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Forging processing method for TC32 titanium alloy large specific bar

A TC32 and processing method technology, applied in the field of titanium alloys, can solve the problems of small structures, inability to obtain comprehensive mechanical properties of products, and high cost

Active Publication Date: 2021-04-20
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

Domestic titanium alloy raw materials generally have the disadvantages of long processing cycle, many fire times, and high cost.
For raw materials, too many forging fires will lead to too fine structure, and the fine structure will reduce the process window of small forgings, resulting in the failure of the final product to obtain the best comprehensive mechanical properties
However, less forging fires will easily lead to uneven structure, and the free end of the bar is too long, resulting in a large loss of raw materials

Method used

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  • Forging processing method for TC32 titanium alloy large specific bar
  • Forging processing method for TC32 titanium alloy large specific bar
  • Forging processing method for TC32 titanium alloy large specific bar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1 (Forging method of Φ210mm bar material)

[0036] The TC32 titanium alloy Φ780mm ingot is selected, and the β transformation temperature of the ingot is 905°C. The specific forging process is as follows:

[0037] (1) Blank forging

[0038] It is completed in 2 fires. The 1st fire heats the TC32 ingot to 1150°C and keeps it warm. After it is taken out of the furnace, it is subjected to two upsetting and two drawing to a square. The forging ratio is controlled at 9-10, and the height-to-diameter ratio of the billet is controlled at about 2.0. Air cooling is used after forging; The second fire is heated and kept at 1080°C, two upsetting and two drawing are forged to all directions, the forging ratio is controlled at 9-10, and the height-diameter ratio of the billet is finally controlled to be 1.5, and air cooling is used after forging;

[0039] (2) Homogenized forging

[0040] First, heat the billet in step (1) to 870°C and keep it warm. After it comes out of t...

Embodiment 2

[0046] Embodiment 2 (Forging method of Φ380mm bar material)

[0047] The TC32 titanium alloy Φ780mm ingot is selected, and the β transformation temperature of the ingot is 905°C. The specific forging process is as follows:

[0048] (1) Blank forging

[0049] Heat the TC32 ingot to 1150°C and keep it warm, take it out of the furnace and carry out two upsetting and two drawing to Bafang. The diameter ratio is 1.5, and air cooling is adopted after forging;

[0050] (2) Homogenized forging

[0051] First, heat the billet in step (1) to 875°C and keep it warm. After it comes out of the furnace, it is forged to eight directions with one upsetting and one drawing. The forging ratio is controlled at 1.6. The height-to-diameter ratio of the billet after forging is controlled at 1.5. , the time of returning to the furnace and transferring the material is not more than 120s, and the holding time is controlled at 330-360min. After being out of the furnace, forging is carried out with ...

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Abstract

The invention relates to the technical field of titanium alloy forging, in particular to a forging processing method for a TC32 titanium alloy large specific bar. The method comprises the steps: performing recrystallized homogenized forging after cogging forging; then performing forging at a beta transition temperature; and finally, forging a product. Tissues are regulated and controlled precisely to obtain needed mechanical properties. The consistence of flaw detection level of the bar is improved. The obtained tissues and performance are uniform, and the yield is improved.

Description

technical field [0001] The invention relates to the technical field of titanium alloys, in particular to a method for forging and processing TC32 titanium alloy large-scale rods. Background technique [0002] Due to its low density, high specific strength, good corrosion resistance, low elastic modulus, small thermal conductivity and high yield ratio, titanium alloy has been used in aviation, aerospace, shipbuilding, chemical industry, petroleum and other fields. In the field, titanium alloy is one of the main structural materials of contemporary advanced aircraft. When widely used, it is one of the notable signs of the advanced nature of the new generation of aircraft, which can greatly improve the structural weight reduction effect and safety reliability. [0003] With the development of aircraft design concepts from simple static strength to safety-life, damage-safety and the current damage tolerance design principles, titanium alloy materials are gradually shifting from...

Claims

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Application Information

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IPC IPC(8): B21J5/00B21J5/06B21J5/08B21J1/06
Inventor 朱鸿昌李超樊凯朱雪峰陈艳詹孝冬
Owner 湖南湘投金天钛业科技股份有限公司
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