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1.发明授权
公开(公告)号：EP2140042B1
公开(公告)日：2020-04-22
申请号：EP08701169.8
申请日：2008-01-19
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公开(公告)号：EP2160267A1
公开(公告)日：2010-03-10
申请号：EP08749125.4
申请日：2008-04-25
CPC分类号： C21D1/09 , C21D1/10 , C21D9/0068 , C22F1/04 , F02B23/0603 , Y02P10/253 , Y02T10/125
摘要： The invention relates to a method for producing pistons (1) that can be used in internal combustion engines from lightweight metal, with a combustion bowl (3) assigned to one piston head (2), wherein a bowl rim (4) is subjected to a melt treatment. For this purpose, in a first method step the bowl rim (4) is inductively heated. In a second method step, the material of the bowl rim (4), also to be referred to as the delimiting zone, is improved by means of a laser beam.
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3.发明授权
公开(公告)号：EP1060048B1
公开(公告)日：2004-06-16
申请号：EP99907603.7
申请日：1999-03-05
摘要： The invention relates to a method for casting a molten mass at a relatively low solidification rate, such as, in particular, gravity chill-cast methods, sand casting methods, low pressure casting methods or intermediate forms of these methods, whereby the molten mass has phases, such as the presettling of crystals, particles or short fibers, having a lower conductibility of electricity than the metal of the remaining molten mass. In order to obtain surface areas which are resistant to wear, the invention provides that the molten mass is solidified by at least the local effect of an electromagnetic alternating field and that, in the course of this, the electromagnetic alternating field penetrates into a surface area with a penetration depth according to the frequency of the alternating field and to the conductibility of the molten mass. As a result, the phases with lower conductibilities are enhanced on these surface areas of the cast part.
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4.发明公开
公开(公告)号：EP1060048A1
公开(公告)日：2000-12-20
申请号：EP99907603.7
申请日：1999-03-05
摘要： The invention relates to a method for casting a molten mass at a relatively low solidification rate, such as, in particular, gravity chill-cast methods, sand casting methods, low pressure casting methods or intermediate forms of these methods, whereby the molten mass has phases, such as the presettling of crystals, particles or short fibers, having a lower conductibility of electricity than the metal of the remaining molten mass. In order to obtain surface areas which are resistant to wear, the invention provides that the molten mass is solidified by at least the local effect of an electromagnetic alternating field and that, in the course of this, the electromagnetic alternating field penetrates into a surface area with a penetration depth according to the frequency of the alternating field and to the conductibility of the molten mass. As a result, the phases with lower conductibilities are enhanced on these surface areas of the cast part.
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5.发明公开
公开(公告)号：EP3008317A1
公开(公告)日：2016-04-20
申请号：EP14732527.8
申请日：2014-06-13
CPC分类号： F02F3/12 , B05D1/18 , C23C4/08 , C23C4/11 , C23C8/14 , C23C8/18 , C23C14/081 , C23C14/085 , C23C14/16 , C23C14/24 , C23C16/06 , C23C16/403 , C23C16/406 , C25D11/34 , F02F3/14
摘要： The invention relates to a piston (1), especially a steel piston for an internal combustion engine, comprising a piston head (2) which forms part of a combustion chamber (3), at least the piston head (2) having an oxidation protection layer. The invention further relates to a method for producing an oxidation protection layer.
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公开(公告)号：EP2190620A1
公开(公告)日：2010-06-02
申请号：EP08802633.1
申请日：2008-09-25
CPC分类号： B23K10/027 , B23K9/048 , B23K26/32 , B23K26/34 , B23K35/302 , B23K35/3053 , B23K2203/02 , B23K2203/08 , B23K2203/10 , B23K2203/12 , B23K2203/18 , B23K2203/50 , C21D1/08 , C21D1/09 , C21D9/0068 , C21D9/40
摘要： The invention relates to a method for reinforcing at least one annular groove of a piston for an internal combustion engine. In said method, after producing a piston blank, a heterogeneous structure is homogenized using a refusion process in the zone of the annular groove that is to be introduced, and alloying additions are fused with the help of a source of heat in said first step of the refusion process and are thus added in the zone that is to be reinforced. According to the invention, the structure that is already partially homogenized is again superficially fused in another step with the help of the source of heat, but without adding any alloying additions.
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7.发明公开ERZEUGUNG EINES PARTIELLEN FASERVERBUNDGEFÜGES IN EINEM BAUTEIL ÜBER EINE LASERUMSCHMELZBEHANDLUNG 审中-公开EZEUGUNG EINES PARTIELLENFASERVERBUNDGEFÜGESIN EINEM BAUTEILÜBEREINE LASERUMSCHMELZBEHANDLUNG
公开(公告)号：EP2140042A1
公开(公告)日：2010-01-06
申请号：EP08701169.8
申请日：2008-01-19
CPC分类号： C23C24/10 , B22F2999/00 , B23K13/01 , B23K26/0006 , B23K26/144 , B23K26/32 , B23K26/34 , B23K26/354 , B23K35/005 , B23K35/0244 , B23K35/327 , B23K35/3602 , B23K2103/02 , B23K2103/06 , B23K2103/08 , B23K2103/10 , B23K2103/12 , B23K2103/26 , B23K2103/50 , B23K2103/52 , C21D1/09 , C21D1/10 , C21D9/0068 , C22C1/1094 , C22C32/00 , C22C47/16 , Y02P10/253 , B22F2202/11 , B22F2207/01
摘要： The invention relates to a method for producing a hardened surface of a component made of a metal material and a component hardened according to said method. According to the invention, at least part of the surface of the component is melted by supplying energy after the component has been cast. An auxiliary material is added to the melt thus obtained and the solidification of the melt with the auxiliary material is awaited such that the surface of the component is subsequently hardened in said region.
摘要翻译： 本发明涉及一种用于制造由金属材料制成的部件的硬化表面的方法和根据所述方法硬化的部件。 根据本发明，组件的表面的至少一部分在组件铸造之后通过供应能量而熔化。 将辅助材料加入到如此获得的熔体中，并且等待熔融物与辅助材料的凝固，使得部件的表面随后在所述区域中硬化。
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公开(公告)号：EP2160267B1
公开(公告)日：2011-09-21
申请号：EP08749125.4
申请日：2008-04-25
CPC分类号： C21D1/09 , C21D1/10 , C21D9/0068 , C22F1/04 , F02B23/0603 , Y02P10/253 , Y02T10/125
摘要： The invention relates to a method for producing pistons (1) that can be used in internal combustion engines from lightweight metal, with a combustion bowl (3) assigned to one piston head (2), wherein a bowl rim (4) is subjected to a melt treatment. For this purpose, in a first method step the bowl rim (4) is inductively heated. In a second method step, the material of the bowl rim (4), also to be referred to as the delimiting zone, is improved by means of a laser beam.
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