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A high temperature oxidation resistant w-cr-ti composite material

A technology of anti-high temperature oxidation and composite materials, which is applied in the field of metal composite materials and its preparation, to achieve the effects of improving stability, improving bonding ability, and reducing cracks

Active Publication Date: 2019-12-27
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of doping W-Cr alloy with W-Ti pre-alloyed powder has not been reported.

Method used

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  • A high temperature oxidation resistant w-cr-ti composite material
  • A high temperature oxidation resistant w-cr-ti composite material
  • A high temperature oxidation resistant w-cr-ti composite material

Examples

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Embodiment 1

[0025] In this embodiment, the high-temperature oxidation-resistant W-Cr-Ti composite material, its doping raw materials are W-12Cr alloy powder and W-5Ti alloy powder, wherein each component is constituted by mole percentage: W-12Cr 90%, W- 5Ti 10%.

[0026] The primary powder particle size is: W-12Cr alloy powder particle size is 5.2 microns, W-5Ti alloy powder particle size is 4 microns.

[0027] The preparation method of the high temperature oxidation resistant W-Cr-Ti composite material in this embodiment comprises the following steps:

[0028] 1. Powder making: Mix W-12Cr alloy powder and W-5Ti alloy powder according to the ratio, and stir in a powder mixer at 400 rpm for 2 hours to obtain W-Cr-Ti dual-phase composite powder;

[0029] 2. Sintering: Put the W-Cr-Ti dual-phase composite powder into the graphite mold, then put the mold into the discharge plasma sintering furnace, evacuate the sintering furnace at room temperature, raise the temperature to 1500 ° C for 3 mi...

Embodiment 2

[0033] In the high temperature oxidation resistant W-Cr-Ti composite material in this example, its doping raw materials are W-12Cr alloy powder and W-5Ti alloy powder, wherein each component is constituted by mole percentage: W-12Cr 80%, W- 5Ti 20%.

[0034] The primary powder particle size is: W-12Cr alloy powder particle size is 5.2 microns, W-5Ti alloy powder particle size is 4 microns.

[0035] The preparation method of the high temperature oxidation resistant W-Cr-Ti composite material in this embodiment comprises the following steps:

[0036] 1. Powder making: Mix W-12Cr alloy powder and W-5Ti alloy powder according to the ratio, and stir in a powder mixer at 400 rpm for 2 hours to obtain W-Cr-Ti dual-phase composite powder;

[0037] 2. Sintering: Put the W-Cr-Ti dual-phase composite powder into the graphite mold, then put the mold into the discharge plasma sintering furnace, evacuate the sintering furnace at room temperature, raise the temperature to 1500 ° C for 3 min...

Embodiment 3

[0041] In this embodiment, the high-temperature oxidation-resistant W-Cr-Ti composite material, its doping raw materials are W-12Cr alloy powder and W-5Ti alloy powder, wherein each component is constituted by mole percentage: W-12Cr 70%, W- 5Ti 30%.

[0042] The primary powder particle size is: W-12Cr alloy powder particle size is 5.2 microns, W-5Ti alloy powder particle size is 4 microns.

[0043] The preparation method of the high temperature oxidation resistant W-Cr-Ti composite material in this embodiment comprises the following steps:

[0044]1. Powder making: Mix W-12Cr alloy powder and W-5Ti alloy powder according to the ratio, and stir in a powder mixer at 400 rpm for 2 hours to obtain W-Cr-Ti dual-phase composite powder;

[0045] 2. Sintering: Put the W-Cr-Ti dual-phase composite powder into the graphite mold, then put the mold into the discharge plasma sintering furnace, evacuate the sintering furnace at room temperature, raise the temperature to 1500 ° C for 3 min...

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Abstract

The invention discloses a high temperature oxidation-resisting W-Cr-Ti composite material and a preparation method thereof. Doping raw materials of the high temperature oxidation-resisting W-Cr-Ti composite material are composed of, by molar percentage, 70-90% of W-12Cr alloy powder and 10-30% of W-5Ti alloy powder. The W-Cr-Ti composite material significantly improves the high temperature oxidation resistance of a tungsten-based material, and after 15 hours of oxidation, the weight gain rate is only 1 / 3-1 / 5 of a pure tungsten material.

Description

technical field [0001] The invention relates to a metal composite material and a preparation method thereof, in particular to a high-temperature oxidation-resistant W-Cr-Ti composite material and a preparation method thereof. Background technique [0002] The research and development of new ultra-high temperature materials with high strength, toughness and ablation resistance is of great significance for the manufacture of hypersonic vehicles. The refractory metal tungsten has the advantages of high melting point (3410°C), low thermal expansion coefficient, and high thermal shock resistance, and is considered to be one of the best candidate materials for aerospace applications. However, the existing coatings and preparation methods cannot meet the requirements of high temperature resistance, long-term ablation resistance, and high temperature oxidation resistance in adjacent spaces. Therefore, the development of smart alloys with self-passivation function is the research fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F3/105C22C27/04C22C1/04
CPCB22F1/0003B22F3/105B22F2003/1051B22F2998/10C22C1/045C22C27/04
Inventor 罗来马黄科刘家琴昝祥刘东光朱晓勇吴玉程
Owner HEFEI UNIV OF TECH
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