4results about How to "Inhibit involvement" patented technology

The invention discloses a method for synchronously inhibiting a pre-crystallization structure and a fracture chilling layer of a pressure chamber for high-pressure casting of an AlSi10MnMg alloy material, and belongs to the technical field of preparation of non-ferrous metal new materials. Alloy components are regulated and controlled to a narrow interval through transfer ladle refining and holding furnace standing, and the cleanliness is measured again; a high-pressure casting full-process temperature drop control system is constructed, and the staying time of molten aluminum in a pressure chamber, the single circulation time of soup taking of a material spoon and the filling rate of the pressure chamber are controlled by combining high-temperature standing of molten aluminum in a heat preservation furnace, heat radiation heat preservation of the material spoon, high-temperature hot oil circulation heat preservation of a split pressure chamber and a high-low-speed and low-high-speed three-stage injection process; and die-casting parameters are optimized to be matched with the split type pressure chamber to achieve precise mold filling and temperature control. According to the method, a coarse pre-crystallization structure can be eliminated, the maximum size of a fracture chilling layer is reduced, the uniformity of a microscopic structure of a casting is improved, and the as-cast tensile strength, the yield strength and the percentage elongation after fracture of a casting body meet the requirements of high-end precision parts for mechanical property stability.

The application discloses a method for synchronously inhibiting pre-crystalline structure and fracture chill layer of a high-pressure casting AlSi10MnMg alloy material, and belongs to the technical field of non-ferrous metal new material preparation. The method comprises the following steps: refining by a transfer ladle, staticizing in a holding furnace, regulating and controlling alloy components to a narrow range, and re-measuring cleanliness; a high-pressure casting whole-process temperature drop control system is constructed, high-temperature staticizing of aluminum liquid in the holding furnace, material ladle heat radiation insulation, high-temperature hot oil circulation insulation of a split pressure chamber, and a three-stage pressure injection process with high slow speed and low fast speed are combined to control the residence time of the aluminum liquid in the pressure chamber, the material ladle soup taking single cycle time and the filling rate of the pressure chamber; and the die casting parameters are optimized to match the split pressure chamber to realize precise mold filling and temperature control. The method can eliminate coarse pre-crystalline structure, reduce the maximum size of the fracture chill layer, improve the microstructure uniformity of the castings, and make the cast body as-cast tensile strength, yield strength and elongation after fracture meet the demand of high-end precision parts on mechanical property stability.

The present invention addresses the problem of providing a monitoring device and a monitoring method capable of suppressing fluctuation of molten metal or gas entrainment into the molten metal by monitoring the shake of the molten metal in a plunger sleeve during a low-speed injection period at the initial injection stage of an injection molding machine and controlling the injection speed on the basis of the monitoring result. A monitoring device according to the present invention is provided with: an acquisition unit that acquires acceleration information of a plunger during an injection operation; a determination unit that determines the shake of the molten metal in the plunger sleeve on the basis of information relating to the acceleration in the direction of travel of the plunger from the start of injection of the molten metal in the plunger sleeve by the plunger to a predetermined period among the acceleration information; and an output unit that outputs the determination result of the shake of the molten metal.

This invention provides an immersion nozzle for continuous casting capable of suppressing the entrainment of protective slag into molten steel. It is an immersion nozzle for injecting molten steel from a tundish into a mold of a continuous casting machine, characterized by comprising: a molten steel rectifying section immersed in molten steel and disposed above the molten steel surface formed inside the mold; and a tubular section extending through the molten steel rectifying section in the vertical direction and discharging molten steel into the interior of the mold. The cross-sectional shape of the molten steel rectifying section, at least within a predetermined range in the casting direction from the molten steel surface to the molten steel, is an elliptical or streamlined shape having a major axis in the width direction of the mold. The molten steel rectifying section has a continuous shape in which the ratio of the minor axis b to the major axis a in the cross-sectional shape of the outer periphery of the molten steel rectifying section is 0.95 or less. The cross-sectional shape of the outer periphery of the tubular section is circular or elliptical in the width direction of the mold, and the ratio of the length β of another axis orthogonal to one axis substantially parallel to the long side of the mold to the length α of that axis is 0.90 or more and 1.1 or less.