A kind of high temperature resistant tungsten-molybdenum alloy and its preparation method

A technology of tungsten-molybdenum alloy and metal powder, which is applied in the field of high-temperature-resistant tungsten-molybdenum alloy and its preparation, can solve the problems of poor thermal resistance of tungsten alloy and cannot meet the needs of automobile development, and achieve the effect of high strength

Active Publication Date: 2018-03-27
天津市程田新能源股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the invention is to provide a high-temperature-resistant tungsten-molybdenum alloy and its preparation method, which can improve the high-temperature resistance of the tungsten alloy and prolong its service life, so as to overcome the poor thermal resistance of the tungsten alloy in the prior art, which cannot meet the needs of automobiles. The question of development needs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A high-temperature-resistant tungsten-molybdenum alloy, the weight percentages of each group are as follows, tungsten: 50%, molybdenum: 30%, rhenium: 15%, zirconium: 4.5%, impurities: 0.5%, and the sum of the weight percentages of the above components is 100 %.

[0019] The preparation method comprises the following steps:

[0020] 1) Dehydrate tungsten, molybdenum, zirconium and rhenium metal powders in vacuum for 1.5 hours, and pass through a 600-mesh sieve;

[0021] 2) Add the sieved powder into a V-shaped mixer, the mixing time is 25 hours, and the rotating speed is 50 rpm.

[0022] 3) Cold press the uniformly mixed powder under the protection of argon. The pressure control range is 200MPa. After pressing, place it in a smelting furnace and sinter at 2300°C for 15 hours. After sintering, cool down to 900°C Processing, made into filaments or ribbons.

[0023] The performance is measured at 1000°C, the uniaxial tensile strength can reach 600MPa, the yield stress ca...

Embodiment 2

[0025] A high-temperature-resistant tungsten-molybdenum alloy, the weight percentages of which are as follows, tungsten: 55%, molybdenum: 25%, rhenium: 15%, zirconium: 4%, impurities: 1%, and the sum of the weight percentages of the above components is 100 %.

[0026] The preparation method comprises the following steps:

[0027] 1) Dehydrate tungsten, molybdenum, zirconium and rhenium metal powders in vacuum for 1-3 hours, and pass through 800 mesh sieve;

[0028] 2) Add the sieved powder into a V-type mixer, the mixing time is 30 hours, and the rotation speed is 60 rpm.

[0029] 3) Cold press the uniformly mixed powder under the protection of nitrogen. The pressure control range is 280MPa. After pressing, put it in a smelting furnace and sinter it at 2500°C for 17 hours. After sintering, cool it down to 1200°C. Processing, made into filaments or strips.

[0030] The performance test is carried out at 1200°C, the uniaxial tensile strength can reach 750MPa, the yield stress...

Embodiment 3

[0032] A high-temperature-resistant tungsten-molybdenum alloy, the weight percentages of each group are as follows, tungsten: 60%, molybdenum: 27%, rhenium: 10%, zirconium: 2%, impurities: 1%, the sum of the weight percentages of the above components is 100 %.

[0033] The preparation method comprises the following steps:

[0034] 1) Dehydrate the tungsten, molybdenum, zirconium and rhenium metal powders in vacuum for 2.5 hours, and pass through a 1000-mesh sieve;

[0035] 2) Add the sieved powder into a V-type mixer, the mixing time is 28 hours, and the rotation speed is 60 rpm.

[0036] 3) Cold press the uniformly mixed powder under the protection of helium. The pressure control range is 300MPa. After pressing, place it in a smelting furnace and sinter at 2600°C for 18 hours. After sintering, cool down to 900°C Processing, made into filaments or ribbons.

[0037] The performance is measured at 900°C, the uniaxial tensile strength can reach 650MPa, the yield stress can rea...

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Abstract

The invention provides a high-temperature resistant tungsten-molybdenum alloy and a preparation method thereof. The weight percentages of each group are as follows: tungsten: 50-80%, molybdenum: 35-50%, rhenium: 10-30%, zirconium: 2-5%, Impurities: 0.1-1%. The preparation method is to mix various metal powders evenly, dehydrate in a vacuum, sieve, and mix. After pressing, they are placed in a smelting furnace for sintering. After sintering, they are cooled and made into filaments or ribbons. The preparation method of the invention has a simple process, good material properties, and good high temperature resistance, and is particularly suitable for making high temperature resistant accessories such as filaments for LED car lights.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a high-temperature-resistant tungsten-molybdenum alloy and a preparation method thereof. Background technique [0002] Tungsten is an important rare metal, which is often used in tungsten heating elements and supports in high-temperature environments. Tungsten heating elements and tungsten supports are key components of this type of equipment, and their performance directly affects the application of the device. The failure of tungsten heating elements is mostly due to structural deformation, which leads to an increase in furnace temperature difference and a decline in product quality. Contents of the invention [0003] The problem to be solved by the invention is to provide a high-temperature-resistant tungsten-molybdenum alloy and its preparation method, which can improve the high-temperature resistance of the tungsten alloy and prolong its service life, so as to overcome the poor t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C27/04C22C1/04
CPCC22C1/045C22C27/04
Inventor 袁茂凯
Owner 天津市程田新能源股份有限公司
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