A cubic boron nitride sintered material of the present disclosure includes 35 to 100 volume % of a cubic boron nitride grain and 0 to 65 volume % of a binder, wherein: a lattice constant of the cubic boron nitride grain is 3.6140 to 3.6161 , a silicon content in the cubic boron nitride grain is 0.02 mass % or less, and the binder material includes at least one selected from a group consisting of a compound and a solid solution of the compound, the compound consisting of at least one element selected from a group consisting of a group 4 element, a group 5 element, a group 6 element in the periodic table, aluminum, silicon, iron, cobalt and nickel, and at least one element selected from a group consisting of carbon, nitrogen, boron and oxygen.

Methods are disclosed for treating a base materials in a form of metallic powder made of super alloys based on Ni, Co, Fe or combinations thereof, or made of TiAl alloys, which treated powder can be used for additive manufacturing, such as for Selective Laser Melting of three-dimensional articles.

A cermet tool includes from 75-95 volume % of a hard phase and from 5-25 volume % of a binder phase. The hard phase has a first hard phase with a core portion of (Ti, Nb, Mo) (C, N) and a peripheral portion of (Ti, Nb, Mo, W) (C, N) or (Ti, Nb, Mo, W, Zr) (C, N), a second hard phase with both a core portion and a peripheral portion of (Ti, Nb, Mo, W) (C, N) or (Ti, Nb, Mo, W, Zr) (C, N), and a third hard phase of (Ti, Nb, Mo) (C, N). The ratio of Nbs/Nbi is from 0.8 to 1.2, where Nbs is a maximum Nb amount in a surface region and Nbi is an internal Nb amount in an internal region. The ratio of Ws/Wi is from 1.0 to 1.5, where Ws is a maximum W amount in the surface region and Wi is an internal W amount in the internal region. The area ratios A1, A2, and A3 of the respective hard phases are from 75 to 95 area % for A1, from 4 to 24 area % for A2, and from 1 to 24 area % for A3.

Provided is a cemented carbide comprising a plurality of tungsten carbide grains and a binder phase, wherein the cemented carbide comprises the tungsten carbide grains and the binder phase in a total of 89% by volume or more, the cemented carbide comprises 1.5% by volume or more and 23% by volume or less of the binder phase, the binder phase contains 40% by mass or more of cobalt, the binder phase further contains at least one first element selected from the group consisting of silicon, phosphorus, germanium, tin, rhenium, ruthenium, osmium, iridium, and platinum, the first element is not segregated in a first interface region between the tungsten carbide grains that are adjacent to each other, and the first element is not segregated in a second interface region between the tungsten carbide grain and binder phase that are adjacent to each other.

A ferrous alloy powder for additive manufacturing, obtained by atomization with a gas made of at least 95% in volume of nitrogen, the alloy including carbon up to 0.5 wt. %, titanium up to 11.0 wt. %, boron up to 5 wt. %, manganese up to 30 wt. %, aluminium up to 15 wt. %, silicon up to 1.5 wt. %, vanadium up to 0.5 wt. %, copper up to 2 wt. %, niobium up to 2 wt. %, the remainder being iron and residual elements, the powder including endogenous nitrides and/or carbonitrides of at least one element chosen among a group consisting of titanium, aluminium, boron, vanadium, silicon, and niobium, the nitrogen content of such ferrous alloy powder being above the solubility limit of nitrogen in such alloy, at the atomization temperature. A manufacturing method of such powder is also provided.

Provided is a cemented carbide suitable for use as a material in the manufacture of a punch for metal forming and in particular for the manufacture of metal beverage cans. The cemented carbide may include a hard phase that includes WC, a binder phase and a gamma phase. The gamma phase may include metal carbides in combination with metal nitrides or metal carbonitrides. A quotient of the average grain size of WC/the average grain size of the gamma phase may be in a range of from 0.5 to 1.5.

A method for additively manufacturing a sintered article from a powder composition having granules of cemented carbide or cermet includes the steps of additively manufacturing a bottom portion of the article by depositing a plurality of layers of powder composition, and adding binder to the entire surface of each layer of the bottom portion. The method further includes additively manufacturing a middle portion of the article by depositing a plurality of layers of powder composition, and adding binder to only the outer parts of each layer of the middle portion. The method further includes additively manufacturing a top portion of the article by depositing a plurality of layers of powder composition, and adding binder to the entire surface of each layer of the top portion, thereby producing a printed article, and sintering the printed article, wherein the porosity of the granules in the powder is 0-15 wt %.

Provided is a cemented carbide comprising a plurality of tungsten carbide grains and a binder phase, wherein the cemented carbide comprises the tungsten carbide grains and the binder phase in a total of 89% by volume or more, the cemented carbide comprises 1.5% by volume or more and 23% by volume or less of the binder phase, the binder phase contains 40% by mass or more of cobalt, the binder phase further contains at least one first element selected from the group consisting of silicon, phosphorus, germanium, tin, rhenium, ruthenium, osmium, iridium, and platinum, the first element is not segregated in a first interface region between the tungsten carbide grains that are adjacent to each other, and the first element is not segregated in a second interface region between the tungsten carbide grain and binder phase that are adjacent to each other.

A method for surface treatment of a metal material in a powder state is provided, the method including obtaining a powder formed from a plurality of particles of the metal material to be treated; and subjecting the powder to an ion implantation process by directing a beam of singly-charged or multi-charged ions towards an outer surface of the particles, the beam being produced by a source of singly-charged or multi-charged ions, whereby the particles have an overall spherical shape with a radius (R). There is also provided a material in a powder state formed from a plurality of particles having a ceramic outer layer and a metal core, the particles having an overall spherical shape.