摘要:
A method for manufacturing a metallic material for rheocasting or thixoforming and a metallic material formed using the method are provided. The method includes: applying an electromagnetic field to a vessel and loading a molten metal into the vessel; and cooling the molten metal to form a metallic material for rheocasting or thixoforming. The entire volume of molten metal is rapidly and uniformly cooled throughout, from the wall toward the center of the vessel, without generating latent heat caused by the formation of solidification layers at the early stage of cooling. The molten metal in the vessel is cooled rapidly below its liquidus temperature within 1-10 seconds after the loading of the molten metal into the vessel, so that numerous uniform crystal nuclei are created throughout the entire volume of molten metal to form a metallic material having uniform, micro, spherical particles.
摘要:
A method for manufacturing a metallic material for rheocasting or thixoforming and a metallic material formed using the method are provided. The method includes: applying an electromagnetic field to a vessel and loading a molten metal into the vessel; and cooling the molten metal to form a metallic material for rheocasting or thixoforming. The entire volume of molten metal is rapidly and uniformly cooled throughout, from the wall toward the center of the vessel, without generating latent heat caused by the formation of solidification layers at the early stage of cooling. The molten metal in the vessel is cooled rapidly below its liquidus temperature within 1-10 seconds after the loading of the molten metal into the vessel, so that numerous uniform crystal nuclei are created throughout the entire volume of molten metal to form a metallic material having uniform, micro, spherical particles.
摘要:
Provided is an apparatus for continuously manufacturing a plurality of high-quality billets containing fine, uniform spherical particles, with improvements in energy efficiency and mechanical properties, cost reduction, convenience of casting, and shorter manufacturing time. The apparatus includes a first sleeve (21); a second sleeve (22) for receiving molten metals, one end of the second sleeve being hingedly connected to one end of the first sleeve at a predetermined angle; a stirring unit (1) for applying an electromagnetic field to an inner portion of the second sleeve; a second plunger (32) that is inserted into the other end of the second sleeve to define the bottom of the second sleeve for receiving the molten metals and to pressurize a prepared slurry; and a first plunger (31) that is inserted into the other end of the first sleeve, the first plunger being operated in such a manner that when the second plunger pushes the slurry toward the first plunger, the first plunger is fixed in the first sleeve, and when a billet with a predetermined size is formed, the first plunger withdraws from the billet.
摘要:
Provided is a rheoforming apparatus that ensures the manufacture of products with fine, uniform spherical particles, with improvements in energy efficiency and mechanical properties of the products, cost reduction, convenience of forming, and shorter manufacturing time. The apparatus includes a first sleeve (21), an end of which is formed with an outlet vent (23) for releasing slurries; a second sleeve (22) for receiving molten metals, an end of the second sleeve being hinge-connected to the other end of the first sleeve at a predetermined angle; a stirring unit (1) for applying an electromagnetic field to an area of the second sleeve in which the molten metals are present; a plunger (3), which is inserted into the other end of the second sleeve to block the other end of the second sleeve for receiving the molten metals and to pressurize the slurries; and a forming unit (6), which is connected to the outlet vent of the first sleeve to form products with a predetermined shape using the slurries.