Comparative Studies on a Chamfer Technology and a Convex Roll Technology During the Soft Reduction Process

• Autorzy: Zong Nanfu , Jing Tao , Liu Yang

Identyfikatory

DOI

10.24425/amm.2021.136386

• Języki publikacji: EN

Abstrakty

EN

To comprehensively investigate the diversity of a chamfer technology and a convex roll technology under the same soft reduction process (i.e., section size, reduction amount, casting speed and solid fraction), a three-dimensional mechanical model was developed to investigate the effect of the chamfer profile and roll surface profile on the deformation behavior, cracking risk, stress concentration and reduction force of as-cast bloom during the soft reduction process. It was found that a chamfer bloom and a convex roll can both avoid the thicker corner of the as-cast bloom solidified shell, and significantly reduce reduction force of the withdrawal and straightening units. The convex profile of roll limits lateral spread along bloom width direction, therefore it forms a greater deformation to the mushy zone of as-cast bloom along the casting direction, the tensile strain in the brittleness temperature range (BTR) can obviously increase to form internal cracks. The chamfer bloom is much more effective in compensating the solidification shrinkage of mushy zone. In addition, chamfer bloom has a significant decrease of tensile strain in the brittleness temperature range (BTR) areas, which is expected to greatly reduce the risk of internal cracks.

Słowa kluczowe

EN

convex roll technology; chamfer technology; deformation behavior; cracking risk

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2021
• Tom: Vol. 66, iss. 3
• Strony: 819--829
• Opis fizyczny: Bibliogr. 14 poz., rys., tab., wykr.

Twórcy

autor

Zong Nanfu

• Tsinghua University, School of Materials Science and Engineering, Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing 100084, China

• https://orcid.org/0000-0002-2352-1592

autor

Jing Tao

• Tsinghua University, School of Materials Science and Engineering, Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing 100084, China

• https://orcid.org//0000-0002-9634-7521

autor

Liu Yang

• Jiangsu Changqiang Iron and Steel Corp., Ltd., Jiangsu 214500, China

• https://orcid.org/0000-0003-4425-4136

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Uwagi

1. The present work is financially supported by The National Key Research and Development Program of China No. 2017YFB1103700. The authors are grateful to Senior Engineer Zhifang Lu in Xingtai Iron and Steel Corp., Ltd. For their help to conduct the plant trial.

2. Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).