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1. 发明专利

JP2002294411A STEEL FOR EXHAUST VALE HIGH IN HIGH-TEMPERATURE STRENGTH AND SUPERIOR IN RESISTANCES TO CORROSION AND ABRASION 失效
公开(公告)号：JP2002294411A
公开(公告)日：2002-10-09
申请号：JP2001095777
申请日：2001-03-29
申请人： TOHOKU STEEL , TOYOTA MOTOR CORP , AISAN IND
发明人： NISHIZAWA YOSHITAKA , OWARI NAOYUKI , ANDO KIMIHIKO , TOMINAGA TADAYOSHI , SAKURAI KOJI
IPC分类号： F01L3/02 , C22C38/00 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a steel for an exhaust valve having superior high- temperature strength, corrosion resistance, and abrasion resistance, which can cope with the exhaust-temperature elevated by combustion in a theoretical air-fuel ratio (λ=1), and can be applied to both gasoline and diesel engines. SOLUTION: This steel for the exhaust valve includes, by mass, 0.45-0.60% C, 0.1-0.5% Si, 6.0-8.0% Mn, 8.0-11.0% Ni, 22.0-24.0% Cr, 0.4-1.0% Cu, 0.3-0.6% Nb, 0.5-2.0% Mo, 0.35-0.50% N, 0.5-2.0% W, and 0.001-0.01% B, in a range satisfying 0.85-1.00% C+N, and 2.0-3.0% Mo+W, and the balance Fe and unavoidable impurities.

2. 发明专利

JP2001262280A Pb-FREE-TYPE FERRITIC FREE-CUTTING STAINLESS STEEL 失效
公开(公告)号：JP2001262280A
公开(公告)日：2001-09-26
申请号：JP2000070257
申请日：2000-03-14
申请人： ISHIDA KIYOHITO , NAT INST OF ADVANCED IND SCIEN , OIKAWA MASANARI , DAIDO STEEL CO LTD , TOHOKU STEEL
发明人： ISHIDA KIYOHITO , OIKAWA MASANARI , SHIMIZU TETSUYA , INOKUCHI TAKAYUKI , OKABE MICHIO , EHATA TAKASHI
IPC分类号： C22C38/00 , C22C38/28 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To produce a Pb-free-type ferritic stainless steel which is suitable for use as a stock for equipments or parts requiring excellent machinability, corrosion resistance and cold or hot workability and is remarkably reduced in Pb content. SOLUTION: The steel has a composition containing 0-2.0 mass% Ni, 12-35 mass% Cr and 0.005-0.2 mass% C and also containing at least either of Ti and Zr in amounts satisfying WTi+0.52 WZr=0.03 to 1.2 mass% (where WTi (mass%) and WZr (mass%) are Ti content and Zr content, respectively). Moreover, a compound, containing at least either of 0.01-0.5 mass% S and 0.01-0.4 mass% Se, further containing at least either of Ti and Zr as metallic element components, and also containing, as binder component with respect to the metallic element components, C as an essential component and further at least either of S and Se, is formed in the structure. By this method, the Pb-free-type ferritic stainless steel excellent in machinability can be attained with the least sacrifice of hot workability, cold workability and corrosion resistance.

3. 发明专利

JP2000297365A AlTi SERIES ALLOY SPUTTERING TARGET, WEAR RESISTANT AlTi SERIES ALLOY HARD FILM AND FORMATION OF THE FILM 失效
公开(公告)号：JP2000297365A
公开(公告)日：2000-10-24
申请号：JP10611899
申请日：1999-04-14
申请人： AGENCY IND SCIENCE TECHN , TOHOKU STEEL
发明人： ABE TOSHIHIKO , HASHIMOTO HITOSHI , BOKU YOUKO , SAITO YOSHINOBU , TAKEDA HIROMASA , OIKAWA HIROKATSU
IPC分类号： C22C14/00 , C22C21/00 , C23C14/06 , C23C14/34
摘要： PROBLEM TO BE SOLVED: To improve the hardness, oxidation resistance, adhesion with a base material or the like of a film formed on a cutting tool, a sliding member, a metal working tool or the like, to provide it with balanced characteristics, to execute stable film formation and to improve the service lives of the tools by allowing a sputtering target to have a specified compsn. SOLUTION: This AlTi series alloy sputtering target is the one having a compsn. of AlxTi1-x-y-zMyRz (where M denotes one or more kinds of elements selected from W and Mo, R denotes one or more kinds of rare earth elements selected from Y, Ce, La, misch metals or the like, and 0.05

4. 发明专利

JP2000017396A AUSTENITIC STAINLESS STEEL EXCELLENT IN COLD AND WARM FORGEABILITY AND MACHINABILITY, COLD AND WARM FORGED PARTS, AND WORKING METHOD THEREFOR 失效
公开(公告)号：JP2000017396A
公开(公告)日：2000-01-18
申请号：JP13919398
申请日：1998-05-07
申请人： DENSO CORP , TOHOKU STEEL
发明人： ASAOKA JUNYA , NAGATA MASAYUKI , YAMADA HIROKI , HOSOKAWA AKIRA , SAITO YOSHINOBU
IPC分类号： B21J5/00 , C22C38/00 , C22C38/58 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To obtain an austenitic stainless steel having high strength and corrosion resistance and combining excellent plastic workability (cold and warm forgeability) with machinability. SOLUTION: This austenitic stainless steel has a composition consisting of

