Forging method of tc4 titanium alloy bar

A titanium alloy and bar technology, applied in the field of TC4 titanium alloy bar forging, can solve the problems of unguaranteed quality of titanium alloy bar products, short discharge time, large randomness, etc.

Active Publication Date: 2019-05-21
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

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Problems solved by technology

In order to ensure the microstructure uniformity and stable performance of titanium alloy rods, the current general practice is to control the discharge time in the actual operation process, requiring the discharge time to be as short as possible to reduce the temperature drop. However, this method is practical There is a lot of randomness in the operation, and the quality of the obtained titanium alloy bar products cannot be guaranteed

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  • Forging method of tc4 titanium alloy bar
  • Forging method of tc4 titanium alloy bar
  • Forging method of tc4 titanium alloy bar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Forging steps of TC4 titanium alloy rod with a diameter of 50mm:

[0049] Heat the titanium alloy ingot to 170°C (i.e. 1150°C) above the β-transition point temperature (980°C in this example) and keep it warm for 35 minutes. The amount of deformation is 45%; reheat to 120°C above the β phase transition point temperature and hold for 35 minutes, then carry out the second elongation forging for 3 fires, and the deformation amount of the single fire time is 35%; reheat to the β phase transition point temperature After the temperature below 30°C and the heat preservation for 35 minutes, the third elongation forging was carried out 3 times, and the deformation amount of the single firing time was 40%, so as to obtain a titanium alloy forging billet.

[0050] The titanium alloy forging billet was heated to 35°C below the β transformation point temperature and held for 35 minutes, and then precision forged to obtain a TC4 titanium alloy rod with a diameter of 50 mm. Among the...

Embodiment 2

[0052] Forging steps for TC4 titanium alloy rods with a diameter of 30mm:

[0053] Heat the titanium alloy ingot to 160°C (i.e. 1150°C) above the β transformation point temperature (990°C in this example) and keep it warm for 8 minutes, then perform the first elongation forging with 2 fires, and the single fire The amount of deformation is 30%; reheat to 100°C above the β phase transition point temperature and keep it warm for 21 minutes, then perform the second elongation forging for 2 fires, and the deformation amount of the single fire time is 45%; reheat to the β phase transition point temperature After holding the temperature below 35°C for 12 minutes, the third elongation forging was carried out for 4 fires, and the deformation amount of a single fire was 35%, so as to obtain a titanium alloy forging billet.

[0054] The titanium alloy forging blank was heated to 10°C below the β transformation point temperature, and precision forged was carried out to obtain a TC4 titan...

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Abstract

The invention provides a TC4 titanium alloy bar material forging method. The method comprises the following steps that a titanium alloy ingot is heated and subjected to drawing-out forging, and then atitanium alloy forged blank is obtained; the titanium alloy forged blank is heated to 10 DEG C to 50 DEG C below beta-phase point-change temperature, precise forging is conducted, and then a TC4 titanium alloy bar material is obtained, wherein an induction heating technology is adopted in the precise forging process for enabling temperature of the titanium alloy forged blank to be kept 10 DEG C to 50 DEG C below the beta-phase point-change temperature. According to the TC4 titanium alloy bar material forging method, the technology during the precise forging process is improved according to the problems found in the researching process, and the induction heating technology is adopted in the precise forging process for temperature compensation to enable the temperature of the titanium alloyforged blank to be kept 10 DEG C to 50 DEG C below the beta-phase point-change temperature, so that the problem that the quality of products is affected due to improper control over the discharging time in the precise forging process is avoided, structure uniformity and stable performance of the TC4 titanium alloy bar material are guaranteed, and the quality of the products is reliable.

Description

technical field [0001] The invention relates to the technical field of titanium alloy smelting, in particular to a method for forging TC4 titanium alloy rods. Background technique [0002] With the development of the aviation industry, in order to meet the lightweight of aviation equipment, higher requirements are put forward for titanium alloy rods. During forging, the billet needs to be transferred from the heating furnace to the forging equipment during the process of heating and discharging in the heating furnace to forging. This process is called discharging. The temperature of the billet will inevitably drop during the discharging process, so that the temperature of the billet will be lower than the heating temperature when the forging is started. In order to ensure the microstructure uniformity and stable performance of titanium alloy rods, the current general practice is to control the discharge time in the actual operation process, requiring the discharge time to b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J1/04B21J1/06B21J5/00C22F1/18
Inventor 张辉刘兴张卓敏李杰黄德超
Owner 湖南湘投金天钛业科技股份有限公司
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