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Turbo material of AlTi basal body pressure booster and preparation method thereof

A supercharger turbine and substrate technology, which is applied in the field of alloy materials, can solve the problems of slow response to sudden changes in throttle, failure of turbine blades flying cracks, heavy turbine weight, etc., and achieve the goal of solving hysteresis effect, low density, and improving responsiveness Effect

Inactive Publication Date: 2010-12-29
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the supercharger turbine made of K418 nickel-based superalloy has great limitations:
[0004] 2) At high temperature and high speed, the turbine blades often fail to fly
[0005] 3) The turbine is heavy and the responsiveness is not good. The inertia of the impeller responds slowly to the sudden change of the throttle, and the turbine has a "lag response".

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The aluminum-titanium base material of the present invention is prepared by a two-step process of mechanical alloying in the early stage and smelting in the later stage.

[0029] The preparation process of the mechanical alloying method in the early stage is as follows:

[0030] By weight ratio, particle size is 45 parts of aluminum powder of 200 orders (purity is 99.9%), particle size is 200 orders (purity is 99.0%) titanium powder 42.2 parts, particle size is chromium powder 8.2 of 200 orders (purity is 99.0%) 1.3 parts of 200 mesh manganese powders and 1.3 parts of manganese powder and a purity of 99.9% were mixed, packed into a ball mill jar, and utilized mechanical alloying (high-energy ball milling method), and ball milled in a ball mill jar for 20 hours. A Ti-Al binary solid solution is formed. The ball milling process parameters are: ball mill speed 320r / min. Choose 1Cr 18 Ni 9 Ti stainless steel tank, Al 2 o 3 The balls are milling media, the ball diamete...

Embodiment 2

[0036] It is basically the same as Example 1, the difference is:

[0037] Raw material ratio is different, see Table 1;

[0038] The speed of the ball mill is 360r / min, and the ball milling time in the previous preparation process is 24 hours;

[0039] After ball milling, the powder is left to stand for 40 minutes, and then annealed;

[0040] The annealing holding time is 90 minutes.

[0041] The density of this sample is 4.04g / cm 3 , Stiffness 169GPa, high temperature creep temperature 1010 ℃, maximum oxidation temperature 885, room temperature plasticity 6.2%, working temperature plasticity 14.6%, tensile strength 610MPa, working temperature tensile strength 560MPa. Compared with the K418 alloy, the weight of the new material is reduced by 30%, and the high-temperature oxidation resistance and impact toughness are increased by 1.4% and 1.3% respectively. The material has excellent oxidation resistance, and its high-temperature resistance is better than that of conventiona...

Embodiment 3

[0043] It is basically the same as Example 1, the difference is:

[0044] The ratio of raw materials is different, see Table 1.

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Abstract

The invention discloses an AlTi matrix supercharger turbine material which is an AlTi matrix material used for the turbine of the supercharger and a manufacturing method thereof. The method mainly comprises the following steps: titanium powder, aluminum powder, chromium powder and manganese powder are mixed in proportion for ball-grinding, then the mixture is annealed, misch metal is added for the ball-grinding, and the mixture is cold pressed and hotpressed in vacuum to obtain the material. The mixture ratio for raw materials thereof is as follows (by weight percent): 5.0-8.0% of chromium, 0.80-1.30% of manganese, 35-45% of titanium; 2.0-3.0% of misch metal, less than 1.00% of total amount of iron, copper and zincum in impurities, and the balance of aluminum. The material is characterized by light weight, high strength and excellent plastic toughness; the turbine of the supercharger manufactured by the material has great responsivity and is not liable to deformation and cracking failure under condition of high temperature, high pressure and high speed.

Description

technical field [0001] The invention relates to an alloy material, in particular to an AlTi matrix material used for a turbocharger turbine, and also relates to a preparation method of the material. Background technique [0002] The turbocharger is installed on the intake and exhaust manifold of the engine, and it is under the working conditions of high temperature, high pressure and high speed, so it has high requirements on the material forming technology and processing technology of the manufacturing. The material is required to have good high-temperature mechanical properties, high high-temperature enduring strength limit and good fatigue and creep resistance. The turbocharger turbine is a very critical and important part of the turbocharger. With the development of supercharger technology, the turbine material is constantly being updated. In the past, the material commonly used in diesel turbocharger turbines was 20Cr3MoWV(A). However, this material is only suitable fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/14C22C21/00C22C1/04
Inventor 王守仁杨学锋李萍
Owner UNIV OF JINAN
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