Various embodiments of a hammermill system, hammer, and methods are disclosed. A hammermill hammer comprises a metal composite comprising a plurality of inserts and a body portion disposed between each of the plurality of inserts. The composition of the plurality of inserts is different than composition of the body portion. The material of the plurality of inserts has a greater abrasion resistance than the material of the body portion and the material of the body portion has a greater impact resistance than the material of the inserts. The hammers produced have improved wear resistance and longer useful life compared to conventional hammermill hammers.

A method of producing a composite product having cemented carbide tiles embedded in a metal surface thereof, a cemented carbide tile suitable for use in the method and a composite product including such cemented carbide tiles is provided. A mould for casting the product is prepared. Cemented carbide tiles having through holes or recesses are placed at desired surfaces of the mould and secured to the desired surfaces of the mould by fastening elements, such as nails or pins, such that at least part of an elongated body of each respective fastening element protrudse out from respective openings of each through hole or recess facing the mould surface and into the material of the mould to secure the respective cemented carbide tiles in place. Molten metal is poured into the mould to cast the composite product, the casting of which is removed after solidification.

Articles comprising at least a portion of an earth-boring tool include at least one insert and a solidified eutectic or near-eutectic composition including a metal phase and a hard material phase. Other articles include a solidified eutectic or near-eutectic composition including a metal phase, a hard material phase and a coating material in contact with the solidified eutectic or near-eutectic composition.

Articles comprising at least a portion of an earth-boring tool include at least one insert and a solidified eutectic or near-eutectic composition including a metal phase and a hard material phase. Other articles include a solidified eutectic or near-eutectic composition including a metal phase, a hard material phase and a coating material in contact with the solidified eutectic or near-eutectic composition.

A method for manufacturing a ground engaging component is disclosed. The method includes providing a mixture of compacted powders including carbon, titanium, and a first alloy, the first alloy having a first composition and heating the mixture to a temperature and for a duration sufficient to combine the mixture to form an insert having a desired shape. The method further includes locating the insert in a desired position in a mold and casting a second alloy having a second composition into the mold, the second alloy forming a ground engaging component with the insert bonded therein.

The present disclosure provides an earth-boring drill bit including a bit head and a shank. The shank includes a blank and a mandrel. The mandrel is concurrently formed by and secured to the blank by additive manufacturing. The mandrel includes a first region including a first alloy and a second region including a second alloy. The first alloy and the second alloy have a different modulus of elasticity, yield strength, resilience, ductility, hardness, fracture toughness, wear resistance, corrosion resistance, or erosion resistance. The disclosure also provides a mandrel wherein the second region comprises a sensor region or a fluid passageway having a geometry that is not obtainable in a mandrel that is cast, machined, or both. The disclosure additionally provides method of manufacturing such bits and mandrels.

A crushing or wear part includes an un-reinforced steel alloy body and at least one in-situ cast localized composite wear zone disposed in the steel alloy body formed of metal carbide or metal boride particles selected from TiC, ZrC, WC, NbC, TaC, TiB.sub.2, and ZrB.sub.2 distributed in a steel alloy matrix. The at least one in-situ cast localized composite wear zone has a Vickers Hardness that is at least 700 and at least 50% greater than a Vickers Hardness of the un-reinforced steel alloy body. A bonding region that is located between the in-situ cast localized composite wear zone and the steel alloy body is continuous and free of cracks, and the in-situ cast localized composite wear zone is unfragmented.

A crushing or wear part includes an un-reinforced steel alloy body and at least one in-situ cast localized composite wear zone disposed in the steel alloy body formed of metal carbide or metal boride particles selected from TiC, ZrC, WC, NbC, TaC, TiB.sub.2, and ZrB.sub.2 distributed in a steel alloy matrix. The at least one in-situ cast localized composite wear zone has a Vickers Hardness that is at least 700 and at least 50% greater than a Vickers Hardness of the un-reinforced steel alloy body. A bonding region that is located between the in-situ cast localized composite wear zone and the steel alloy body is continuous and free of cracks, and the in-situ cast localized composite wear zone is unfragmented.

Metal composites, tooling and methods of additively manufacturing these are disclosed. Metal objects and structures as provided herein are additively manufactured from metal having an infill pattern infiltrated with a second metal. Also provided herein are methods of forming such objects and structures. Methods include additively manufacturing a metal structure having an interior printed using an infill. Steps can further include infiltrating the printed infill of the structure with a liquid metal thereby forming a bi-metal composite.

A construction machinery bucket part includes a body including a low alloy cast iron, and a wear resistant tip cast bonded to an end portion of the body and including a white cast iron. The construction machinery bucket part includes dissimilar materials, and has improved economic feasibility and wear resistance.