公开(公告)号：US20120251377A1

公开(公告)日：2012-10-04

申请号：US13074652

申请日：2011-03-29

申请人： Kuen-Shyang Hwang ,  Li-Hui Cheng ,  Yung-Chung Lu

发明人： Kuen-Shyang Hwang ,  Li-Hui Cheng ,  Yung-Chung Lu

IPC分类号： C22C1/05

CPC分类号： C22C33/0285 ,  B22F1/0011 ,  B22F3/16 ,  B22F2201/30 ,  B22F2998/10 ,  C22C38/02 ,  C22C38/04 ,  C22C38/44 ,  C22C38/48 ,  C22C38/58 ,  C23C8/02 ,  C23C8/22 ,  B22F2201/013 ,  B22F2201/20

摘要： A method for enhancing strength and hardness of powder metallurgy stainless steels comprises steps of fabricating a stainless steel powder into a green compact; placing the green compact in a reducing environment and maintaining the green compact at a sintering temperature to form a sintered body; and placing the sintered body in a carbon-bearing atmosphere and maintaining the sintered body at a carburizing temperature below 600° C. to implant carbon atoms into the sintered body and form carburized regions in the sintered body. Thereby, the strength and hardness of powder metallurgy stainless steels can be improved. As the carburizing temperature is lower than 600° C., chromium would not react with carbon. Therefore, the strength and hardness of powder metallurgy stainless steels can be enhanced and the superior corrosion resistance is still preserved.

摘要翻译： 一种提高粉末冶金不锈钢的强度和硬度的方法包括将不锈钢粉末制成生坯的步骤; 将生坯压坯放置在还原环境中并在烧结温度下保持生坯成型以形成烧结体; 将烧结体置于含碳气氛中，将烧结体保持在600℃以下的渗碳温度，将碳原子注入到烧结体中，在烧结体中形成渗碳区域。 因此，可以提高粉末冶金不锈钢的强度和硬度。 渗碳温度低于600℃时，铬不会与碳反应。 因此，可以提高粉末冶金不锈钢的强度和硬度，并且仍然保持优异的耐腐蚀性。

公开(公告)号：US20120247620A1

公开(公告)日：2012-10-04

申请号：US13074742

申请日：2011-03-29

申请人： Kuen-Shyang Hwang ,  Li-Hui Cheng ,  Yung-Chung Lu

发明人： Kuen-Shyang Hwang ,  Li-Hui Cheng ,  Yung-Chung Lu

IPC分类号： C23C8/22

CPC分类号： C23C8/02 ,  C23C8/22

摘要： A low-temperature stainless steel carburization method comprises steps: providing a stainless steel material; placing the stainless steel material in a halogen-free reducing environment and maintaining the stainless steel at a first temperature ranging 1,050 to 1,400° C.; and placing the stainless steel material in a carbon-bearing atmosphere and maintaining the stainless steel material at a second temperature lower than 600° C. to implant carbon atoms into the stainless steel material to form a carburized layer on the surface of the stainless steel material. A halide-bearing gas or solution is not to be applied to activate the passivation layer, so the fabrication cost would be reduced and the safety of carburization process would be enhanced. Besides, the environment can be prevented from halide pollution.

摘要翻译： 低温不锈钢渗碳方法包括以下步骤：提供不锈钢材料; 将不锈钢材料放置在无卤素还原环境中，并将不锈钢保持在1,050至1400℃的第一温度。 并将不锈钢材料放置在含碳气氛中，并将不锈钢材料保持在低于600℃的第二温度，以将碳原子注入到不锈钢材料中，以在不锈钢材料的表面上形成渗碳层 。 不施加卤化物气体或溶液以激活钝化层，因此将降低制造成本并提高渗碳过程的安全性。 此外，可以防止环境污染卤化物。

公开(公告)号：US08540825B2

公开(公告)日：2013-09-24

申请号：US13074742

申请日：2011-03-29

申请人： Kuen-Shyang Hwang ,  Li-Hui Cheng ,  Yung-Chung Lu

发明人： Kuen-Shyang Hwang ,  Li-Hui Cheng ,  Yung-Chung Lu

IPC分类号： C23C8/22 ,  C22C38/18 ,  C22C38/36

CPC分类号： C23C8/02 ,  C23C8/22

摘要： A low-temperature stainless steel carburization method comprises steps: providing a stainless steel material; placing the stainless steel material in a halogen-free reducing environment and maintaining the stainless steel at a first temperature ranging 1,050 to 1,400° C.; and placing the stainless steel material in a carbon-bearing atmosphere and maintaining the stainless steel material at a second temperature lower than 600° C. to implant carbon atoms into the stainless steel material to form a carburized layer on the surface of the stainless steel material. A halide-bearing gas or solution is not to be applied to activate the passivation layer, so the fabrication cost would be reduced and the safety of carburization process would be enhanced. Besides, the environment can be prevented from halide pollution.

