Preparation method of titanium, aluminum, niobium, zirconium and molybdenum alloy

Abstract

The invention discloses a preparation method of a titanium, aluminum, niobium, zirconium and molybdenum alloy, and belongs to the technical field of preparation of titanium alloys. The method comprises the following steps: weighing Ti, Al, Nb, Zr and Mo metal powder according to certain proportions, mixing the metal powder, performing intermittent dry type ball grinding through a ball grinder to obtain mixed powder, putting the obtained mixed powder into a graphite mold, prepressing the mixed powder, placing the graphite mold into a discharge plasma sintering furnace, applying axial pressure of 10 to 50 MPa for sintering under the condition that the vacuum degree is 2 to 8 Pa, heating the mixed powder in a multi-stage heating mode to 1,000 to 1,150 DEG C, preserving the heat for 3 to 8 min, cooling the mixture to room temperature, and demolding the mixture, thus obtaining the titanium, aluminum, niobium, zirconium and molybdenum alloy material. The titanium, aluminum, niobium, zirconium and molybdenum alloy prepared by the method disclosed by the invention has the advantages of uniform component, high compactness, high intensity, high plasticity and the like; and in addition, the method is easy to operate, short in time, energy-saving and environmentally friendly and has a good popularization value.

Description

technical field

[0001] The invention discloses a method for preparing a titanium-aluminum-niobium-zirconium-molybdenum alloy and belongs to the technical field of titanium alloy preparation. Background technique

[0002] Titanium alloy has the characteristics of specific strength, resistance to seawater and marine atmospheric corrosion, non-magnetic, sound transmission, shock resistance and vibration resistance, and good machinability. It is a high-quality marine engineering material. Due to the high-humidity and high-salt environment in which marine engineering materials are located, the structural parts used must not only have high strength based on pressure resistance, but also require good welding performance and excellent reliability in seawater. No subsequent heat treatment is required. Titanium-aluminum-niobium-zirconium-molybdenum alloy has excellent comprehensive properties such as high strength, high plasticity and toughness, corrosion resistance, and easy welding...

Examples

Embodiment 1

[0021] (1) Weigh metal powder Ti, Al, Nb, Zr, Mo alloy according to mass percentage Al: 6%, Nb: 3%, Zr: 2%, Mo: 1%, Ti: 88%, Ti, Zr , The particle size of the Mo powder is 23 μm, the particle size of the Al powder is 48 μm, the particle size of the Zr powder is 10.5 μm, and the purity is 99.5%.

[0022] (2) Put the metal powder with a good ratio and stearic acid with a mass of 3% of the metal powder mass into the vacuum ball mill tank of the planetary ball mill, add stainless steel balls with a diameter of 3mm according to the ball-to-material ratio of 3:1, and pump it Vacuum to 10Pa and fill with argon, ball mill the mixed powder intermittently for 20 hours at a speed of 200r / min with a pause of 60 minutes every 90 minutes, and then degrease the obtained mixed powder for 2 hours under argon atmosphere at a temperature of 200°C deal with. Put 20g of uniformly mixed powder into a high-strength graphite mold with an inner diameter of 20.5mm, and after adding the upper and lower...

Embodiment 2

[0030] (1) According to the mass percentage of metal powder Ti, Al, Nb, Zr, and Mo alloy, Nb: 4%, Zr: 2%, Mo: 2%, stearic acid: 1%, and the mass percentage of Al is 5%, 6%, 7%, and balance Ti to weigh three parts of mixed powder, the particle size of Ti, Nb, Mo, Zr powder is 70μm, the particle size of Al powder is 100μm, and the purity is 99.5%.

[0031] (2) Put the powder into the vacuum ball mill tank of the planetary ball mill, add stainless steel balls with a diameter of 6 mm according to the ball-to-material ratio of 5:1, vacuumize it to 5 Pa, and fill it with argon gas. Ball milling for 60 minutes and pausing for 60 minutes to intermittently ball mill and mix the powder for 5 hours, and then degrease the obtained mixed powder for 1 hour at a temperature of 400° C. under argon atmosphere.

[0032] (3) Put 10g of mixed powder into a high-strength graphite mold with an inner diameter of 10mm, and add the upper and lower indenters. The powder, the mold and the indenters are ...

Embodiment 3

[0036] (1) Metal powder Ti, Al, Nb, Zr, and Mo alloys with a particle size of 23, 50, and 75 μm were respectively prepared according to the mass percentage of Al: 4.5%, Nb: 2%, Zr: 1%, Mo: 1.2%, stearic acid : 5%, the remainder Ti weighs three parts of mixed powder, the purity is 99.5%.

