子分类：
| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 121 | Triple-phase nano-composite steels | US10017847 | 2001-12-14 | US06746548B2 | 2004-06-08 | Grzegorz J. Kusinski; David Pollack; Gareth Thomas |
| Carbon steels of high performance are disclosed that contain a three-phase microstructure consisting of grains of ferrite fused with grains that contain dislocated lath structures in which laths of martensite alternate with thin films of austenite. The microstructure can be formed by a unique method of austenization followed by multi-phase cooling in a manner that avoids bainite and pearlite formation and precipitation at phase interfaces. The desired microstructure can be obtained by casting, heat treatment, on-line rolling, forging, and other common metallurgical processing procedures, and yields superior combinations of mechanical and corrosion properties. | ||||||
| 122 | Maraging steel and process for manufacturing a strip or a part cut out of a strip of cold-rolled maraging steel | US09988134 | 2001-11-19 | US06663730B2 | 2003-12-16 | Lucien Coutu |
| A maraging steel strip or part and process for manufacture of a strip or of a part cut out of a strip of cold-rolled maraging steel and hardened by a hardening heat treatment. In the process, before the hardening heat treatment is performed, the strip or the part is subjected to cold plastic deformation with a degree of working greater than 30% and the strip or the part is subjected to recrystallization annealing in order to obtain a fine-grained structure with ASTM index higher than 8. The composition by weight of the maraging steel is: 12%≦Ni≦24.5%; 2.5%≦Mo≦12%; 4.17%≦Co≦20%, Al %≦0.15%; Ti≦0.1%; N≦0.003%; Si≦0.1%; Mn≦0.1%; C≦0.005%; S≦0.001%; P≦0.005%; H≦0.0003%; O≦0.001%; iron and impurities resulting from smelting, the chemical composition also satisfying the relationships: 20%≦Ni+Mo≦27%; 50≦Co×Mo≦200; Ti×N≦2×10−4. | ||||||
| 123 | Triple-phase nano-composite steels | US10405209 | 2003-03-31 | US20030221754A1 | 2003-12-04 | Grzegorz J. Kusinski; David Pollack; Gareth Thomas |
| Carbon steels of high performance are disclosed that contain a three-phase microstructure consisting of grains of ferrite fused with grains that contain dislocated lath structures in which laths of martensite alternate with thin films of austenite. The microstructure can be formed by a unique method of austenization followed by multi-phase cooling in a manner that avoids bainite and pearlite formation and precipitation at phase interfaces. The desired microstructure can be obtained by casting, heat treatment, on-line rolling, forging, and other common metallurgical processing procedures, and yields superior combinations of mechanical and corrosion properties. | ||||||
| 124 | Super fine granular steel pipe and method for producing the same | US10420759 | 2003-04-23 | US20030221753A1 | 2003-12-04 | Takaaki Toyooka; Akira Yorifuji; Masanori Nishimori; Motoaki Itadani; Yuji Hashimoto; Takatoshi Okabe; Taro Kanayama; Masahiko Morita; Saiji Matsuoka; Nobuki Tanaka; Osamu Furukimi; Takaaki Hira |
| A steel pipe containing fine ferrite crystal grains, which has excellent toughness and ductility and good ductility-strength balance as well as superior collision impact resistance, and a method for producing the same are provided. A steel pipe containing super-fine crystal grains can be produced by heating a base steel pipe having ferrite grains with an average crystal diameter of di (nullm), in which C, Si, Mn and Al are limited within proper ranges, and if necessary, Cu, Ni, Cr and Mo, or Nb, Ti, V, B, etc. are further added, at not higher than the Ac3 transformation point, and applying reducing at an average rolling temperature of nullm (null C.) and a total reduction ratio Tred (%) within s temperature range of from 400 to Ac3 transformation point, with di, nullm and Tred being in a relation satisfying a prescribed equation. | ||||||
| 125 | Steel pipe having high formability and method for producing the same | US10049481 | 2002-02-06 | US06632296B2 | 2003-10-14 | Naoki Yoshinaga; Nobuhiro Fujita; Manabu Takahashi; Yasuhiro Shinohara; Tohru Yoshida; Natsuko Sugiura |
