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公开(公告)号：US06299690B1
公开(公告)日：2001-10-09
申请号：US09442411
申请日：1999-11-18
IPC分类号： B05B512
CPC分类号： B30B15/0011 , B22F3/03 , B22F2999/00 , B30B15/0017 , B22F2003/026 , B22F2202/06
摘要： A method of lubricating the wall surfaces of a die cavity used in powder metallurgy involves spraying the wall surfaces with tribocharged particles of a lubricant material. The method is carried out by means of an apparatus centered about a plug member which has a three-dimensional shape conforming generally to that of the article to be formed. The plug member is slightly smaller than the article so that when the plug member is inserted into the die cavity there is a small, but uniform, gap created between the outer wall surfaces of the plug member and the walls of the die cavity. The plug member is secured to a closing plate which can be inserted into the die cavity so as to be sealed therewith. The closing plate is provided with vent holes and the plug member has a plurality of spaced apart tubes extending therethrough, which tubes exit at one or more of the wall surfaces of the plug member. The lubricant material is fed using an inert gas under pressure through tubing which tribocharged the lubricant particles and the tribocharged particles are sprayed from the tubes in the plug member into the gap so that they are electrostatically attracted to the walls of the die cavity and adhere thereto. Any excess gas and lubricant exits the gap through the vent holes in the closing plate. A uniform thin coating of lubricant is created on the walls of the die cavity. The green density of the article formed in the die is greater, and the ejection force required to remove the formed article from the die cavity is less, than with existing methods and apparatus.
摘要翻译： 用于粉末冶金中使用的模腔的壁表面润滑的方法包括用滑动摩擦的润滑剂材料的颗粒喷洒壁表面。 该方法通过围绕具有与要形成的制品的立体形状一致的三维形状的塞子构件的装置进行。 插头构件比制品稍小，使得当插头构件插入模腔中时，在插塞构件的外壁表面和模腔的壁之间产生小而均匀的间隙。 插头构件被固定到可以插入模腔中以与其密封的封闭板。 封闭板设置有通气孔，并且插塞构件具有延伸穿过其中的多个间隔开的管，该管在插塞构件的一个或多个壁表面处离开。 润滑剂材料在加压下通过管道将惰性气体进料，该管道摩擦了润滑剂颗粒，并且将摩擦电荷的颗粒从插塞构件中的管道喷射到间隙中，使得它们被静电吸引到模腔的壁并粘附到其上 。 任何多余的气体和润滑剂通过封闭板上的通气孔离开间隙。 在模腔的壁上产生均匀的薄涂层润滑剂。 在模具中形成的制品的生坯密度更大，与现有的方法和装置相比，从模腔移出成形制品所需的喷射力较小。
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公开(公告)号：US5976456A
公开(公告)日：1999-11-02
申请号：US264689
申请日：1999-03-09
CPC分类号： B22F1/0085 , B22F2003/026 , B22F2998/10 , B22F2999/00
摘要： This invention relates to a method for producing sintered parts of aluminum or aluminum alloy with improved mechanical properties using batch degassing, die compaction and liquid phase sintering. The batch degassing consists of holding a prealloyed aluminum powder at a temperature of about 350.degree. to about 450.degree. C. in a stainless steel autoclave in which the pressure is reduced to less than 5.times.10.sup.-6 torr. Once the desired pressure is reached the powder is cooled down within the autoclave while still under vacuum. The resulting powder is then compacted at a pressure of 20 to 50 tsi at between room temperature and about 250.degree. C., but preferably at a warm temperature of about 65.degree. C. The final densification is completed by liquid phase sintering in argon atmosphere at 625.degree. C. This method allows the production of sintered compacts characterized by a density close to 97% of theoretical, which makes it possible to eliminate the need for a hot working step.
摘要翻译： 本发明涉及使用间歇脱气，压模和液相烧结来改善机械性能的铝或铝合金烧结体的制造方法。 间歇脱气包括在约350至约450℃的温度下保持在不锈钢高压釜中的预合金铝粉末，其中压力降低至小于5×10 -6乇。 一旦达到所需的压力，粉末在仍然在真空下在高压釜内冷却。 然后将所得粉末在室温至约250℃之间的压力下压制成20至50tsi，但优选在约65℃的温度下进行压实。最终致密化通过在氩气气氛中液相烧结来完成 625℃。该方法允许生产密度接近理论值的97％的烧结体，这使得可以消除对热加工步骤的需要。
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3.发明授权
公开(公告)号：US5432223A
公开(公告)日：1995-07-11
申请号：US291524
申请日：1994-08-16
IPC分类号： B22F1/00 , C08K3/08 , C08K5/3415 , C22C1/00
CPC分类号： B22F1/0059 , B22F2998/00
摘要： A novel high-performance binder system is provided for the fabrication of segregation-free iron based powder blends. The blends are prepared by using a binder system comprising thermoplastic resin polyvinylpyrrolidone and a suitable compatible plasticizer such as polyethylene glycol, and optional solid lubricants. The binder system enables the manufacture of segregation-free iron-based powder blends with high flow rate and compressibility, enhanced apparent density, green strength and transverse rupture strength, and low dimensional variations compared to unbonded powder blends and to blends made with PVP or PEG only as the binder.
