Forging method for improving horizontal mechanical property of flat and square forging piece

A technology of transverse mechanical properties and forgings, which is applied in the field of free forging, can solve the problems of insufficient consideration of transverse properties, low transverse properties, unqualified transverse properties of forgings, etc., and achieve the effect of improving transverse mechanical properties and reducing anisotropic difference

Active Publication Date: 2012-07-11
CITIC HEAVY INDUSTRIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the shape of the forging (attached figure 1 ), the traditional process of upsetting and drawing is adopted, the direction of the metal flow line is consistent with the longitudinal direction of the forging, the forging fiber structure is single, the longitudinal performance is much greater than the transverse tangential performance, the anisotropy of the forging performance is obvious, and the transverse performance is the lowest. It does not meet the technical requirements, an

Method used

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  • Forging method for improving horizontal mechanical property of flat and square forging piece
  • Forging method for improving horizontal mechanical property of flat and square forging piece

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example one

[0023] First, the steel ingot WHF method is used to upset the length of the ingot to ensure that the core of the steel ingot is fully forged; after the flat square is 1400×700×440, the longitudinal length is 1400mm, the lateral length is 700mm, and the tangential length is 440mm, so that the forging is horizontal. It is consistent with the axis of the steel ingot, that is, the popular direction of the metal is consistent with the lateral direction of the forging, which improves the lateral performance of the forging; secondly, it is upset along the length of 1400mm to H=910mm, and the deformation is controlled at about 35%; flattened in the direction of 910mm to the finished product The size can improve the obvious fiber directionality due to the main deformation, and improve the transverse tangential performance while improving the performance directionality; 4) Forgings are heat treated; 5) Forgings are tested in transverse tangential direction. After the t...

Example Embodiment

[0024] Embodiment two

[0025] First, the steel ingot WHF method is used to upset the length of the ingot to ensure that the core of the steel ingot is fully forged; after the flat square is 1400×700×440, the longitudinal length is 1400mm, the lateral length is 700mm, and the tangential length is 440mm, so that the forging is horizontal. It is consistent with the axis of the steel ingot, that is, the popular direction of the metal is consistent with the lateral direction of the forging, which improves the lateral performance of the forging; secondly, it is upset along the length of 1400mm to H=980mm, and the deformation is controlled at about 30%; flattened in the 980mm direction to the finished product The size can improve the obvious fiber directionality due to the main deformation, and improve the transverse tangential performance while improving the performance directionality; 4) Forgings are heat treated; 5) Forgings are tested in transverse tangential direction. After the t...

Example Embodiment

[0026] Embodiment three

[0027] First, the steel ingot WHF method is used to upset the length of the ingot to ensure that the core of the steel ingot is fully forged; after the flat square is 1400×700×440, the longitudinal length is 1400mm, the lateral length is 700mm, and the tangential length is 440mm, so that the forging is horizontal. It is consistent with the axis of the steel ingot, that is, the popular direction of the metal is consistent with the lateral direction of the forging, which improves the lateral performance of the forging; secondly, it is upset along the length of 1400mm to H=840mm, and the deformation is controlled at about 40%; flattened in the 840mm direction to the finished product The size can improve the obvious fiber directionality due to the main deformation, and improve the transverse tangential performance while improving the performance directionality; 4) Forgings are heat treated; 5) Forgings are tested in transverse tangential direction. After the...

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Abstract

The invention discloses a forging method for improving the horizontal mechanical property of a flat and square forging piece. The secondary upsetting and drawing in different directions can be increased by changing the forging direction to control metal streamline direction in the process, so that the purposes of improving the comprehensive mechanical property while improving the horizontal mechanical property of the forging piece can be fulfilled. The forging method is realized by the following scheme that: a steel ingot is upsetted thick and drawn long, the forging piece is horizontally drawn to be flat and square and is then upsetted thick and drawn long secondarily along the vertical direction, heat treatment is conducted, and finally, mechanical property test is carried out. According to the forging method, the horizontal mechanical property of the forging piece is effectively improved, and the reliability of the forging piece is improved.

Description

technical field [0001] The invention belongs to the technical field of free forging, in particular to a forging method for improving the transverse mechanical properties of flat square forgings. Background technique [0002] At present, flat and square forgings are often used in some fields, and require such forgings to have high transverse strength and longitudinal strength. For example, a 30CrMnSiNi2A flat and square forging for an aerospace industry has complex shapes and special requirements for use. The transverse and tangential mechanical properties of forgings have high requirements and there is no obvious difference. Among them, the transverse tensile strength is greater than 1530MPa, and the tangential tensile strength is greater than 1540MPa. According to the shape of the forging (attached figure 1 ), the traditional process of upsetting and drawing is adopted, the direction of the metal flow line is consistent with the longitudinal direction of the forging, the f...

Claims

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Application Information

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IPC IPC(8): B21J5/00C21D8/06C21D1/19C21D1/26C21D1/28
Inventor 姬立功宋新双马斌陈明董文斐韩利杰
Owner CITIC HEAVY INDUSTRIES CO LTD
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