Titanium alloy forge piece preparation method

A titanium alloy and forging technology, applied in the field of titanium alloy forging preparation, can solve the problems of high cost of balance elbow, low fatigue performance, poor reliability, etc., and achieve the effects of low manufacturing cost, high production efficiency and high reliability

Active Publication Date: 2020-12-22
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the deficiencies in the prior art, the present invention provides a short-process and low-cost preparation method for titanium alloy balance elbow forgings with large deformation, which fundamentally solves the problems of high cost, long cycle time and low fatigue performance of the prior art for manufacturing balance elbows. , poor reliability and other issues

Method used

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  • Titanium alloy forge piece preparation method

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Experimental program
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Effect test

Embodiment 1

[0029] The Φ580×1600mm ingot with the material grade TC4 is obtained after mixing titanium sponge with an intermediate alloy, pressing electrode welding, and three times of vacuum consumable melting. T3620.1-2016), the measured phase transition point is 998°C.

[0030] Step 1, removing the surface defects of the ingot, cutting off the titanium alloy ingot riser and ingot bottom at the same time, and chamfering the end face;

[0031] Step 2. Preheat the ingot at 850°C for 180 minutes, then raise the temperature to 1150°C for 350 minutes, perform 2 upsetting and 2 drawing deformations on the fast forging machine, and forge to □500×1620mm; then place the billet at 850 Preheat and hold for 150 minutes at ℃, then raise the temperature to 1050°C and hold for 240 minutes, perform 2 upsetting and 2 drawing deformations on the fast forging machine, forge and draw to 350×750×1540mm, and obtain primary billets;

[0032] Step 3: Heat the primary billet at 968°C for 500 minutes, and then ...

Embodiment 2

[0040] The Φ500×1200mm ingot with the material grade TC4 is obtained after assembly of TC4 returned materials from multiple furnace billets, welding after adding an appropriate amount of alloy Al, and three times of vacuum self-consumption melting. Composition" (GB / T 3620.1-2016), the measured phase transition point is 993°C.

[0041] Step 1, removing the surface defects of the ingot, cutting off the titanium alloy ingot riser and ingot bottom at the same time, and chamfering the end face;

[0042] Step 2. Preheat the ingot at 850°C for 150 minutes, then raise the temperature to 1150°C for 350 minutes, perform 2 upsetting and 2 drawing deformations on the fast forging machine, and forge to □450×1050mm; then place the billet at 850 Preheat and hold for 120 minutes at ℃, then raise the temperature to 1050°C and hold for 200 minutes, perform 2 upsetting and 2 drawing deformations on the fast forging machine, forge and draw to 300×650×1090mm, and obtain the primary billet;

[004...

Embodiment 3

[0051] The Φ500×1300mm ingot with the material grade of TC32 is obtained after mixing titanium sponge with an intermediate alloy, pressing electrodes, welding and three times of vacuum consumable melting. / T3620.1-2016), the measured phase transition point is 915°C.

[0052] Step 1, removing the surface defects of the ingot, cutting off the titanium alloy ingot riser and ingot bottom at the same time, and chamfering the end face;

[0053] Step 2. Preheat the ingot at 850°C for 150 minutes, then raise the temperature to 1150°C for 350 minutes, perform 2 upsetting and 2 drawing deformations on the fast forging machine, and forge to □450×1160mm; then place the billet at 850 Preheat and hold for 120 minutes at ℃, then raise the temperature to 1050°C and hold for 200 minutes, perform 2 upsetting and 2 drawing deformations on the fast forging machine, forge and draw to 280×700×1200mm, and obtain the primary billet;

[0054] Step 3: Heat and hold the primary billet at 895°C for 500 ...

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Abstract

The invention belongs to the field of material science and technology processing and manufacturing, and relates to a titanium alloy forge piece preparation method. According to the method, firstly, aqualified cast ingot is subjected to one-to-two-heat two-upsetting two-drawing deformation at 1000 DEG C to 1150 DEG C to obtain a primary square billet; then the primary square billet is subjected totwo-heat short-process rolling at 30 DEG C to 60 DEG C below a phase transformation point to obtain a finished plate with a thickness of 110 mm; then by using a water jet cutter or through wire cut electrical discharge machining, blanking is carried out to directly obtain a balance elbow intermediate billet, then the balance elbow intermediate billet is bent and die-forged at 35 DEG C to 40 DEG Cbelow the phase transformation point to obtain a balance elbow die forging; and finally, heat treatment is carried out on the balance elbow die forging to obtain a balance elbow forge piece finishedproduct. According to the preparation method, a whole-process low-cost control thought is adopted, and large-deformation short-process rolling processes of two-phase regions at different temperaturesare introduced, so that purposes of quickly refining and homogenizing a structure are achieved, the manufacturing cost of a forge piece is reduced, and the fatigue performance of the forge piece is improved.

Description

technical field [0001] The invention belongs to the field of material science and technology processing and manufacturing, and relates to a method for preparing a titanium alloy forging. Background technique [0002] The balance elbow is a kind of "Z" shaped curved arm stepped shaft, one end is connected to the balance elbow shaft, and the other end is connected to the load wheel shaft. It is the key component connecting the mobile device and the suspension device in various tracked vehicles. , it will seriously affect the normal driving of the vehicle. During the driving process of the vehicle, due to the complex and changeable ground environment, the balance elbow is mainly subjected to various loads such as bending torsional stress, bending fatigue stress, and impact. Therefore, the balance elbow material requires high strength, stiffness and fatigue resistance. A large number of test results and public literature reports show that fatigue fracture induced by various fac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21K1/12B21J5/00C22F1/18C21D9/00
CPCB21K1/12B21J5/002C22F1/183C21D9/0068
Inventor 李明兵朱知寿商国强王新南祝力伟李静
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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