Wear-resistant sintered aluminum alloy with high strength and manufacturing method thereof

Abstract

Disclosed is a wear-resistant sintered aluminum alloy with high strength and a manufacturing method thereof. The sintered aluminum alloy contains, by mass: 3.0-10% zinc; 0.5-5.0% magnesium; 0.5-5.0% copper; 0.1-10% hard particles; impurities; and aluminum. The metallographic structure has an aluminum alloy matrix in which the hard particles dispersed; and an intermetallic compound phase being dispersedly precipitated in the aluminum alloy matrix. Using an aluminum powder, a hard particles powder and other powders, a compact is formed and sintered at 580-610 degrees C., then cooled and subjected to heat treatment at a temperature of 460-490 degrees C., including water-quenching and aging at 110-200 degrees C.

Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a wear-resistant sintered aluminum alloy with high strength that is suitable for various kinds of sliding parts such as connecting rods, pistons and the like, and a method of manufacturing thereof. More particularly, the invention concerns a wear-resistant sintered aluminum alloy with high strength that is improved in tensile strength and elongation as well as wear resistance, and a manufacturing method thereof.

[0003] 2. Related Art

[0004] Regarding the aluminum sintered parts manufactured with the use of a powder-metallurgical method, there has been an increasing demand in recent years, since they are not only light in weight but also possible to possess preferable properties that cannot be obtained with cast materials, such as strength, wear resistance and the like. Specifically, in a case of wrought alloy containing a large amount of silicon, only alloy having metallographic stru...