| The present invention provides a steel pipe excellent in formability during hydraulic forming and the like and a method to produce the same, and more specifically: a steel pipe excellent in formability having an r-value of 1.4 or larger in the axial direction of the steel pipe, and the property that the average of the ratios of the X-ray intensity in the orientation component group of {110}<110> to {332}<110> on the plane at the center of the steel pipe wall thickness to the random X-ray intensity is 3.5 or larger, and/or the ratio of the X-ray intensity in the orientation component of {110}<110> on the plane at the center of the steel pipe wall thickness to the random X-ray intensity is 5.0 or larger; and a method to produce a steel pipe excellent in formability characterized by heating the steel pipe having the property that the ratio of the X-ray intensity in every one of the orientation components of {001}<110>, {116}<110>, {114}<110> and {112}<110> on the plane at the center of the mother pipe wall thickness to the random X-ray intensity is 3 or smaller to a temperature in the range from 650 to 1,200° C. and by applying working under a condition of a diameter reduction ratio of 30% or more and a wall thickness reduction ratio of 5 to 30%. | ||||||
| 126 | Grain refinement of alloys using magnetic field processing | US10314620 | 2002-12-09 | US20030155039A1 | 2003-08-21 | Jayoung Koo; Shiun Ling; Michael John Luton; Hans Thomann; Narasimha-Rao Venkata Bangaru |
| A method for refining the grain size of alloys which undergo ferromagnetic to paramagnetic phase transformation and an alloy produced therefrom. By subjecting the alloy to a timed application of a strong magnetic field, the temperature of phase boundaries can be shifted enabling phase transformations at lower temperatures. 1 Applicants:Jayoung Koo Shiun Ling Michael J. Luton Hans Thomann Narasimha-Rao V. Bangaru | ||||||
| 127 | STEEL PIPE HAVING HIGH FORMABILITY AND METHOD FOR PRODUCING THE SAME | US10049481 | 2002-02-06 | US20030131909A1 | 2003-07-17 | Naoki Yoshinaga; Nobuhiro Fujita; Manabu Takashi; Yasuhiro Shinohara; Tohru Yoshida; Natsuko Sugiura |
| The present invention provides a steel pipe excellent in formability during hydraulic forming and the like and a method to produce the same, and more specifically: a steel pipe excellent in formability having an r-value of 1.4 or larger in the axial direction of the steel pipe, and the property that the average of the ratios of the X-ray intensity in the orientation component group of null110null<110> to null332null<110> on the plane at the center of the steel pipe wall thickness to the random X-ray intensity is 3.5 or larger, and/or the ratio of the X-ray intensity in the orientation component of null110null<110> on the plane at the center of the steel pipe wall thickness to the random X-ray intensity is 5.0 or larger; and a method to produce a steel pipe excellent in formability characterized by heating the steel pipe having the property that the ratio of the X-ray intensity in every one of the orientation components of null001null<110>, null116null<110>, null114null<110> and null112null<110> on the plane at the center of the mother pipe wall thickness to the random X-ray intensity is 3 or smaller to a temperature in the range from 650 to 1,200null C. and by applying working under a condition of a diameter reduction ratio of 30% or more and a wall thickness reduction ratio of 5 to 30%. | ||||||
| 128 | Ultrasonic machining and reconfiguration of braking surfaces | US09653987 | 2000-09-01 | US06458225B1 | 2002-10-01 | Efim S. Statnikov |
| The novel methods, apparatus and reworked rotary braking surface product, for example those exhibited on interior cylindrical braking surfaces of a cast iron brake drum, serve to replace manufacturing defects exhibiting residual tensile stresses and outwardly directed tool marks with smooth compressed braking surfaces in a final manufacturing stage. The plastically deformed surface shape with reduced roughness and surface irregularities furthermore presents improved braking strength above the yield point and approaching the ultimate material strength of the base drum material. An ultrasonic transducer drives individual freely moving impact elements of a set at frequencies up to 55 kHz into the braking surface to effect plastic deformation at surface and sub-surface layers. Physically, the small sized ultrasonic transducer is inserted into a drum cylinder and driven by a lathe producing relative motion between the braking surface and the ultrasonically vibrating impact elements scanning only the braking surface in a readily controlled ultrasonic impact machining cycle for attaining specified braking surface performance. | ||||||
