Cast ingot cogging forging technology for improving structure uniformity of forging stocks of titanium alloy

A technology of uniform structure and billet forging, which is applied in the field of forging to reduce the deformation resistance and improve the plasticity of the ingot.

Active Publication Date: 2014-02-19
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to propose a forging process to solve the problem of forging large-scale titanium alloy forging blanks using 4,500-ton to 10,000-ton fast forging machines for large-scale and extra-large titanium alloy ingots (ingot specifications φ760mm~φ1020mm) to obtain titanium alloys with uniform structure

Method used

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  • Cast ingot cogging forging technology for improving structure uniformity of forging stocks of titanium alloy
  • Cast ingot cogging forging technology for improving structure uniformity of forging stocks of titanium alloy
  • Cast ingot cogging forging technology for improving structure uniformity of forging stocks of titanium alloy

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Embodiment 1

[0029] TC4-DT titanium alloy is a beam forging forged by the above-mentioned forging process for improving the uniformity of the titanium alloy forging billet. The blanking ingot specification is φ920mm. After the quasi-β heat treatment, the physical and chemical anatomical analysis results show that the high and low magnification structures in different regions of the forging are uniform better sex (see figure 2 ). The uniformity of mechanical properties is good and meets the requirements of use (see Table 2).

[0030] Table 2 Mechanical properties of TC4-DT titanium alloy beam forgings at room temperature

[0031]

[0032]

Embodiment 2

[0034] TC4-DT titanium alloy is a forging forged by the above-mentioned forging process for improving the uniformity of the titanium alloy forging billet. The specification of the blanking ingot is φ1020mm. After the quasi-β heat treatment, the physical and chemical anatomical analysis results show that the high and low magnification structure uniformity in different regions of the forging is better (see image 3 ). The uniformity of mechanical properties is good and meets the requirements of use (see Table 3).

[0035] Table 3 Mechanical properties of TC4-DT titanium alloy frame forgings at room temperature

[0036]

[0037]

Embodiment 3

[0039]TC21 titanium alloy is a forging billet forged by the above-mentioned forging process for improving the uniformity of the structure of the titanium alloy forging billet, and the blanking ingot specification is φ820mm. The mechanical properties of the forged billets were tested after double heat treatment. The results show that the uniformity of mechanical properties is good and meets the requirements for use (see Table 4).

[0040] Table 4 Mechanical properties of TC21 titanium alloy forging blank at room temperature

[0041]

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Abstract

The invention discloses a cast ingot cogging forging technology for improving the structure uniformity of large-thickness forging stocks of titanium alloy. Cogging forging is carried out on the titanium alloy two heating times under the condition of the heating temperature of 1150 DEG C and 1100 DEG C; the titanium alloy is forged at a heating time under the condition of the heating temperature being 20-45 DEG C below the temperature of a beta phase transformation point; the titanium alloy is forged at a heating time under the condition of the heating temperature being 30-80 DEG C above the temperature of the beta phase transformation point; the titanium alloy is forged 2-5 heating times under the condition of the heating temperature being 20-45 DEG C below the temperature of the beta phase transformation point, and then the large-size titanium alloy forging stocks with the even structure are obtained. The cast ingot cogging forging technology is suitable for large cast ingot cogging and forging stock forging of titanium alloy of an alpha type or an alpha-beta type or an approximate-beta type, and requirements for manufacturing of large-size titanium alloy casting pieces or parts which are needed for manufacturing planes and have high requirements for structure temperature uniformity can be met.

Description

technical field [0001] The invention belongs to the forging technology, and relates to an ingot forging process for improving the uniformity of the structure of a titanium alloy forging billet. Background technique [0002] In order to achieve the design goals of high weight reduction, long life and high environmental adaptability for large aircraft at home and abroad, it is required that the aircraft adopt advanced durability / damage tolerance design methods to further reduce the weight of the aircraft and increase the design life of the aircraft. At present, a large number of large aircraft at home and abroad use damage-tolerant titanium alloys and their large integral components to meet the design needs of high weight reduction and long life. The U.S. F-22 aircraft uses Ti-6Al-4V ELI (domestic similar brand TC4-DT) damage tolerance titanium alloy to manufacture large-scale overall main load-bearing components, and the projected area of ​​the large-scale overall load-bearin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J3/00C22F1/18
Inventor 朱知寿王新南李军费跃商国强祝力伟
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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