Abstract: A high heat resisting and high abrasion resisting aluminum alloy and aluminum alloy powder have superior toughness, abrasion resistance, high temperature strength, and creep resistance and are useful to form engine parts for automobiles, airplanes, etc. The high heat resisting and high abrasion resisting aluminum alloy comprises 2 to 15 wt % of Ni, 0.2 to 15 wt % of Si, 0.6 to 8.0 wt % of Fe, one or two of 0.6 to 5.0 wt % of Cu and 0.5 to 3 wt % of Mg, the total amount of Cu and Mg being equal to or less than 6 wt %, one or two of 0.3 to 3 wt % of Zr and 0.3 to 3 wt % of Mo, the total amount of Zr and Mo being equal to or less than 4 wt %, 0.05 to 10 wt % of B, and the balance of Al and unavoidable impurities, and is produced by powder metallurgy.

Abstract: 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.

Abstract: An aluminum alloy consists essentially of 90 to 99.5% by weight of matrix and 0.5 to 10% by weight of a dispersant dispersed within the matrix. The matrix comprises 10 to 25% by weight of Si, 5 to 20% by weight of Ni, 1 to 5% by weight of Cu and the rest of Al and impurity elements. The dispersant is at least one selected from the group consisting of 0.5 to 10% of nitride, boride, carbide and oxide. The aluminum alloy shows excellent tensile strength and wear resistance.

Abstract: Disclosed are heat resistant aluminum alloy powders and alloys including Ni, Si, either at least one of Fe and Zr or at least one of Zr and Ti. For instance, the alloy powders or alloys consist essentially of Ni in an amount of from 5.7 to 20% by weight, Si in an amount of from 0.2 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 the balance of Al. The alloy powders or alloys are optimum for a matrix of heat and wear resistant aluminum alloy-based composite materials including at least one of nitride particles and boride particles in an amount of 0. 5 to 10% by weight with respect to the whole composite material taken as 100% by weight. The alloy powders, alloys and composite materials are satisfactory applicable to the component parts of the recent automobile engines which should produce a high output.

Abstract: A method of forming an outerrace of a universal joint having cross grooves, in which its cylindrical portion is formed in its inner face with cross grooves by a plastic working process such as a forging process, an outerrace of a universal joint, which has its cylindrical and shaft portions integrally molded into a form having generally an outerrace shape from a single steel material and which is formed by forging thereof from above and all sides, and a process and an apparatus for producing the outerrace.