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1.发明申请COMPOSITE GEOMETRICAL DESIGN FOR A GRAIN STARTER IN A BRIDGMAN INVESTMENT CASTING PROCESS 有权用于BRIDGMAN投资铸造工艺中的谷物起动器的复合几何设计公开(公告)号：US20140332175A1
公开(公告)日：2014-11-13
申请号：US13889534
申请日：2013-05-08
CPC分类号： C30B11/00 , B22C7/02 , B22C9/065 , B22C13/08 , B22C13/085 , B22D15/04 , B22D27/04 , C30B11/006 , C30B11/14 , C30B29/52 , C30B35/00
摘要： A grain starter for use in solidification of molten metallic material forming an article having a directional grain structure and a method for solidifying an article having a directional grain structure with a substantial absence of stray grains. The grain starter comprises a grain-starting material that initiates grain growth in the molten metallic material in a preselected crystallographic direction. The grain-starting material has a melting temperature higher than the metallic material forming the article lest the grain starter be modified by contact with the molten material. The grain starter further includes a feature that modifies heat transfer characteristics of the metallic material in contact with it in order to produce an article having grains oriented in the preselected crystallographic orientation and modifies the profile of the advancing solidification front. The article is substantially free of stray grains not oriented in the preselected crystallographic direction.
摘要翻译： 用于固化形成具有定向晶粒结构的制品的熔融金属材料的晶粒启动器和具有基本上没有杂散晶粒的具有定向晶粒结构的制品的固化方法。 谷物起动器包括在预选的晶体方向上引发熔融金属材料中的晶粒生长的晶粒起始材料。 晶粒起始材料的熔融温度高于形成制品的金属材料，以免通过与熔融材料接触来改变谷物起动机。 晶粒起动器还包括改变与其接触的金属材料的传热特性的特征，以便产生具有以预选结晶取向定向的晶粒的物品，并改变前进固化前沿的轮廓。 该制品基本上没有未在预选晶体方向取向的杂散颗粒。
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公开(公告)号：US20160184888A1
公开(公告)日：2016-06-30
申请号：US14478258
申请日：2014-09-05
CPC分类号： B22D27/045 , B22D21/005 , C22C19/05 , C22C19/057 , C22F1/10 , F01D5/28 , F05D2300/177
摘要： An article and a method for forming a single crystal casting are disclosed. The article includes a single crystal nickel-based superalloy having a composition including greater than about 80 ppm boron (B) and a substantially single crystal microstructure with at least one grain boundary. A creep rupture strength of the article is substantially maintained up to a mismatched grain boundary of about 40 degrees. The method for forming a single crystal casting includes positioning a mold on a cooling plate, the mold including a single crystal selector, providing a molten nickel-based superalloy composition in the mold, the molten composition including greater than about 80 ppm boron (B), cooling the molten composition with the cooling plate, and forming a unidirectional temperature gradient by withdrawing the mold from within a heat source to form the single crystal casting including a substantially single crystal microstructure having at least one grain boundary.
摘要翻译： 公开了一种用于形成单晶铸件的制品和方法。 该制品包括具有包括大于约80ppm硼（B）的组成的单晶镍基超级合金和具有至少一个晶界的基本单晶微结构。 制品的蠕变断裂强度基本上保持到约40度的错配晶界。 用于形成单晶铸造的方法包括将模具定位在冷却板上，模具包括单晶选择器，在模具中提供熔融的镍基超级合金组合物，熔融组合物包含大于约80ppm的硼（B） 用冷却板冷却熔融组合物，并通过从热源内取出模具形成单向温度梯度，以形成包括具有至少一个晶界的基本单晶微结构的单晶铸件。
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