Effect of simulated post-weld heat treatment on microstructure and mechanical  properties of Q370R steel plate for pressure vessel

doi:10.13251/j.issn.0254-6051.2023.12.014

Abstract

Abstract: Effect of process parameters of simulated post-weld heat treatment (PWHT) on microstructure and mechanical properties of normalized Q370R steel plate was studied. The results show that the microstructure of the normalized Q370R steel plate and the Q370R steel plate treated by different PWHT processes is ferrite + pearlite. Compared with that of the normalized steel, the grain size of the steel plates treated by 580 ℃×16 h (single time) and 580 ℃×8 h (twice) processes is decreased by 1 and 1.5 grades, respectively, and the band grade is decreased by 1 grade. With the increase of PWHT times and temperature, the precipitates tend to coarsen and grow. As the number of simulated post-weld heat treatments increases and the simulated post-weld heat treatment time prolongs, the strength and the impact absorbed energy of the steel plate decrease. Compared with that of the normalized steel, the tensile strength, yield strength and impact absorbed energy of the 580 ℃×16 h treated steel are reduced by 50 MPa, 30 MPa and 40 J, respectively, and that treated by 580 ℃×8 h (twice) are reduced by about 50 MPa, 45 MPa and 45 J. The impact absorbed energy of the 580 ℃×16 h (single time) and the 580 ℃×8 h (twice) treated steel plates are scattered, which is analyzed to be caused by chemical segregation.

Key words: Q370R steel plate, simulated post-weld heat treatment, heat treatment process, microstructure, mechanical properties

CLC Number:

TG142.1

Xing Mengnan, Hu Xinming, Ouyang Xin, Wang Chu, Liu Chenxi, Wang Yong. Effect of simulated post-weld heat treatment on microstructure and mechanical properties of Q370R steel plate for pressure vessel[J]. Heat Treatment of Metals, 2023, 48(12): 92-96.

References

[1]王志刚, 罗永智, 秦作伟. 压力容器现场焊后热处理技术应用现状及发展趋势[J]. 金属热处理, 2022, 47(9): 281-285.
Wang Zhigang, Luo Yongzhi, Qin Zuowei. Application status and development trend of on-site PWHT technology for pressure vessels[J]. Heat Treatment of Metals, 2022, 47(9): 281-285.
[2]胡海洋, 孙殿东, 颜秉宇, 等. 核电站用特宽特厚SA-516Gr.70钢板的开发[J]. 上海金属, 2019, 41(1): 6-8, 13.
Hu Haiyang, Sun Diandong, Yan Bingyu, et al. Development of extra-wide and extra-thick SA-516Gr.70 plate for nuclear power plant[J]. Shanghai Metals, 2019, 41(1): 6-8, 13.
[3]欧阳鑫, 胡昕明, 王储, 等. 模拟焊后热处理次数对Q370R钢板组织和性能的影响[J]. 上海金属, 2021, 43(4): 51-52.
Ou Yangxin, Hu Xinming, Wang Chu, et al. Effect of simulated postwelding heat treatment times on microstructure and properties of Q370R steel plate[J]. Shanghai Metals, 2021, 43(4): 51-52.
[4]杜金辉, 曲敬龙, 邓群, 等. GH720Li合金的铸态组织和均匀化工艺[J]. 钢铁研究学报, 2005, 17(3): 60-64.
Du Jinhui, Qu Jinglong, Deng Qun, et al. As-cast microstructure and homogenization process of alloy GH720Li[J]. Journal of Iron and Steel Research, International, 2005, 17(3): 60-64.
[5]Qu Jinglong, Bi Zhongnan, Du Jinhui, et al. Hot deformation behavior of nickel-based superalloy GH4720Li[J]. Journal of Iron and Steel Research, 2011, 18(10): 59-65.
[6]Offerman S E, Dijk N H V, Rekvwldt M T, et al. Ferrite/pearlite band formation in hot wiled medium carbon steel[J]. Metal Science Journal, 2002, 18(3): 297-303.
[7]李海方, 刘军刚. 热处理工艺对Q370R压力容器板性能的影响[J]. 宽厚板, 2010, 16(6): 30-32.
Li Haifang, Liu Jungang. Effect of heat treatment process on performance of Q370R pressure vessel plate[J]. Wide and Heavy Plate, 2010, 16(6): 30-32.
[8]潘金生, 田洪波, 仝健民. 材料科学基础[M]. 北京: 清华大学出版社, 2011.
[9]Thompson W S, Howell R P. Factors influencing ferrite/pearlite banding and origin of large pearlite nodules in a hypoeutectoid plate steel[J]. Materials Science and Technology, 2013, 8(9): 777-784.
[10]Kirkaldy S J, Forstmann D V J, Brigham J R. Simulation of banding in steels[J]. Canadian Metallurgical Quarterly, 2013, 1(1).
[11]顾天浩. 新型锅炉和压力容器用钢板[J]. 上海金属, 1989(4): 49.
Gu Tianhao. New steel plates for boilers and pressure vessels[J]. Shanghai Metals, 1989(4): 49.
[12]董子尧, 王睿, 康燕, 等. 高温均匀化处理对1.3C-5Cr-0.7Mo-0.6V钢中碳化物形貌及力学性能的影响[J]. 金属热处理, 2020, 45(12): 69-74.
Dong Ziyao, Wang Rui, Kang Yan, et al. Effect of high temperature homogenization on carbide morphology and mechanical properties of 1.3C-5Cr-0.7Mo-0.6V steel[J]. Heat Treatment of Metals, 2020, 45(12): 69-74.

