HEAT- AND WEAR-RESISTANT HIGH-STRENGTH ALUMINUM ALLOY POWDER AND MOLDED BODY OF SAID ALLOY POWDER AND THEIR MANUFACTURE

摘要

PURPOSE:To obtain high-Si Al alloy powder consisting of prescribed percentages of Si and Ni as essential components and the balance Al with inevitable impurities and having superior strength in the temp. range from ordinary temp. to a high temp. CONSTITUTION:Al alloy powder contg., by weight, 10.0-30.0% Si and 5.0- 15.0% Ni or further contg. 0.5-5.0% Cu and 0.2-3.0% Mg is prepared. The powder is rapidly dispersed and solidified by an atomizing method or a means for manufacturing fine powder by centrifugal force to obtain heat- and wear- resistant high-strength Al alloy powder. This Al alloy powder has Si grains of =15mum size and columnar crystals of an intermetallic compound contg. Ni grown under control, and it is novel alloy powder different from conventional high-Si Al alloy powder. An alloy having said structure can not be obtd. by a casting method.