A short-process preparation method of tc4 titanium alloy fine equiaxed structure and large-scale rods

An equiaxed structure and titanium alloy technology, which is applied in the field of short-process preparation of large-sized bars with shaft structure, can solve the problems of low yield, long production cycle and large grinding loss.

Active Publication Date: 2021-09-10
WESTERN TITANIUM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the above-mentioned conventional process, the total processing times are generally not less than 10 times, the production cycle is long, the grinding loss is large, and the end of the bar needs to be cut to remove the uneven area of ​​​​the deformed structure. Even if double-scale production is used, each One bar also needs to cut off 1.5 heads, the yield is low, and the production cost remains high

Method used

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  • A short-process preparation method of tc4 titanium alloy fine equiaxed structure and large-scale rods
  • A short-process preparation method of tc4 titanium alloy fine equiaxed structure and large-scale rods
  • A short-process preparation method of tc4 titanium alloy fine equiaxed structure and large-scale rods

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Experimental program
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Embodiment 1

[0030] This embodiment includes the following steps:

[0031] Step 1. Peel the cylindrical 8TC4 titanium alloy ingot with a specification of Ф720mm×550mm (section diameter×length) to a specification of Ф690mm×550mm (section diameter×length), and then carry out 2 rounds of billet forging. Among them, the first The initial forging temperature of the first fire blank forging is 1150°C, the final forging temperature is 930°C, the total forging ratio is 8.4, air cooling after forging, the initial forging temperature of the second fire blank forging is 1070°C, and the final forging temperature is 930 ℃, the total forging ratio is 10.8, air-cooled after forging, and the surface of the TC4 titanium alloy ingot is subjected to surface grinding treatment after each fire forging, and the primary forging billet is obtained;

[0032] Step 2, the primary forging billet that obtains in step 1 is (T β Under the condition of -15℃), carry out 4 times of upsetting and drawing forging, wherein, ...

Embodiment 2

[0037] This embodiment includes the following steps:

[0038] Step 1. Peel the cylindrical TC4 titanium alloy ingot with a specification of Ф820mm×950mm (section diameter×length) to a specification of Ф790mm×550mm (section diameter×length), and then carry out 3 times of billet forging. Among them, the first The initial forging temperature of the first fire blank forging is 1150°C, the final forging temperature is 940°C, the total forging ratio is 6.0, air cooling after forging, the initial forging temperature of the second fire blank forging is 1100°C, and the final forging temperature is 920 ℃, the total forging ratio is 9.6, air cooling after forging, the initial forging temperature of the third fire forging is 1050°C, the final forging temperature is 920°C, the total forging ratio is 10.2, air cooling after forging, and the billet opening for each fire After forging, the surface of the TC4 titanium alloy ingot is subjected to surface grinding treatment to obtain the primary...

Embodiment 3

[0044] This embodiment includes the following steps:

[0045] Step 1. Peel the cylindrical TC4 titanium alloy ingot with a specification of Ф640mm×550mm (section diameter×length) to a specification of Ф609mm×550mm (section diameter×length), and then carry out 3 times of billet forging. Among them, the first The initial forging temperature of the first billet forging is 1150°C, the final forging temperature is 910°C, the total forging ratio is 8.4, air cooling after forging, the initial forging temperature of the second billet forging and the third billet forging are the same The final forging temperature is 1070°C, the final forging temperature is 920°C, the total forging ratio is 10.2, air-cooled after forging, and the surface of the TC4 titanium alloy ingot is ground after each firing forging to obtain the primary forging billet;

[0046] Step 2, the primary forging billet that obtains in step 1 is (T β Under the condition of -25℃), carry out 3 times of upsetting forging, w...

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Abstract

The invention discloses a short-process preparation method of TC4 titanium alloy fine equiaxed microstructure and large-scale bar. Forging billets; 2. Use a large-tonnage press to carry out upsetting and drawing forging on the primary forging billet, and quickly cool it to room temperature to obtain an intermediate forging billet; 3. Use a large-tonnage precision forging machine to perform radial forging on the intermediate forging billet to obtain a finished product Radial forging bar; 4. Perform annealing heat treatment on the finished radial forging bar to obtain large-scale TC4 titanium alloy bar with fine grain structure. The present invention adopts the process of "hot forging billet with large tonnage press + radial forming with large tonnage precision forging machine", so that the crystal grains are fully broken and refined, the efficiency of grain refinement is improved, the number of forging fires is significantly reduced, and the time is shortened. The preparation process reduces the production cost and improves the yield of the TC4 titanium alloy bar.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy material processing, and in particular relates to a short-process preparation method for TC4 titanium alloy fine equiaxed and large-scale rods. Background technique [0002] Titanium alloy has excellent characteristics such as low density, high specific strength, corrosion resistance and high temperature resistance. It is an ideal structural material and plays an extremely important role in the development of high-tech national defense, weaponry and civilian industries. TC4 titanium alloy has a series of excellent characteristics such as simple composition, good machinability, high specific strength, good matching of strength and toughness, and long-term use at 400 ° C. It is currently the most widely used structural titanium alloy. Aeroengine blades and gas turbine blades made of titanium alloys have a significant weight reduction effect compared with steel blades, which can significantly ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/18B21J1/02
CPCB21J1/025C22F1/002C22F1/183
Inventor 侯智敏王兴杨健吴晓东张智康聪李维杨佩李进元任利娜欧阳文博
Owner WESTERN TITANIUM TECH
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