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Aluminium piston alloy

A piston alloy and chemical technology, applied in the field of aluminum piston alloy, can solve the problems of low qualified product rate and poor processing stability, and achieve the effects of grain refinement, strength improvement and uniform alloy structure.

Inactive Publication Date: 2015-05-27
LIUZHOU KAITONG MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem solved by the present invention is to provide an aluminum piston alloy to solve the problems of poor machining stability and low qualified product rate of existing aluminum pistons

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] An aluminum piston alloy, its chemical composition and mass percentage are: copper Cu: 1.0%, Mg: 0.4%, Si: 11%, Fe: 0.6%, Mn: 0.3%, Re: 0.8%, Sn: 0.001%, Pb: 0.001%, Zn: 0.01%, Cr: 0.01%, Ti: 0.06%, and the rest are Al and unavoidable impurities.

Embodiment 2

[0010] An aluminum piston alloy, characterized in that the chemical composition and mass percentage are: copper Cu: 1.3%, Mg: 0.8%, Si: 12%, Fe: 0.8%, Mn: 0.6%, Re: 1.2%, Sn: 0.003%, Pb: 0.004%, Zn: 0.1%, Cr: 0.07%, Ti: 0.12%, and the rest are Al and unavoidable impurities.

Embodiment 3

[0012] An aluminum piston alloy, characterized in that the chemical composition and mass percentage are: copper Cu: 1.5%, Mg: 1%, Si: 13%, Fe: 1%, Mn: 0.9%, Re: 1.4%, Sn: 0.005%, Pb: 0.005%, Zn: 0.15%, Cr: 0.09%, Ti: 0.18%, and the rest are Al and unavoidable impurities.

[0013] Example 1, Example 2, and Example 3 produced all have good hardness and tensile strength, and the tensile strength of the alloy finally obtained in the three examples is ≥275N / mm 2 , the hardness is HBS95~135, the macrostructure of concentrated pores and dispersed pores is 1~3, the microstructure is 1~3, the volume stability is ≤2%, and the finished aluminum piston has little deformation after being placed for a period of time , Improve the qualified product rate of the product.

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Abstract

The invention discloses an aluminium piston alloy, relating to the technical field of alloy material. The aluminium piston alloy comprises the following chemical components in percentage by mass: 1.0-1.5% of Cu, 0.4-1% of Mg, 11-13% of Si, 0.6-1% of Fe, 0.3-0.9% of Mn, 0.8-1.4% of Re, 0.001-0.005% of Sn, 0.001-0.005% of Pb, 0.01-0.15% of Zn, 0.01-0.09% of Cr, 0.06-0.18% of Ti and the balance of Al and inevitable impurities. Compared with the prior art, the aluminium piston alloy has the advantages that the strength and hardness are increased, the volume stability and cutting property are enhanced; after standing for a period of time, a finished aluminium piston hardly deforms, so that the yield of qualified products is increased.

Description

technical field [0001] The invention relates to the technical field of alloy materials, in particular to an aluminum piston alloy used for compressor pistons. Background technique [0002] The piston is one of the important parts of the compressor, especially the multi-stage compression compressor. In order to maintain the stability of the compressor, the weight of the pistons of each stage must be kept basically the same. Therefore, the material of the first-stage piston is usually aluminum alloy. High-grade aluminum alloys use aluminum as the basic component and contain elements such as silicon, copper, manganese, magnesium, and iron. The aluminum piston cast from the existing aluminum alloy meets the requirements of national standards in terms of hardness and tensile strength, but has certain limitations in terms of volume stability and machining stability. The finished aluminum piston deforms after being placed for a period of time Large, resulting in a low rate of qual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02
CPCC22C21/02
Inventor 朱东生
Owner LIUZHOU KAITONG MACHINERY
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