专利类型:  发明专利
申请号:  US201414439798
申请日期:  2014-01-23
公开号:  US9427796B2
公开日期:  2016-08-30
申请人:  KK KOBE SEIKO SHO (KOBE STEEL LTD )
发明人:  NAKAOKA TAKEHIRO;KUROSAWA Eisuke;TSUTSUMI KAZUYUKI;OYAMA HIDETO;KANAHASHI HIDETAKA;ISHIDA HITOSHI;TAKAHASHI DAIKI;MATSUWAKA Daisuke
地址:  
摘要:  Disclosed is a continuous casting method in which a melt obtained by melting titanium or a titanium alloy is poured into a bottomless mold and is drawn downward while being solidified, wherein: the surface of the melt in the mold is heated by horizontally moving a plasma torch over the surface of the melt; thermocouples are provided at a plurality of locations along the circumferential direction of the mold; if the temperature of the mold measured by one of the thermocouples is lower than a target temperature, then the output of the plasma torch is increased when the plasma torch comes close to the location where that thermocouple is installed; and if said temperature is higher than the target temperature, then the output of the plasma torch is decreased when the plasma torch comes close to the location where that thermocouple is installed.
主权项:  A method for continuous casting an ingot made of titanium or a titanium alloy by pouring molten metal prepared by melting titanium or a titanium alloy into a bottomless mold and drawing the molten metal downward while being solidified, the method comprising: a heating step, where, while a plasma torch is horizontally moved along a predetermined moving track above the surface of the molten metal in the mold, the surface of the molten metal is heated by plasma arcs generated by the plasma torch at a plurality of plasma torch positions along the predetermined moving track, wherein moving the plasma torch along the predetermined moving track sequentially positions the plasma torch in a plurality of predetermined plasma torch positions relative to the surface of the molten metal in the mold; a temperature-measuring step for measuring a temperature of the mold by each of a plurality of temperature sensors provided in a plurality of temperature sensor positions of the mold along the circumferential direction of the mold; and a heat input quantity control step for controlling heat input quantity per unit area applied from the plasma torch to the surface of the molten metal based on the temperature of the mold measured by the temperature sensors and a target temperature preset in each of the temperature sensors, wherein the heat input quantity per unit area applied from the plasma torch to the surface of the molten metal near a specific temperature sensor position of the plurality of temperature sensor positions is controlled in a region along the predetermined moving track that corresponds to the specific temperature sensor position.
专利分类号:  B22D11/117;B22D21/00;B22D11/103;B22D11/16;B22D27/04;B22D11/041;B22D11/00;B22D27/02
专利状态:  有效专利
代理人:  
代理机构:  Studebaker & Brackett PC
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