Disclosed herein, in certain embodiments, are composite materials, methods, tools and abrasive materials comprising a tungsten-based metal composition, a tungsten carbide, and an alloy. In some cases, the composite materials or matrix are resistant to oxidation.

An RIB-based permanent magnet material, a preparation method thereof, and an application thereof. The RIB-based permanent magnet material comprises the following components: R′: 29.5 to 33.5 wt. %, wherein R′ comprises Pr, and the content of Pr is ≥8.85 wt. %; C:0.106 to 0.26 wt. %; O: ≤0.07 wt. %; X: 0 to 5.0 wt. %, wherein X is one or more of Cu, Al, Ga, Co, Zr, Ti, Nb and Mn; B:0.90 to 1.2 wt. %; and Fe:61.4 to 69.5 wt. %. The RIB-based permanent magnet material can improve the performance of a permanent magnet material without employing heavy rare earths. There is no need to control the content of carbon introduced in the process, and the magnet exhibits excellent performance even with a high carbon content.

An RIB-based permanent magnet material, a preparation method thereof, and an application thereof. The RIB-based permanent magnet material comprises the following components: R′: 29.5 to 33.5 wt. %, wherein R′ comprises Pr, and the content of Pr is ≥8.85 wt. %; C:0.106 to 0.26 wt. %; O: ≤0.07 wt. %; X: 0 to 5.0 wt. %, wherein X is one or more of Cu, Al, Ga, Co, Zr, Ti, Nb and Mn; B:0.90 to 1.2 wt. %; and Fe:61.4 to 69.5 wt. %. The RIB-based permanent magnet material can improve the performance of a permanent magnet material without employing heavy rare earths. There is no need to control the content of carbon introduced in the process, and the magnet exhibits excellent performance even with a high carbon content.

The present invention belongs to the field of medical accessories, more precisely to the field of accessories for protection against outer conditions such as impacts, high or low temperature and similar conditions that can harm a human being. The invention relates to a personalized accessory for protection of a body part, which comprises a protective element, which fits to the shape of the excrescence, a scar or a wound, and an adjustable part to which the protective part is attached, glued, sewed or inserted, wherein the adjustable part can be stretched or in any other way adjusted to the particular body part, which has to be protected. The said accessory is manufactured in the following way: first the body part with the injury is scanned or measured in order to obtain a 3D model of the scanned or measured body part. Then the protective element is made using a 3D printer or thermoforming with an adjustable mould, wherein the finished protective element is then attached to the adjustable part.

Metallic alloys and methods for the preparation of free-standing metallic materials in a layerwise manner. The resulting layerwise construction provides a metallic skeleton of selected porosity which may be infiltrated with a second metal to provide a free-standing material that has a volume loss of less than or equal to 130 mm.sup.3 as measured according to ASTM G65-04 (2010).

A method for laser-marking an iron-based sintered body includes a first step of forming with a first laser beam a plurality of dotted recesses with a predetermined depth in an identification mark area of a surface of an iron-based sintered body, and a second step of flattening with a second laser beam the surface within the identification mark area other than the dotted recesses. The first laser beam has an irradiation energy per unit area greater than an irradiation energy per unit area of the second laser beam.

A high-strength steel sheet includes a steel structure with: ferrite being 35% to 80%, martensite being 5% to 35%, and tempered martensite being 0% to 5% in terms of area fraction; retained austenite being 8% or more in terms of volume fraction; an average grain size of: the ferrite being 6 μm or less; and the retained austenite being 3 μm or less; a value obtained by dividing an area fraction of blocky austenite by a sum of area fractions of lath-like austenite and the blocky austenite being 0.6 or more; a value obtained by dividing, by mass %, an average Mn content in the retained austenite by an average Mn content in the ferrite being 1.5 or more; and a value obtained by dividing, by mass %, an average C content in the retained austenite by an average C content in the ferrite being 3.0 or more.

A three-dimensional shaped article production method is a three-dimensional shaped article production method for producing a three-dimensional shaped article by stacking layers and includes a first metal powder supply step of supplying a first metal powder having a first average particle diameter to a shaping table, a layer formation step of forming the layer by compressing the first metal powder supplied to the shaping table, a first liquid supply step of supplying a first liquid containing a second metal powder having a second average particle diameter and a binder to a portion of a constituent region of the three-dimensional shaped article, a second liquid supply step of supplying a second liquid containing at least either the second meal powder at a lower concentration than the first liquid or a third metal powder having a larger average particle diameter than the second average particle diameter and containing a binder to at least a portion of a surface layer region, and a sintering step of sintering a metal in the constituent region by heating a stacked body.

The present disclosure provides a method for preparing a powder material and an application thereof. The preparation method includes: obtaining an initial alloy ribbon including a matrix phase and a dispersed particle phase by solidifying an alloy melt, and then removing the matrix phase in the initial alloy ribbon while retaining the dispersed particle phase, so as to obtain a powder material composed of original dispersed particle phase. The preparation method of the present disclosure is simple in process and can prepare multiple powder materials of nano-level, sub-micron-level and micro-level. The powder materials have good application prospects in the fields such as catalytic materials, powder metallurgy, composite materials, wave-absorbing materials, sterilization materials, metal injection molding, 3D printing and coating.

The present disclosure provides a method for preparing a powder material and an application thereof. The preparation method includes: obtaining an initial alloy ribbon including a matrix phase and a dispersed particle phase by solidifying an alloy melt, and then removing the matrix phase in the initial alloy ribbon while retaining the dispersed particle phase, so as to obtain a powder material composed of original dispersed particle phase. The preparation method of the present disclosure is simple in process and can prepare multiple powder materials of nano-level, sub-micron-level and micro-level. The powder materials have good application prospects in the fields such as catalytic materials, powder metallurgy, composite materials, wave-absorbing materials, sterilization materials, metal injection molding, 3D printing and coating.