摘要翻译： 低温不锈钢渗碳方法包括以下步骤：提供不锈钢材料; 将不锈钢材料放置在无卤素还原环境中，并将不锈钢保持在1,050至1400℃的第一温度。 并将不锈钢材料放置在含碳气氛中，并将不锈钢材料保持在低于600℃的第二温度，以将碳原子注入到不锈钢材料中，以在不锈钢材料的表面上形成渗碳层 。 不施加卤化物气体或溶液以激活钝化层，因此将降低制造成本并提高渗碳过程的安全性。 此外，可以防止环境污染卤化物。

公开(公告)号：US08608868B2

公开(公告)日：2013-12-17

申请号：US13081960

申请日：2011-04-07

申请人： Kuen-Shyang Hwang ,  Li-Hui Cheng ,  Yung-Chung Lu ,  Yang-Liang Fan ,  Po-Han Chen

发明人： Kuen-Shyang Hwang ,  Li-Hui Cheng ,  Yung-Chung Lu ,  Yang-Liang Fan ,  Po-Han Chen

IPC分类号： C23C8/22 ,  C23C8/30

CPC分类号： C23C8/22 ,  C23C8/02 ,  C23C8/32 ,  C23C8/34

摘要： A method for improving surface mechanical properties of non-austenitic stainless steels comprises steps of: providing a non-austenitic stainless steel material; placing the non-austenitic stainless steel material in an environment containing at least one austenite-stabilizing element, and implanting the austenite-stabilizing elements into a surface of the non-austenitic stainless steel material to form a modified layer enriched with the austenite-stabilizing elements; and placing the non-austenitic stainless steel material in a carbon-bearing atmosphere to make the modified layer in contact with the carbon-bearing atmosphere, and maintaining the non-austenitic stainless steel material at a carburizing temperature below 600° C. to implant carbon into the modified layer to form a carburized layer. The carburized layer enhances the surface hardness of the non-austenitic stainless steel material and enables it to apply to decorative components or structural components demanding high abrasion resistance, high surface hardness, and high corrosion resistance.

摘要翻译： 一种改善非奥氏体不锈钢表面机械性能的方法，包括以下步骤：提供非奥氏体不锈钢材料; 将非奥氏体不锈钢材料放置在含有至少一种奥氏体稳定元素的环境中，并将奥氏体稳定元素注入非奥氏体不锈钢材料的表面，以形成富含奥氏体稳定元素的改性层 ; 并将非奥氏体不锈钢材料放置在含碳气氛中，使改性层与含碳气氛接触，并将非奥氏体不锈钢材料保持在低于600℃的渗碳温度下，以植入碳 进入改性层以形成渗碳层。 渗碳层增强了非奥氏体不锈钢材料的表面硬度，使其能够应用于要求高耐磨性，高表面硬度和高耐腐蚀性的装饰部件或结构部件。

公开(公告)号：US20090142220A1

公开(公告)日：2009-06-04

申请号：US12366627

申请日：2009-02-05

申请人： Kuen-Shyang Hwang ,  Yung-Chung Lu

发明人： Kuen-Shyang Hwang ,  Yung-Chung Lu

IPC分类号： C22C38/44

CPC分类号： C22C33/0285 ,  B22F2998/00 ,  B22F2998/10 ,  B22F3/225 ,  B22F9/082 ,  B22F1/0003 ,  B22F1/0059 ,  B22F3/02 ,  B22F3/1021 ,  B22F3/1028

摘要： A sinter-hardening raw powder can yield a press-and-sinter compact with high hardness. The raw powder for sintering includes Fe as its primary component and also includes 0.3-0.8 wt % C, 5.0-12.0 wt % Ni, 1.0-5.0 wt % Cr, and 0.1-2.0 wt % Mo, wherein the mean particle size of the raw powder for sintering is between 50 and 100 μm. The sintered and tempered compact, without any quenching treatment, has high hardness.

