A metal wire, which is one of a tungsten wire and a tungsten alloy wire, includes alkali metal on the surface thereof. The amount of alkali metal is at most 2.0 μg per 1 g of the metal wire.

The disclosure relates to a method for manufacturing a biocompatible wire, a biocompatible wire comprising a biocompatible metallic material and a medical device comprising such wire. The method for manufacturing a biocompatible wire comprises providing a workpiece of a biocompatible metallic material, cold working the workpiece into a wire, and annealing the wire, wherein a cold work percentage is 97 to 99%, wherein the cold working is a drawing with a die reduction per pass ratio in a range of 6 to 40%, and wherein the annealing is done in a range of 850 to 1100° C.

An electrically assisted forming process and device for a high-strength metal alloy thin-walled pipe includes a die sleeve, wiring terminals, a pulse power supply, a die seat, sealing baffle plates, a drawing die, and a cooling water circulation chamber. A process for forming a high-strength metal alloy thin-walled pipe includes first, graphite or fusible metal, i.e., an aluminum rod, is introduced into a high-strength metal alloy pipe to be drawn to fill the whole pipe; and then, pulse current is introduced into a plastic deformation area of the thin-walled pipe. A cooling device can be provided to achieve a good cooling effect. The thin-walled pipe with corresponding length is cut according to a production requirement after processing is completed, and annealing treatment is performed in a vacuum heat treatment furnace.

A copper treatment additive and methods are provided for applying copper to base metal effectively and efficiently while requiring a reduced frequency of replacing a treatment bath of copper sulfate solution. The copper treatment additive comprises an acidic, liquid mixture for use with a solution of copper sulfate and sulfuric acid to produce a strongly adherent, uniform metallic copper coating on steel. The copper treatment additive includes a first portion of Polyethylene Glycol 3350, a second portion of 4,4′-Methylene Dianiline; and a third portion of 31.45% Hydrochloric Acid. The copper coating has been observed to facilitate wire drawing processes and enhance characteristics associated with welding and decorative wire.

An apparatus for manufacturing a multi-layer pipe is provided. The apparatus includes a ram extruding a matrix pipe, which is formed by inserting one or more insert pipes having different diameters into a receiving pipe, with a constant compression force, a heat-treatment unit heat-treating the matrix pipe extruded from the ram, and a drawing unit drawing, with a constant drawing force, the matrix pipe passing through the heat-treatment unit into a multi-layer pipe having a predefined diameter.

An apparatus and method for modifying an aspect of an exterior polymer material or polymer type material of a linear substrate with a fluid. The apparatus include a variable exposure gap within which the linear substrate is exposed to the fluid. The width of the exposure gap is varied with the speed of the linear substrate traversing the exposure gap to maintain a constant exposure time of the linear substrate with the modifying fluid.

Subject matter of the present invention is a method of applying coating layers (9) to a substrate (1, 11, 21, 31), wherein the substrate (1, 11, 21, 31) is drawn through a coating chamber (2) containing a pressurized coating agent (3) being liquefied or softened by means of a thermal exposure, wherein the substrate (1, 11, 21, 31) is drawn through a drawing tool (8), wherein the coating agent (3) serves as a lubricant between the drawing tool (8) and a surface of the substrate (8) and wherein at the same time the coating layer (9) is applied to the surface of the substrate (8). Subject matter of the invention is also a corresponding apparatus for applying a coating layer (9) to a substrate (1, 11, 21, 31). By means of the invention coating layers can be applied to a substrate in an efficient and economical way.

Disclosed are a micro fiber and a method of manufacturing the micro fiber are proposed. The micro fiber may be manufactured by controlling thickness and Young's modulus thereof using hollow fiber.

A method for preparing a copper-based graphene/aluminum composite wire with high electrical conductivity is disclosed. An electrodeposition solution for the wire includes the following components, in mass percentage: 20 wt % of CuSO.sub.4, 0.005 wt % to 0.020 wt % of benzalacetone, 2 wt % to 5 wt % of NaCl, 0.08 wt % to 0.5 wt % of graphene, 0.003 wt % to 0.016 wt % of N,N-dimethylformamide (DMF), and the balance of deionized water. The preparation process of the wire is composed of: electrodeposition, drawing, and annealing. The obtained wire has excellent electrical conductivity and tensile strength, which can effectively improve the electric power transmission efficiency and reduce the electrical power loss. By the above electrodeposition solution and simple preparation method, a utility model wire with high transmission efficiency can be prepared, where the comprehensive performance and microstructure of the composite can be ensured by controlling process parameters.

A drawing die system that has least two probes to measure various characteristics of components of the die box or the wire being drawn through the die box. The system includes a smart die that in which the multiple probes send information to a data processing unit. The data processing unit takes the information from the various probes and controls the various parameters of the wire drawing process. One smart die has a probe that collects information directly from a drawing die holder. The smart die also includes a force sensor and is configured to allow a die box to be displaced along an axis that is parallel to the direction in which the wire is drawn. The data processing unit controls various wired drawing parameters such as wire drawing speed, coolant pressure and the rate at which the coolant is pumped through the system.