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2. 发明授权

US06250366B1 Method for the production of precision castings by centrifugal casting with controlled solidification 失效
标题翻译：通过离心铸造控制凝固生产精密铸件的方法
公开(公告)号：US06250366B1
公开(公告)日：2001-06-26
申请号：US08937995
申请日：1997-09-26
申请人： Alok Choudhury , Harald Scholz , Matthias Blum , Georg Jarczyk , Marek Gorywoda , David Francis Lupton
发明人： Alok Choudhury , Harald Scholz , Matthias Blum , Georg Jarczyk , Marek Gorywoda , David Francis Lupton
IPC分类号： B22D1306
CPC分类号： B22D13/04 , B22D27/003 , B22D27/045 , B22D27/15
摘要： In the production of precision castings by centrifugal casting with controlled solidification, a melt is cast under vacuum or shield gas into a pre-heated mold (15) with a central gate (19) and several mold cavities proceeding from the gate toward the outer circumference (Da) of the mold (15). To prevent the formation of shrinkholes and porous areas in the castings, to save energy, and to increase the production rate, the mold (15) is operated at temperatures which decrease from the inside toward the outside. The mold consists of a material or material combination with a coefficient of thermal conductivity lower than that of copper. Before the melt is poured, the mold (15) is heated, starting from the gate (19), by a heating device (20), which projects into the gate, so that the gate (19) reaches a temperature which is a function of the material being cast. Heating is carried out at a rate sufficient to produce a temperature gradient of at least 100° C., preferably of 200-600° C., even more preferably of 300-500° C., between the inside circumference (Di) and the outside circumference (Da). The invention is used preferably for the production of precision castings of metals of the group titanium, titanium alloys with at least 40 wt. % of the titanium, and superalloys.
摘要翻译：在通过具有受控凝固的离心铸造生产精密铸件时，将熔体在真空下或保护气体下铸入具有中心浇口（19）的预热模具（15）中，并且从浇口朝向外圆周（15）的（Da）。为了防止在铸件中形成收缩孔和多孔区域，为了节省能量并提高生产率，模具（15）在从内向外减小的温度下运行。模具由材料或材料组合组成，其导热系数低于铜的导热系数。在熔融物浇注之前，模具（15）从浇口（19）开始被加入装置（20）加热，加热装置（20）突入浇口，使得浇口（19）达到功能的温度的材料被铸造。以足以在内圆周（Di）和内径（Di）之间产生至少100℃，优选200-600℃，甚至更优选300-500℃的温度梯度的速率进行加热外围（Da）。本发明优选用于生产钛，钛合金金属的精密铸件，其具有至少40wt。％的钛和超级合金。

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