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12 条记录 (耗时 0.185 秒)

    VERFAHREN UND VORRICHTUNG ZUM RANDSCHICHTHÄRTEN FORMKOMPLIZIERTER BAUTEILE
    3.
    发明公开
    VERFAHREN UND VORRICHTUNG ZUM RANDSCHICHTHÄRTEN FORMKOMPLIZIERTER BAUTEILE 审中-公开
    方法和设备表面硬化FORM复杂的部件

    公开(公告)号：EP2087141A1

    公开(公告)日：2009-08-12

    申请号：EP07818860.4

    申请日：2007-10-10

    申请人： Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung e.V.

    发明人： BRENNER, Berndt ,  BONSS, Steffen ,  TIETZ, Frank ,  SEIFERT, Marko ,  HANNWEBER, Jan ,  KÜHN, Stefan ,  KARSUNKE, Udo

    IPC分类号： C21D1/09 ,  C21D10/00

    CPC分类号： C21D1/09 ,  C21D10/00 ,  C21D10/005 ,  C21D11/00

    摘要： The invention relates to the hardening of the surface layer of parts of machines, plants and apparatuses and also tools. Objects for which the application is possible and advantageous are components which are subjected to severe fatigue or wear stresses and are composed of hardenable steels and have a complicated shape and whose surface has to be hardened selectively on the functional surfaces or whose functional surface has a multidimensional shape. The process for hardening the surface layer of components having a complicated shape is carried out by means of a plurality of energy input zones. According to the invention, it is characterized in that the energy input zones are conducted on different curved parts separately in space and time and by means of cooperatively working transport systems so that superposition of the individual temperature fields forms a uniform temperature field which completely covers the functional surface of the component and within which each surface element of the later hardening zone of the component attains the selected austenite formation temperature interval ΔTa at least once and the time interval Δt between the maximum temperatures Tmaxn of the individual temperature fields is from 3.1 to 3.n smaller than the time ΔtmS which is required to go below the martensite start temperature MS during the cooling phase. The apparatus by means of which the process of the invention can be carried out is, according to the invention, characterized in that the energy configuring units are connected to one or more energy sources for optical or electromagnetic radiation and are each fixed to separate but cooperatively operating transport systems.

    VERSCHLEISSBESTÄNDIGE NOCKENWELLE UND VERFAHREN ZU IHRER HERSTELLUNG
    7.
    发明公开
    VERSCHLEISSBESTÄNDIGE NOCKENWELLE UND VERFAHREN ZU IHRER HERSTELLUNG 失效
    穿凸轮轴及其制造方法

    公开(公告)号：EP0925377A1

    公开(公告)日：1999-06-30

    申请号：EP97943775.0

    申请日：1997-09-12

    申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.

    发明人： BRENNER, Berndt ,  WETZIG, Andreas ,  NAUNAPPER, Dietmar ,  DUSCHEK, Carsten

    IPC分类号： C21D1 ,  C21D5 ,  C21D9 ,  F01L1

    CPC分类号： F01L1/047 ,  C21D1/09 ,  C21D5/00 ,  C21D9/30 ,  C21D2211/007 ,  Y10S148/902

    摘要： The invention concerns a wear-resistant camshaft and a method of producing the same. Objects to which the invention is advantageously applicable include all cast-iron parts which are subject to wear as a result of lubricated friction. The wear-resistant camshaft consists of cast-iron and comprises a surface layer consisting of a ledeburitic recast layer with a high cementite portion and, lying therebelow, a martensitic hardening zone. According to the invention, the recast layer consists of finely dispersed ledeburitic cementite with thicknesses of ≤ 0.1 νm and a metallic matrix comprising a phase mixture of martensite and/or bainite, residual austenite and less than 20 % finely laminated perlite with a distance of ≤ 0.1 νm between the laminations. The hardening layer is formed from a phase mixture of martensite and/or bainite, partially dissolved perlite and residual austenite. This wear-resistant camshaft according to the invention is produced by means of a high-energy surface recasting method.

    VERFAHREN UND VORRICHTUNG ZUM RISSFREIEN SCHWEIßEN, REPARATURSCHWEIßEN ODER AUFTRAGSSCHWEIßEN HEIßRISSANFÄLLIGER WERKSTOFFE
    9.
    发明公开
    VERFAHREN UND VORRICHTUNG ZUM RISSFREIEN SCHWEIßEN, REPARATURSCHWEIßEN ODER AUFTRAGSSCHWEIßEN HEIßRISSANFÄLLIGER WERKSTOFFE 有权
    VERFAHREN ZUM RISSFREIEN SCHWEISSEN，REPARATURSCHWEISSEN ODER AUFTRAGSSCHWEISSENHEISSRISSANFÄLLIGERWERKSTOFFE

    公开(公告)号：EP2076615A2

    公开(公告)日：2009-07-08

    申请号：EP07818859.6

    申请日：2007-10-10

    申请人： Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung e.V.

    发明人： BRENNER, Berndt ,  GÖBEL, Gunther

    IPC分类号： C21D9/50 ,  B23K9/23 ,  B23K9/235 ,  B23K15/00 ,  B23K26/32 ,  B23K26/42

    CPC分类号： B23K9/235 ,  B23K9/23 ,  B23K15/0033 ,  B23K15/0093 ,  B23K20/1275 ,  B23K20/128 ,  B23K26/32 ,  B23K26/323 ,  B23K26/60 ,  B23K2201/18 ,  B23K2203/04 ,  B23K2203/05 ,  B23K2203/08 ,  B23K2203/10 ,  B23K2203/26 ,  B23K2203/50 ,  B23P6/005 ,  C21D9/50 ,  F01D5/005 ,  F05D2230/232

    摘要： The invention relates to a method and a device for the crack-free welding, repair welding, or surface welding of metallic parts made of materials that are prone to forming hot cracks. Objects on which said method and device can be efficiently and advantageously used include all parts made of alloys that freeze in several phases and have a large freezing interval or alloys that contain alloying elements or impurity elements which form a low-melting eutectic mixture with one or more main alloying elements and are to be joined by means of a fusion welding process at high power density. In the method according to the invention, a temperature is locally applied in a following manner by two parallel or nearly parallel temperature fields which extend along the welding direction, are electromagnetically generated by means of a volume energy source inside the parts, both begin in front of the welding zone in the welding direction, and of which the maximum temperatures are reached outside the heat affected zone and behind the freezing zone in the welding direction. The depth of the temperature fields at the maximum temperature point is at least as low as the depth of the weld. The additional energy source in the device according to the invention is a volume energy source, is connected to the welding head, and follows the movement of the welding head.

    摘要翻译： 本发明涉及易受热裂纹的金属材料的无裂纹焊接，修补焊接或堆积焊接的方法和装置。 其应用是有利和有利的对象都是包括具有宽的凝固间隔的多相凝固合金或由含有合金元素或污染元素的合金构成的组分，所述合金元素或污染元素形成具有一个或多个主合金的低熔点共晶材料 元件，并且使用高功率密度的熔焊方法来连接。 在根据本发明的方法中，行进局部温度施加是通过两个电磁温度场进行的，两个电磁温度场平行或几乎平行于两侧的焊接方向并且纵向延伸到焊接方向，由体积能量源 在部件内部，从焊接方向观察的焊接区域前面的两个温度场和其最大值的温度位于热影响区域的外侧，并且在焊接方向上位于凝固区的后方，温度场的深度在 在最高温度的位置至少达到焊缝深度。 在根据本发明的装置中，辅助能量源是体积能量源，并且连接到焊接头并跟随焊接头的移动。