摘要翻译： 烧结硬化的原料粉末可以产生高硬度的压坯和烧结体。 用于烧结的原料粉末包括Fe作为其主要成分，并且还包括0.3-0.8重量％的C，5.0-12.0重量％的Ni，1.0-5.0重量％的Cr和0.1-2.0重量％的Mo，其中， 用于烧结的原料粉末为50-100μm。 不经淬火处理的烧结和回火成型体具有高硬度。

公开(公告)号：US08940075B2

公开(公告)日：2015-01-27

申请号：US13439118

申请日：2012-04-04

申请人： Kuen-Shyang Hwang ,  Ching-Yu Chen ,  Yung-Chung Lu

发明人： Kuen-Shyang Hwang ,  Ching-Yu Chen ,  Yung-Chung Lu

IPC分类号： B22F9/04 ,  B22F9/22

CPC分类号： B22F9/04 ,  B22F1/0048 ,  B22F9/22 ,  B22F2998/10 ,  B22F2999/00 ,  B22F2201/013 ,  B22F2201/04

摘要： A method for fabricating fine reduced iron powders comprises the following steps: heating fine iron oxide powders having a mean particle size of smaller than 20 μm to a reduction temperature of over 700° C. to reduce the fine iron oxide powder into iron powders that are partially sintered into iron powder agglomerates; and performing a crushing-spheroidizing process on the iron powder agglomerates to obtain individual iron powders having a mean particle size of smaller than 20 μm. The method can reduce iron oxide powers into iron powders having a rounded shape and a high packing density and a high tap density, which are suitable for the metal injection molding process and the inductor fabrication process. The reduced iron powder may further be processed using an annealing process and a second crushing-spheroidizing process in sequence to further increase the sphericity, packing density, and tap density of the reduced iron powder.

摘要翻译： 一种制造精细还原铁粉的方法包括以下步骤：将平均粒度小于20μm的细小氧化铁粉末加热至700℃以上的还原温度，将氧化铁粉末还原成铁粉末， 部分烧结成铁粉团块; 对铁粉凝聚体进行破碎球化，得到平均粒径小于20μm的各种铁粉。 该方法可以将铁氧化物的功率降低为适合于金属注射成型工艺和电感器制造工艺的具有圆形形状和高填充密度和高振实密度的铁粉末。 还原铁粉可以进一步使用退火工艺和第二破碎球化工艺进行处理，以进一步提高还原铁粉的球形度，填充密度和振实密度。

公开(公告)号：US20090142219A1

公开(公告)日：2009-06-04

申请号：US12366624

申请日：2009-02-05

申请人： Kuen-Shyang Hwang ,  Yung-Chung Lu

发明人： Kuen-Shyang Hwang ,  Yung-Chung Lu

IPC分类号： C22C38/44 ,  C22C38/42

CPC分类号： C22C33/0285 ,  B22F2998/00 ,  B22F2998/10 ,  B22F3/225 ,  B22F1/0003 ,  B22F1/0059 ,  B22F1/0085 ,  B22F1/0096

摘要： A sinter-hardening powder can yield a sintered compact with high strength, high hardness, and high density. A raw powder for sintering includes Fe as its primary component and also comprising 0.1-0.8 wt % C, 5.0-12.0 wt % Ni, 0.1-2.0 wt % Cr, and 0.1-2.0 wt % Mo, wherein the mean particle size of the raw powder for sintering is 20 μm or less. The sintered and tempered compact, without any quenching treatment, has high hardness, high strength, high density, and good ductility.

摘要翻译： 烧结硬化粉末可以得到高强度，高硬度，高密度的烧结体。 用于烧结的原料粉末包括Fe作为其主要成分，并且还包含0.1-0.8重量％的C，5.0-12.0重量％的Ni，0.1-2.0重量％的Cr和0.1-2.0重量％的Mo，其中， 用于烧结的原料粉末为20mum以下。 不经淬火处理的烧结和回火成型体具有高硬度，高强度，高密度和良好的延展性。

公开(公告)号：US20060201280A1

公开(公告)日：2006-09-14

申请号：US11308824

申请日：2006-05-11

申请人： Kuen-Shyang Hwang ,  Yung-Chung Lu

发明人： Kuen-Shyang Hwang ,  Yung-Chung Lu

IPC分类号： C22C38/40

CPC分类号： C22C33/02 ,  B22F3/1028 ,  B22F3/225 ,  B22F2003/248 ,  B22F2998/00 ,  B22F2998/10 ,  C22C33/0257 ,  C22C38/44 ,  B22F1/0003 ,  B22F3/1021 ,  B22F1/0096 ,  B22F3/02 ,  B22F3/24

摘要： The present invention relates to a sinter hardening powder that can yield a sintered compact with high strength. The present invention provides a raw powder for sintering, comprising Fe as its primary component and also comprising 0.1-0.8 wt % C, 3.5-12.0 wt % Ni, 0.1-7.0 wt % Cr, and 2.0 wt % or less of Mo, wherein the mean particle size of the raw powder for sintering is 150 μm or less. The sintered compact having high tensile strength, high hardness, and good ductility can be formed without performing the quenching process.

