The present disclosure provides a method of manufacturing a composite material. The method can include compacting a copper alloy powder into a plurality of substantially uniform compressed sub-assemblies such that the copper alloy powder has a density that is greater than 50%. The plurality of compressed sub-assemblies can be layered relative one another within an aperture of a shell, the plurality of compressed sub-assemblies to form a consecutive assembly of compacted copper alloy. The shell may include one of the following: a precipitation hardened copper alloy, copper alloy, and carbon steel. The consecutive assembly can be sealed within the shell to form a billet. The billet can be hot-extruded to form a rod, and the extruded rod can be further drawn to form a composite wire of a desired diameter. The composite wire may be used to create a composite welding electrode.

According to the invention, the electrode wire (1) for electric discharge machining comprises a metal core (2), in one or more layers of metal or metal alloy. On the metal core (2), a coating (3) having an alloy different from that of the metal core (2) contains more than 50 wt % zinc. The coating (3) comprises copper-zinc alloy (3a) of fractured ? phase, and covers the majority of the metal core (2). The coating (3) contains covered pores (5a, 5b, 5c, 5d, 5) larger than 2 ?m.

The invention discloses electric conductor combined by composite conductor and its manufacturing method; the electric conductor forms interface with same or different characteristics among each layer contact surfaces with same or different properties, such as mixture, crystals, alloy, oxysome, etc. When it is electrified, it produces kinds of same or different current effect, such as skin effect, eddy current, ring current, magnetic effect, heat effect, crowding effect, or combined effect which combines each above-mentioned effect; it will play special role and effect if applied on reserved equipment.

Provided is a gadolinium wire rod including gadolinium as a main component and having a Vickers hardness (HV) 120 or less.

Provided is a metal-covered gadolinium wire rod including: a gadolinium wire including gadolinium as a main component, as a core; and a clad layer including, as a main component, a metal other than gadolinium, the clad layer covering the periphery of the core.

A method for producing a feedstock wire is produced from a first metal strip and at least one further metal strip by roll forming, wherein in particular the first metal strip and the at least one further metal strip are made of differing metals, preferably of differing meals having differing yield points, wherein a jacket, which in the final shape completely surrounds the at least one further metal strip in the circumferential direction, is formed from the first metal strip in a plurality of passes by roll forming using a plurality of roll stands, and wherein, first, exclusively only the first metal strip is formed to a preliminary shape in a plurality of passes using a first group of roll stands and, thereafter, the first metal strip and the at least one further metal strip are jointly formed to the final shape in a second group of roll stands.

The present invention provides an isothermal processing method for making an isothermal processed copper clad aluminum composite comprising: providing an aluminum component and a copper component; cleaning the aluminum component and shape finishing the aluminum component; extruding the aluminum component into a core aluminum billet; cleaning the copper component; transforming the copper component into a copper cladding layer; cladding longitudinal and circumferential surfaces of the core aluminum billet with the copper cladding layer and molding the core aluminum billet and the copper cladding layer together to form a copper cladded aluminum billet; and transforming the copper cladded aluminum billet into an isothermal processed copper cladded aluminum composite through isothermal rolling and annealing. The present invention also provides an isothermal processed copper cladded aluminum composite and a system for manufacturing an isothermal processed copper cladded aluminum composite.

A method of fabricating composite filaments is provided. An initial composite filament including a core and a cladding (such as a Pt-group metal) is cut into smaller pieces (or is first mechanically reduced and then cut into smaller pieces). The smaller pieces of the filaments are inserted into a metal matrix, and the entire structure is then further reduced mechanically in a series of reduction steps. The process can be repeated until the desired cross sectional dimension of the filaments is achieved. The matrix can then be chemically removed to isolate the final composite filaments with the cladding thickness down to the nanometer range. The process allows the organization and integration of filaments of different sizes, compositions, and functionalities into arrays suitable for various applications. Materials and components made from such composite filaments and arrays of composite filaments are also disclosed.

This invention provides a method for producing a polishing bar made of valve steel 53Cr21Mn9Ni4N. The process flow is as below: electric furnace smelting.fwdarw.outside-the-furnace refining.fwdarw.continuous casting.fwdarw.heating.fwdarw.high-speed wire rolling.fwdarw.heat treatment (off-line/online).fwdarw.straightening.fwdarw.polishing.fwdarw.inspection.fwdarw.storage. The production method of the invention adopts a casting method of continuous casting to overcome the poor high-temperature plasticity and the great deformation resistance of 53Cr21Mn9Ni4N which leads to a difficulty in continuous casting. The continuous casting is directly carried out on casting billets for rolling, which greatly reduces the material loss and energy consumption of this step, and improves the yield of the billets. The high-speed wire precision rolling technology is directly used on the continuous casting billets to improve the production efficiency, and greatly improve the size precision control of rolled and finished wire rods.

Disclosed is a method for forming a square-wire conductor, which includes: providing a circular conductor with a diameter d; passing the conductor through a gap of a longitudinal calendering roller to longitudinally calender the conductor up and down to form a conductor with flat upper and lower surfaces, the gap L1 of the longitudinal calendering roller is 0.886 d to 0.911 d; longitudinally and transversely straightening the conductor; passing the conductor through a gap of a transverse calendering roller to transversely calender the conductor left and right to form a conductor with flat left and right surfaces, the gap L2 of the transverse calendering roller is 0.886 d to 0.911 d; and longitudinally and transversely straightening the conductor.