| 129 | Method for producing ultrafine-grained materials using repetitive corrugation and straightening | US09799333 | 2001-03-05 | US20020088506A1 | 2002-07-11 | Yuntian T. Zhu; Terry C. Lowe; Honggang Jiang; Jianyu Huang |
| A method of refining the grain structure and improving the hardness and strength properties of a metal or metal alloy workpiece is disclosed. The workpiece is subjected to forces that corrugate and then straighten the workpiece. These steps are repeated until an ultrafine-grained product having improved hardness and strength is produced. | ||||||
| 130 | Steel pipe having high ductility and high strength and process for production thereof | US09214226 | 1998-12-30 | US06331216B1 | 2001-12-18 | Takaaki Toyooka; Akira Yorifuji; Masanori Nishimori; Motoaki Itadani; Yuji Hashimoto; Takatoshi Okabe; Nobuki Tanaka; Taro Kanayama; Osamu Furukimi; Masahiko Morita; Takaaki Hira; Saiji Matsuoka |
| The steel pipe has a structure composed mainly of ferrite or ferrite plus pearlite or ferrite plus cementite. The steel pipe is characterized by grain size not greater than 3 &mgr;m, preferably not greater than 1 &mgr;m, elongation greater than 20%, tensile strength (TS:MPa) and elongation (E1:%) whose product is greater than 10000, and percent ductile fracture greater than 95%, preferably 100%, measured by Charpy impact test on an actual pipe at −100° C. The structure is characterized by C: 0.005-0.03%, Si: 0.01-3.0%, Mn: 0.01-2.0%, and Al: 0.001-0.10% on a weight basis, and is composed of ferrite or ferrite and a secondary phase, with ferrite grains being not greater than 3 &mgr;m and the secondary phase having an areal ratio not more than 30%. A steel pipe stock having the above-mentioned composition is heated at a temperature of (Ac1+50° C.) to 400° C. and subsequently reduced at a rolling temperature of (Ac1+50° C.) to 400° C. such that the cumulative reduction of diameter is greater than 20%. The reducing is preferably performed such that at least one of rolling passes reduces the diameter by more than 6% per pass. The steel pipe will have high ductility and high strength and will be superior in toughness and stress corrosion cracking resistance, if the content of C, Si, Mn, and other alloying elements is limited low and reducing is performed at the temperature specified above. The resulting steel pipe has good fatigue resistance and is suitable for use as line pipe. | ||||||
| 131 | Densification via thermal treatment | US09525614 | 2000-03-14 | US06315838B1 | 2001-11-13 | David C. Dunand; Christopher Schuh |
| A method for creep cavity shrinkage and/or porosity reduction without applied stress. The thermal treatment is found to increase the rate of densification relative to isothermal annealing, allowing for more rapid recovery of desired theoretical density in a shorter time. | ||||||
| 132 | Super fine granular steel pipe and method for producing the same | US09771589 | 2001-01-30 | US20010027831A1 | 2001-10-11 | Takaaki Toyooka; Akira Yorifuji; Masanori Nishimori; Motoaki Itadani; Yuji Hashimoto; Takatoshi Okabe; Taro Kanayama; Masahiko Morita; Saiji Matsuoka; Nobuki Tanaka; Osamu Furukimi; Takaaki Hira |
| A steel pipe containing fine ferrite crystal grains, which has excellent toughness and ductility and good ductility-strength balance as well as superior collision impact resistance, and a method for producing the same are provided. A steel pipe containing super-fine crystal grains can be produced by heating a base steel pipe having ferrite grains with an average crystal diameter of di (nullm), in which C, Si, Mn and Al are limited within proper ranges, and if necessary, Cu, Ni, Cr and Mo, or Nb, Ti, V, B, etc. are further added, at not higher than the Ac3 transformation point, and applying reducing at an average rolling temperature of nullm (null C.) and a total reduction ratio Tred (%) within s temperature range of from 400 to Ac3 transformation point, with di, nullm and Tred being in a relation satisfying a prescribed equation. | ||||||
