Aluminum alloy molded body and production method therefor

Abstract

The purpose of the present invention is to provide an aluminum alloy molded body that has excellent thermal stability and does not contain a rare earth element, and to provide a production method for the same. More specifically, the present invention provides an aluminum alloy molded body that has a high degree of hardness even at 200° C., and a method which enables efficient production of the same even if the aluminum alloy molded body has a complicated shape. An aluminum alloy laminated molded body according to the present invention, which is molded using an additive manufacturing method, is characterized in that: the raw material therefor is an aluminum alloy material containing 2-10 mass % of a transition metal element that forms a eutectic crystal with Al, with the remainder being Al and unavoidable impurities; the relative density thereof is at least 98.5%; a metal structure is composed of a primary crystal α (Al) and a compound composed of Al and the transition metal element; and the spacing of the compound in a region excluding the boundary of a melt pool is no more than 200 nm.

Dependencies are inferred from the claim text.