A method for manufacturing a tool head includes forming a first and a second part from a powder composition. The first and the second parts include corresponding joining surfaces, and the parts have outer surface portions configured to form portions of a peripheral envelope surface of the tool head. The method further includes forming corresponding grooves in the corresponding joining surfaces, assembling the parts into a shape of a tool head by bringing the joining surfaces into contact to form an interface, so that each pair of corresponding grooves forms a channel extending in the interface, the channel having an inlet opening in a rear end of the tool head and an outlet opening in a front end or in the peripheral envelope surface of the tool head, and joining the assembled parts in a sintering operation to form the tool head.

A sintered material for use in an internal combustion engine, such as a valve seat insert, is provided. The material includes a pressed base powder metal mixture and a Cu-rich phase infiltrated in pores of the base powder metal mixture. The base powder metal mixture includes at least one of Mo and W, and at least one additive, such as B, N, and/or C. The amount of the Mo and/or W is 50 wt. % to 85 wt. %, based on the total weight of the material. The at least one additive is present in a total amount of 0.2 to 25 wt. %, based on the total weight of the material, and the Cu-rich phase is present in an amount of 15 wt. % to 50 wt. %, based on the total weight of the material. The material also has a thermal conductivity of at least 70 W/mK.

The present invention concerns a process for manufacturing a cutting tool, in particular a milling cutter, such as an end mill. The process comprises providing one or two partial molds. In an embodiment, two mold units are used, each mold unit comprising two openings. In accordance with this embodiment, the process comprises joining the two mold units so as to form a mold, and inserting at least one pressing punch through one of the remaining openings in order to press a metal, ceramic or carbide powder added to the mold. The pressed cutting tool can be ejected by way of a rotational ejection rod, which pushes the cutting tool out of the mold by way of a rotational, translational movement. The invention also concerns an apparatus for conducting the process.

Disclosed is a method for preparing vanadium or vanadium alloy powder from a vanadium-containing raw material through a shortened process, including: calcinating a mixture of a vanadium-containing raw material and an alkali compound for oxidation to form a water-soluble vanadate; purifying the vanadate followed by vanadium precipitation to produce an intermediate CaV.sub.2O.sub.6 with high purity; dissolving CaV.sub.2O.sub.6 in a molten-salt medium together with other raw materials to form a uniform reaction system; and introducing a reducing agent to the system followed by separation, washing and drying to produce vanadium or vanadium alloy powder having a particle size of 50-800 nm and a purity of 99.0 wt % or more. The method can continuously process vanadium-containing raw materials to prepare vanadium or vanadium alloy powder.

The invention relates to a method for producing hard metal powder suitable for manufacturing hard metal products comprising metal carbides and a binder. To provide a method which is easy to carry out and which provides high quality hard metal powder, the method is characterized by the steps of: a) dissolving in water, water soluble raw materials and a binder source to form an aqueous solution, b) drying the aqueous solution to form a precursor powder having the raw materials homogenously distributed throughout the precursor powder, c) decomposing the precursor powder by heating the powder in an inert atmosphere to remove gas evolved in the decomposition of the raw materials, d) grinding the precursor powder and mixing it with a liquid media to produce a suspension, e) spray drying the suspension to agglomerate the precursor powder, and f) heat treating the agglomerated precursor powder to form a hard metal powder containing agglomerates of carbides evenly distributed and bonded to a metallic matrix.

A sliding member (1) is formed of a sintered compact. The sintered compact includes: a base layer (3), which mainly contains an Fe-based structure and further contains 1.0 wt % to 5.0 wt % of Cu, a metal having a melting point lower than a melting point of Cu, and C; and a sliding layer (2), which is sintered together with the base layer (3) in a state of being held in contact with the base layer (3) and has a sliding surface (A). The sliding layer (2) mainly contains an Fe-based structure containing at least one kind of alloy element selected from Ni, Mo, Mn, and Cr and further contains Cu and C, and the content of Cu in the sliding layer (2) is larger than the content of Cu in the base layer.

Provided is a method for efficiently manufacturing fine metal particles applicable as a fuel cell electrode catalyst. Provided is a method of manufacturing fine metal particles, including the step of: a hydrogen bubbling step to perform bubbling to a reaction solution, wherein: the reaction solution is prepared by allowing seeds of fine metal particles in a dispersed state and a water soluble noble metal precursor to co-exist in a water-containing solvent; and the bubbling is performed with a reaction gas containing a hydrogen gas, is provided.

A compound for metal powder injection molding includes secondary particles in which first metal particles are bound to one another, and a matrix region including a binder and second metal particles composed of the same constituent material as the first metal particles and having a smaller average particle diameter than the first metal particles. The constituent material of the first metal particles is any of an Fe-based alloy, an Ni-based alloy, and a Co-based alloy.

The disclosure provides a method of producing a platinum colloid comprising reducing platinum ions by the use of a platinum ion solution, water, a nonionic surfactant, a pH adjusting agent, and a reducing agent, wherein the platinum ion solution contains platinum at a concentration of 20 w/v %, the nonionic surfactant is polysorbate 80, the pH adjusting agent is an alkaline metal salt, the reducing agent is a lower alcohol, the volume of the water is from 600 to 660 times that of the platinum ion solution, the volume of the nonionic surfactant is from 0.20 to 0.30 times that of the platinum ion solution, the volume of the pH adjusting agent as a 5 w/v % aqueous solution is from 10 to 30 times that of the platinum ion solution, and the volume of the reducing agent is from 27 to 37 times that of the platinum ion solution,
as well as the platinum colloid produced by the method.

Assemblies fabricated by additive manufacturing include an object and a base plate providing support to the object during the manufacturing process. The geometry of the base plate is defined to optimize space and material constraints. During sintering, the base plate is reduced in area in a manner complementing the reduction in the footprint of the object, preserving the fidelity of the finished object.