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公开(公告)号：US5972521A
公开(公告)日：1999-10-26
申请号：US164781
申请日：1998-10-01
CPC分类号： B22F7/006 , B32B15/01 , B22F2003/1128 , B22F2999/00 , Y10T29/4998 , Y10T29/49993 , Y10T428/12021
摘要： The present invention provides a method of forming a continuous one-piece structural porous metal (SPM) structure having a predetermined geometry. The method the invention includes the steps of preparing a metal billet comprising a metal core formed of a metal and a gas, and solid metal face sheets bonded to opposite sides of the metal core; placing the metal billet in a mold cavity having a predetermined geometry defined by opposing inner surfaces of the mold with at least one of the opposing inner surfaces contacting at least a portion of the metal billet and spaced apart from at least a portion of the metal billet; and heating the metal billet to expand the metal core to form the expanded metal structure. The portion of the metal billet in contact with the inner surfaces of the mold cavity is constrained by these surfaces while the remainder of the metal billet that is spaced apart from at least one of the inner surfaces of the mold is allowed to expand resulting in a one-piece expanded metal structure having a geometry corresponding generally to the geometry of the mold cavity with the constrained portion of the metal structure having a higher density than the remainder of the expanded metal structure. The present invention also includes a continuous one-piece expanded metal structure.
摘要翻译： 本发明提供一种形成具有预定几何形状的连续一体结构多孔金属（SPM）结构的方法。 本发明的方法包括制备金属坯料的步骤，金属坯料由金属和气体形成的金属芯和与金属芯的相对侧粘结的固体金属表面片; 将金属坯料放置在具有由模具的相对内表面限定的预定几何形状的模腔中，其中至少一个相对的内表面接触金属坯料的至少一部分并与金属坯料的至少一部分间隔开 ; 并加热金属坯料以使金属芯膨胀以形成膨胀金属结构。 与模具腔的内表面接触的金属坯料部分被这些表面约束，而与模具的至少一个内表面间隔的金属坯料的其余部分被允许膨胀，从而导致 一体式金属结构具有几何形状对应于模腔的几何形状，其中金属结构的约束部分具有比其余的膨胀金属结构更高的密度。 本发明还包括一个连续的单件膨胀金属结构。
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公开(公告)号：US06168072A
公开(公告)日：2001-01-02
申请号：US09176424
申请日：1998-10-21
IPC分类号： B23K2000
CPC分类号： B23K20/023 , B23K35/383 , B23K2103/14
摘要： The present invention provides a method of diffusion bonding a first article containing a thermally activated expansion agent to a second article. The first article and the second article are placed adjacent to each other at a bonding area. The first article and the second article are constrained such that contact is maintained between the first article and the second article at the bonding area. The constrained articles are then heated at a temperature that causes the first article to expand, creating pressure between the articles at the bonding area.
摘要翻译： 本发明提供了将包含热活化膨胀剂的第一制品扩散粘合到第二制品的方法。 第一制品和第二制品在粘合区域彼此相邻放置。 第一制品和第二制品受到限制，使得在粘合区域处在第一制品和第二制品之间保持接触。 然后将约束制品在导致第一制品膨胀的温度下加热，在粘合区域处在制品之间产生压力。
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3.发明授权Pressure bonding and densification process for manufacturing low density core metal parts 失效用于制造低密度芯金属零件的压接和致密化工艺
公开(公告)号：US6085965A
公开(公告)日：2000-07-11
申请号：US794835
申请日：1997-02-04
IPC分类号： B22F7/00 , B23K20/02 , B23K20/233 , B32B15/01
CPC分类号： B32B15/016 , B22F7/006 , B23K20/02 , B23K20/2336 , B22F2998/10
摘要： A novel method of forming low density core metal parts by pressure bonding face sheets to a porous foam metal core and simultaneously densifying the core is disclosed. In particular, low density core aluminum and aluminum alloy parts can be formed according to the method of the invention. The method of forming low density core metal parts generally comprises the steps of providing a porous, foam metal core and simultaneously pressure bonding first and second solid metal face sheets directly to opposite sides of the core and densifying the core by applying heat and uniaxial forge pressure to the first and second face sheets and to the core for a predetermined period of time. The method of the invention can therefore produce LDC parts having a predetermined shape and density. Furthermore, the LDC parts are less subject to interfacial oxidation and delamination than conventional LDC parts made by brazing.
摘要翻译： 公开了一种通过将面片压接到多孔泡沫金属芯并同时致密的芯来形成低密度芯金属部件的新方法。 特别地，可以根据本发明的方法形成低密度芯铝和铝合金部件。 形成低密度芯金属部件的方法通常包括以下步骤：提供多孔的泡沫金属芯，同时将第一和第二固体金属表面片材直接压在芯的相对侧并通过施加热和单轴锻造压力来使芯体致密化 到第一和第二面板和芯部预定的时间段。 因此，本发明的方法可以生产具有预定形状和密度的LDC部件。 此外，与通过钎焊制成的常规LDC部件相比，LDC部件较少受到界面氧化和分层的影响。
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4.发明授权Two-step brazing process for joining materials with different coefficients of thermal expansion 失效用于连接具有不同热膨胀系数的材料的两步钎焊工艺
公开(公告)号：US5855313A
公开(公告)日：1999-01-05
申请号：US835257
申请日：1997-04-08
CPC分类号： B23K1/0012 , B23K1/19 , F28F21/02
摘要： A two-step process for joining a first part to a second part, the first part having a coefficient of thermal expansion lower than the coefficient of thermal expansion of the second part. An anchor layer is then brazed at a lower temperature to the first part having a high thermal expansion coefficient. The anchor layer has a thickness such that upon cooling it will yield to relieve stress build up resulting from the differing thermal expansion coefficients between it and the first part. The anchor layer is then brazed to the part having a high thermal expansion coefficient. The process is particularly useful for joining carbon-carbon composite parts to copper substrates for use in the manufacture of high temperature heat exchangers as used, for example, in nuclear fusion reactors.
摘要翻译： 一种用于将第一部分接合到第二部分的两步法，第一部分的热膨胀系数低于第二部分的热膨胀系数。 然后将锚固层在较低温度下钎焊到具有高热膨胀系数的第一部分。 锚固层具有这样的厚度，使得在冷却时，它将屈服以减轻由于其与第一部分之间的不同热膨胀系数导致的应力积累。 然后将锚定层钎焊到具有高热膨胀系数的部分。 该方法特别适用于将碳 - 碳复合材料部件接合到例如在核聚变反应器中使用的用于制造高温热交换器的铜基板上。
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