Abstract: The invention provides a nickel-free and cobalt-free, rust-proof austenitic steel, which meets the requirements, necessary in dentistry, concerning its corrosion resistance, its thermal expansion coefficient, its mechanical properties and its castability. For this purpose, the steel consists of, in % by mass, C: >0.2-0.8%, N: 0.3-1.3%, Si: ?2.0%, Mn: 14-30%, Cr: 17-27%, Mo: 0-6%, W: 0-6%, Nb: 0-6%, Ga: 0-6%, Ta 0-6%, the remainder being iron and unavoidable impurities. The content of impurities complies with the stipulations in DIN EN ISO 22674:2016-09 for dental materials. The steel composed has an austenitic structure, an offset yield strength Rp0.2 of at least 230 MPa, a percent elongation A of more than 5%, and a modulus of elasticity of at least 150 GPa.

Abstract: The invention relates to a steel material which allows for components to be formed with low residual stress via additive manufacturing without pre- or post-heating. The steel material consists of a steel with the following composition, in wt. %: C: 0.28-0.65%, Co: <10.0, Cr: 3.5-12.5%, optionally Mo: 0.5-12.5%, wherein the sum of the content of Cr and Mo is 4-16%, the Ni equivalent Ni_eq calculated according to the formula Ni_eq [%]=30% C+% Ni+0.5% Mn from the C-content % C, the Ni-content % Ni, the Mn-content % Mn fulfills the condition (1) 10%?Ni eq?20%, and alongside C, optionally respectively up to 9% Mn and up to 4.5% Ni are provided to fulfill condition (1), wherein the Cr equivalent Cr_eq calculated according to the formula Cr_eq [mass]=% Cr+% Mo+1.5% S+0.

Abstract: The invention relates to a metal powder intended for use in an additive manufacturing process, which consists of steel particles having an average diameter of 5-150 ?m and consisting of, in mass %, C: 0.15-1.0%, N: 0.15-1.0%, Si, 0.1-2.0%, Mn: 10-25%, Cr: 5-21%, Mo: 0.1-3.0%, Ni: ?5%, remainder of iron and unavoidable impurities. The metal powder has a flow rate determined in accordance with DIN EN ISO 4490 of less than 30 sec/50 g. Using a metal powder according to the invention, reliable high-load-bearing components can be produced by additive manufacturing. Accordingly, a metal powder according to the invention is particularly suitable for the manufacture of machine elements that are exposed to high loads and of medical components that are used in or on the human or animal body. The invention also provides a method which reliably allows components with optimised mechanical properties to be manufactured from metal powder according to the invention on the basis of an additive manufacturing process.

Abstract: A method for simply producing components suitable for use under high loads and risks of wear and which have a core portion which consists of a metal material and a wear-resistant layer on a peripheral surface of the core portion is disclosed. A core portion blank is provided and consists of the metal material whose dimension in a first spatial direction is greater than the desired finished dimension of the core and whose second dimension is smaller than the desired finished dimension is provided. A material that forms a wear-resistant layer in the component is applied to a peripheral surface of the core portion blank. The composite body is shaped to form the component. The component may then be optionally finished.

Abstract: The invention shows possibilities which allow simplified production of implants or prostheses, specifically of dental implants or prostheses, by applying subtractive processes. For this purpose, the invention proposes the use of a precipitation-hardening or solid-solution-strengthening, biocompatible cobalt-based alloy for the production of blanks. Such blanks are provided in the soft state. Subsequently, each component (implant or prosthesis) is produced from the soft blank by means of material-removing machining. Subsequently, a heat-treatment of the implant or prosthesis then takes place to adjust the hardness thereof by means of precipitation hardening or solid-solution formation.

Abstract: A steel material which has a minimised density, a good wear resistance and a concomitantly high service life with maximised resistance to extreme temperature changes and likewise optimised corrosion resistance. The steel material is produced by powder metallurgy and constituted as follows (in wt. %): C: 1.5-5.0%, Si: 0.3-2.0%, Mn: 0.3-2.0%, P: 0-<0.035%, S: 0-<0.35%, N: 0-<0.1%, Cr: 3.0-15.0%, Mo: 0.5-2.0%, V: 6.0-18.0%, optionally one or more elements from the group Nb, Ni, Co, and W, wherein the content of Ni, Co and W is respectively at most 1.0% and the content of Nb is at most 2.0%, residual iron and unavoidable impurities, wherein separately added hard material particles in contents of 2.5 to 30 wt. % are embedded in the steel matrix. From steel alloy powder alloyed in this way, a solid semifinished product is formed by a sintering process or an additive process, which undergoes a heat treatment and is then finished to form the respective component.

Abstract: A steel material produced via powder metallurgy having a matrix that includes (in wt %) C: 3.9-5.0%, Si: 0.3-2.0%, Mn: 0.3-2.0%, P: 0-<0.035%. S: 0-<0.35%, N: 0-<0.12%. Cr: 11.0-15.0%, Mo: 0.5-2.0%, V: 13.5-16.5%. optionally at lease one element from the group of Nb, Ni, Co, and W, wherein the content of each of Ni, Co, and W is at most 1.0% and the content of Nb is at most 2.0% with the remainder being iron and unavoidable impurities. Hard material panicles may be present in contents of up to 30 wt % in the matrix. A solid semi-finished product is formed by a sintering process or an additive process from a sled alloy powder having this composition that undergoes a heal treatment and is then finished to form component.

Abstract: The invention shows possibilities which allow simplified production of implants or prostheses, specifically of dental implants or prostheses, by applying subtractive processes. For this purpose, the invention proposes the use of a precipitation-hardening or solid-solution-strengthening, biocompatible cobalt-based alloy for the production of blanks. Such blanks are provided in the soft state. Subsequently, each component (implant or prosthesis) is produced from the soft blank by means of material-removing machining. Subsequently, a heat-treatment of the implant or prosthesis then takes place to adjust the hardness thereof by means of precipitation hardening or solid-solution formation.

Abstract: The invention sets out a method for simply producing components which are suitable for use under high loads and risks of wear and which have a core portion which consists of a metal material and a wear-resistant layer on a peripheral surface of the core portion.

Abstract: This invention relates to a steel having high wear resistance, a high degree of hardness, good corrosion resistance and/or low thermal conductivity. A hardness of a steel is at least 56 HRC in a hardened state. In order to obtain this hardness, in a microstructure of the steel in total at least 30% wt. of hard phases are present which in addition to TiC particles include further carbide particles, oxide particles or nitride particles. Content of the TiC particles in the steel is at least 20% wt. The hard-phase particles are embedded in a matrix which includes (in % wt.) 9.0-15.0% Cr, 5.0-9.0% Mo, 3.0-7.0% Ni, 6.0-11.0% Co, 0.3-1.5% Cu, 0.1-2.0% Ti, 0.1-2.0% Al, the remainder being iron and unavoidable impurities.