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Alloy material of centrifugal refrigerating compressor impeller and preparation method thereof

A technology of refrigeration compressors and centrifugal compressors, applied in the field of alloy materials, can solve the problems of affecting the moment of inertia of the rotor group, complex processing technology, and large specificity of alloy steel, etc., to prevent scattered shrinkage defects, simple process, and thermal crack resistance Tendency to strong effect

Active Publication Date: 2014-01-01
CHONGQING GENERAL IND (GRP) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The impeller material is generally formed by milling, welding or riveting of alloy steel forgings, and it can also be formed by milling and welding of aluminum alloy forgings. The disadvantages of the above two methods are: high cost, complicated processing technology, long production cycle, which is not conducive to mass production, especially for alloys. The specific gravity of steel is large, which affects the moment of inertia of the rotor group, and the long-term operation stability is poor

Method used

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  • Alloy material of centrifugal refrigerating compressor impeller and preparation method thereof
  • Alloy material of centrifugal refrigerating compressor impeller and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] A centrifugal refrigeration compressor impeller alloy material, the alloy material comprises the following components by weight: Si8%, Cu2%, Mg0.5%, Zr0.3%, Fe0.3%, Zn0.2%, Ti0. 1%, the balance of Al and impurity elements.

[0042] The preparation method of the centrifugal refrigeration compressor impeller alloy material comprises the following steps:

[0043] a. Alloy smelting:

[0044] Evenly coat talc and water glass in the crucible;

[0045] After heating up, add aluminum ingots preheated to 200°C, Al-Cu master alloys containing 50% copper and Al-Si master alloys containing 25% silicon, accounting for 60% of the total weight. ;

[0046] When the furnace temperature rises to 700 ℃, press the Mg preheated to 200 ℃, and the melting is completed; when the furnace temperature rises to 730 ℃, the refining agent preheated to 200 ℃ (SRWJ1 type hexachloroethane refining agent, Prepared according to 0.5% of the weight of the charge), press into the molten aluminum, stir s...

Embodiment 2

[0051] A centrifugal refrigeration compressor impeller alloy material, the alloy material comprises the following components by weight: Si10%, Cu1%, Mg0.2%, Zr0.2%, Fe0.2%, Zn0.1%, Ti0. 05%, the balance of Al and impurity elements.

[0052] The preparation method of the centrifugal refrigeration compressor impeller alloy material comprises the following steps:

[0053] a. Alloy smelting:

[0054] Evenly coat talc and water glass in the crucible;

[0055] After heating up, add aluminum ingots preheated to 300°C, Al-Cu master alloys containing 50% copper and Al-Si master alloys containing 25% silicon, accounting for 70% of the total weight. ;

[0056] When the furnace temperature rises to 720 ℃, press the Mg preheated to 300 ℃, and the melting is completed; when the furnace temperature rises to 750 ℃, the refining agent preheated to 300 ℃ (SRWJ1 type hexachloroethane refining agent, Prepared according to 0.5% of the weight of the charge), press into the molten aluminum, stir...

Embodiment 3

[0061] A centrifugal refrigeration compressor impeller alloy material, the alloy material includes the following components by weight percentage: Si9%, Cu1.5%, Mg0.3%, Zr0.25%, Fe0.25%, Zn0.15%, Ti0.1%, the balance of Al and impurity elements.

[0062] The preparation method of the impeller alloy material of the centrifugal refrigeration compressor comprises the following steps:

[0063] a. Alloy smelting:

[0064] Evenly coat talcum powder and water glass in the crucible;

[0065] After heating up, add aluminum ingots preheated to 250°C, Al-Cu master alloy containing 50% copper and Al-Si master alloy containing 25% silicon, accounting for 65% of the total weight, and add the remaining aluminum ingots after heating up to melt ;

[0066] When the furnace temperature rises to 710°C, press in the Mg preheated to 250°C, and the melting is completed; raise the furnace temperature to 740°C, and put the refining agent (SRWJ1 type hexachloroethane refining agent, Prepared accordin...

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Abstract

The invention discloses an alloy material of a centrifugal refrigerating compressor impeller. The alloy material comprises, by weight, 8-10% of Si, 1-2% of Cu, 0.2-0.5% of Mg, less than 0.3% of Zr, less than 0.3% of Fe, less than 0.2% of Zn, less than 0.1% of Ti, and the balance Al and impurity elements. The comprehensive performance of the alloy material of the centrifugal refrigerating compressor impeller is better than that of an existing domestic cast aluminum alloy, except for Al, Si, Cu and Mg, the content of other elements is controlled to be less than 1.5%, and the domestic cast aluminum alloy requires that the content of other elements is controlled to be within 1% (GB / T1173-1995). The alloy material of the centrifugal refrigerating compressor impeller is easy to smelt, convenient to operate, free of highly pure furnace charge, and capable of achieving good comprehensive mechanical performance indexes after common hot processing. The alloy material of the centrifugal refrigerating compressor impeller is simple in process, low in cost and suitable for batch production, and the cost of the alloy material of the centrifugal refrigerating compressor impeller is only one fourth of aluminum casting alloy.

Description

technical field [0001] The invention belongs to the technical field of alloy materials, and particularly relates to an alloy material for an impeller of a centrifugal refrigeration compressor and a preparation method thereof. Background technique [0002] The impeller is the heart of a centrifugal refrigeration compressor, a high-speed rotating part, and the design requires it to run at a speed of 270 m / s without any deformation. The impeller material is generally formed by milling, welding or riveting of alloy steel forgings, and can also be formed by milling and welding of aluminum alloy forgings. The disadvantages of the above two methods are: high cost, complicated processing technology, and long production cycle, which are not conducive to mass production, especially alloys. The specific gravity of steel is relatively large, which affects the moment of inertia of the rotor group, resulting in poor long-term operation stability. [0003] Under this background, it is nec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/04C22C1/03C22F1/043
Inventor 杨天帆陈红兵
Owner CHONGQING GENERAL IND (GRP) LTD
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