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Compressor impeller cast from al alloy and method for producing same

A technology of compressor impeller and manufacturing method, which is applied in the direction of manufacturing tools, casting molding equipment, casting molds, etc., to achieve the effect of long-term stable heat resistance strength

Inactive Publication Date: 2016-11-30
FURUKAWA SKY ALUMINUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, in single-alloy casting of the above-mentioned Al-Cu-Mg-based alloy, long-term stable use at high temperatures around 200°C has become a problem as turbochargers are increasingly rotated at higher speeds.
In addition, in order to ensure stable productivity, there is still the problem of improving casting yield

Method used

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  • Compressor impeller cast from al alloy and method for producing same
  • Compressor impeller cast from al alloy and method for producing same
  • Compressor impeller cast from al alloy and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0091] Hereinafter, the present invention will be described in more detail through examples.

no. 1 example ( example 1

[0092] First Embodiment (Invention Examples 1-7 and Comparative Examples 1-20)

[0093] The Al alloy having the composition shown in the composition column of Table 1 was subjected to a usual melt treatment to be melted, and the melt was subjected to a melt preparation step of adjusting the temperature shown in Table 1. In the melt preparation step, 150 kg of an Al alloy having a composition shown in the composition column of Table 1 was melted to obtain a melt. Afterwards, use a rotary gas blowing device at a rotor speed of 400rpm and a gas flow rate of 2.5Nm 3 Under the condition of per hour, argon gas is blown into the melt for 30 minutes to carry out degassing treatment. Afterwards, the whole melt was left to stand still for 1 hour to remove slag. After deslagging, a micronization agent was added to the melt during the melt preparation process so that the amounts of Ti and B components shown in the column of the composition amount of the micronization agent after prepara...

no. 2 example

[0130] Second Embodiment (Invention Examples 8-18 and Comparative Examples 21-26)

[0131] The Al alloy with the composition shown in the composition column of Table 3 was subjected to a usual melt treatment to be melted, and the melt was subjected to a melt preparation step of adjusting the temperature shown in Table 3. In the melt preparation step, 150 kg of an Al alloy having a composition shown in the composition column of Table 3 was melted to obtain a melt. Afterwards, use a rotary gas blowing device at a rotor speed of 400rpm and a gas flow rate of 2.5Nm 3 Under the condition of per hour, argon gas was blown into the melt for 20 minutes to carry out degassing treatment. Afterwards, the entire melt was left to stand still for 1 hour to remove slag. After deslagging, the micronization agent containing Ti and B shown in the column of the component amount of the micronization agent after preparing the melt in Table 3 was added to the melt.

[0132] [table 3]

[0133] ...

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Abstract

The present invention provides: a compressor impeller that is cast from an aluminum alloy, has superior production characteristics, and exhibits stable high-temperature strength when used at temperatures around 200 DEG C; and a method for producing same. The compressor impeller that is cast from an Al alloy is provided with a boss section, a plurality of vane sections, and a disc section; the boss section, the plurality of vane sections, and the disc section excluding the end section comprise an Al alloy comprising a predetermined metal composition; and at the end section of the disc section, there are at least 10,000 / mm<2> of intermetallic compounds having a circle-equivalent diameter of 1-6 [mu]m, and there are no greater than 500 / mm<2> of intermetallic compounds having a circle-equivalent diameter exceeding 6 [mu]m.

Description

technical field [0001] The present invention relates to a compressor impeller made of an aluminum alloy casting used in a turbocharger of an internal combustion engine of an automobile or a ship, and a manufacturing method thereof. Background technique [0002] A turbocharger used in an internal combustion engine for an automobile or a ship is provided with a compressor wheel that compresses air at high speed and supplies it to the internal combustion engine. The impeller of the compressor reaches a high temperature of about 150°C during high-speed rotation, and high stress such as torsional stress from the rotating shaft or centrifugal force occurs near the center of rotation, especially in the disk portion. [0003] The compressor wheel is formed from various materials according to the required performance of the turbocharger. For large-scale applications such as ships, impellers cut into impeller shapes from ordinary hot-forged aluminum alloy materials are used. In rela...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/12B22C9/02B22C9/22B22D18/04B22D21/04C22F1/057F02B39/00F04D29/30
CPCB22C9/02B22D18/04B22D21/04B22C9/28B22D15/005B22D18/06F04D29/023F04D29/284F05D2300/173C22F1/057B22D17/203B22D21/007B22D25/02C22C21/16
Inventor 久保贵司高桥功一牛山俊男石川宣仁
Owner FURUKAWA SKY ALUMINUM CORP
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