Поршневой дисперсно-упрочненный композиционный материал на основе порошкового алюминиевого сплава

Abstract

The composition, structure, properties and technology for producing the dispersion strengthened composite material of Al–Si–Ni–Fe–Al2O3–C–O system for the high performance internal combustion engine pistons were proposed. The prepared material depending on the chemical composition has a tensile strength from 600 to 650 MPa at normal temperature with a relative elongation of 1,7 to 2,5 % and 180...195 MPa at a test temperature of 350 °C. The coefficient of linear thermal expansion in a temperature test range of 20...150 °C is equal to (16,8...17,4)·10-6 1/°C and at a temperature test range of 20...350 °C - (18,9...19,5)·10⁻⁶ 1/°C.