Study on microstructure and low-temperature impact toughness of deposited metal form covered electrodes for 440 MPa grade high-strength steel

ZENG Daoping; ZHENG Shaoxian; AN Tongbang; DAI Haiyang; MA Chengyong

doi:10.12073/j.hjxb.20230318002

TRANSACTIONS OF THE CHINA WELDING INSTITUTION > 2024 > 45(3): 120-128. > DOI: 10.12073/j.hjxb.20230318002

ZENG Daoping, ZHENG Shaoxian, AN Tongbang, DAI Haiyang, MA Chengyong. Study on microstructure and low-temperature impact toughness of deposited metal form covered electrodes for 440 MPa grade high-strength steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2024, 45(3): 120-128. DOI: 10.12073/j.hjxb.20230318002

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Study on microstructure and low-temperature impact toughness of deposited metal form covered electrodes for 440 MPa grade high-strength steel

1.
Lanzhou Jiaotong University, Lanzhou, 730070, China
2.
Welding Research Institute, Central Iron and Steel Research Institute, Beijing, 100081, China

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Received Date: March 17, 2023
Available Online: March 04, 2024

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Abstract

Abstract

To meet the welding material requirements of 440 MPa grade high-strength steel, three types of covered electrodes have been developed, and the welding test of deposited metal was carried out. The microstructure and low-temperature impact toughness of deposited metal were analyzed by means of the optical microscope, scanning electron microscope, and transmission electron microscope. The results show that with the increase of Mn, Ni, Cr, and Cu contents, the average impact absorption energy of the deposited metal at −40 ℃ gradually increases from 35.7 J to 96.3 J, and the low-temperature impact toughness gradually increases; With the increase of Mn, Ni, Cr and Cu contents, although the content of M₂₃C₆ type carbide in the deposited metals gradually increases, the CCT curve of the deposited metals gradually moves to the right, and the transformation temperature gradually decreases, which makes the content of acicular ferrite gradually increase, the size of ferrite lath gradually decreases, and the interlaced distribution trend between ferrite lath gradually increases, and the content and size of M-A constituent gradually decrease, which is the main reason for the gradual improvement of low-temperature impact toughness; The outer layer of inclusions in the deposited metal containing Cu can form CuS, making it easier for acicular ferrite to form nuclei, which is conducive to improving low-temperature impact toughness.
- 440 MPa grade high-strength steel,
- deposited metal,
- acicular ferrite,
- M-A constituent,
- low-temperature impact toughness

