Forging method of titanium alloy ingot castings with large height-diameter ratio

A high-diameter ratio, titanium alloy technology, applied in the field of titanium alloy forging, can solve the problems of bending, folding, double drum, etc., to achieve the effect of high yield, solve double drum, and uniform composition and structure

Inactive Publication Date: 2019-01-18
湖南湘投金天钛业科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two limitations in using the above method: ① some titanium alloy ingots containing segregable elements increase the ingot diameter to increase the tonnage, it is easy to produce metallurgical defects such as segregation; ② some titanium alloys containing segregated elements When the length of the ingot is increased to increase the tonnage, forging defects such as double drums, bending, and folding will occur when the ingot is opened for forging

Method used

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  • Forging method of titanium alloy ingot castings with large height-diameter ratio
  • Forging method of titanium alloy ingot castings with large height-diameter ratio
  • Forging method of titanium alloy ingot castings with large height-diameter ratio

Examples

Experimental program
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Effect test

Embodiment 1

[0023] (1) The TC11 ingot of Φ660*2000mm was prepared by smelting three times in a vacuum consumable electric arc furnace;

[0024] (2) The TC11 ingot described in step (1) is forged into a square billet of □680mm by using the fast forging unit and the ingot billet die with a large height-to-diameter ratio; the deformation of the billet is controlled at 60%, and the deformation rate is Control at 20mm / s, preheat the mold before blank forging, the preheating temperature is ≥100℃;

[0025] (3) The billet completed in step (2) is subjected to 3 times of upsetting and drawing forging at 80°C above the β transformation temperature by using the rapid forging unit, and the deformation of each time is controlled at about 45%;

[0026] (4) The billet completed in step (3) is subjected to 4 times of upsetting and drawing forging at 50°C below the β transformation temperature by using the rapid forging unit, and the deformation of each time is controlled at about 40%, and the second fire...

Embodiment 2

[0029] (1) The TC6 ingot of Φ560*1800mm was prepared by smelting three times in a vacuum consumable electric arc furnace;

[0030] (2) The TC6 ingot described in step (1) is forged into a square billet of □580mm by using the quick forging unit and the ingot billet die with a large height-to-diameter ratio; the deformation of the billet is controlled at 65%, and the deformation rate Control at 18mm / s, preheat the mold before blank forging, the preheating temperature is ≥100℃;

[0031] (3) The billet completed in step (2) is subjected to upsetting and drawing forging for 3 times at 60°C above the β transformation temperature by using the rapid forging unit, and the deformation of each firing is controlled at about 45%;

[0032] (4) The billet completed in step (3) is subjected to 4 times of upsetting and drawing forging at 50°C below the β transformation temperature by using the rapid forging unit, and the deformation of each time is controlled at about 40%, and the second fire ...

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Abstract

The invention discloses a forging method of titanium alloy ingot castings with a large height-diameter ratio. According to the method, an advanced high-speed forging unit and a blank opening mold forthe ingot castings with the large height-diameter ratio are adopted, an appropriate deformation speed rate and an appropriate deformation amount are selected, and direct blank opening forging of the ingot castings with the height-diameter ratio higher than or equal to 3 can be completed. By means of the method, not only can metallurgical defects of titanium alloys containing Fe, Cu, Mo and other elements which are likely to be segregated be avoided during smelting of the ingot castings with a large diameter, but also the problems about bidirectional expansion, bending, folding and the like during blank opening of the ingot castings with the large height-diameter ratio can be solved. Therefore, batched production of large-tonnage titanium alloy rod materials with great performance is achieved.

Description

technical field [0001] The invention provides a method for forging a titanium alloy ingot with a large aspect ratio, which can be used for direct blank forging of an ingot with a large aspect ratio with a ratio of height to diameter ≥ 3, and belongs to the technical field of titanium alloy forging. Background technique [0002] Titanium and titanium alloys have many excellent properties such as light weight, high strength, and corrosion resistance. They are high-quality light structural materials, new functional materials and important bioengineering materials. Titanium and titanium alloys are not only widely used in energy, chemical industry, petroleum, metallurgy and other fields, but also have very important applications in aviation, aerospace, and ocean. [0003] At present, domestic large-tonnage titanium alloy rods are mainly smelted through 3 times of VAR, using a water-cooled copper crucible as a crystallizer to obtain a titanium alloy ingot with uniform composition,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00
CPCB21J5/002
Inventor 陆威华培涛余德坤
Owner 湖南湘投金天钛业科技股份有限公司
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