公开(公告)号：US6126894A

公开(公告)日：2000-10-03

申请号：US285975

申请日：1999-04-05

申请人： Vladimir S. Moxson

发明人： Vladimir S. Moxson

IPC分类号： C22C33/02 ,  B22F3/16

CPC分类号： C22C33/0264 ,  C22C33/02 ,  C22C33/0207 ,  B22F2998/00 ,  B22F2998/10 ,  B22F2999/00

摘要： A method of producing Iron-Silicon high density sintered articles of intricate design comprising: (a) the blending of compressible iron or low-carbon steel powder, silicon alloyed iron or silicon powder, or combination of silicon alloyed iron and silicon powder, and lubricant, (b) cold pressing said blended mixture with pressures of less than 50 tsi to form the structure of said article with the density up to 88% of the theoretical value and with uniformly distributed hard powder consisting of silicon and/or silicon alloyed particles among ductile iron powder, (c) low temperature stress relieving heat treatment of said formed article at the temperature range of 360-800.degree. C. followed by a cooling rate of less than 120.degree. C./min that relieves compression stress in said iron or low carbon steel particles and provides partial bonding of these iron/steel particles inside said formed article but does not allow the substantial diffusion of silicon from hard powder consisting of silicon and/or silicon alloyed particles into ductile iron or steel particles, (d) impregnation or lubrication of said formed articles which provide hydrostatic pressure and radial plastic flow of the porous metal in a subsequent pressing operation, (e) densification of said formed article, stress relieved, and impregnated article by cold pressing to the density not less than 91% of the theoretical density using the same pressure as in the previous pressing stage, and finally (f) sintering the said formed article to obtain a density greater than 96% of the theoretical value at the elevated temperature up to 1420.degree. C. from 1250.degree. C.

摘要翻译： 一种复杂设计的铁 - 硅高密度烧结制品的制造方法，其特征在于：（a）将可压缩铁或低碳钢粉，硅合金铁或硅粉或硅合金铁和硅粉末的组合以及润滑剂 ，（b）将低于50tsi压力的所述混合混合物冷压，以形成具有高达理论值的88％的密度的所述制品的结构，以及由硅和/或硅合金颗粒组成的均匀分布的硬质粉末 球墨铸铁粉末，（c）在360-800℃的温度范围内对所述成型制品进行低温应力消除热处理，然后冷却速率小于120℃/ min，减轻所述铁中的压缩应力或 低碳钢颗粒，并且这些铁/钢颗粒在所述成形制品内部分部分粘合，但不允许硅从由硅组成的硬质粉末中显着扩散， （或）硅合金颗粒转化成球墨铸铁或钢颗粒，（d）浸渍或润滑所述成形制品，其在随后的压制操作中提供多孔金属的静水压力和径向塑性流动，（e）所述成形制品的致密化，应力 使用与先前的压制阶段相同的压力通过冷压至不小于理论密度的91％的密度的缓冲和浸渍制品，最后（f）烧结所述成形制品以获得大于96％的密度 在1250℃升温至1420℃的理论值。

公开(公告)号：US5892164A

公开(公告)日：1999-04-06

申请号：US62534

申请日：1998-04-17

申请人： Diwakar Garg ,  Kerry Renard Berger ,  James Garfield Marsden

发明人： Diwakar Garg ,  Kerry Renard Berger ,  James Garfield Marsden

IPC分类号： B22F3/10 ,  C22C33/02 ,  B22F3/12

CPC分类号： B22F3/1007 ,  C22C33/02 ,  C22C33/0264 ,  B22F2003/023 ,  B22F2998/00 ,  B22F2999/00

摘要： Fine powders of iron with less than 5% by weight graphite, copper, and an organic binder can be formed into shapes having a green density of up to about 7.4 g/cc and sintered in a hydrogen containing atmosphere to yield parts having minimum variations in physical properties. Incorporation of small quantities of copper, e.g. 1% or less by weight, negates variations in physical properties of sintered parts that were subjected to variations in the hydrogen content of the sintering atmosphere.

