36results about How to "Reduce the number of drawing passes" patented technology

The invention relates to continuous casting forming equipment and a process for an electromagnetic ejection filling core of a cladding material, belonging to the field of the continuous casting processing in metal material. The equipment provided by the invention comprises upper and lower temperature control crystallizers, a temperature measuring instrument, a metal temperature control furnace of the core, an outer metal temperature control furnace, a filling core tube, an electromagnetic pump, a secondary cooling device, a limiting device, a pressure sensor and a recession device, wherein the upper and lower temperature control crystallizers and a metal liquid filling core tube of the core are arranged on the same axis along the continuous casting direction; the electromagnetic pump is installed outside the upper and lower temperature control crystallizers and assembled on the same axis with the upper and lower temperature control crystallizers; the upper end of the metal liquid filling core tube of the core is connected with a metal temperature control crucible of the core, and the lower end is inserted into outer metal liquid; the outer metal liquid and the metal liquid of the core are isolated through the metal liquid filling core tube of the core; the outer metal liquid is cooled to form an outer metal tube; the metal liquid of the core is poured into the outer metal tube through the metal liquid filing core tube of the core; and a composite blank is ejected out by exerting the pressure through the electromagnetic pump. The invention eliminates cracks and vibration marks which are easy to occur in a common continuous casting blank, can continuously cast the cladding material once, obtains a composite interface of high quality and has the advantages of low production cost and high efficiency of subsequent processing.

The invention provides a preparation process for the short flow of an ultra-long copper alloy wire rod. The process includes the following steps: alloy melting, continuous casting, pulling, and a wire rod finished product, an atmosphere protective induction melting furnace is adopted to melt under the non-vacuum condition, the induction melting furnace is provided with a down-drawing, a horizontal, and an up-drawing continuous casting crystallizers which have different specifications, and the preparation is formed through continuously casting the wire rod. The invention can realize the expansion of a Cu-Cr-Zr alloy wire rod on the length through the down-drawing, horizontal, and up-drawing continuous casting, to meet the production requirement of the ultra-long Cu-Cr-Zr alloy wire rod; the protective atmosphere can protect oxidable elements, thereby obtaining Cu-Cr-Zr alloy wire rod materials which meet the requirement of alloying components, and produced wire rods uniformly are bright rods, the surface is not required to perform the scalping treatment. In addition, through changing the down-drawing, the horizontal, and the up-drawing continuous casting crystallizersw, continuous casting wire rods with various cross sections can be produced, and the rod material organization is better, thereby having the excellent plastic processing performance.

The invention discloses a NiTi nanowire and a preparation method thereof. Ni, Ti and V elements are mixed according to the atomic percentage Ni:Ti:V=31-37:29-37:26-40, and the alloy is obtained by arc melting Ingot casting; alloy ingots are forged and drawn to obtain wires; under normal temperature and pressure, nitric acid and methanol are prepared with an electrolyte solution at a volume ratio of 1:1 to 10; electrolytic anodes are made with wires, and stainless steel electrodes are used as electrolytic Cathode, put the electrolysis anode and the electrolysis cathode into the electrolytic cell with the electrolyte; use the constant voltage DC power supply as the electrolysis power supply, the output voltage is 2-9V, stop the electrolysis until the current density drops to zero; take out the electrolysis anode , NiTi nanowires were obtained after washing and drying. The present invention adopts the electrolytic method to prepare the electrolytically prepared NiTi nanowires, the diameter of which can be smaller than 100nm, and the length can reach more than 15 μm; the whole preparation method is simple, only needs to be drawn to 1-2mm, and the number of drawing passes is less, and the process is simple , low cost, low energy consumption.

The invention discloses a preparation method of high aluminum zinc-aluminum pseudo-alloy rod materials and wire materials. The preparation method comprises the following steps that a pure aluminum rod or an aluminum alloy rod and a pure zinc rod are put into a package of pure aluminum or aluminum alloy materials in a certain order, so that composite billet materials are formed; after heating the composite billet materials and extrusion dies of an extrusion machine, then the composite billet materials are put into the extrusion dies, the billet materials are extruded, and composite pseudo-alloy rod materials are prepared; and the obtained composite pseudo-alloy rod materials are drawn and diameter-reduced for multiple passes, and the wire materials are manufactured. According to the preparation method of high aluminum zinc-aluminum pseudo-alloy rod materials and wire materials, the aluminum rod and the zinc rod arranged in the package are extruded, so that the pseudo-alloy rod materials are formed by deformation and mixing, and then the rod materials are drawn and diameter-reduced to obtain the high aluminum zinc-aluminum pseudo-alloy wire materials. In the above process, the zinc and the aluminum are only deformed, the diameter is reduced, alloying does not happen between the zinc and the aluminum, the eutectic structure and the hard brittle phase are not produced, the deformation ability of the obtained rod materials is good, and a high aluminum zinc-aluminum coating layer is formed in heat spraying preparation of an anticorrosive coating after the pseudo-alloy wire materials are prepared by drawing and diameter reduction.

The invention discloses a manufacturing method of a 304 wear-resistant stainless steel wire. The manufacturing method comprises the following steps that 1) a raw material 304 stainless steel wire material with the diameter of 1.3 times larger than the preset diameter of a finished product is selected; 2) annealing is carried out on the 304 stainless steel wire material; 3) multi-pass drawing treatment is carried out on the annealed stainless steel wire material, if the size of the finished product is reached, the finished product is obtained, if the size is not the size of the finished product, annealing is carried out again, air cooling is carried out on the annealed stainless steel wire material until the temperature of the steel wire material reaches the room temperature, and the stainless steel wire material subjected to drawing and annealing is obtained; 4) the diameter of the stainless steel wire material subjected to drawing and annealing is 1.3 times larger than the preset diameter of the finished product, the step 3 is repeated until the diameter of the stainless steel wire subjected to drawing and annealing is 1.3 times less than or equal to the preset diameter of the finished product, and then the step 5 is carried out; and 5) drawing treatment is carried out on the stainless steel wire material subjected to drawing annealing to reach the size of the finished product, and the 304 wear-resistant stainless steel wire finished product is manufactured. According to the 304 wear-resistant stainless steel wire finished product manufactured by the method, the tensile strength is improved by 1-3 times, the micro vickers hardness is improved by 2-3 times, and the wear performance is improved by 5-30%.