[1]	Yuan Zhizhong, Wang Mengfei, Zhang Bocheng, Duan Xubin, Li Biaomin, Yang Haifeng, Luo Rui, Cheng Xiaonong. Heat treatment for toughening technology of cold working die steel SKD11 [J]. Heat Treatment of Metals, 2023, 48(9): 1-7.
[2]	Sun Bo, Nie Jiamin, Li Xiaodan, He Changshu. Effects of forced cooling and low temperature aging on microstructure and mechanical properties of FSW joint of 2198-T3/7A04-T6 dissimilar aluminum alloy [J]. Heat Treatment of Metals, 2023, 48(9): 8-13.
[3]	Cui Yi, Cui Jihong, Wang Yan, Zhang Yunfei, Yu Feng, Zhao Yingli, Cao Wenquan. Influence of quenching process on microstructure and wear resistance of GCr4Mo4V steel [J]. Heat Treatment of Metals, 2023, 48(9): 23-29.
[4]	Wang Yi, Han Jie, Liu Chao, Deng Lingrui, Li Hui, Xu Rongchang. Influence of DQ-T process on microstructure and properties of 1000 MPa high strength steel [J]. Heat Treatment of Metals, 2023, 48(9): 30-34.
[5]	Chen Yanrui, Lü Ke, Li Yan, Ren Shaoqing, Zhao Mingjing, Dong Rui, Ding Wei. Effect of sintering temperature on microstructure and magnetic properties of 2∶17H type high-performance SmCo alloy [J]. Heat Treatment of Metals, 2023, 48(9): 35-41.
[6]	Shao Xu, Pang Jingyu, Ji Yu, Tang Guangquan, Liu Wenqiang, Cheng Lufan, Li Wen. Effect of hot working process on microstructure and properties of Nb₃₇Ti₂₀Al₁₅Zr₁₅Hf₅Ta₅Mo₂W₁ refractory high-entropy alloy [J]. Heat Treatment of Metals, 2023, 48(9): 42-47.
[7]	Zeng Yongmou, Liu Ying, Liu Ziyuan, Hu Menghan, Cao Yu. Effect of annealing temperature and cold deformation on microstructure and properties of 3003 aluminum alloy plate for power battery shell [J]. Heat Treatment of Metals, 2023, 48(9): 70-74.
[8]	Ming Zhangsheng, Zhao Jie, Li Kejian, Cao Pengjun, Zhu Bin, Feng Yi. Application prospect of ultra high strength and toughness steel prepared by intensive quenching process [J]. Heat Treatment of Metals, 2023, 48(9): 81-87.
[9]	Mao Fuxiang, Jiang Shaolong, Liu Wei, Shu Wenwu, Wang Lintao. Effect of heat treatment process on microstructure and properties of valve alloy NCF3015 [J]. Heat Treatment of Metals, 2023, 48(9): 92-94.
[10]	Han Weisong, Du Feng, Li Jianfeng, Zhu Baohui, Shen Lihua, Liu Yi, Wang Peng. Effect of deformation on mechanical properties of Ti80G alloy [J]. Heat Treatment of Metals, 2023, 48(9): 95-98.
[11]	Song Cao, Wang Xiaodong, Bao Xirong, Chen Lin, Tang Xuejiao. Effect of Ce on microstructure and mechanical properties of 30MnNbRE steel after quenching and tempering [J]. Heat Treatment of Metals, 2023, 48(9): 143-149.
[12]	Li Wengang, Chui Pengfei, Cheng Zunpeng, Li Chunmei, Jing Ran, Li Jianghua, Liao Zhongni. Effect of boron content on microstructure and properties of Ti-Zr-Nb-B alloys [J]. Heat Treatment of Metals, 2023, 48(9): 157-164.
[13]	Dai Zhao, Guo Zhi, Long Xiaoyan, Feng Xiaoyong, Liu Wei, Zhang Fucheng, Li Yanguo. Effect of Si content on microstructure and properties of high carbon bainitic steel [J]. Heat Treatment of Metals, 2023, 48(9): 165-173.
[14]	Xie Shangheng, Sun Youping, Zhu Jiaxin, Fang Dejun. Effect of trace Zr on microstructure and mechanical properties of deep cryogenic rolled Al-Cu-Mg alloy [J]. Heat Treatment of Metals, 2023, 48(9): 174-179.
[15]	Wang Yinghu. Effect of sulfur content on sulfide morphologies and properties of Y12Cr18Ni9 free-cutting steel [J]. Heat Treatment of Metals, 2023, 48(9): 183-190.

Effect of simulated post-weld heat treatment on microstructure and mechanical properties of Q370R steel plate for pressure vessel

PDF

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments