Heat resistant aluminum alloy powder, heat resistant aluminum alloy and heat and wear resistant aluminum alloy-based composite material

摘要

Disclosed are heat resistant aluminum alloy powder and alloy including Ni in an amount of from 5.7 to 20% by weight, Si in an amount of from 6.0 to 25% by weight, at least one of Fe in an amount of from 0.6 to 8.0% by weight and Cu in an amount of from 0.6 to 5.0% by weight, and at least one of B in a form of the simple substance in an amount of from 0.05 to 2.0% by weight (or from 0.05 to 10% by weight for the alloy) and graphite particles (especially for the alloy) in an amount of from 0.1 to 10% by weight. The alloy powder and alloy are not only superb in the tensile strength at room temperature and high temperatures but also superior in the sliding characteristic, they can be further upgraded in the wear resistance and the fretting fatigue resistance by dispersing at least one of nitride particles, boride particles, oxide particles and carbide particles in an amount of from 0.5 to 10% by weight with respect to the whole composite material including the matrix taken as 100% by weight in the matrix, thereby resulting in a heat and wear resistant aluminum alloy-based composite materials. The alloy powder, alloy and composite material are satisfactorily applicable to the component parts of the recent automobile engines which should be light-weight and produce a high output.