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公开(公告)号：US20140224152A1
公开(公告)日：2014-08-14
申请号：US14343893
申请日：2012-09-10
IPC分类号： B22C1/10
摘要： According to the invention, by setting the linear thermal expansion amount when a mold made of a molding sand is heated from a room temperature to 1000° C. to be not more than 0.9%, and the ratio (D/d) between the diameter of a slump (D) and the diameter of a slump cone (d) in a slump test of the molding sand having a hardening agent kneaded to be not less than 1.65, a molding sand preferable for use in a mold produced using the self-hardening type of three dimensional laminate molding sand mold, having low thermal expansibility preventing occurrence of a veining defect, and capable of forming a large and complicated shape can be obtained.
摘要翻译： 根据本发明，通过将由型砂制成的模具从室温加热至1000℃而设定为不大于0.9％的直线热膨胀量，并且将直径 在具有捏合的硬化剂的型砂的坍落度试验中，坍落度（D）和坍落度圆锥体（d）的直径不小于1.65，优选用于使用自of生产的模具制造的模型砂， 可以获得具有防止发生脉动缺陷的低热膨胀性并且能够形成大而复杂形状的三维层压型砂模的硬化型。
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公开(公告)号：US09796015B2
公开(公告)日：2017-10-24
申请号：US14343893
申请日：2012-09-10
摘要： According to the invention, by setting the linear thermal expansion amount when a mold made of a molding sand is heated from a room temperature to 1000° C. to be not more than 0.9%, and the ratio (D/d) between the diameter of a slump (D) and the diameter of a slump cone (d) in a slump test of the molding sand having a hardening agent kneaded to be not less than 1.65, a molding sand preferable for use in a mold produced using the self-hardening type of three dimensional laminate molding sand mold, having low thermal expansibility preventing occurrence of a veining defect, and capable of forming a large and complicated shape can be obtained.
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公开(公告)号：US08286455B2
公开(公告)日：2012-10-16
申请号：US12281966
申请日：2007-01-15
IPC分类号： B21D17/04
摘要： A method of metal surface hardening treatment inducing transformation, in which transformation is induced in a surface interior of material as hardening treatment object by simple, rapid treatment utilizing a frictional heat under pressure without the occurrence of melt loss, quench crack, soft spot, deformation, etc. to thereby reform the structure of surface interior of material as hardening treatment object into a miniaturized martensitic structure. The method of surface hardening treatment comprised the steps of while rotating nearly cylindrical pressurization tool (2) at high velocity, pressing the bottom face thereof slightly into the surface of material as hardening treatment object (1) so as to attain application of given pressure, thereby generating a local frictional hear between the pressurization tool and the material as hardening treatment object; inducing transformation in the material as hardening treatment object at the locality having been exposed to the frictional heat; and when the surface of material as hardening treatment objent positioned in the vicinity of the pressurization tool starts to soften by the frictional heat, moving the pressurization tool.
摘要翻译： 一种金属表面硬化处理诱导转化的方法，其中通过在压力下利用摩擦热简单快速的处理，在材料的表面内部诱导转变，而不发生熔体损失，淬火裂纹，软点，变形 从而将作为硬化处理对象的材料的表面内部的结构改为小型马氏体结构。 表面硬化处理的方法包括以高速旋转大致圆柱形的加压工具（2）的步骤，将其底面略微压入材料的表面作为硬化处理对象（1），以实现给定的压力， 从而在加压工具和材料之间产生作为硬化处理对象的局部摩擦听觉; 引起材料中作为已经暴露于摩擦热的部位的硬化处理对象的转变; 并且当位于加压工具附近的作为硬化处理对象的材料的表面由摩擦热开始软化时，移动加压工具。
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公开(公告)号：US20090056404A1
公开(公告)日：2009-03-05
申请号：US12281966
申请日：2007-01-15
IPC分类号： B21D37/16
摘要： A method of metal surface hardening treatment inducing transformation, in which transformation is induced in a surface interior of material as hardening treatment object by simple, rapid treatment utilizing a frictional heat under pressure without the occurrence of melt loss, quench crack, soft spot, deformation, etc. to thereby reform the structure of surface interior of material as hardening treatment object into a miniaturized martensitic structure. The method of surface hardening treatment comprised the steps of while rotating nearly cylindrical pressurization tool (2) at high velocity, pressing the bottom face thereof slightly into the surface of material as hardening treatment object (1) so as to attain application of given pressure, thereby generating a local frictional hear between the pressurization tool and the material as hardening treatment object; inducing transformation in the material as hardening treatment object at the locality having been exposed to the frictional heat; and when the surface of material as hardening treatment objent positioned in the vicinity of the pressurization tool starts to soften by the frictional heat, moving the pressurization tool.
摘要翻译： 一种金属表面硬化处理诱导转化的方法，其中通过在压力下利用摩擦热简单快速的处理，在材料的表面内部诱导转变，而不发生熔体损失，淬火裂纹，软点，变形 从而将作为硬化处理对象的材料的表面内部的结构改为小型马氏体结构。 表面硬化处理的方法包括以高速旋转大致圆柱形的加压工具（2）的步骤，将其底面略微压入材料的表面作为硬化处理对象（1），以实现给定的压力， 从而在加压工具和材料之间产生作为硬化处理对象的局部摩擦听觉; 引起材料中作为已经暴露于摩擦热的部位的硬化处理对象的转变; 并且当位于加压工具附近的作为硬化处理对象的材料的表面由摩擦热开始软化时，移动加压工具。
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