Forging method of super-large-specification Ti80 titanium alloy forging stock

A super-sized, titanium alloy technology, which is applied in the direction of manufacturing tools, metal processing equipment, forging/pressing/hammer devices, etc., can solve the problem of uneven deformation at the end and middle, so as to avoid uneven deformation, broad application prospects, Guarantee the effect of plastic deformation

Active Publication Date: 2020-11-10
西部超导材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies of the prior art, the present invention proposes a forging method for a super-large Ti80 titanium alloy forging billet, which can effectively solve the problems raised in the background technology, and avoid the ingot with an excessively large aspect ratio when upsetting The uneven deformation of the end and middle parts caused by it ensures that the as-cast structure in the ingot is fully broken and a uniform structure is obtained, which has broad application prospects.

Method used

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  • Forging method of super-large-specification Ti80 titanium alloy forging stock
  • Forging method of super-large-specification Ti80 titanium alloy forging stock
  • Forging method of super-large-specification Ti80 titanium alloy forging stock

Examples

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Effect test

Embodiment 1

[0034] Example 1, forging an ingot with a diameter of 1020mm and a weight of 11T:

[0035] S1. Billet forging: the heating temperature of ingot forging is 1150°C, and it is heated for 20 hours before being out of the furnace. The ingot is subjected to an upsetting deformation with an anvil tool with a diameter of 1800mm. The ratio is 1.2, and it is cooled by air cooling after forging. Among them, using an anvil with a diameter of 1800mm to carry out an upsetting deformation can ensure the overall plastic deformation of the ingot, avoiding the phenomenon that the ingot has an excessively large height-to-diameter ratio, and the phenomenon of uneven deformation at the end and middle during upsetting, which is reversed. Edge treatment avoids deformation dead zone at edges and corners;

[0036] S2. Intermediate forging: the ingot after the blank forging in step S1 is re-forged in the single-phase zone for 7 fires, and the heating temperature for each fire is selected to be 20°C to...

Embodiment 2

[0043] Embodiment 2, forging an ingot with a diameter of 1020mm and a weight of 11T:

[0044] S1. Billet opening and forging: the heating temperature of the ingot forging is selected at 1200°C, and it is heated for 22 hours before it is released from the furnace. The ingot is subjected to an upsetting deformation with an anvil tool with a diameter of 1800 mm. The ratio is 1.7, and it is cooled by air cooling after forging.

[0045] S2. Intermediate forging: the ingot after forging in step S1 is re-forged in the single-phase zone for 8 fire times, and the heating temperature for each fire is selected to be 20°C to 120°C above the phase transition point, and the heating temperature for each fire is Gradually decrease. Before each fire forging, the billet is wrapped with thick asbestos with a thickness of 25mm. After the material is out of the furnace, it is sequentially subjected to upsetting, elongation, and chamfering treatment. The forging ratio of each fire is 1.9. Air cooli...

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Abstract

A forging method of a super-large-specification Ti80 titanium alloy forging stock comprises the steps that S1, cogging forging is conducted, specifically, a Ti80 cast ingot is subjected to one-heating-number cogging forging, the cogging forging mode is upsetting, and a forged stock is subjected to air cooling; S2, intermediate forging is conducted, specifically, the stock obtained after cogging forging is subjected to multi-heating-number modified forging; and S3, finished product forging is conducted, specifically, drawing-out forming is conducted on the stock obtained after intermediate forging when the temperature is lower than the phase transformation point, air cooling is conducted on the forged stock, and finally the Ti80 titanium alloy forging stock meeting the specification is obtained. According to the forging method of the super-large-specification Ti80 titanium alloy forging stock, the phenomena of end and middle deformation unevenness caused during upsetting of an ingot with the too large height-diameter ratio is avoided, it is guaranteed that as-cast structures in the ingot are fully crushed, homogenized structures are obtained, and the wide application prospect is achieved.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal processing methods, in particular to a forging method of a super-large Ti80 titanium alloy forging billet. Background technique [0002] Ti80 titanium alloy is a new type of Ti-Al-Nb-Zr-Mo series α+β titanium alloy independently developed in my country. It has comprehensive properties such as high strength, high toughness, weldability, corrosion resistance, good low cycle fatigue and high impact toughness. Compared with the traditional titanium alloy TC4, the plasticity has increased by 3% to 5%, and the impact toughness has increased by nearly 2 times, is widely used in aviation, spaceflight, navigation and other fields, especially in the field of marine engineering has a good application prospect. At present, the marine engineering field has gradually begun to use large-scale forging billets to prepare pressure vessels, pressure-resistant shells and other components. The larger the si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J1/02B21J5/08B21J5/06B21K29/00
CPCB21J1/02B21J5/08B21J5/06B21K29/00
Inventor 杨晶雷锦文任晓龙杜玉俊陈海生张胜罗锦华王凯旋李少强杜予晅刘向宏
Owner 西部超导材料科技股份有限公司
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