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
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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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