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Isotropic rolling method for structural steel rectangular ring

A rectangular ring, isotropic technology, used in metal rolling and other directions, can solve the problems of radial mechanical properties and axial mechanical properties that are quite different, consistent, and cannot guarantee the mechanical properties of rings.

Inactive Publication Date: 2016-03-16
GUIZHOU ANDA AVIATION FORGING
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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 structural steel rectangular ring

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[0043] The main chemical element content (percentage by weight) of the alloy is: C content 0.34%-0.42%, Mn content 0.50%-0.80%, Si content 0.17%-0.37%, S content ≤ 0.015%, P content ≤0.025%, Cr content 0.08%~1.10%, Ni content ≤0.40%, Cu content ≤0.25, balance Fe.

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

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

[0046] like figure 1 As shown, the rectangular ring blank 1 is loaded into the ring rolling mill, the core roll 3 passes through the middle of the rectangular ring blank 1, the core roll 3 is driven and the rectangular ring blank 1 approaches the main roll 2, and then the tapered roll 4 is driven Near the other side of the rectangular ring blank 1, the upper and lower tapered rollers 4 clamp the rectangular ring blank 1 in ...

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Abstract

The invention discloses an isotropic rolling method for a structural steel rectangular ring. The isotropic rolling method comprises the following steps: firstly, heating a structural 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 structural 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 structural steel rectangular rings.

Description

technical field [0001] The invention relates to a rolling method for a structural steel rectangular ring, in particular to an isotropic rolling method for a structural steel rectangular ring. Background technique [0002] Ring rolling is currently one of the most effective means of 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 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 rect...

Claims

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Application Information

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IPC IPC(8): B21H1/06
CPCB21H1/06
Inventor 欧阳斌徐东陈祖祥杨亚平李玉凤
Owner GUIZHOU ANDA AVIATION FORGING
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