Welding feasibility analysis of arc preheating scheme for ITER anaerobic copper TIG welding

WANG Hua; JIN Jing; HAO Qiangwang

doi:10.12073/j.hjxb.20220325005

TRANSACTIONS OF THE CHINA WELDING INSTITUTION > 2023 > 44(9): 113-117. > DOI: 10.12073/j.hjxb.20220325005

WANG Hua, JIN Jing, HAO Qiangwang. Welding feasibility analysis of arc preheating scheme for ITER anaerobic copper TIG welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2023, 44(9): 113-117. DOI: 10.12073/j.hjxb.20220325005

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Welding feasibility analysis of arc preheating scheme for ITER anaerobic copper TIG welding

1.
Hefei Keju High Technology Co., Ltd., Hefei, 230031, China
2.
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, 230031, China

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Received Date: March 24, 2022
Available Online: February 27, 2023

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Abstract

Abstract

The superconducting joint of the internal coil in the vacuum coil system of the device has a high requirement on weld quality because of its bad working environment. In order to verify the feasibility of welding oxygen free copper pipe with arc preheating method, the method of arc preheating with open head was adopted to preheat oxygen free copper pipe to reach the temperature required for welding copper pipe . Non-destructive testing , macroscopic and microscopic examination, and hardness measurement of weld, heat-affected zone and base metal are performed on copper welded joints. The influence of arc preheating on the heat-affected zone is evaluated. The analysis shows that there is no significant difference between the hardness of the heat affected zone and the base metal, but there is a significant difference in the microstructure. The hardness of weld metal is slightly higher.In the observation range, arc preheating has no significant effect on the heat-affected zone. The results show that arc preheating is feasible.
- internal vacuum coil system,
- arc preheating,
- oxygen free copper pipe welding,
- hardness measurement,
- microstructure

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References (8)

References

Ambrosino G, Ariola M, Tommasi G D, et al. Design of the Plasma Position and Shape Control in the ITER Tokamak using in-vessel coils[J]. IEEE Transactions on Plasma Science, 2009, 37(7): 1324 − 1331.

王克鸿, 李建勇, 嵇大圆, 等. 熔化带极自动等离子熔敷焊接纯铜技术[J]. 焊接学报, 2007, 5(5): 13 − 16. doi: 10.3321/j.issn:0253-360X.2007.05.004

Wang Kehong, Li Jianyong, Ji Dayuan, et al. Pure copper coating deposited by automatic plasma welding with melting strip electrode technology[J]. Transactions of the China Welding Institution, 2007, 5(5): 13 − 16. doi: 10.3321/j.issn:0253-360X.2007.05.004

International Organization for Standardization 17636-2-2013. Non-destructive testing of welds - Radiographic testing - Part 2: X- and gamma-ray techniques with digital detectors [S]. Geneva, Switzerland, 2013.

American Society for Testing Materials. E407-2015. Standard Practice for Microetching Metals and Alloys [S]. United States, West Conshohocken, 2015.

International Organization for Standardization 6507-1-2018. Metallic materials-Vickers hardness test-Part 1: Test method [S]. Geneva, Switzerland, 2018.

雷玉成, 郁雯霞, 李彩辉, 等. 不预热情况下的紫铜TIG焊熔池温度场的数值模拟[J]. 焊接学报, 2006, 27(5): 1 − 4. doi: 10.3321/j.issn:0253-360X.2006.05.001

Lei Yucheng, Yu Wenxia, Li Caihui, et al. Numerical simulation of molten pool temperature field for TIG welding of pure copper without preheating[J]. Transactions of the China Welding Institution, 2006, 27(5): 1 − 4. doi: 10.3321/j.issn:0253-360X.2006.05.001

International Organization for Standardization 9015-2-2016. Destructive tests on welds in metallic materials—Hardness testing-Part 2: Microhardness testing of welded joints [S]. Geneva, Switzerland, 2016.

王磊, 卫国强, 高洪永, 等. 焊接热输入对纯铜焊缝组织及力学性能的影响[J]. 焊接技术, 2014, 8(12): 10 − 14.

Wang Lei, Wei Guoqiang, Gao Hongyong, et al. Effect of welding heat input on microstructure and mechanical properties of pure copper weld[J]. Welding Technology, 2014, 8(12): 10 − 14.

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Welding feasibility analysis of arc preheating scheme for ITER anaerobic copper TIG welding