[0037] (2) Put the powder into the vacuum ball mill tank of the planetary ball mill, add stainless steel balls with a diameter of 5mm according to the ball-to-material ratio of 2:1, vacuumize it to 5Pa, fill it with argon, and mill at a speed of 500r / min per ball Intermittent ball milling and mixing for 20 hours by pausing for 120 minutes for 60 minutes, and then degreasing the obtained mixed powder for 3 hours in an argon atmosphere at a temperature of 300°C.

[0038] (3) Put 30g of mixed powder into a high-strength graphite mold with an inner diameter of 25mm, pre-press at 60MPa, and put it into a spark plasma sintering equipment for sintering. Before sintering, the vacuum degree in the fu...

technical field

[0001] The invention discloses a method for preparing a titanium-aluminum-niobium-zirconium-molybdenum alloy and belongs to the technical field of titanium alloy preparation. Background technique

[0002] Titanium alloy has the characteristics of specific strength, resistance to seawater and marine atmospheric corrosion, non-magnetic, sound transmission, shock resistance and vibration resistance, and good machinability. It is a high-quality marine engineering material. Due to the high-humidity and high-salt environment in which marine engineering materials are located, the structural parts used must not only have high strength based on pressure resistance, but also require good welding performance and excellent reliability in seawater. No subsequent heat treatment is required. Titanium-aluminum-niobium-zirconium-molybdenum alloy has excellent comprehensive properties such as high strength, high plasticity and toughness, corrosion resistance, and easy welding...

Examples

Embodiment 1

[0021] (1) Weigh metal powder Ti, Al, Nb, Zr, Mo alloy according to mass percentage Al: 6%, Nb: 3%, Zr: 2%, Mo: 1%, Ti: 88%, Ti, Zr , The particle size of the Mo powder is 23 μm, the particle size of the Al powder is 48 μm, the particle size of the Zr powder is 10.5 μm, and the purity is 99.5%.

[0022] (2) Put the metal powder with a good ratio and stearic acid with a mass of 3% of the metal powder mass into the vacuum ball mill tank of the planetary ball mill, add stainless steel balls with a diameter of 3mm according to the ball-to-material ratio of 3:1, and pump it Vacuum to 10Pa and fill with argon, ball mill the mixed powder intermittently for 20 hours at a speed of 200r / min with a pause of 60 minutes every 90 minutes, and then degrease the obtained mixed powder for 2 hours under argon atmosphere at a temperature of 200°C deal with. Put 20g of uniformly mixed powder into a high-strength graphite mold with an inner diameter of 20.5mm, and after adding the upper and lower...

Embodiment 2

[0030] (1) According to the mass percentage of metal powder Ti, Al, Nb, Zr, and Mo alloy, Nb: 4%, Zr: 2%, Mo: 2%, stearic acid: 1%, and the mass percentage of Al is 5%, 6%, 7%, and balance Ti to weigh three parts of mixed powder, the particle size of Ti, Nb, Mo, Zr powder is 70μm, the particle size of Al powder is 100μm, and the purity is 99.5%.

[0031] (2) Put the powder into the vacuum ball mill tank of the planetary ball mill, add stainless steel balls with a diameter of 6 mm according to the ball-to-material ratio of 5:1, vacuumize it to 5 Pa, and fill it with argon gas. Ball milling for 60 minutes and pausing for 60 minutes to intermittently ball mill and mix the powder for 5 hours, and then degrease the obtained mixed powder for 1 hour at a temperature of 400° C. under argon atmosphere.

[0032] (3) Put 10g of mixed powder into a high-strength graphite mold with an inner diameter of 10mm, and add the upper and lower indenters. The powder, the mold and the indenters are ...

Embodiment 3

[0036] (1) Metal powder Ti, Al, Nb, Zr, and Mo alloys with a particle size of 23, 50, and 75 μm were respectively prepared according to the mass percentage of Al: 4.5%, Nb: 2%, Zr: 1%, Mo: 1.2%, stearic acid : 5%, the remainder Ti weighs three parts of mixed powder, the purity is 99.5%.

[0037] (2) Put the powder into the vacuum ball mill tank of the planetary ball mill, add stainless steel balls with a diameter of 5mm according to the ball-to-material ratio of 2:1, vacuumize it to 5Pa, fill it with argon, and mill at a speed of 500r / min per ball Intermittent ball milling and mixing for 20 hours by pausing for 120 minutes for 60 minutes, and then degreasing the obtained mixed powder for 3 hours in an argon atmosphere at a temperature of 300°C.

[0038] (3) Put 30g of mixed powder into a high-strength graphite mold with an inner diameter of 25mm, pre-press at 60MPa, and put it into a spark plasma sintering equipment for sintering. Before sintering, the vacuum degree in the fu...

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