| 133 | Metallic article resistant to buckling | US09181214 | 1998-10-27 | US06287399B1 | 2001-09-11 | Yuta Urushiyama |
| Disclosed is an elongated metallic article having a curved section therein which has a first part formed on an outside part of the curved section, and a second part formed on an inside part of the curved section. The first part was initially deformed beyond a region of twin boundary deformation, but was thereafter returned to the region of twin boundary deformation. The second part was left deformed beyond the region of twin boundary deformation. When a compressive load is applied to the thus prepared article, and the first part and the second part are both compressed, the first part can deform more readily than the second part so that the article deforms into a more straight shape as its deformation progresses. Thus, the article may be made resistant to buckling in spite of the presence of the curved section. | ||||||
| 134 | Hot rolled steel plate to be processed having hyper fine particles, method of manufacturing the same, and method of manufacturing cold rolled steel plate | US09297818 | 1999-06-22 | US06221179B1 | 2001-04-24 | Eiko Yasuhara; Masahiko Morita; Osamu Furukimi; Susumu Okada |
| A hot rolled steel sheet with improved formability and producing method therefor, which can be easily produced with general hot strip mills, having less anisotropy of mechanical properties and final ferrite grain diameter of less than 2 &mgr;m that could not be achieved by the prior art. The hot rolled steel sheet comprises a ferrite phase as a primary phase, and has an average ferrite grain diameter of less than 2 &mgr;m, with the ferrite grains having an aspect ratio of less than 1.5. The hot rolled steel sheet is obtained by carried out a reduction process under a dynamic recrystallization conditions through reduction passes of not less than 5 stands in the hot finish rolling. | ||||||
| 135 | Ultrasonic impact methods for treatment of welded structures | US09145992 | 1998-09-03 | US06171415B2 | 2001-01-09 | Efim S. Statnikov |
| This invention provides methods of treatment for welded products by pulse impact energy, preferably ultrasonic, at original production, during the active life period for maintenance and after failure in a repair stage to improve the strength at the weld sites and to fashion stress patterns that reduce stress centers and micro-stress defects. The basic method steps are nondestructive in nature, inducing interior pulse compression waves that temporarily plasticize the metal to relax stresses and redistribute stress patterns in a gradient of metallic grain structure between a higher strength substantially grainless white layer at the weld seam to an internal base metal region in the welded body. Thus, a renewed longer life span and higher strength weld joint regions are generated in welded products. | ||||||
| 136 | WELDED JOINTS WITH NEW PROPERTIES AND PROVISION OF SUCH PROPERTIES BY ULTRASONIC IMPACT TREATMENT | PCT/US2005041036 | 2005-11-14 | WO2006057836A2 | 2006-06-01 | STATNIKOV EFIM S |
| Non-detachable welded joints with certain new or improved properties and the provision of such nondetachable welded joints by ultrasonic impact treatment, is described involving conforming to select treatment parameters to control the formation of predetermined properties and thus provide improved qualities and reliability to a joint based on the task to be served by the welded joint. The treatment parameters include repetition rate and length of the ultrasonic impact, pressing force exerted on the ultrasonic impact tool against the surface being treated, and impact amplitude. | ||||||
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| 138 | 電子素子における金属被覆のための銅合金障壁層およびキャッピング層 | JP2016517985 | 2014-06-05 | JP6291570B2 | 2018-03-14 | サン, シュウェイ; フランソワ−チャールズ, ダリー; アブーアフ, マーク; ホーガン, パトリック; ザン, チー |
| 139 | 抗菌性に優れたフェライト系ステンレス鋼板及びその製造方法 | JP2013148950 | 2013-07-17 | JP6240423B2 | 2017-11-29 | 盛田 智彦; 秦野 正治; 石丸 詠一朗; 井内 浩一; 山岸 昭仁 |
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