Patent ID: 7618502
Filing Date: 2009-11-17
Classification: C22C,C22F

Abstract:
1. A method of manufacturing a wear resistant aluminum alloy elongate body, comprising the steps of: obtaining a cast body by continuously casting an aluminum alloy such that secondary arm spacing of dendrite becomes at most 40 μm; obtaining a rolled body by hot rolling said cast body in a temperature range of at least 350° C. and at most 500° C. with reduction of processing of at least 40%; heat-treating said rolled body in a temperature range of at least 300° C. and at most 480° C. for at least 2 hours and at most 50 hours; and performing, after said step of heat treatment, dice-skinning process on a surface of said rolled body, wherein the aluminum alloy contains at least 7 mass % and at most 13 mass % of silicon, at least 0.001 mass % and at most 0.3 mass % of iron, at least 2.0 mass % and at most 5.0 mass % of copper, at least 0.3 mass % and at most 1.0 mass % of magnesium, at least 0.001 mass % and at most 0.3 mass % of manganese, at least 0.001 mass % and at most 0.3 mass % of chromium, at least 0.003 mass % and at most 0.03 mass % of strontium and at least 0.005 mass % and at most 0.05 mass % of titanium, and a remaining part of aluminum and an unavoidable impurity.