摘要翻译： 具有小于5重量％的石墨，铜和有机粘合剂的铁的细粉末可以形成为具有高达约7.4g / cc的生坯密度的形状，并且在含氢气氛中烧结以产生具有最小变化的部分 物理性质。 掺入少量的铜，例如 1重量％以下时，不利于烧结气氛中氢含量变化的烧结体的物性变化。

公开(公告)号：US5881354A

公开(公告)日：1999-03-09

申请号：US642679

申请日：1996-05-03

申请人： Rohith Shivanath ,  Peter Jones

发明人： Rohith Shivanath ,  Peter Jones

IPC分类号： B22F3/24 ,  C21D1/32 ,  C21D7/00 ,  C21D9/32 ,  C22C33/02 ,  C22C38/00 ,  B22F3/12

CPC分类号： C22C33/0264 ,  C21D1/32 ,  C21D7/00 ,  C22C33/02 ,  B22F2003/023 ,  B22F2003/166 ,  B22F2003/248 ,  B22F2998/10 ,  C21D9/32

摘要： A method of making a sintered article of powder metal having a carbon composition in the range of about 0.8% to 2.0% by weight, then spheroidizing the sintered article and then warm forming the sintered article at a temperature between 250.degree. and 700.degree. C. for a time duration selected to form the article to a final shape.

摘要翻译： 制造碳组成为约0.8〜2.0重量％范围的粉末金属烧结体的方法，然后对烧结体进行球化，然后在250〜700℃的温度下温热形成烧结体。 在选定的时间段内将文章形成最终形状。

公开(公告)号：US5754937A

公开(公告)日：1998-05-19

申请号：US644978

申请日：1996-05-15

申请人： Peter Jones ,  Roger Lawcock

发明人： Peter Jones ,  Roger Lawcock

IPC分类号： B22F3/02 ,  B22F3/12 ,  C22C33/02 ,  C22C38/00 ,  C22C38/22

CPC分类号： C22C33/0264 ,  B22F3/12 ,  C22C33/02 ,  C22C33/0207 ,  C22C33/0271

摘要： A method for making a high density powdered metal article is provided. The composition consists of iron based powder, lubricant, graphite and ferro alloy additions. The composition is compacted in rigid tools at ambient temperature, sintered at high temperature and then formed in rigid tools at 40 to 90 tons per square inch to a density greater than 94% of theoretical. The high density article is then annealed. The final article demonstrates remarkable mechanical properties which are atypical of powdered metal components and approach those of wrought steel.

摘要翻译： 提供一种制造高密度金属粉末制品的方法。 组合物由铁基粉末，润滑剂，石墨和铁合金添加剂组成。 组合物在环境温度下在刚性工具中压实，在高温下烧结，然后以40至90吨/平方英寸的刚性工具形成密度大于理论值的94％。 然后将高密度制品退火。 最后的文章展示了非常典型的粉末状金属组分和接近锻造钢的非凡机械性能。

公开(公告)号：US5666634A

公开(公告)日：1997-09-09

申请号：US360762

申请日：1994-12-23

申请人： Shigeru Unami ,  Osamu Furukimi

发明人： Shigeru Unami ,  Osamu Furukimi

IPC分类号： C22C33/02 ,  C22C38/00 ,  C22C38/22 ,  B22F3/12 ,  B22F5/08 ,  C22C1/04

CPC分类号： C22C33/0264 ,  B22F2998/00 ,  Y10S75/95

摘要： The invention has for its object the provision alloy steel powders for Cr-based high strength sintered bodies having high tensile strength, fatigue strength and toughness which are adapted for use in parts for motor vehicles and parts for OA apparatus.The composition of the alloy steel powder comprises, by wt %, not larger than 0.1% of C, not larger than 0.08% of Mn, 0.5-3% of Cr, 0.1-2% of Mo, not larger than 0.01% of S, not larger than 0.01% of P, not larger than 0.2% of O, optionally one or more of 0.2.about.2.5% Ni, 0.5.about.2.5% Cu and the balance being inevitable impurities and Fe. The sintered body has substantially the same composition provided that the content of C alone is limited to 0.2-1.2%.The manufacturing method comprises molding the above alloy steel powder, sintering the resulting green compact at a temperature of 1100.degree.-1300.degree. C. and immediately cooling at a cooling rate of 10.degree.-200.degree. C./minute. The sintered product may be further subjected to carburization and heat-treatments.