摘要翻译： 提供了一种新型的高性能粘合剂体系，用于制造无分离铁基粉末混合物。 通过使用包含热塑性树脂聚乙烯吡咯烷酮和合适的相容增塑剂如聚乙二醇和任选的固体润滑剂的粘合剂体系来制备共混物。 粘合剂系统使得能够制造与无粘合粉末混合物相比具有高流速和压缩性，增强的表观密度，生坯强度和横向断裂强度以及低维度变化的无偏析铁基粉末混合物以及与PVP或PEG制成的共混物 只作为粘合剂。
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4.发明申请Method and apparatus for generating IP traffic in an internet protocol (IP) based network 审中-公开用于在基于因特网协议（IP）的网络中生成IP流量的方法和装置公开(公告)号：US20070147357A1
公开(公告)日：2007-06-28
申请号：US11316932
申请日：2005-12-27
IPC分类号： H04L12/66
CPC分类号： H04L41/145 , H04L12/2856
摘要： A method for having a computer-based node for simulating requests for Internet Protocol (IP) services for a group of IP terminal in an IP network. The method obtains at the computer-based node a test scenario from a memory, generates a computer medium based on the test scenario, reads computer readable medium stored at a persistent memory of the computer-based node, executes at the computer-based node instructions of the computer readable medium. The method further negotiates at the computer-based node a PPP connection for each IP terminal of the group of IP terminals and establishes at the computer-based node the PPP connection for each IP terminal of the group of IP terminals. Subsequently, the method sends from the computer-based node to a service switch a command for each IP terminal of the group of IP terminals and receives at the computer-based node responses from the service switch, wherein the responses include an indicator for indicating if a command is successful.
摘要翻译： 一种用于模拟IP网络中的一组IP终端的因特网协议（IP）服务请求的基于计算机的节点的方法。 该方法在基于计算机的节点处从存储器获得测试场景，基于测试场景生成计算机介质，读取存储在基于计算机的节点的持久存储器上的计算机可读介质，在基于计算机的节点指令 的计算机可读介质。 该方法进一步在基于计算机的节点处协商IP终端的每个IP终端的PPP连接，并在基于计算机的节点上建立IP终端组的每个IP终端的PPP连接。 随后，该方法从基于计算机的节点向服务交换机发送一个IP终端组的每个IP终端的命令，并在基于计算机的节点从服务交换机接收响应，其中响应包括用于指示是否 一个命令是成功的。
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5.发明授权公开(公告)号：US06331270B1
公开(公告)日：2001-12-18
申请号：US09322178
申请日：1999-05-28
IPC分类号： B22F312
CPC分类号： H01F41/0246 , B22F3/02 , B22F3/26 , B22F2003/023 , B22F2003/248 , B22F2998/10 , H01F1/22 , H01F1/24 , B22F3/24
摘要： Near-net-shape soft magnetic components can be produced from iron powder lubricant compositions using powder metallurgy techniques. The resulting components have isotropic magnetic and thermal properties and may be shaped into complex geometry using conventional compaction techniques. A non-coated ferromagnetic powder is mixed with a lubricant and compacted. After compaction, the components are thermally treated at a moderate temperature to burn out the lubricant, relieve the stresses induced during pressing and reduce the hysteresis losses. Depending on the application, the properties of the material may be tailored by varying the content and type of the lubricant and the thermal treatment conditions.
摘要翻译： 可以使用粉末冶金技术由铁粉润滑剂组合物制造近网状软磁组件。 所得到的组分具有各向同性的磁性和热性质，并且可以使用常规的压实技术成型为复杂的几何形状。 将未涂覆的铁磁粉末与润滑剂混合并压实。 压实后，在中等温度下对组分进行热处理以烧尽润滑剂，减轻压制过程中产生的应力，减少滞后损失。 根据应用，可以通过改变润滑剂的含量和类型以及热处理条件来调整材料的性能。
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6.发明授权
公开(公告)号：US6140278A
公开(公告)日：2000-10-31
申请号：US186196
申请日：1998-11-04
IPC分类号： B22F1/00 , C10M111/04
CPC分类号： B22F1/0077 , B22F1/0059 , B22F2003/023 , B22F2003/145 , B22F2998/00
摘要： Metal powder compositions for powder metallurgy (P/M) applications contain a high-density polyethylene as a lubricant. The compositions are suitable for either cold or warm compaction. When compacted, the compositions yield parts having relatively high density, high green strength and good surface finish.
