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Forging method for high-microstructure-uniformity titanium alloy cake material

A technology of uniform structure and titanium alloy, applied in metal processing equipment and other directions, can solve the problems of poor structure uniformity, many forging times, and long production cycle, so as to improve chemical composition uniformity, reduce forging times, and save production costs. Effect

Active Publication Date: 2017-06-30
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

However, the traditional two-phase zone repeated upsetting and drawing process has problems such as many forging fires, long production cycle, high forging cost, and poor microstructure uniformity, and a single display signal is prone to appear in the flaw detection of the finished product, which is difficult to meet the standard requirements

Method used

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  • Forging method for high-microstructure-uniformity titanium alloy cake material
  • Forging method for high-microstructure-uniformity titanium alloy cake material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] TC6 cake material manufacturing:

[0024] Step 1, blank forging:

[0025] Use an electric furnace to heat the ingot of Φ650mm and specification TC6 to 150°C above the β phase transition temperature, and do a high-temperature homogenization treatment for ≥20 hours, that is, heat and keep it in the high-temperature zone for not less than 20 hours. After the end, use a 45MN fast forging machine for one fire twice twice Upsetting and two-drawing forging requires uniform upsetting, the upsetting rate is controlled at 15~20mm / s, and the upsetting deformation is about 45%, so as to break the original cast structure;

[0026] Step 2, intermediate forging:

[0027] Step 2.1. The TC6 forging billet completed in Step 1 is subjected to two-upsetting and two-drawing forging three times at 30-100°C above the β-phase transition temperature. In the case of obvious cracking, the hot material is returned to the furnace for 2 times of continuous forging, and the thermal insulation coeff...

example 2

[0034] Example 2 Manufacturing of TC11 cake material:

[0035] Step 1, blank forging:

[0036] Heat the ingot of Φ550mm size TC11 to 1200°C in an electric furnace, and do high-temperature homogenization treatment for more than or equal to 20 hours, that is, heat and hold in the high-temperature zone for not less than 20 hours. It is required to upsetting at a uniform speed, the upsetting rate is controlled at 15~20mm / s, and the upsetting deformation is controlled at 40~45%, so as to break the original cast structure;

[0037] Step 2, intermediate forging:

[0038] Step 2.1. The TC11 forging blank completed in step 1 is subjected to two-upsetting and two-drawing forging at 30-100°C above the β-phase transition temperature for 2-3 times. In the case of no obvious cracks on the surface, the hot material is returned to the furnace for 2~3 times of continuous forging. The thermal insulation coefficient of the hot material is 0.4~0.5; Controlled at 15~20mm / s, the final forging te...

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Abstract

The invention discloses a forging method for a high-microstructure-uniformity titanium alloy cake material. The forging method includes the steps that a titanium alloy casting ingot is subject to high temperature homogenization treatment, one heating number of upsetting pulling forging is carried out after high temperature homogenization treatment is finished, and therefore an original as-cast structure is broken; then a blank is subject to upsetting pulling forging at the temperature higher than the beta phase inversion temperature and lower than the beta phase inversion temperature, and water cooling is carried out after forging is carried out; and finally, the blank is subject to 2-3 heating numbers of upsetting pulling forging at the temperature lower than the beta phase inversion temperature by 30 DEG C to 50 DEG C to mold the cake material with the diameter ranging from 400 mm to 700 mm and the thickness ranging from 100 mm to 200 mm. According to the forging method, the manners of high temperature homogenization treatment, water cooling after forging, reversing upsetting pulling, diagonal line drawing out and the like are matched, reasonable heating and heat preservation coefficients ate reasonably designed, and the uniformity of the blank is guaranteed to the maximum degree; two-phase region high-low-high forging process at the temperature below the beta phase inversion temperature by 30 DEG C to 50 DEG C-50 DEG C to 70 DEG C-30 DEG C to 50 DEG C is adopted, and the problem that single display signals are prone to occurrence during finished product flaw detection is solved.

Description

technical field [0001] The invention relates to the technical field of titanium alloy preparation, in particular to a method for forging a high-structure uniform titanium alloy cake. Background technique [0002] As the key material for making aero-engine discs, titanium alloy cakes have extremely high requirements on structure uniformity and grain size. The traditional manufacturing process of this type of cake material is repeated upsetting and drawing deformation in the two-phase area to make the structure uniform and refine the β grains and large α phases at the same time. However, the traditional two-phase area repeated upsetting and drawing process has problems such as many forging fires, long production cycle, high forging cost, and poor microstructure uniformity, and a single display signal is prone to appear in the finished product flaw detection, which is difficult to meet the standard requirements. Contents of the invention [0003] In view of the deficiencies ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/06B21J5/08B21J1/06C22F1/18
CPCB21J1/06B21J5/06B21J5/08C22F1/183
Inventor 詹孝冬樊凯陈艳黄德超朱雪峰张辉彭晖
Owner 湖南湘投金天钛业科技股份有限公司
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