布进行了观测。结果表明,热变形态奥氏体晶粒尺寸(D)对于再加热淬火态奥氏体晶粒尺寸(D′) 具有重要遗传性影响,二者以及900 ℃ 再加热保温时间t之间存在函数关系D′=(1.0057D-6.9785)×(t/300)^0.215,用于预测800 MPa高强钢再加热淬火态晶粒尺寸时具有较高精度。增加Nb含量可同时细化晶粒尺寸D和D′,并改善晶粒尺寸分布、显著降低个别粗大晶粒出现的概率。在常用的淬火加热制度下,添加0.03%Nb和0.05%Nb的晶粒细化效果基本相当,兼顾其经济性应优选0.03%Nb。TEM观测结果表明,含Nb变形态试样中存在大量10~30 nm 尺寸的Nb(C,N) 粒子,其数量和密度随Nb含量增加而增加,但粒子尺寸并未随之明显增大。通过热力学计算并综合粒子尺寸和形成时间推断,这些Nb(C,N)粒子在1000 ℃ 形变诱导析出。

关键词: 水电站用高强度钢, Nb微合金化, 热变形, 淬火再加热, 晶粒细化

Abstract: Effects of Nb content and hot deformation amount on austenite grain size and distribution of 800 MPa grade high strength tested steel for hydropower station during reheating for quenching were studied by using a Gleeble 3500 testing machine to carry out the combined simulation test of two-stage deformation at 1000 ℃+820 ℃ and subsequent reheating at 900 ℃ for different time, and the particle size and distribution of deformation-induced Nb(C,N) precipitates were observed by transmission electron microscopy. The results show that the grain size of as-deformed austenite (D) has an important heredity effect on the grain size of as-reheated austenite (D′), and there is a functional relationship between the two and the reheated holding time (t) at 900 ℃: D′=(1.0057D-6.9785)×(t/300)^0.215, which can be used to predict the grain size (D′) for the 800 MPa high-strength steel with high accuracy. The increase of Nb content reduces both the grain sizes D and D′, and also improves grain size distributions and reduces the probability of individual coarse grains. Under the common industrial quenching heating system, adding 0.03%Nb and 0.05%Nb have very similar grain refining effect, then considering its economy, adding 0.03%Nb is preferred. The TEM observation results show that in the as-deformed specimens, a large number of Nb(C,N) particles with the size of 10-30 nm are observed, the number and density of particles increase with the increase of Nb content, but the particle size does not increase significantly. Based on thermodynamic calculation and comprehensive consideration of particle size and formation time, it is inferred that these particles are deformation-inducted Nb(C,N) precipitates formed at 1000 ℃.

Key words: high strength steel for hydropower station, Nb microalloying, hot deformation, reheating for quenching, grain refining

中图分类号:

TG156.1

邹扬, 张苏渊, 张学峰, 张跃飞, 王坤, 刘国权. Nb含量和变形量对水电站用800 MPa高强钢淬火再加热奥氏体晶粒尺寸及其分布的影响[J]. 金属热处理, 2023, 48(4): 1-9.

Zou Yang, Zhang Suyuan, Zhang Xuefeng, Zhang Yuefei, Wang Kun, Liu Guoquan. Effects of Nb content and deformation on reheated austenite grain size and distribution of 800 MPa high strength steel for hydropower station before quenching[J]. Heat Treatment of Metals, 2023, 48(4): 1-9.

参考文献

[1]李大东, 林剑东, 何其平. 水电站16Mn钢焊接压力管道断裂原因[J]. 钢铁钒钛, 1997 (2): 18-25
Li Dadong, Lin Jiandong, He Qiping. Fracture analysis of welded 16Mn steel penstock used for hydroelectric power plant[J]. Iron Steel Vanadium Titanium, 1997 (2): 18-25
[2]杨江琪. 含局部减薄水电站压力钢管塑性失效机理和极限承载力研究[D]. 南宁: 广西大学, 2017.
Yang Jiangqi. Investigation on plastic failure mechanism and ultimate
load bearing capacity of local wall-thinning penstocks[D]. Nanning: Guangxi University, 2017.
[3]Wang C, Wang M, Shi J, et al. Effect of microstructural refinement on the toughness of low carbon martensitic steel[J]. Scripta Materialia, 2008, 58(6): 492-495.
[4]Wang C, Wang M, Jie S, et al. Effect of microstructure refinement on the strength and toughness of low alloy martensitic steel[J]. Journal of Materials Science and Technology, 2007, 23(5): 659-664.
[5]Li X, Lu G, Wang Q, et al. The effects of prior austenite grain refinement on strength and toughness of high-strength low-alloy steel[J]. Metals, 2022, 12(1): 28.
[6]Celada-Casero C, Sietsma J, Santofimia M J. The role of the austenite grain size in the martensitic transformation in low carbon steels[J]. Materials and Design, 2019, 167: 107625.
[7]CITIC-CBMM中信微合金化技术中心. 如何用铌改善钢的性能: 含铌钢生产技术[M]. 北京: 冶金工业出版社, 2007.
[8]Beck P A, Kremer J C,Demer L J, et al. Grain growth in high-purity aluminium-magnesium alloy[J]. Metallurgical and Materials Transactions, 1948, 175: 372-394.
[9]雍岐龙. 钢铁材料中的第二相[M]. 北京: 冶金工业出版社, 2006.
[10]Dutta B, Palmiere E J, Sellars C M. Modelling the kinetics of strain induced precipitation in Nb microalloyed steels[J]. Acta Materialia, 2001, 49(5): 785-794.

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Nb含量和变形量对水电站用800 MPa高强钢淬火再加热奥氏体晶粒尺寸及其分布的影响

Effects of Nb content and deformation on reheated austenite grain size and distribution of 800 MPa high strength steel for hydropower station before quenching

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