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A kind of aluminum alloy for piston and preparation method thereof

A technology of aluminum alloy and piston, which is applied in the field of aluminum alloy materials, can solve the problems of reducing the volume expansion coefficient and reducing the gap between cylinders, etc., and achieves the effects of improving oil leakage, reducing the actual gap, and good wear resistance

Active Publication Date: 2018-12-25
LONGKOU DACHUAN PISTON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the present invention provides an aluminum alloy formula and its preparation method, the purpose of which is to reduce the volume expansion coefficient and reduce the gap between the cylinders on the basis of ensuring the strength of the piston, so as to effectively solve the problems caused by the gap between the cylinders. Oil leakage, air leakage and power problems, making the overall use effect more effective

Method used

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  • A kind of aluminum alloy for piston and preparation method thereof
  • A kind of aluminum alloy for piston and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] An aluminum alloy for pistons, the composition according to mass percentage is: Mg: 0.9%; Cu: 0.2%; Sc: 0.06%; Ti: 0.06%; Mn: 0.09%; Cr: 0.05%; Zn: 0.02%; Ni : 2.6%; La: 0.02%; Ce: 0.01%; Si: 24%; the balance is Al.

[0027] After standard testing, the tensile strength is 482MPa.

Embodiment 2

[0029] An aluminum alloy for pistons, the composition according to mass percentage is: Mg: 1.2%; Cu: 0.5%; Sc: 0.06%; Ti: 0.05%; Mn: 0.09%; Cr: 0.07%; Zn: 0.19%; Ni : 3.5%; La: 0.04%; Ce: 0.04%; Si: 26%; Zr: 0.05%;

[0030] After standard testing, the tensile strength is 520MPa.

Embodiment 3

[0032] Mg: 1.1%; Cu: 0.4%; Sc: 0.04%; Ti: 0.04%; Mn: 0.07%; Cr: 0.05%; Zn: 0.17%; Ni: 2.9%; La: 0.03%; Ce: 0.04%; Si: 25%; Zr: 0.04%; the balance is Al.

[0033] After standard testing, the tensile strength is 532MPa.

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Abstract

The invention relates to aluminum alloy for a piston and a preparation method thereof. The aluminum alloy is composed of, by mass, 0.8-1.4% of Mg, 0.2-0.6% of Cu, 0.04-0.06% of Sc, 0.01-0.06% of Ti, 0.03-0.09% of Mn, 0.03-0.1% of Cr, 0.02-0.26% of Zn, 2.4-3.6% of Ni, 0.01-0.004% of La, 0.001-0.04% of Ce, 24-26% of Si and the balance Al. The aluminum alloy prepared through the method is low in thermal expansion coefficient, good in stability, high in strength, good in abrasion resistance and excellent in comprehensive practical property.

Description

technical field [0001] The invention relates to an aluminum alloy and a preparation method thereof, in particular to an aluminum alloy for a piston and a preparation method thereof, and belongs to the field of aluminum alloy materials. Background technique [0002] As one of the most important parts in the engine, the piston is called the heart of the engine. Its function is to withstand the gas pressure, and transmit it to the connecting rod through the piston pin to drive the crankshaft to rotate. When the engine is working, the piston is directly in contact with the high-temperature gas with an instantaneous temperature of 2200 degrees Celsius, and the temperature at the top reaches 300-400 degrees Celsius. Uneven; the top of the piston bears a lot of pressure during the power stroke, the gasoline engine can reach 4MPa-5MPa, the diesel engine can reach 8MPa-9MPa, or even higher; in addition, the reciprocating linear speed of the piston in the cylinder can reach 11m / s-16m / ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C1/02C22C1/06F02F3/00
CPCC22C1/026C22C1/06C22C21/02F02F3/0084F05C2201/903
Inventor 崔广澎姜浩解金顺王君
Owner LONGKOU DACHUAN PISTON
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