Research on the Near Net Shape Hollow Forging Technology for CAP 1400 Main Pipe
International Journal of Mechanical Engineering and Applications
Volume 6, Issue 2, April 2018, Pages: 18-22
Received: Mar. 19, 2018;
Accepted: Apr. 9, 2018;
Published: May 8, 2018
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Wang Baozhong, China First Heavy Industries, Qiqihaer, China
Liu Ying, Tianjin Heavy Industries Research & Development Co, Ltd, Tianjin, China
Guo Yi, Tianjin Heavy Industries Research & Development Co, Ltd, Tianjin, China
Nie Yihong, Tianjin Heavy Industries Research & Development Co, Ltd, Tianjin, China
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It has been widely focused because of its complex integral-structure and strict technical requirement since AP1000 main pipe appeared, which is made by 316LN stainless steel. After ten years of effort and exploring, excellent forging suppliers from all over the world agree that 316LN heavy forgings including AP1000 only can be formed by relatively simple solid forging technology though the grain size cannot meet the initial design requirement of ASTM level-4. The design concept of CAP1400 main pipe is the same as AP1000, in which the straight part, curving part and two supper-long asymmetrical nozzles should be an integrated structure manufactured by 316LN steel. But due to larger dimension and higher requirement for technology, the manufacturing of CAP1400 is more difficult. In order to realize the near net shape manufacturing of CAP1400 main pipe, we invent a green manufacturing technology with highly asymmetrical nozzle for stainless steel main pipe hollow forgings, We have successfully manufactured a stainless hollow forgings using a 78t ESR ingot with nozzle height of 400mm, wall thickness of 160mm, total length of 9000mm, and ASTM level 4-6 of grain size for each part.
Hollow Forgings, Near Net Shape Manufacturing, Grain Size
To cite this article
Research on the Near Net Shape Hollow Forging Technology for CAP 1400 Main Pipe, International Journal of Mechanical Engineering and Applications.
Vol. 6, No. 2,
2018, pp. 18-22.
Copyright © 2018 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/
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Siqueira R P, Sandim H R Z, Oliveira T R. Texture evolution in Nb-containing ferritic stainless steels during secondary recrystallization. Materials Science and Engineering A 2008, Vol. 497, 216-223.
Choi J S, Yoon Y. The temperature dependence of abnormal grain growth and grain boundary faceting in 316L stainless steel. ISIJ International 2001, Vol. 41, No. 5, 478-483.
Shirdel M, Mirzadeh H, Parsa M H. Abnormal grain growth in AISI 304L stainless steel. Materials Characterization 2014, Vol. 97, 11-17.
Guyot E, Lebarrois E, Martin B. Advantages of the new AREVA equipment for the forging of nuclear reactor strainless steel main coolant lines, 19th international forgemasters Meeting 2014, 164-167.
Ceccon T. The most common failures of hot forging process of stainless steel and Ni-alloys. 19th international forgemasters Meeting 2014, 426-430.
Wang Baozhong, et al．Green manufacturing technology for super heavy nuclear power forging [M]. Beijing: China Machine Press, 2017.
Pan pinli, Zhong Yuexian, Ma Qingxian. Development of manufacture technology for main pipe of large-sized nuclear power. China Metalforming equipment and manufacturing technology 2011, No.1, 13-17.
Chen Hongyu, Song Shukang, Du Junyi. Manufacturing technology progress for AP1000 forging main pipeline. Heavy casting and forging 2013, No.2, 1 3.
Lu Huaxing. Research and development of AP1000 reactor coolant pipe in china. Shanghai metals 2010, Vol.32, No.4, 29-32.
Wang Baozhong, Guo Yi, Zhang Wenhui, Liu Chenghe. Development of mono-block forged main coolant piping for AP1000. 18th international forgemasters Meeting, 2011, 258-262.
Wang Baozhong, et al．Green manufacturing technology and practice of super large nuclear power forgings [M]. Beijing: China Machine Press, 2017.