摘要翻译： PCT No.PCT / JP93 / 01141 Sec。 371日期1994年12月23日第 102（e）日期1994年12月23日PCT提交1993年8月12日PCT公布。 WO94 / 27764 PCT出版物 日本公开1994年12月8日本发明的目的是提供适用于机动车辆零件和OA装置的零件的具有高拉伸强度，疲劳强度和韧性的Cr系高强度烧结体用合金钢粉末。 合金钢粉末的组成按重量％计不超过0.1％，不大于0.08％的Mn，0.5-3％的Cr，0.1-2％的Mo，不大于0.01％的S ，不大于0.01％的P，不大于0.2的O，任选地一种或多种0.2差异2.5％Ni，0.5％差异2.5％Cu，余量是不可避免的杂质和Fe。 烧结体具有基本上相同的组成，只要将C的含量限制在0.2-1.2％。 制造方法包括将上述合金钢粉末成型，在1100〜1300℃的温度下烧结得到的生坯，并以10℃-200℃/分钟的冷却速度立即冷却。 可以对烧结体进一步进行渗碳和热处理。

公开(公告)号：US5599377A

公开(公告)日：1997-02-04

申请号：US506127

申请日：1995-07-24

申请人： Satoshi Uenosono ,  Kuniaki Ogura

发明人： Satoshi Uenosono ,  Kuniaki Ogura

IPC分类号： B22F1/00 ,  C22C33/02 ,  C22C38/00 ,  C22C38/04 ,  C22C38/12

CPC分类号： C22C33/0264

摘要： A mixed iron powder for powder metallurgy containing less than about 0.1 wt % of Mn, about 0.08 to 0.15 wt % of S, a total of about 0.05 to 0.70 wt % of one or more compounds selected from MoO.sub.3 and WO.sub.3, about 0.50 to 1.50 wt % of graphite powder, and the balance Fe and incidental impurities. The mixed iron powder can be manufactured by an atomizing process using water, and be used to manufacture a sintered steel having excellent machinability, strength and toughness without forming soot, even if sintered in a hydrogen-containing atmosphere.

摘要翻译： 用于粉末冶金的混合铁粉包含小于约0.1重量％的Mn，约0.08至0.15重量％的S，总计约0.05至0.70重量％的一种或多种选自MoO 3和WO 3的化合物，约0.50至1.50 重量百分比的石墨粉，余量为Fe和杂质。 混合铁粉可以通过使用水的雾化法制造，即使在含氢气氛中烧结，也可用于制造具有优异的机械加工性，强度和韧性而不形成烟灰的烧结钢。

公开(公告)号：US5571305A

公开(公告)日：1996-11-05

申请号：US298596

申请日：1994-08-31

申请人： Satoshi Uenosono ,  Hiroyuki Ishikawa ,  Kuniaki Ogura

发明人： Satoshi Uenosono ,  Hiroyuki Ishikawa ,  Kuniaki Ogura

IPC分类号： C22C33/02 ,  C21D1/00

CPC分类号： C22C33/0264 ,  C22C33/0257

摘要： Atomized steel powder having excellent machinability, containing about S 0.005 wt % to 0.3 wt %, Cr 0.03 wt % to 0.3 wt %, Mn 0.03 wt % to 0.5 wt %, O 0.30 wt % or less, and the balance Fe and incidental impurities, and sintered steel that can be manufactured therefrom. In particular, each of specific components is limited to a preferred range so that atomized steel powder exhibiting excellent machinability, dimensional accuracy and wear resistance and sintered steel that can be manufactured therefrom are provided.

