摘要:
A method for manufacturing a deposition mask comprising: a step of preparing a metal plate including a first surface and a second surface positioned on the opposite side of the first surface; and a processing step of forming through holes in the metal plate; wherein the processing step comprises: a first surface etching step of etching areas of the first surface so that first recesses are formed in the first surface; a step of coating the first recesses with a resin; a second surface etching step of etching areas of the second surface so that second recesses are formed in the second surface, each of the first recesses and each of the second recesses communicating with each other; and a step of removing the resin; wherein at least one of the first recesses includes a wall surface including a dent formed therein, or at least one of the second recesses includes a wall surface including a dent formed therein.
摘要:
A process of eliminating impurities dissolved in a contaminated liquid metal, continuously, by applying an electromagnetic field generated by linear induction pumps on the contaminated metal crosswise to a second duct through which the metal flows. The current density circulates lengthwise to the duct, and therefore, according to Lorentz force law, an electromagnetic force that is perpendicular to both is produced. When the impurities have a difference in electrical conductivity of at least one order of magnitude in decimal power, the resulting force that acts upon the particles causes a relative movement of these with respect to said metal, such that they can be moved and separated from said molten metal in a previous metallurgical step a particle is formed having an adequate electrical conductivity. The installation includes the aforementioned components in order to carry out the process.
摘要:
A production method of a maraging steel comprising: the step of producing, by vacuum melting, a remelt electrode which comprises from 0.2 to 3.0% by mass of Ti and from 0.0025 to 0.0050% by mass of N; and the step of remelting the remelt electrode to produce a steel ingot having an average diameter of 650 mm or more; wherein the resulting maraging steel comprises from 0.2 to 3.0% by mass of Ti.
摘要:
The invention relates to a method for producing a low-alloy steel ingot, comprising the following steps: a) melting all or part of an electrode using a vacuum arc remelting process, the electrode comprising, before melting, iron and carbon, the melted portion of the electrode being collected in a crucible and thus forming a melt within the crucible, and b) solidifying the melt by means of a heat exchange between the melt and a coolant, the heat exchange carried out enabling an average solidification speed to be established during step b), which is no higher than 45 μm/s, and enabling a low-alloy steel ingot to be obtained.
摘要:
The present invention relates to an apparatus for continuous treatment of two immiscible molten liquids having different densities. The apparatus comprises at least one open-ended helical reaction channel (3) arranged inside a substantially vertical housing (1), means for the continuous supply of the liquid with the higher density to the upper open end of said at least one reaction channel (3) and means for continuous supply of the liquid with the lower density to the lower open end of said at least one helical reaction channel (3), means for continuous removal of the liquid with the higher density at the lower open end of said helical reaction channel and means for removal of the liquid with the lower density from the upper open end of said helical reaction channel (3). The invention further relates to a method for continuous treatment of two immiscible molten liquids having different densities using the apparatus of the present invention.
摘要:
The present invention is a method for selective oxidation of one or more metals from an iron melt, comprising the steps of making available an iron melt in a converter, and adding easily reducible oxide to the iron melt in order thereby to oxidize said one or more metals, characterized in that the converter is provided with an arrangement for induction heating, by means of which the heat balance in the converter can be controlled fully or partially.
摘要:
Provided are an agitation device, a melting apparatus, and a melting method which achieve good melting efficiency without contaminating molten metal. The agitation device (150) is provided with a traveling magnetic field generating unit (160) which is disposed outside a charging tank (20) for storing molten metal (3) and generates, inside the charging tank (20), a magnetic field that travels downward along the rear sidewall (22) of the charging tank (20), whereby a flow of the molten metal (3) that rotates longitudinally about an axis approximately parallel to the surface of the molten metal (3) is produced in the molten metal (3). By charging aluminum cutting chips (2) into the molten metal (3) in which the flow is produced, the aluminum cutting chips (2) move with the flow of the molten metal (3), get into the molten metal (3) roughly in the position where a downward flow of the molten metal (3) is produced, and are immersed in the molten metal (3), and thus the melting of the aluminum cutting chips (2) is accelerated.
摘要:
A device and method for removing impurities in aluminum melt. The device comprises an upper furnace body, a lower furnace body, an intermediate partition plate, a crucible, heating elements and a charging opening. The intermediate partition plate is mounted between the upper furnace body and the lower furnace body. The upper furnace body, a mixing chamber and the heating element are above the intermediate partition plate. The crucible is amounted in the lower furnace body. The heating element is provided around the lower furnace body. The lower furnace body is provided with the charging opening and a pipeline. The upper furnace body is provided with an inlet valve and an exhaust valve. The mixing chamber and the crucible are connected by a jet pipe passing through the intermediate partition plate. A ceramic seal pad is used for sealing between the mixing chamber and the jet pipe. During use, the aluminum melt and a liquid flux are placed in the crucible, the liquid flux covers the aluminum melt, the pressure of the lower furnace body is increased, the aluminum melt first stably enters the mixing chamber along the jet pipe, then the liquid flux enters the mixing chamber in a manner of confined jet flow and is uniformly mixed with the aluminum melt, last the pressure of the lower furnace body is unloaded, so that the mixed liquid falls back into the crucible, and this operation may be repeated for multiple times. For the device and the method, the impurity removal is quick, the efficiency is high and the process is closed, so there is no environmental pollution, and the aluminum melt after the impurity removal may be directly cast.