摘要翻译： 用于粉末冶金（P / M）应用的金属粉末组合物含有高密度聚乙烯作为润滑剂。 该组合物适用于冷或热压实。 当压实时，组合物产生具有较高密度，高生坯强度和良好表面光洁度的部件。
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7.发明授权Composite insulating coatings for powders, especially for magnetic applications 失效用于粉末的复合绝缘涂层，特别适用于磁性应用
公开(公告)号：US5798439A
公开(公告)日：1998-08-25
申请号：US686610
申请日：1996-07-26
摘要： A method for producing composite insulating coatings on powder particles, the coatings containing an electrically insulating metal compound and an organic polymer. The coatings are deposited preferably by controlled spraying, simultaneous or sequential, of sol precursors of insulating metal compounds and polymer emulsions or solutions onto polymer, metal or ceramic powder particles preferably during the blending or mixing of the particles. The process is useful for mass production of coated iron-based powders used for shaping components by powder metallurgy techniques for magnetic applications. Coated iron based powders can be cold or warm pressed and heat treated to obtain the desired mechanical properties.
摘要翻译： 一种在粉末颗粒上生产复合绝缘涂层的方法，所述涂层含有电绝缘金属化合物和有机聚合物。 优选通过将绝缘金属化合物和聚合物乳液或溶液的溶胶前体同时或顺序地控制喷射到聚合物，金属或陶瓷粉末颗粒上，优选在颗粒的混合或混合期间沉积涂层。 该方法可用于通过用于磁性应用的粉末冶金技术大量生产用于成型组分的涂覆铁基粉末。 涂覆铁基粉末可以是冷的或热压的并且被热处理以获得所需的机械性能。
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公开(公告)号：US06548012B2
公开(公告)日：2003-04-15
申请号：US09846216
申请日：2001-05-02
IPC分类号： B22F326
CPC分类号： B22F3/02 , B22F3/26 , B22F2003/023 , B22F2003/248 , B22F2998/10 , H01F1/22 , H01F1/24 , H01F1/26 , H01F41/0246 , B22F3/24
摘要： Near-net-shape soft magnetic components can be produced from iron powder-lubricant compositions using powder metallurgy techniques. The resulting components have isotropic magnetic and thermal properties and may be shaped into complex geometry using conventional compaction techniques. A non-coated ferromagnetic powder is mixed with a lubricant and compacted. After compaction, the components are thermally treated at a moderate temperature to burn out the lubricant, and possibly also relieve the stresses induced during pressing and reduce the hysteresis losses. Depending on the application, the properties of the material may be tailored by varying the content and type of the lubricant and the thermal treatment conditions.
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9.发明授权
公开(公告)号：US5993729A
公开(公告)日：1999-11-30
申请号：US796564
申请日：1997-02-06
CPC分类号： C22C1/10 , H01F41/0246 , B22F2998/10
摘要： Post-compaction treatments of iron compacts to improve the mechanical strength of the compacts are provided. Powder is compacted into the desired part. The part is then subjected to a strengthening operation. This operation involves a heat treatment at a moderate temperature combined with an optional resin impregnation. The heat treatment is done at a temperature sufficient to increase the mechanical properties of the compact while maintaining the magnetic losses low for the required application. Impregnation with an insulating binder can be effected to increase the mechanical strength of the part without creating electric contacts between the powder particles.
摘要翻译： 提供铁压块的后压实处理以提高压块的机械强度。 粉末被压实成所需的部分。 然后对该部件进行加强操作。 该操作涉及在中等温度下的热处理以及任选的树脂浸渍。 热处理在足以提高压块的机械性能的温度下进行，同时保持所需应用的低磁损耗。 可以用绝缘粘合剂浸渍以增加部件的机械强度，而不会在粉末颗粒之间产生电接触。
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10.发明授权Ferrous powder compositions containing a polymeric binder-lubricant blend 失效含有聚合物粘合剂 - 润滑剂共混物的铁粉组合物
公开(公告)号：US5980603A
公开(公告)日：1999-11-09
申请号：US80307
申请日：1998-05-18
申请人： Yannig Thomas , Sylvain Pelletier , Claude Gelinas
发明人： Yannig Thomas , Sylvain Pelletier , Claude Gelinas
CPC分类号： B22F1/0059 , C22C32/0094 , C22C33/0228 , H01F1/26
摘要： Complexable polymeric binder-lubricant blends are disclosed for production by powder metallurgy techniques of ferrous compositions with remarkably high green strength upon compaction, or soft magnetic ferrous powder/resin composites with improved processability and magnetic properties. An exemplary composition consists of a ferrous powder, a thermoset phenolic resin and poly(ethylene oxide), both polymers exhibiting, when intimately mixed, strong intermolecular acid-base interactions giving rise to an interpolymer complex which imparts a high strength to the resulting ferrous powder compact.
摘要翻译： 公开了可复合的聚合物粘合剂 - 润滑剂共混物，用于通过粉末冶金技术生产含铁组合物，其在压实时具有非常高的绿色强度，或者具有改善的加工性能和磁性能的软磁性亚铁粉末/树脂复合材料。 示例性组合物由铁粉末，热固性酚醛树脂和聚（环氧乙烷）组成，两种聚合物当充分混合时表现出强的分子间酸碱相互作用，产生互聚物络合物，其对所得的铁粉赋予高强度 紧凑。
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