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A high-temperature titanium alloy suitable for use at a temperature of 650°C

A high-temperature titanium alloy and intermediate alloy technology, applied in the field of high-temperature titanium alloy and its preparation, can solve the problems of insufficient oxidation resistance and poor strength, and achieve the effects of excellent oxidation resistance, excellent mechanical properties, high strength and plasticity

Inactive Publication Date: 2016-08-17
HARBIN INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problem that the service temperature of existing titanium alloys is generally below 600°C. When the temperature of the titanium alloy is above 650°C, there are problems of poor strength and insufficient oxidation resistance. High temperature titanium alloy and preparation method thereof

Method used

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  • A high-temperature titanium alloy suitable for use at a temperature of 650°C
  • A high-temperature titanium alloy suitable for use at a temperature of 650°C
  • A high-temperature titanium alloy suitable for use at a temperature of 650°C

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specific Embodiment approach 1

[0021] Embodiment 1: A high-temperature titanium alloy suitable for use at a temperature of 650°C is composed of 5% to 7% of Al, 4% to 6% of Sn, 9% to 12% of Zr, and 0.7% to 1.0% by weight. %Mo, 0.1%~0.3%Si, 1%~2%Nb, 1%~2%W, 0.1%~0.5%Y, 0.3%~0.8%B and the balance is Ti composition, the above is suitable for 650 The tensile strength of the high-temperature titanium alloy used at ℃ is 553MPa-572MPa, the yield strength is 431.0MPa-460MPa, and the elongation is 6.0%-8.4%.

[0022] According to the GB / T 4338-2006 standard, a high-temperature titanium alloy suitable for use at a temperature of 650°C in this embodiment is tested at a tensile temperature of 650°C. The tensile strength is 553MPa~572MPa, and the yield strength is 431.0MPa~ 460MPa, the elongation is 6.0% to 8.4%.

[0023] In this specific embodiment, the high-temperature titanium alloy ingot after hot isostatic pressing is kept at a temperature of 933° C. to 975° C. for 1 h to 3 h, that is, the temperature is 8° C. to 5...

specific Embodiment approach 2

[0027] Specific embodiment two: a preparation method of high-temperature titanium alloy suitable for use at a temperature of 650 ° C is carried out according to the following steps:

[0028] 1. Weigh each component: 5% to 7% of Al, 4% to 6% of Sn, 9% to 12% of Zr, 0.7% to 1.0% of Mo, 0.1% to 0.3% according to the weight percentage of each element %Si, 1%~2%Nb, 1%~2%W, 0.1%~0.5%Y, 0.3%~0.8%B and the balance is Ti, respectively weigh sponge titanium, high-purity aluminum ingot, high-purity sponge zirconium , high-purity tin ingots, Al-Mo master alloys, Al-Nb master alloys, Al-W master alloys, Al-Si master alloys, Al-Y master alloys and boron-containing raw materials as raw materials;

[0029] 2. Melting: The raw material weighed in step 1 is prepared by using a water-cooled copper crucible vacuum induction melting method or a vacuum consumable electrode arc melting method to obtain a high-temperature titanium alloy ingot;

[0030] 3. Hot isostatic pressing treatment: under the ...

specific Embodiment approach 3

[0034] Specific embodiment three: the difference between this embodiment and specific embodiment two is that: the sponge titanium described in step one is grade 0 sponge titanium with a purity >99.9wt.%; the purity of the high-purity aluminum ingot described in step one is >99.99wt.%; the purity of the high-purity zirconium sponge described in step one is >99.7wt.%; the purity of the high-purity tin ingot described in step one is >99.7wt.%; the Al-Mo intermediate The Mo content in the alloy is 50wt.%~60wt.%; the Nb content in the Al-Nb master alloy described in step 1 is 50wt.%~60wt.%; the W content in the Al-W master alloy described in step 1 50wt.%~70wt.%; the Si content in the Al-Si master alloy described in step 1 is 10wt.%~20wt.%; the Y content in the Al-Y master alloy described in step 1 is 70wt.% ~80wt.%; the boron-containing raw material described in step one is boron powder. Others are the same as in the second embodiment.

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Abstract

The invention relates to a high-temperature titanium alloy applicable to use at the temperature of 650 DEG C and a preparation method thereof. The invention relates to the high-temperature titanium alloy and the preparation method thereof. The invention aims to solve the problems that the strength is poor and the resistance to oxidation is insufficient when the titanium alloy is at the temperature of more than 650 DEG C since the usage temperature of the existing titanium alloy is generally under 600 DEG C. The high-temperature titanium alloy applicable to use at the temperature of 650 DEG C is formed by Al, Sn, Zr, Mo, Si, Nb, W, Y, B and the balance of Ti. The method comprises the following steps of (1) weight each component; (2) smelting; (3) hot isostatic pressure processing; (4) heat treating, thus obtaining the high-temperature titanium alloy applicable to being used at the temperature of 650 DEG C. The invention provides the high-temperature titanium alloy applicable to being used at the temperature of 650 DEG C and the preparation method thereof.

Description

technical field [0001] The invention relates to a high-temperature titanium alloy and a preparation method thereof. Background technique [0002] Titanium alloys are widely used in the aerospace field due to their excellent properties. With the increase of the flight speed of aviation and aerospace vehicles, the requirements for the operating temperature of aircraft structural components are getting higher and higher. Conventional titanium alloys can no longer meet the requirements of the operating temperature for materials. Lightweight heat-resistant high-temperature titanium alloy structural material. [0003] For titanium alloys, near-α-type titanium alloys have better high-temperature strength and plasticity, and are especially suitable for the use of titanium alloys at high temperatures. Therefore, most of the current high-temperature titanium alloys are near-α-type titanium alloys. Among them, Ti-Al-Sn-Zr-Mo-Si titanium alloys dominate. Ti-1100 in the United States,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22C1/03C22F1/18
Inventor 陈玉勇肖旅肖树龙王宝兵徐丽娟李宝辉田竟李中权田莹
Owner HARBIN INST OF TECH
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