公开(公告)号：US4278124A

公开(公告)日：1981-07-14

申请号：US23892

申请日：1979-03-26

申请人： Kazuo Aso ,  Takesaburo Nishioka ,  Takemi Yamamoto ,  Naomichi Miyai ,  Jun-ichi Matsuno

发明人： Kazuo Aso ,  Takesaburo Nishioka ,  Takemi Yamamoto ,  Naomichi Miyai ,  Jun-ichi Matsuno

IPC分类号： B22D7/04 ,  B22D27/04

CPC分类号： B22D7/04

摘要： The casting apparatus for a hollow steel ingot is constructed such that: at least three concentric pipes are provided in the central portion of an ordinary mold for a steel ingot; a core is formed by filling up a space formed between the first outer-most pipe having the largest diameter and the second pipe disposed inwardly of the first pipe with granular refractory material wherein zircon or chromite sand is bound by a binder such as an organic resin; a double pipe is disposed inwardly of said core and forming a gas flow course for cooling the core; and pouring gates formed through the stool for feeding molten steel at an intermediate portion between the inner wall of said mold and the core. The method for producing a hollow steel ingot by use of the casting apparatus as described above comprises: blowing the cooling gas from above into the third inner-most pipe having the least diameter, passing the gas through the second pipe from below and discharging it to above; cooling the molten steel fed into the mold and brought into contact with the outer surface of the first pipe by cooling the core through the inner wall of the second pipe; and controlling the cooling conditions for the core such as the thickness of the cylindrical refractory material of the core, the cross-sectional area of the cooling gas flow course and the thickness of the second pipe so that the finally solidifying position of the molten steel fed can be set at a position which is apart from the core side at a distance of 20 to 50% of the wall thickness of the hollow steel ingot to be formed.

摘要翻译： 用于中空钢锭的铸造装置构造成：在用于钢锭的普通模具的中心部分中至少设置三个同心管; 通过用粒状耐火材料填充形成在具有最大直径的第一最外管之间的空间和设置在第一管内侧的第二管之间形成的芯，其中锆石或铬铁矿砂被诸如有机树脂 ; 双管配置在所述芯的内侧，形成用于冷却芯的气流路径; 以及通过所述粪便形成的浇注浇口，用于在所述模具的内壁和所述芯之间的中间部分处供给钢水。 使用如上所述的铸造装置制造中空钢锭的方法包括：将上述冷却气体从上方吹入具有最小直径的第三最内管中，使气体从下方通过第二管，并将其排出到 以上; 通过冷却芯通过第二管的内壁，冷却供给到模具中的钢水并与第一管的外表面接触; 并且控制芯的冷却条件，例如芯的圆筒形耐火材料的厚度，冷却气流路的横截面面积和第二管的厚度，使得钢水的最终凝固位置 可以设置在与要形成的中空钢锭的壁厚的20〜50％的距离处于芯侧的位置。