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References

[1]	张文钺. 焊接冶金学[M]. 北京: 机械工程出版社, 2004. Zhang Wenyue. Welding metallurgy[M]. Beijing: Mechanical Engineering Press, 2004.
[2]	左丽萍. 低合金高强钢在液压支架的应用分析[J]. 装备制造, 2010, 19(1): 221 − 223. Zuo Liping. Application analysis of low alloy high strength steel in hydraulic support[J]. China Equipment, 2010, 19(1): 221 − 223.
[3]	王学林, 董利明, 杨玮玮, 等. Mn/Ni/Mo配比对K65管线钢焊缝金属组织与力学性能的影响[J]. 金属学报, 2016, 52(6): 649 − 660. Wang Xuelin, Dong Liming, Yang Weiwei, et al. Effect of Mn、Ni、Mo proportion on microstructure and mechanical properties of weld metal of K65 pipeline steel[J]. Acta Metallurgica Sinica, 2016, 52(6): 649 − 660.
[4]	Avazkonandrh-gharavol M H, Haddad-sazevar M, Haerian A A. Effect of chromium content on the microstructure and mechanical properties of multipass MMA, low alloy steel weld metal[J]. Journal of Material Science, 2009, 44(1): 186 − 197. doi: 10.1007/s10853-008-3103-2
[5]	肖晓明, 彭云, 杨帅, 等. 铬含量对耐候钢熔敷金属韧性的影响[J]. 焊接学报, 2014, 35(5): 26 − 30 + 114. Xiao Xiaoming, Peng Yun, Yang Shuai, et al. Effect of Cr content on deposited metal toughness of weathering steel[J]. Transaction of the China Welding Institution, 2014, 35(5): 26 − 30 + 114.
[6]	Huang G, Wan X L, Wu K M, et al. Effect of Cu addition on microstructure and impact toughness in the simulated coarse-grained heat-affected zone of high-strength low-alloy steels[J]. Materials Science and Technology, 2017, 33(5): 602 − 614. doi: 10.1080/02670836.2016.1238647
[7]	Yi J L, Niu B, Chen R, et al. Influence of Cu Content on Microstructure and Corrosion Behavior of Flux-Cored Arc-Welded Metal with 10CrNi3MoV Steel[J]. Internation Journal of Electrochemical Science, 2019, 2014: 5984 − 5999.
[8]	左月, 康举, 安同邦, 等. 核用460 MPa级高强钢焊条熔敷金属强韧化机理研究[J]. 压力容器, 2021, 38(12): 7-14. Zuo Yue, Kang Ju, An Tongbang, et al. Study on strengthening and toughening mechanism of deposited metal from covered electrodes for nuclear 460 MPa high strength steel. Pressure Vessel Technology, 2021, 38(12): 7-14.
[9]	张亚运, 魏金山, 安同邦, 等. 热输入对船用高强药芯焊丝熔敷金属低温韧性的影响[J]. 材料研究学报, 2018, 32(4): 309 − 314. doi: 10.11901/1005.3093.2017.527 Zhang Yayun, Wei Jinshan, An Tongbang, et al. Effect of heat input on low-temperature flexibility of weld seams of a hull steel via gas-shielded welding with filler of marine high strength flux-cored wire[J]. China Journal of Materials Research, 2018, 32(4): 309 − 314. doi: 10.11901/1005.3093.2017.527
[10]	黄刚. 合金元素对高强度钢焊接热影响区微观组织和韧性的影响[D]. 武汉: 武汉科技大学, 2019. Huang gang. The influence of alloying elements on the microstructure and toughness of the welding heat affected zone of high-strength steel[D]. Wuhan: Wuhan University of Science and Technology, 2019.
[11]	余圣甫, 张远钦, 吕卫文, 等. CuS在针状铁素体形核过程中的作用[J]. 焊接学报, 2002, 23(4): 72 − 76 + 102-103. doi: 10.3321/j.issn:0253-360X.2002.04.020 Yu Shengfu, Zhang Yuanqin, Lu Weiwen, et al. Role of CuS in Formation Nucleation of Acicular Ferrite[J]. Journal of Material Science, 2002, 23(4): 72 − 76 + 102-103. doi: 10.3321/j.issn:0253-360X.2002.04.020
[12]	彭云, 王爱华, 肖红军, 等. Cu对690 MPa级HSLA钢熔敷金属组织形成和细化的作用[J]. 金属学报, 2012, 48(11): 1281 − 1289. doi: 10.3724/SP.J.1037.2012.00084 Peng Yun, Wang Aihua, Xiao Hongjun, et al. Effect of Cu on microstructure forming and refining of weld metal in 690 MPa grade HSLA steel[J]. Acta Metallurgica Sinica, 2012, 48(11): 1281 − 1289. doi: 10.3724/SP.J.1037.2012.00084
[13]	冯耀荣. 管线钢显微组织的分析与鉴别[M]. 西安: 陕西科学技术出版社, 2008. Feng Yaorong. Analysis and identification of microstructure in pipeline steel[M]. Xian: Shaanxi Science and Technology Press, 2008.
[14]	赵乃勤. 合金固态相变[M]. 长沙: 中南大学出版社, 2008. Zhao Naiqin. Solid state phase transformation of alloys[M]. Changsha: Central South University Press, 2008.
[15]	曾道平, 安同邦, 郑韶先, 等. 热输入对船用440 MPa级低合金高强度钢焊缝组织及性能的影响[J]. 焊接学报, 2023, 44(8): 74 − 82 + 133. doi: 10.12073/j.hjxb.20220911001 Zeng Daoping, An Tongbang, Zheng Shaoxian, et al. Effect of heat input on microstructure and properties of weld seam of marine 440 MPa grade HSLA steel[J]. Transaction of the China Welding Institution, 2023, 44(8): 74 − 82 + 133. doi: 10.12073/j.hjxb.20220911001
[16]	文明月. 焊接热循环对Fe-Cr-Ni-Mo系高强钢组织与力学性能的影响[D]. 合肥: 中国科学技术大学, 2018. Wen Mingyue. The effect of welding thermal cycle on the microstructure and mechanical properties of Fe-Cr-Ni-Mo high-strength steel[D]. Hefei: University of Science and Technology of China, 2018.
[17]	乔丽学, 余刚, 董浩, 等. 热处理工艺对M390/304 CMT焊接接头微观组织及力学性能的影响[J]. 焊接学报, 2023, 40(1): 49 − 56 + 131. doi: 10.12073/j.hjxb.20220325011 Jiao Lixue, Yu Gang, Dong Hao, et al. The influence of heat treatment process on the microstructure and mechanical properties of M390/304 CMT welded joints[J]. Transaction of the China Welding Institution., 2023, 40(1): 49 − 56 + 131. doi: 10.12073/j.hjxb.20220325011

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