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Method for forging TC17 alloy blisk through [beta] forging

A technology of integral blisk and TC17, which is applied in the direction of manufacturing tools, metal processing equipment, mechanical equipment, etc., can solve problems such as difficult deformation and uniformity

Active Publication Date: 2020-04-10
SHAANXI HONGYUAN AVIATION FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the thickness fluctuation of the overall blisk structure makes it difficult to ensure uniform deformation of each part during the production of forgings.

Method used

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  • Method for forging TC17 alloy blisk through [beta] forging
  • Method for forging TC17 alloy blisk through [beta] forging
  • Method for forging TC17 alloy blisk through [beta] forging

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0055] α+β type two-phase titanium alloy, for example: titanium alloy with Chinese material designation TC17

[0056] The β-forging process steps of TC17 titanium alloy are given below:

[0057] Step 1: The temperature of the phase transition point of the TC17 titanium alloy bar used is detected to be 895°C

[0058] Step 2: If figure 1 As shown, the TC17 titanium alloy bar is cut into a billet according to the specifications required for the forging, and the billet is heated to 865 ° C, and the heat preservation time is calculated based on the effective thickness of the billet 0.6min / mm.

[0059] Step 3: Heat the upper flat die 2 and the lower flat die 4 to 855°C, put the bar heated according to step 1 into the flat die, and press down the pair at a pressing speed of 0.3mm / s to 0.6mm / s on the upper flat die The billet 1 is subjected to isothermal upsetting, so that the deformation of the bar reaches 40% to 60%, and the billet 3 is upset, and the cake billet is taken out from...

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Abstract

The invention belongs to the technical field of blisk forging, and particularly relates to a method for forging a TC17 alloy blisk through [beta] forging. The method comprises the steps that a TC17 titanium alloy bar is blanked into a bar blank according to a required size; the bar blank is subjected to upsetting into a cake blank through a flat die; the cake blank is pre-forged into a pre-forgedpiece with different height step shapes from the center to the outer circle; the pre-forging piece is machined into a rough blank with a through center; and finally the rough blank is forged into theblisk forging. By designing the reasonable pre-forged structure and conducting mechanical addition on the required rough blank, deformation of all parts of the forging in the final die forging processcan reach 50%-70%, and therefore, the original [beta] grain size is effectively refined, and final flaw detection of the forging is facilitated.

Description

technical field [0001] The invention belongs to the technical field of blisk forging, and in particular relates to a method for beta forging a TC17 alloy blisk. Background technique [0002] The integral blisk structure is to design the blade and the disc into an integral structure, thus eliminating the tenon, tenon and locking device in the traditional connection. The adoption of the blisk greatly simplifies the overall structure of the engine, reduces the weight of the structure, reduces the number of parts, and avoids the airflow loss of the tenon, further improving the thrust-to-weight ratio and reliability of the engine. According to reports, the use of integral blisks can reduce the weight of the engine by 20% to 30%, increase the efficiency by 5% to 10%, and reduce the number of parts by more than 50%. However, the thickness fluctuation of the overall blisk structure itself makes it difficult to ensure uniform deformation of each part during the production of forging...

Claims

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Application Information

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IPC IPC(8): B21K3/04B21K5/02B21J5/08B21J1/06
CPCB21J1/06B21J5/08B21K3/04B21K5/02
Inventor 张帅刘涛生舒睿昶王波伟秦卫东
Owner SHAANXI HONGYUAN AVIATION FORGING
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