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Isotropic rolling method for bearing steel rectangular ring

A rectangular ring, isotropic technology, applied in the direction of metal rolling, etc., can solve the problems such as the large difference between the radial mechanical properties and the axial mechanical properties, and the inability to guarantee the mechanical properties of the ring and achieve consistency.

Inactive Publication Date: 2016-03-16
GUIZHOU ANDA AVIATION FORGING
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  • Abstract
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  • Claims
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Problems solved by technology

The production of rectangular rings is mostly carried out by radial rolling. The rings and blanks are designed at the same height. The tapered rollers only play the role of preventing the rings from climbing and limiting the height increase of the rings. The axial deformation is small. As a result, the radial mechanical properties of the ring are quite different from the axial mechanical properties
With the development and progress of ring rolling technology, people have gradually mastered the radial / axial bidirectional rolling forming method. The axial mechanical properties of rectangular rings produced by this method have been greatly improved. However, it is still not possible. Ensure that the mechanical properties of the ring are consistent in all directions

Method used

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  • Isotropic rolling method for bearing steel rectangular ring

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[0043] The main chemical element content (weight percentage) of the alloy is: 0.17%~0.23% C content, 0.30%~0.60% Mn content, 0.15%~0.40% Si content, S content ≤0.030%, P content ≤0.030%, 1.25%~1.75% of Cr, 3.25%~3.75% of Ni, ≤0.25 of Cu, and Fe as the balance.

[0044] The steps of this method are as follows:

[0045] The bearing steel bar material blanked according to the specification is heated to the forging temperature, and after upsetting, punching and pre-rolling, the height is H 1 , Thickness is B 1 , The outer diameter is R 1 Rectangular ring blank;

[0046] Such as figure 1 As shown, the rectangular ring blank 1 is loaded into the ring rolling machine, the core roller 3 passes through the middle of the rectangular ring blank 1, and the core roller 3 is driven to drive the rectangular ring blank 1 to approach the main roller 2, and then the cone roller 4 is driven. Close to the other side of the rectangular ring blank 1, the upper and lower tapered rollers 4 sandwich the re...

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Abstract

The invention discloses an isotropic rolling method for a bearing steel rectangular ring. The isotropic rolling method comprises the following steps: firstly, heating a bearing steel bar till a forging temperature, and carrying out upsetting, piercing and pre-rolling to form a rectangular ring blank; secondly, loading the rectangular ring blank on a ring rolling mill, lifting a conical roller by h=5mm-10mm to tilt the rectangular ring blank, and then carrying out rolling forming to obtain the bearing steel rectangular ring. Such a method is capable of keeping the mechanical properties of the rectangular ring consistent in all directions by changing a flowing direction of the material during rolling, thereby improving the comprehensive mechanical properties of the rectangular ring. The method is used for producing the isotropic bearing steel rectangular rings.

Description

Technical field [0001] The invention relates to a rolling method of a bearing steel rectangular ring, in particular to an isotropic rolling method of a bearing steel rectangular ring. Background technique [0002] Ring rolling is currently one of the most effective methods for producing high-performance seamless rings, and has been widely used in many fields such as aviation and aerospace. The production of rectangular rings is mostly carried out by radial rolling. The rings and blanks are designed with equal height. The tapered roller only serves to prevent the ring from climbing and limit the height of the ring. The axial deformation is small. As a result, the radial mechanical properties of the ring are quite different from the axial mechanical properties. With the development and progress of ring rolling technology, people have gradually mastered the diameter / axis bidirectional rolling forming method. The axial mechanical properties of the rectangular ring produced by this m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21H1/06B21H1/22
CPCB21H1/06B21H1/22
Inventor 夏春林陈明范茂艳喻淼真叶康源
Owner GUIZHOU ANDA AVIATION FORGING
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