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Titanium alloy and machining method thereof

A titanium alloy, the obtained technology, applied in the field of titanium alloy, can solve the problems of high price and high production cost

Active Publication Date: 2018-03-09
AECC COMML AIRCRAFT ENGINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Owing to containing the expensive V element of 4% (percentage by weight, the same below) in the Ti-6Al-4V alloy, cause the production cost of Ti-6Al-4V alloy to be higher

Method used

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  • Titanium alloy and machining method thereof
  • Titanium alloy and machining method thereof
  • Titanium alloy and machining method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0113] Obtain a titanium alloy ingot with a nominal composition of Ti-3.5Al-2.5Mo-2Zr-2.3Cr (weight percent, %), open billet forging at 1150°C, and obtain a rod-shaped titanium alloy billet to be processed, Φ160mm, the titanium alloy T β It is 900-915°C.

[0114] 1) Heating the titanium alloy blank to be processed to T β +60°C, keep warm for 100min, then forge, first pier rough deformation 50%, and then elongate deformation 50%, after forging, quickly put into water with a temperature of 15°C to 25°C to cool;

[0115] 2) step 1) gained titanium alloy is heated to T β -30°C, keep warm for 100min, then forge, first pier rough deformation by 50%, and then elongate by 50%, after forging, quickly put into water at a temperature of 15°C to 25°C to cool;

[0116] 3) step 2) gained titanium alloy is heated to T β +20°C, keep warm for 80 minutes, then forge, first pier rough deformation by 50%, then elongate and deform by 50%, after forging, quickly put it into water at a temperatu...

Embodiment 2

[0121] Obtain a titanium alloy ingot with a nominal composition of Ti-3.7Al-3Mo-4Zr-3Cr-0.08Si (weight percent, %), open billet forging at 1150°C, and obtain a rod-shaped titanium alloy billet to be processed, Φ160mm, the titanium alloy the T β It is 895~910℃.

[0122] 1) Heating the titanium alloy blank to be processed to T β+55°C, keep warm for 100min, then forge, first pier rough deformation by 40%, then elongate and deform by 40%, after forging, quickly put into water with a temperature of 15°C to 25°C to cool;

[0123] 2) step 1) gained titanium alloy is heated to T β -35°C, keep warm for 100min, then forge, first pier rough deformation by 40%, then elongate and deform by 40%, after forging, quickly put into water with a temperature of 15°C to 25°C to cool;

[0124] 3) step 2) gained titanium alloy is heated to T β +15°C, keep warm for 80 minutes, then forge, first pier rough deformation by 40%, then elongate and deform by 40%, after forging, quickly put it into water...

Embodiment 3

[0129] Obtain a titanium alloy ingot with a nominal composition of Ti-3Al-4Mo-3Zr-1Fe (weight percent, %), open billet forging at 1150°C, and obtain a rod-shaped titanium alloy billet to be processed, Φ160mm, the T of the titanium alloy β It is 905-920°C.

[0130] 1) Heating the titanium alloy blank to be processed to T β +65°C, keep warm for 100min, then forge, first pier rough deformation by 50%, and then elongate by 50%, after forging, quickly put into water with a temperature of 15°C to 25°C to cool;

[0131] 2) step 1) gained titanium alloy is heated to T β -25°C, keep warm for 100min, then forge, first pier rough deformation by 50%, and then elongate by 50%, after forging, quickly put into water at a temperature of 15°C to 25°C to cool;

[0132] 3) step 2) gained titanium alloy is heated to T β +25°C, keep warm for 80 minutes, then forge, first pier rough deformation 50%, then elongate deformation 50%, after forging, quickly put into water with a temperature of 15°C t...

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Abstract

The invention provides a titanium alloy and a machining method thereof. The method for machining the titanium alloy comprises the following steps that (1) the titanium alloy needing to be machined isheated to be T beta+55-T beta+65 DEG C, heat preservation is conducted, then forging is conducted, and cooling is conducted; (2) the titanium alloy obtained in the step (1) is heated to be T beta-35-Tbeta-25 DEG C, heat preservation is conducted, then forging is conducted, and cooling is conducted; (3) the titanium alloy obtained in the step (2) is heated to be T beta+15-T beta+25 DEG C, heat preservation is conducted, then forging is conducted, and cooling is conducted; (4) the titanium alloy obtained in the step (3) is heated to be T beta-75-T beta-65 DEG C, heat preservation is conducted,then forging is conducted, and cooling is conducted; (5) the titanium alloy obtained in the step (4) is heated to be T beta-120-T beta-90 DEG C, heat preservation is conducted, then forging is conducted, and cooling is conducted; and (6) the titanium alloy obtained in the step (5) is heated to be T beta-350-T beta-300 DEG C, heat preservation is conducted, and cooling is conducted. The titanium alloy which is machined by adopting the method has an improved mechanical property, and particularly the indoor temperature ductility is improved.

Description

technical field [0001] The invention belongs to the field of titanium alloys, and in particular relates to a titanium alloy and a processing method thereof. Background technique [0002] Titanium and titanium alloys are widely used in aviation, aerospace, weapons, automobiles and other industrial fields due to their high specific strength and good corrosion resistance. So far, dozens of titanium alloys have been successfully developed at home and abroad, among which the most widely used is an α+β type titanium alloy, Ti-6Al-4V alloy. [0003] In all titanium alloy application fields such as aviation, automobile, energy, ship, chemical industry, medical equipment and sporting goods, the proportion of Ti-6Al-4V alloy accounts for more than 50%. Since the Ti-6Al-4V alloy contains 4% (weight percent, the same below) of the expensive V element, the production cost of the Ti-6Al-4V alloy is relatively high. [0004] Chinese patent CN 102212716A discloses a new type of α+β-type t...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22F1/18
Inventor 雷力明
Owner AECC COMML AIRCRAFT ENGINE CO LTD
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