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W-Mo-Re-HfC alloy material and preparation method thereof

A technology of w-mo-re-hfc and alloy material, applied in the field of W-Mo-Re-HfC alloy material and its preparation, can solve the problems of insignificant rhenium effect of tungsten-rhenium alloy, unable to meet the requirements of use, etc., and achieve excellent Room temperature and high temperature mechanical properties, overcoming the reduction of mechanical properties, the effect of excellent mechanical properties

Inactive Publication Date: 2018-11-13
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The addition of rhenium can significantly improve the mechanical properties of tungsten alloy and increase its recrystallization temperature, but when the rhenium content is low, the rhenium effect of tungsten-rhenium alloy is not obvious, especially its ductile-brittle transition temperature is above room temperature, therefore, in Brittle at room temperature
However, with the development of related fields, higher requirements are put forward for the high temperature performance of W-Re alloys. At present, the performance of traditional W-Re alloys can no longer meet the requirements of use. High-temperature mechanical properties and anti-ablation properties solve the problem that traditional tungsten-rhenium alloys can no longer meet the requirements for use at ultra-high temperatures

Method used

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  • W-Mo-Re-HfC alloy material and preparation method thereof
  • W-Mo-Re-HfC alloy material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The W-Mo-Re-HfC alloy material of this embodiment is made of the following raw materials in mass percentage: Mo 10%, Re 25%, HfC 0.2%, and the balance is W and unavoidable impurities.

[0023] The preparation method of the W-Mo-Re-HfC alloy material of the present embodiment comprises the following steps:

[0024] Step 1. Put molybdenum powder, rhenium powder, hafnium carbide powder and tungsten powder in a planetary ball mill and mix them evenly to obtain a composite powder; the mass purity of the molybdenum powder, rhenium powder, hafnium carbide powder and tungsten powder is not less than 99% %; the particle size of the molybdenum powder is not greater than 5 μm, the particle size of the rhenium powder is not greater than 5 μm, the particle size of the hafnium carbide powder is not greater than 1 μm, and the particle size of the tungsten powder is not greater than 6 μm; The ratio is 3:1, and the ball milling time is 10h;

[0025] Step 2. Perform a reduction reaction...

Embodiment 2

[0029] The W-Mo-Re-HfC alloy material of this embodiment is made of the following raw materials in mass percentage: Mo 15%, Re 20%, HfC 1%, the balance is W and unavoidable impurities.

[0030] The preparation method of the W-Mo-Re-HfC alloy material in this embodiment is the same as that in Embodiment 1. The fracture toughness of the W-Mo-Re-HfC alloy material prepared in this example is 38.4MPa m at room temperature of 25°C 1 / 2 , the compressive strength is 2688MPa, the compressive strain is 12%; the compressive strength at 1300°C is 714MPa. At the same time, the W-Mo-Re-HfC alloy material prepared in this embodiment is resistant to erosion and ablation in an ultra-high temperature environment of 2000° C., and meets the requirements for ultra-high temperature use.

Embodiment 3

[0032] The W-Mo-Re-HfC alloy material of this embodiment is made of the following raw materials in mass percentage: Mo 20%, Re 13%, HfC 5%, the balance is W and unavoidable impurities.

[0033] The preparation method of the W-Mo-Re-HfC alloy of the present embodiment comprises the following steps:

[0034] Step 1. Put molybdenum powder, rhenium powder, hafnium carbide powder and tungsten powder in a planetary ball mill and mix them evenly to obtain a composite powder; the mass purity of the molybdenum powder, rhenium powder, hafnium carbide powder and tungsten powder is not less than 99% %; the particle size of the molybdenum powder is not greater than 5 μm, the particle size of the rhenium powder is not greater than 5 μm, the particle size of the hafnium carbide powder is not greater than 1 μm, and the particle size of the tungsten powder is not greater than 6 μm; The ratio is 6:1, and the ball milling time is 15h;

[0035] Step 2. Perform a reduction reaction on the composi...

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Abstract

The invention discloses a W-Mo-Re-HfC alloy material. The W-Mo-Re-HfC alloy material is prepared from the following raw materials by weight: 10% to 30% of molybdenum, 1% to 25% of rhenium, 0.2% to 10%of hafnium carbonate and the balances tungsten and inevitable impurities. The invention further provides a preparation method of the W-Mo-Re-HfC alloy material. The preparation method comprises the following steps of: (I) carrying out ball milling and uniformly mixing molybdenum powder, rhenium powder, hafnium carbonate powder and tungsten powder; and carrying out crushing and sieving after hydrogen reduction to obtain mixed powder; and (II) sintering the mixed powder in a vacuum hot-press sintering furnace, and then cooling the mixed powder with the furnace to obtain the W-Mo-Re-HfC alloy material. The preparation method of the W-Mo-Re-HfC alloy material disclosed by the invention is simple in a technological process; the prepared alloy material is low in oxygen content; the microstructure is uniform; a base body consists of W, Mo and Re solid solution phases; good plasticity is realized; submicron and nanometer HfC phases are uniformly distributed in the base body so that the alloymaterial is excellent in plasticity and also has good room-temperature and high-temperature strength.

Description

technical field [0001] The invention belongs to the technical field of alloy material preparation, and in particular relates to a W-Mo-Re-HfC alloy material and a preparation method thereof. Background technique [0002] Tungsten-rhenium alloy is widely used in ultra-high temperature structural materials, nuclear industry, aerospace, military equipment, electronics industry and other fields due to its extremely high melting point and excellent room temperature and high temperature mechanical properties. The addition of rhenium can significantly improve the mechanical properties of tungsten alloy and increase its recrystallization temperature, but when the rhenium content is low, the rhenium effect of tungsten-rhenium alloy is not obvious, especially its ductile-brittle transition temperature is above room temperature, therefore, in Brittle at room temperature. However, with the development of related fields, higher requirements are put forward for the high temperature perfo...

Claims

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Application Information

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IPC IPC(8): C22C27/04C22C32/00C22C1/05
Inventor 李斌林小辉李来平梁静薛建嵘李延超
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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