摘要翻译： 本发明涉及能够产生高强度的烧结体的烧结硬化粉末。 本发明提供一种用于烧结的原料粉末，其包含Fe作为其主要成分，并且还包含0.1-0.8重量％的C，3.5-12.0重量％的Ni，0.1-7.0重量％的Cr和2.0重量％的Mo，其中 烧结用原料粉末的平均粒径为150μm以下。 可以在不进行淬火处理的情况下形成具有高拉伸强度，高硬度和良好延展性的烧结体。

公开(公告)号：US20050274222A1

公开(公告)日：2005-12-15

申请号：US10907155

申请日：2005-03-23

申请人： Kuen-Shyang Hwang ,  Yung-Chung Lu

发明人： Kuen-Shyang Hwang ,  Yung-Chung Lu

IPC分类号： B22F3/10 ,  B22F3/22 ,  B22F3/24 ,  C22C33/02

CPC分类号： B22F3/225 ,  B22F3/1028 ,  B22F2003/248 ,  B22F2998/00 ,  B22F2998/10 ,  C22C33/02 ,  C22C33/0257 ,  B22F1/0096 ,  B22F3/02 ,  B22F3/1021 ,  B22F3/24

摘要： The present invention relates to a metal powder sintered body by using fine powders as the raw material and the fabrication method thereof. The sintered body has a characteristic composition including iron (Fe), carbon (C), nickel (Ni) and at least one strengthening element, in the ratios as follows: Ni: 3.0-12.0%, carbon: 0.1-0.8%, the strengthening element: 0.5-7.0%, and the remaining portion being Fe. The sintered body has high tensile strength, high hardness, and good ductility, without treatment with the quenching process.

摘要翻译： 本发明涉及以细粉末为原料的金属粉末烧结体及其制造方法。 烧结体具有以下比例的铁（Fe），碳（C），镍（Ni）和至少一种强化元素的特征组成：Ni：3.0-12.0％，碳：0.1-0.8％ 强化元素：0.5-7.0％，剩余部分为Fe。 烧结体的拉伸强度高，硬度高，延展性好，不用淬火处理。

公开(公告)号：US4921158A

公开(公告)日：1990-05-01

申请号：US314808

申请日：1989-02-24

申请人： Kuen-Shyang Hwang ,  Mohammad Sedigh ,  Mark Roth

发明人： Kuen-Shyang Hwang ,  Mohammad Sedigh ,  Mark Roth

IPC分类号： B23K35/28 ,  B23K35/00 ,  B23K35/20 ,  B23K101/40 ,  H01L21/52 ,  H01L21/60 ,  H01L23/492

CPC分类号： H01L24/83 ,  B23K35/005 ,  H01L23/4924 ,  H01L24/29 ,  H01L24/33 ,  B23K2035/008 ,  H01L2224/29101 ,  H01L2224/83101 ,  H01L2224/8319 ,  H01L2224/83801 ,  H01L2924/01005 ,  H01L2924/01006 ,  H01L2924/01013 ,  H01L2924/01015 ,  H01L2924/01019 ,  H01L2924/01027 ,  H01L2924/01029 ,  H01L2924/01033 ,  H01L2924/01042 ,  H01L2924/01047 ,  H01L2924/01079 ,  H01L2924/01082 ,  H01L2924/0132 ,  H01L2924/01322 ,  H01L2924/014 ,  Y10T428/12528

摘要： A mechanical and electrical bond between a silicon semiconductor wafer and a molybdenum contact is created by a multi-layer brazing material. The material includes adjacent layers of titanium and silver along with a layer which is either composed of aluminum or an aluminum-silicon composite. The material is heated to a temperature above its melting point. The aluminum reacts first with the silver, thereby dissolving less of the silicon. This reduces spiking and lowers the contact resistance.