Formation and Properties of Steel-Iron Aluminide Composites

摘要

Iron and aluminum form a number of intermetallic phases, which have a quite high hardness and can be used for manufacturing parts of equipment operating under abrasive wear conditions. In addition, the advantage of applying iron-aluminum intermetallic alloys is a low cost and the lack of deficiency of the alloy components (aluminum, iron). However, all intermetallic compounds of this system have a high brittleness, and this fact restricts the region of applying the alloys based on iron-aluminum intermetallic phases. As an alternative to the parts made of the intermetallic alloys, steel-iron aluminide composites are proposed. The technology of manufacturing these composites is described. The studies performed in this work show that the proposed technology enables the formation of composite materials of adequate quality. The ultimate compressive strength of porous steel is similar to 145 MPa, and that of the composite material is higher than 435 MPa. The hardness of the intermetallic portions of the composite material is 385-400 HB, and the relative wear resistance of the composite material is similar to 6.