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Die forging forming method of TC4 titanium alloy round-T-shaped forge piece

A technology for titanium alloys and forgings, applied in the field of die forging of TC4 titanium alloy round-T-shaped forgings, can solve the problems of coarse local structure, unqualified ultrasonic flaw detection, etc., to optimize the bottom shape, facilitate metal forming, and ensure flow line effect

Inactive Publication Date: 2019-02-19
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the local deformation of the forging falls into the critical deformation area, due to the poor deformation and distortion energy, it will cause the local structure to be coarse, resulting in the unqualified ultrasonic flaw detection

Method used

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  • Die forging forming method of TC4 titanium alloy round-T-shaped forge piece
  • Die forging forming method of TC4 titanium alloy round-T-shaped forge piece
  • Die forging forming method of TC4 titanium alloy round-T-shaped forge piece

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The first step is forging drawing design;

[0040] The second step, blank inspection

[0041] The blank is inspected, and it is required that the primary α phase content of the blank is 60% in addition to meeting the relevant standards. The α+β / β phase transition point is 995°C.

[0042] The third step, billet calculation: Calculate the size and weight of the billet according to the shape, size and weight of the die forging, the forging deformation ratio, and calculate the diameter and length of the required billet according to the forging deformation ratio. The calculation method is as follows:

[0043] 3.1. Calculation of blank weight:

[0044] G of the weight of the blank 1 , the weight of die forging G 2 , Weight of die forging burrs g 2 .

[0045] G 1 =(G 2 +g 2 )×1.01

[0046] G 1 =(8.14+0.9)×1.01=9.13Kg

[0047] 3.2. The size of the blank:

[0048] Forging large end diameter D 2 , billet diameter D 1 ,

[0049] D. 1 =0.9×D 2

[0050] D. 1 =0....

Embodiment 2

[0067] The first step is forging drawing design;

[0068] The second step, blank inspection

[0069] The billet is inspected, and the billet is required to meet the relevant standards, the content of the primary α phase is 85%, and the α+β / β phase transition point is 992°C.

[0070] The third step, billet calculation: Calculate the size and weight of the billet according to the shape, size and weight of the die forging, the forging deformation ratio, and calculate the diameter and length of the required billet according to the forging deformation ratio. The calculation method is as follows:

[0071] 3.1. Calculation of blank weight:

[0072] G of the weight of the blank 1 , the weight of die forging G 2 , Weight of die forging burrs g 2 .

[0073] G 1 =(G 2 +g 2 )×1.01

[0074] G 1 =(19.99+1.9)×1.01=22.10Kg

[0075] 3.2. The size of the blank:

[0076] Forging large end diameter D 2 , billet diameter D 1 ,

[0077] D. 1 =0.9×D 2

[0078] D. 1 =0.9×197=177.3...

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Abstract

The invention discloses a die forging forming method of a TC4 titanium alloy round-T-shaped forge piece. The primary alpha phase of an adopted blank is 55 to 90%, heating before blank forging is carried out, and the process of one-time temperature rise and two-time heat preservation is carried out in an electric furnace. According to the method, raw materials are strictly controlled, according tothe proportion range of the blank primary alpha phase, the forging temperature is determined, the bottom shape of the force piece is optimized, metal forming is facilitated, precise control over the forge piece structure is achieved, fire forming is adopted, the streamline, the structure and the performance of the forge piece are ensured, and the forge piece structure and performance consistency are improved.

Description

technical field [0001] The invention belongs to the field of forging forming of titanium alloy forgings, and in particular relates to a method for die forging forming of TC4 titanium alloy round-T-shaped forgings. Background technique [0002] TC4 is a medium-strength α+β two-phase titanium alloy containing 6% of α-stable element Al and 4% of β-stable element V. The forging process and thermal processing parameters have a significant impact on the structure and properties of TC4 alloy forgings. Improper selection of forging process methods and parameters may easily lead to low-magnification clear grains, uneven structures, unqualified final performance, and unqualified flaw detection, etc. question. Secondly, TC4 alloy has high deformation resistance and difficult flow, and forgings have strict grain flow lines and ultrasonic flaw detection requirements. When the local deformation of the forging falls into the critical deformation zone, due to the poor deformation and dist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B21J5/02B21K29/00
CPCB21J5/02B21K29/00B23P15/00
Inventor 覃佳栋王莹何俊惠瑞拓杨辉吴娟利苗莉萍赵刚
Owner AECC AVIATION POWER CO LTD
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