Method for the production of an element subject to wear, element subject to wear and temporary aggregation structure to produce said element subject to wear

A method for the production of an element subject to wear comprising a metal matrix and at least a core of hard material, wherein the method comprises:

• a first step in which a temporary aggregation structure is a spatial reticular structure that has open and intercommunicating pores, and is able to volatilize or be at least partially eliminated when subjected to heating, and in which the spatial reticular structure geometrically conforms in a coherent manner to the geometric conformation of the core;
• a second step in which, on the whole internal and external surface of said temporary aggregation structure, a liquid mixture of a binder with metal powders which contain hard elements or their precursors is uniformly distributed, and in which the temporary aggregation structure is immersed in the liquid mixture in an elastically compressed form and then released, such that the temporary aggregation structure is soaked in a compressed condition in a bath of the liquid mixture and is then released;
• a third step in which said temporary aggregation structure is deteriorated by means of a thermal action of controlled heating, so as to take at least part of said temporary aggregation structure to evaporation or partial melting, forming the core with a free volume therein, wherein the liquid mixture is consolidated according to the conformation of said temporary aggregation structure;
• a fourth step in which said core is disposed in a mold so as to only partly occupy the free volume of the mold;
• a fifth step in which a molten metal material is cast in said mold, which metal occupies the free volume and the volume that has been made free, both inside and outside said core, so as to anchor to the latter and thus form an element subject to wear having a single body, wherein prior to the casting of said molten metal material, both said core and said mold are at ambient temperature and wherein the metal powders undergo a chemical-physical reaction when contacting the molten metal material;
• and
• a sixth step in which said element is subjected to tempering.