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Material for preparing turbine rotor of pressurizer and method for preparing turbine rotor by material

A technology of turbine rotor and supercharger, applied in mechanical equipment, machine/engine, blade supporting element, etc., can solve the problems of unstable performance in service environment, unstable performance, low service life, etc., to shorten the response time, The effect of low density and high hardness

Inactive Publication Date: 2012-11-07
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The inherent brittleness and harsh service environment of silicon nitride ceramic turbine rotors lead to unstable performance, flying blades, and low service life
In the past, the raw material formula of silicon nitride ceramic turbine rotors was only a mixture of different ceramic components. Such ceramic turbine rotors were extremely unstable due to their brittleness.

Method used

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  • Material for preparing turbine rotor of pressurizer and method for preparing turbine rotor by material
  • Material for preparing turbine rotor of pressurizer and method for preparing turbine rotor by material
  • Material for preparing turbine rotor of pressurizer and method for preparing turbine rotor by material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A material for preparing a supercharger ceramic turbine rotor, comprising the following components by weight: 85 parts of silicon nitride powder, nitrogen

[0033] 5 parts of boron nanotube powder, 2 parts of metal aluminum powder, 3 parts of silicon powder, and 5 parts of zirconia powder.

[0034] A method for preparing a turbine rotor from said material, comprising the steps of:

[0035] (1) Raw material preparation: Weigh 85 parts of silicon nitride powder, 5 parts of boron nitride nanotube powder, 2 parts of metal aluminum powder, 3 parts of silicon powder and 5 parts of zirconia powder in parts by weight to form the raw material.

[0036] (2) Paste preparation: Add the raw materials obtained in step (1) and silica sol in a ratio of 1:1.5 by weight to a liftable forced mixer for stirring and mixing. The stirring speed is 60 r / min. After stirring for 50 minutes, add Diyttrium trioxide sintering aid with 3% weight of raw material, and distilled water with 14% weight ...

Embodiment 2

[0044] A material for preparing a supercharger ceramic turbine rotor, comprising the following components by weight: 87 parts of silicon nitride powder, nitrogen

[0045] 3 parts of boron nanotube powder, 3 parts of metal aluminum powder, 4 parts of silicon powder, and 3 parts of zirconia powder.

[0046] A method for preparing a turbine rotor from said material, comprising the steps of:

[0047] (1) Raw material preparation: Weigh 87 parts of silicon nitride powder, 3 parts of boron nitride nanotube powder, 3 parts of metal aluminum powder, 4 parts of silicon powder and 3 parts of zirconia powder in parts by weight to form the raw material.

[0048] (2) Paste preparation: Add the raw materials obtained in step (1) and silica sol in a ratio of 1:1.5 by weight to a liftable forced mixer for stirring and mixing. The stirring speed is 55r / min. After stirring for 60 minutes, add the raw materials 2% by weight of diyttrium trioxide sintering aid, at the same time add 13% by weight...

Embodiment 3

[0056] A material for preparing a supercharger ceramic turbine rotor, comprising the following components by weight: 90 parts of silicon nitride powder, nitrogen

[0057] 1 part of boron nanotube powder, 2 parts of metal aluminum powder, 2 parts of silicon powder, and 5 parts of zirconia powder.

[0058] A method for preparing a turbine rotor from said material, comprising the steps of:

[0059] (1) Raw material preparation: Weigh 90 parts of silicon nitride powder, 1 part of boron nitride nanotube powder, 2 parts of metallic aluminum powder, 2 parts of silicon powder and 5 parts of zirconia powder in parts by weight to form the raw material.

[0060] (2) Paste preparation: Add the raw materials obtained in step (1) and silica sol in a ratio of 1:1.5 by weight to a liftable forced mixer for stirring and mixing. The stirring speed is 65r / min. After stirring for 55 minutes, add the raw materials 4% by weight of diyttrium trioxide sintering aid, at the same time add 15% by weigh...

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Abstract

The invention belongs to the technical field of manufacturing of turbine rotor of a pressurizer, in particular to a material for preparing a turbine rotor of the pressurizer and a method for preparing the turbine rotor by the material. The material for preparing the turbine rotor of the pressurizer comprises the components in parts by weight as follows: 85-90 parts of silicon nitride powder, 1-8 parts of boron nitride nanotube powder, 2-4 parts of aluminite powder, 2-4 parts of silicon powder and 3-5 parts of zirconium oxide powder. The method for preparing the turbine rotor by the material comprises the steps of: (1) preparing a raw material; (2) preparing a paste material; (3) injection moulding; (4) setting and drying; and (5) gas pressure sintering of mould constraint. The turbine rotor of the pressurizer prepared by the material is light in weight, good in toughness, high in strength, low in specific gravity and good in proportionality, and small in lag proportionality, small in deformation, small in accumulated carbon and long in service life under supernormal work conditions such as high temperature, high pressure and high speed. Meanwhile, the method for preparing the turbine rotor by the material is simple in steps, convenient to operate and is beneficial for industrialized production in a large scale.

Description

technical field [0001] The invention belongs to the technical field of manufacturing supercharger turbine rotors, and in particular relates to a method for preparing supercharger ceramic turbine rotors. [0002] A material for a rotor and a method for preparing a turbine rotor from the material. Background technique [0003] The use of exhaust gas turbocharging has become one of the most important means for gasoline engines and diesel engines to improve power, economy and emission characteristics in the world. The turbo rotor supercharger uses the high-temperature exhaust gas energy discharged by the engine to drive the exhaust gas turbine in the turbine chamber to rotate at a high speed, thereby driving the compressor coaxial with the turbine to achieve supercharging, thereby improving the performance of the engine. Traditional turbine rotor materials generally use nickel-based alloys. However, under high-temperature, high-pressure, and high-speed environmental conditions,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/78C04B35/584C04B35/622F01D5/02
Inventor 王守仁于航海王英姿乔阳宋令惠杨丽颖
Owner UNIV OF JINAN
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