摘要翻译： 具有优异的机械加工性的雾化钢粉末，含有约0.005wt％至0.3wt％，Cr 0.03wt％至0.3wt％，Mn 0.03wt％至0.5wt％，0.30wt％或更少，余量为Fe和附带杂质 ，以及可由其制造的烧结钢。 特别地，各特定成分被限制在优选的范围，从而能够提供表现出优异的机械加工性，尺寸精度和耐磨性的粉末状钢粉末以及可由其制造的烧结钢。

公开(公告)号：US5462577A

公开(公告)日：1995-10-31

申请号：US243997

申请日：1994-05-18

申请人： Kuniaki Ogura ,  Hiroyuki Ishikawa ,  Yoshiaki Maeda ,  Kouichi Komamura

发明人： Kuniaki Ogura ,  Hiroyuki Ishikawa ,  Yoshiaki Maeda ,  Kouichi Komamura

IPC分类号： B22F9/08 ,  C22C33/02 ,  B22F1/00

CPC分类号： C22C33/0264 ,  B22F9/082 ,  C22C33/02 ,  B22F2009/0828 ,  B22F2998/00

摘要： Water-atomized iron powder for powder metallurgy having a hardness of particle cross section of from about Hv 80 or higher to about 250 or lower, the iron powder having been atomized with water and dried, and having a particle surface covered with oxides which are reducible in a sintering atmosphere, and which has an oxygen content of 1.0 wt. % or less.The water-atomized ion powder can be made by an improved and simplified processing, and the cost of resulting sintered products is decreased as a result of its use.

摘要翻译： 用于粉末冶金的水雾铁粉末，具有约Hv 80或更高至约250或更低的颗粒横截面硬度，铁粉已用水雾化并干燥，并且具有被可还原的氧化物覆盖的颗粒表面 在烧结气氛中，氧含量为1.0重量％。 ％ 或更少。 水雾化的离子粉末可以通过改进和简化的加工制成，并且由于使用而导致烧结产品的成本降低。

公开(公告)号：US5346529A

公开(公告)日：1994-09-13

申请号：US855881

申请日：1992-03-23

申请人： Bjorn O. A. Pettersson

发明人： Bjorn O. A. Pettersson

IPC分类号： C22C33/02 ,  F02B75/22 ,  F02F1/10 ,  B22F1/00

CPC分类号： C22C33/0264 ,  C22C33/0207 ,  F02F1/10 ,  F02B75/22 ,  F05C2203/04 ,  F05C2203/0882

摘要： Powdered metal composition consisting essentially of carbon, copper, solid lubricant particles, carbide-enriched alloys and iron and process for sintering to yield alloyed components exhibiting improved mechanical, physical and wear-resistent properties.

摘要翻译： 基本上由碳，铜，固体润滑剂颗粒，碳化物富集的合金和铁组成的粉末状金属组合物和用于烧结以产生具有改善的机械，物理和耐磨性能的合金组分的方法。

公开(公告)号：US5256184A

公开(公告)日：1993-10-26

申请号：US780439

申请日：1991-10-16

申请人： John C. Kosco ,  William Neumann

发明人： John C. Kosco ,  William Neumann

IPC分类号： C22C33/02 ,  B22F9/00

CPC分类号： C22C33/0264

摘要： A powder composition is suitable for making a valve seat insert having good machinability and high temperature wear resistance. The composition consists essentially of about 0.5%-5% nickel, about 1%-10% molybdenum, less than 0.1% copper, about 0.4%-1.2% carbon, the remainder being iron. The ratio of nickel to molybdenum is about 0.25:1 to 1:1. The nickel and molybdenum are preferably present as a blend of elemental nickel, elemental molybdenum, and a pre-alloyed powder in which nickel and molybdenum are pre-alloyed with iron.

摘要翻译： 粉末组合物适用于制造具有良好的机械加工性和耐高温耐磨性的阀座嵌件。 该组合物基本上由约0.5％-5％的镍，约1％-10％的钼，小于0.1％的铜，约0.4％-1.2％的碳组成，其余为铁。 镍与钼的比例约为0.25:1至1:1。 镍和钼优选以元素镍，元素钼和预合金粉末的混合物存在，其中镍和钼与铁预合金化。