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1. 发明申请

US20140048185A1 METHOD OF HEAT TREATING A CAST IRON, IN PARTICULAR A NODULAR CAST IRON 有权
标题翻译：一种特殊的铸铁加热处理方法
公开(公告)号：US20140048185A1
公开(公告)日：2014-02-20
申请号：US14004994
申请日：2012-03-13
申请人： Pieter Cornelis Van Eldijk , Abraham van Eldijk
发明人： Pieter Cornelis Van Eldijk , Abraham van Eldijk
IPC分类号： C21D5/00
CPC分类号： C21D5/00 , C21D8/00 , C21D8/005
摘要： The invention relates to a method of heat treating a cast iron having graphite particles, in particular a cast iron having graphite nodules with a substantially spherical geometry. The method comprises the step of subjecting the cast iron to a first austenitizing temperature, in order to obtain a cast iron having an austenite matrix with a substantially homogeneous carbon content. Subsequently, at least part of the cast iron is subjected to at least a second, different austenitizing temperature in order to change, in at least part of the cast iron, the carbon concentration in a part of the matrix surrounding the (spherical) geometry of the graphite particles. The method yields improved controllability on strength properties characteristics for cast irons including malleable irons, in particular for ductile iron.
摘要翻译：本发明涉及一种热处理具有石墨颗粒的铸铁的方法，特别是具有基本上球形几何形状的石墨结核的铸铁。该方法包括对铸铁进行第一奥氏体化温度的步骤，以获得具有基本均匀碳含量的奥氏体基体的铸铁。随后，铸铁的至少一部分经受至少第二个不同的奥氏体化温度，以便在铸铁的至少一部分中改变围绕（球形）几何形状的基体的一部分中的碳浓度石墨颗粒。该方法对于铸铁的强度性能特性提高了可控性，包括有韧性的铁，特别是球墨铸铁。

2. 发明授权

US09708677B2 Method of heat treating a cast iron, in particular a nodular cast iron 有权
公开(公告)号：US09708677B2
公开(公告)日：2017-07-18
申请号：US14004994
申请日：2012-03-13
申请人： Pieter Cornelis Van Eldijk , Abraham Van Eldijk
发明人： Pieter Cornelis Van Eldijk , Abraham Van Eldijk
IPC分类号： C21D5/00 , C21D8/00
CPC分类号： C21D5/00 , C21D8/00 , C21D8/005
摘要： The invention relates to a method of heat treating a cast iron having graphite particles, in particular a cast iron having graphite nodules with a substantially spherical geometry. The method comprises the step of subjecting the cast iron to a first austenitizing temperature, in order to obtain a cast iron having an austenite matrix with a substantially homogeneous carbon content. Subsequently, at least part of the cast iron is subjected to at least a second, different austenitizing temperature in order to change, in at least part of the cast iron, the carbon concentration in a part of the matrix surrounding the (spherical) geometry of the graphite particles. The method yields improved controllability on strength properties characteristics for cast irons including malleable irons, in particular for ductile iron.

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