A high niobium titanium aluminum base supercharger turbine and its manufacturing method

A technology based on supercharger and high niobium titanium aluminum, applied in turbines, machines/engines, mechanical equipment, etc., can solve the problems of complex process and large specific gravity, and achieve improved responsiveness, high elastic modulus, and increased melting temperature. Effect

Inactive Publication Date: 2017-05-03
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of high specific gravity and complicated process in the prior art, the present invention provides a high-niobium titanium-aluminum-based supercharger turbine and a manufacturing method thereof. The supercharger turbine adopts a high-niobium titanium-aluminum-based alloy material. Not only the bulk density is small, but also has good high temperature strength and oxidation resistance, which can effectively reduce the moment of inertia of the turbine and improve the response speed of the turbocharger

Method used

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  • A high niobium titanium aluminum base supercharger turbine and its manufacturing method
  • A high niobium titanium aluminum base supercharger turbine and its manufacturing method
  • A high niobium titanium aluminum base supercharger turbine and its manufacturing method

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Embodiment 1

[0040] ① Ingredients: Weigh 46.5 parts of Ti powder, 45 parts of Al powder, 8 parts of Nb powder, 0.2 part of B powder, 0.2 part of W powder and 0.1 part of Y powder according to atomic percentage; put the raw material powder into the mixing tank for mixing and grinding to obtain a mixed powder, the particle size of the raw powder is 1 μm.

[0041] ②Kneading: Put the adhesive into the mixer first, and after it melts, put the mixed powder powder prepared in step ① into the mixer. Mixed for 2 hours under working conditions, the mixed material was prepared by a granulator into granular feed suitable for injection, the content of binder in the feed was 11.5%, and the components of the binder were carnauba 50% wax, 30% high-density polyethylene, 12% paraffin, 5% polypropylene, 3% stearic acid.

[0042] The shape of the material used in injection molding is generally cylindrical or square. As a specific implementation, the material used in this embodiment is cylindrical.

[0043] ...

Embodiment 2

[0054] It is basically the same as Example 1, the difference is:

[0055] Ingredients: The ratio of each component constituting the raw material is different, see Table 1, and the particle size of the raw material powder is 10 μm.

[0056] Mixing: the mass fraction of the binder in the prepared feed is 12%.

[0057] Preparation of water-soluble salt core: the additive is alumina particles, and its mass fraction is 3%.

[0058] Injection molding: During the injection process, the injection pressure is 120MPa, the injection temperature is 180°C, the holding pressure is 70MPa, the holding time is 2s, and the cooling time is 15s.

[0059] Sintering: The degreased green body is sintered under the condition of argon atmosphere, the sintering temperature is 1450°C, the sintering time is 180min, and the pressure of argon gas is 0.5MPa.

[0060] The performance index of the turbocharger turbine after sintering is shown in Table 2.

Embodiment 3

[0062] It is basically the same as Example 1, the difference is:

[0063] Ingredients: The ratio of each component constituting the raw material is different, see Table 1, and the particle size of the raw material powder is 15 μm.

[0064] Mixing: the mass fraction of the binder in the prepared feed is 10%.

[0065] Preparation of water-soluble salt core: the additive is alumina particles, and its mass fraction is 8%.

[0066] Injection molding: During the injection process, the injection pressure is 100MPa, the injection temperature is 80°C, the holding pressure is 60MPa, the holding time is 5s, and the cooling time is 20s.

[0067] Sintering: The degreased green body is sintered under the condition of argon atmosphere, the sintering temperature is 1500°C, the sintering time is 60min, and the pressure of argon gas is 5MPa.

[0068] The performance index of the turbocharger turbine after sintering is shown in Table 2.

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Abstract

The invention relates to the technical field of manufacturing of a supercharger turbine, in particular to material of the supercharger turbine and a manufacturing method adopting the material. The supercharger turbine is composed of the high-niobium titanium aluminum-base alloy material, and the material is composed of, by atomic percent, 5-8% of niobium, 40-50% of aluminum, 0-0.2% of boron, 0-0.2% of tungsten, 0-0.2% of yttrium, 0-3% of chromium, 0-3% of molybdenum and the balance titanium. By adopting the high-niobium titanium aluminum-base alloy material, the supercharger turbine is good in responsiveness and small in deformation at high temperature, high pressure or high speed and hardly generates carbon deposits. The invention further discloses the manufacturing method of the supercharger turbine. The manufacturing method mainly comprises the steps of mixing, water-soluble salt core preparing, injection molding, core removing, degreasing and sintering. Through the method, the near-net formed turbine can be obtained, the removing time of a water-soluble salt core is short, pollution is avoided, the environmental friendliness is high, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of turbocharger turbine manufacturing, in particular to a turbocharger turbine manufacturing method using a high-niobium-titanium-aluminum-based alloy as a material and using a metal powder injection molding process. Background technique [0002] The turbocharger uses the inertial momentum of the exhaust gas discharged from the engine to drive the turbine in the turbine chamber, and the turbine drives the coaxial impeller, which presses the air sent by the air filter pipe to pressurize it into the cylinder. Increased air pressure and density can burn more fuel, and correspondingly increasing the amount of fuel and adjusting the engine speed can increase the output power of the engine. [0003] The turbocharger turbine is under the working conditions of high temperature, high pressure and high speed, the working environment is harsh, and the working conditions are relatively harsh, so the requirements for man...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22C21/00C22C30/00B22F1/00B22F3/22B22F5/00F01D5/02
CPCB22F1/0003B22F3/225B22F5/009C22C14/00C22C21/00C22C30/00F01D5/02
Inventor 孙志平张年龙王致明
Owner QILU UNIV OF TECH
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