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Beta type titanium alloy and method for producing same

A titanium alloy, weight percentage technology, applied in the field of β-type titanium alloy, to achieve the effect of high strength, easy processing and reducing energy consumption

Inactive Publication Date: 2008-12-03
BEIJING AVIATION MATERIAL INST NO 1 GRP CORP CHINA AVIATION IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiency that the prior art cannot satisfy both high strength and high plasticity at the same time, the present invention provides a β-type titanium alloy that can have both high strength and good plasticity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The weight percentage composition of titanium alloy is: molybdenum 9%, niobium 10%, tantalum 2%, zirconium 6%, aluminum 1%, the balance is titanium and unavoidable impurities, wherein the weight percentage of impurities is: iron 1.0%, carbon 0.1%, nitrogen 0.05%, hydrogen 0.015%, oxygen 0.02%.

[0019] The preparation method of the titanium alloy comprises the following steps:

[0020] 1. Use 0-grade sponge titanium, industrial pure aluminum, atomic energy grade sponge zirconium, Ti-31% Mo, Ti-53% Nb, Al-80% Ta as raw materials, and the proportion by weight is Mo: 9%, Nb: 10%, Ta: 6%, Zr: 2%, Al: 3% mixed with 5Kg, pressed into a consumable electrode with a 500-ton hydraulic press;

[0021] 2. After smelting in a 10Kg class vacuum consumable electric arc furnace, the melting temperature is 1950°C, and the ingot is obtained once in the crystallizer;

[0022] 3. The primary ingot is used as the consumable electrode for secondary smelting, the melting temperature is 1870...

Embodiment 2

[0027] The weight percentage composition of titanium alloy is: molybdenum 15%, niobium 6%, tantalum 6%, zirconium 2%, aluminum 3%, the balance is titanium and unavoidable impurities, wherein the weight percentage of impurities is: iron 0.5%, carbon 0.05%, nitrogen 0.025%, hydrogen 0.01%, oxygen 0.01%.

[0028] The preparation method of the titanium alloy comprises the following steps:

[0029] 1. Use 0-grade sponge titanium, industrial pure aluminum, atomic energy grade sponge zirconium, Ti-31% Mo, Ti-53% Nb, Al-80% Ta as raw materials, and the composition ratio is Mo: 15%, Nb: 6 %, Ta: 2%, Zr: 2%, Al: 3% mixed with 5Kg, pressed into a consumable electrode with a 500-ton hydraulic press;

[0030] 2. After smelting in a 10Kg class vacuum consumable electric arc furnace, the melting temperature is 1875°C, and the ingot is obtained once in the crystallizer;

[0031] 3. The primary ingot is used as the consumable electrode for secondary smelting, the melting temperature is 1800°...

Embodiment 3

[0036] The weight percentage composition of titanium alloy is: molybdenum 12%, niobium 8%, tantalum 4%, zirconium 4%, aluminum 2%, the balance is titanium and unavoidable impurities, wherein the weight percentage of impurities is: iron 0.02%, carbon 0.03%, nitrogen 0.01%, hydrogen 0.005%, oxygen 0.005%.

[0037] The preparation method of the titanium alloy comprises the following steps:

[0038] 1. Use 0-grade sponge titanium, industrial pure aluminum, atomic energy grade sponge zirconium, Ti-31% Mo, Ti-53% Nb, Al-80% Ta as raw materials, and the composition ratio is Mo: 12%, Nb: 8 %, Ta: 4%, Zr: 2%, Al: 3% mixed with 5Kg, pressed into a consumable electrode with a 500-ton hydraulic press;

[0039] 2. After smelting in a 10Kg class vacuum consumable electric arc furnace, the melting temperature is 1780°C, and obtain an ingot in the crystallizer once;

[0040] 3. The primary ingot is used as the consumable electrode for secondary smelting, the melting temperature is 1730°C, a...

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Abstract

The invention discloses a beta-Ti alloy, which comprises the components by weight percentage as follows: molybdenum is 9 to 15 percent, niobium is 6 to 10 percent, tantalum is 2 to 6 percent, zirconium is 2 to 6 percent, aluminum is 1 to 3 percent, ferrum is less than or equal to 1.0 percent, carbon is less than or equal to 0.1 percent, nitrogen is less than or equal to 0.05 percent, hydrogen is less than or equal to 0.015 percent, oxygen is less than or equal to 0.02 percent, and titanium is in the balancing amount. A preparation method comprises the steps as follows: sponge titanium, pure aluminium, sponge zirconium, Ti-Mo (the Mo is 31 percent), Ti-Nb (Nb is 53 percent) and Al-Ta (Ta is 80 percent) are mixed and made into a consumable electrode; the consumable electrode is smelted through a vacuum consumable electrode arc furnace to obtain a primary cast ingot; the primary cast ingot is used as the consumable electrode and is smelted to obtain a secondary cast ingot; the secondary cast ingot is used as the consumable electrode and is processed through vacuum consumable smelting to obtain finished products that is titanium alloy ingot. The beta-Ti alloy not only has high hardness, but also has higher unit extension and plasticity, and not only satisfies the intensity of application requirement, but also is easy to manufacture and mold and reduces the energy consumption.

Description

technical field [0001] The invention relates to a β-type titanium alloy and a preparation method thereof. Background technique [0002] High-strength and tough titanium alloys are mainly used in forging, deformation processing and supplemented by heat treatment in the application field of materials, and are used in aviation, aerospace and other structural parts that require high strength and toughness as structural parts. Especially in the field of aviation, from the perspective of aircraft and engine design weight reduction, it is often hoped to use high-strength titanium alloy materials with light weight and high specific strength instead of relatively heavy structural steel materials. [0003] β-type titanium alloy has good heat treatment strengthening characteristics, excellent formability, large specific strength, deep hardenability, and can obtain high strength-plasticity-toughness matching, making this alloy an important structural materials. The literature [O.M.Iva...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22B9/20
Inventor 常辉朱知寿李金山王新南寇宏超商国强薛祥义周廉
Owner BEIJING AVIATION MATERIAL INST NO 1 GRP CORP CHINA AVIATION IND
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