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1. 发明申请

WO1997019200A1 IMPROVED METHOD FOR OPTIMIZATION OF THE GRAIN REFINEMENT OF ALUMINIUM ALLOYS 审中-公开
标题翻译：改进铝合金精制的改进方法
公开(公告)号：WO1997019200A1
公开(公告)日：1997-05-29
申请号：PCT/SE1996001517
申请日：1996-11-21
申请人： OPTICAST AB , BÄCKERUD, Stig, Lennart , JOHNSSON, Mats , SIGWORTH, Geoffrey
发明人： OPTICAST AB
IPC分类号： C22C01/02
CPC分类号： C22C1/026 , C22C1/03
摘要： The invention is a method of controlling the grain refinement of certain aluminium alloys. The grain sizes for different values of the grain growth index, GGI, are determined for the used casting method. The GGI is represented by the sum of m(k - 1) value multiplied with the concentration for every element in the aluminium alloy. If the value for a certain alloy is compared with known relations between the m(k - 1) value and the grain size the composition of the alloy melt is amended to an optimum grain size by adding a grain size affecting agent. The method can be further improved by optimising the amount of nucleating agent.
摘要翻译：本发明是控制某些铝合金的晶粒细化的方法。对于铸造方法，确定不同晶粒生长指数值GGI的晶粒尺寸。 GGI由与铝合金中的每个元素的浓度乘以m（k-1）值的和表示。如果将某种合金的值与m（k-1）值和晶粒尺寸之间的已知关系进行比较，则通过加入晶粒尺寸影响剂将合金熔体的组成修改为最佳晶粒尺寸。通过优化成核剂的量可以进一步改善该方法。

2. 发明申请

WO1997013882A1 A METHOD OF REDUCING THE FORMATION OF PRIMARY PLATLET-SHAPED BETA-PHASE IN IRON CONTAINING AlSi-ALLOYS, IN PARTICULAR IN Al-Si-Mn-Fe ALLOYS 审中-公开
标题翻译：在Al-Si-Mn-Fe合金中，特别是减少含有AlSi合金的铁中初级平板形成BETA相的形成的方法
公开(公告)号：WO1997013882A1
公开(公告)日：1997-04-17
申请号：PCT/SE1996001254
申请日：1996-10-09
申请人： OPTICAST AB , BÄCKERUD, Lennart , ARNBERG, Lars , CHAI, Guocai
发明人： OPTICAST AB
IPC分类号： C22C01/02
CPC分类号： C22C21/02 , C22C21/04
摘要： Iron is a detrimental impurity in aluminium alloys since it causes hard and brittle iron-rich intermetallic phases to precipitate during solidification. The most detrimental phase in the microstructure is the beta-phase of the Al5FeSi-type because it is platelet-shaped. The present invention provides a method of producing iron-containing Al-alloys free from platelet-shaped beta-phase by controlling and regulating the precipitation path during solidification such that the precipitation of Fe containing intermetallic phases starts with the precipitation of the hexagonal phase of the Al8Fe2Si-type. The presence of the Al8Fe2Si-type phase result in that beta-phase will not develop the common platlet-morphology but nucleate on and cover the Al8Fe2Si-type phase which in turn has a less harmful morphology. Furthermore, the invention defines the use of thermal analysis as a means for controlling the morphology of the precipitates.
摘要翻译：铁是铝合金中的有害杂质，因为它在固化过程中会导致富铁脆性金属相析出。微结构中最有害的相是Al5FeSi型的β相，因为它是血小板形的。本发明提供了一种通过控制和调节凝固过程中的沉淀路径来生产不含血小板形β相的含铁Al合金的方法，使得含Fe金属间相的析出开始于六方相析出 Al8Fe2Si型。 Al8Fe2Si型相的存在导致β相不会形成共同的板状形态，而是在Al8Fe2Si型相上成核并覆盖Al8Fe2Si型相，而Al8Fe2Si型相又具有较小的有害形态。此外，本发明定义了使用热分析作为控制沉淀物形态的手段。

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