Tulupov O.N., Moller A.B., Levandovskiy S.A., Kinzin D.I., Olina A., Novitskiy R.V., Dzyuba A.Y., Shurygin V.I., Serpkov E.S. Experience in the production of round long products of steel grade 60S2KHA with higher requirements to a decarburized layer depth

Abstract

Steel used to produce springs and carriage springs should have the required strength under static, dynamic or cyclic loadings, good ductility, high limits of elasticity and endurance, and high relaxation resistance. The quality of springs and carriage springs depends on a surface of rods. Requirements to the surface quality and depth of a decarburized layer of hot rolled products become stricter. The most common methods for preventing a growth of the decarburized layer include controlled steel heating. The aim of the research is to provide maximum possible uniform deformation and reduction of the decarburized layer thickness. This article focuses on roll pass design optimization for intermediate stands and a finishing high-speed rod block. When rolling in a new pattern of deformation, we had no sticking of metal in the stands and finished sizes of rolled round long products with a diameter of 14 mm were within the existing tolerances for products (±0.3 mm). A new roll pass design resulted in production of rolled products with a high surface quality, and in future we will have a possibility to produce automotive coil springs, satisfying high performance requirements.

Keywords

Spring steel, decarburized layer, non-uniform deformation, roll pass design, cross-section ovality, surface quality.

Tulupov Oleg Nikolayevich – D.Sc. (Eng.), Professor, Nosov Magnitogorsk State Technical University, Magnito-gorsk, Russia. Phone: +7 (3519) 298 525. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..

Moller Alexander Borisovich – D.Sc. (Eng.), Professor, Nosov Magnitogorsk State Technical University, Magni-togorsk, Russia. Phone: +7 (3519) 298 525. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..

Levandovskiy Sergey Anatol'evich – Ph.D. (Eng.), Associate Professor, Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia. Phone: +7 (3519) 298 525. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..

Kinzin Dmitriy Ivanovich – Ph.D. (Eng.), Associate Professor, Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia. Phone: +7 (3519) 298 525. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..

Olina Anna – Engineer, Laboratory for Development of Semi-products, Mubea IT Spring Wire, Prostejov, Czech Republic.

Novitskiy Ruslan Vitalievich – Head of the Long Products Shop, Open Joint Stock Company Magnitogorsk Iron and Steel Works, Magnitogorsk, Russia.

Dzyuba Anton Yurievich – Head of the Long Products Laboratory, Research and Development Center, Open Joint Stock Company Magnitogorsk Iron and Steel Works, Magnitogorsk, Russia.

Shurygin Vladimir Ivanovich – Chief Roll Pass Designer, Research and Development Center, Open Joint Stock Company Magnitogorsk Iron and Steel Works, Magnitogorsk, Russia.

Serpkov Egor Sergeevich – Lead Engineer of the Group for the Rolling Division, Research and Development Center, Open Joint Stock Company Magnitogorsk Iron and Steel Works, Magnitogorsk, Russia.

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