5. 发明专利

JP2000008148A HIGH CORROSION RESISTANT SOFT MAGNETIC SINTERED BODY AND ITS POWDER 失效
公开(公告)号：JP2000008148A
公开(公告)日：2000-01-11
申请号：JP18990798
申请日：1998-06-19
申请人： DAIDO STEEL CO LTD , TOHOKU STEEL
发明人： SHIMIZU TAKASUMI , KONDO TETSUYA , KOYAMA HARUO , SAITO YOSHINOBU , OIKAWA HIROKATSU
IPC分类号： G01P3/488 , B22F5/10 , C22C19/03 , C22C33/02 , C22C38/00 , C22C38/44 , F02M51/06
摘要： PROBLEM TO BE SOLVED: To obtain a magnetic sintered body suitable for the movable iron core of an electron control type fuel injection equipment, the iron core of an electromagnetic pickup of a vehicle speed sensor or the like by allowing it to have a compsn. composed of specified weight ratios of C, Si, Mn, Ni, Cr, Mo, Cu, and the balance substantial Fe. SOLUTION: By regulating a compsn. composed of, by weight, =0.10%, the C content reduces by CO reduction, decarburization or the like in the producing process of the sintered body, but, from the viewpoint of the dimensional stability of the sintered body, it is preferably controlled to

6. 发明专利

JPH08301696A PRODUCTION OF COMPOUND SEMICONDUCTOR CRYSTAL AND DEVICE THEREFOR 失效
公开(公告)号：JPH08301696A
公开(公告)日：1996-11-19
申请号：JP10768795
申请日：1995-05-01
申请人： SEMICONDUCTOR RES FOUND , TOHOKU STEEL
发明人： NISHIZAWA JUNICHI , EHATA TAKASHI , SAWAFUJI YUTAKA
IPC分类号： C30B11/00 , C30B29/40 , H01L21/208
摘要： PURPOSE: To inexpensively obtain a high-purity and high-quality III-V group compound polycrystal by cooling a crucible after the amount of a group V raw material in a vapor pressure control part is decreased in a specific state by an amount to form a compound with a group III raw material in a crucible. CONSTITUTION: A vapor pressure in a sealed tube is gradually raised while heating a melt in a crucible so as not to raise the temperature at the wall of the sealed quartz tube too high more than a temperature for maintaining the vapor pressure of the group V raw material in the sealed tube at a fixed pressure. Then, synthetic reaction is promoted by making the vapor pressure in the sealed tube into a proper pressure higher than the equilibrium vapor pressure of a group V element in a compound. After the melt of the compound is formed, it is solidified from the lower end of the crucible at a proper rate to give the objective semiconductor polycrystal. Since the temperature at the wall of the sealed quartz tube can be reduced to a mush lower temperature than the softening point of crucible in the production method, Si contamination is extremely lessened and the sealed tube will not cause plastic deformation even if difference in pressure between the inside and outside of the sealed tube is generated.

7. 发明专利

JPH0750213A FLAT PLATE TYPE ELECTROMAGNET 失效
公开(公告)号：JPH0750213A
公开(公告)日：1995-02-21
申请号：JP19359093
申请日：1993-08-04
申请人： TOHOKU STEEL
发明人： OKITA KAZUHIKO , ISHIDA TORU
IPC分类号： H01F7/06
摘要： PURPOSE:To contrive a shortening of the attraction and open operating time of an electromagnet by a method wherein the coil spring for open of a movable iron piece is combined with the slider shafts of at least two movable iron pieces, which are installed on a core for attraction, and the spring and the shafts are mounted. CONSTITUTION:An electromagnet for electromagnetic 'brake is provided with a movable iron piece 1 and a core 2 for attraction. A coil spring 5' and a slider shaft 4 are not mounted individually unlike a conventional method but are combined with each other and are mounted. Thereby, the speedup of the attraction and open operation of the electromagnet becomes possible and as the coil spring takes charge of the protection of the slider shaft, the generation of damage in a shaft and in its turn a slider can be also prevented. Accordingly, the operating speed of an electromagnetic brake not only can be speeded up compared to a conventional electromagnetic brake but also the improvement of the durability of the electromagnetic brake can be also realized at the same time.

8. 发明专利

JPH0610102A HIGH COLD FORGEABILITY MAGNETIC STAINLESS STEEL 失效
公开(公告)号：JPH0610102A
公开(公告)日：1994-01-18
申请号：JP17129992
申请日：1992-06-29
申请人： TOHOKU STEEL
发明人： SAITO YOSHINOBU , OUCHI YASUHIDE
IPC分类号： C22C38/00 , C22C38/32 , C22C38/60 , H01F1/14
摘要： PURPOSE:To manufacture high cold forgeability stainless steel excellent in soft magnetic properties, corrosion resistance and cold forgeability by preparing magnetic stainless steel having a specified componental compsn. in which the content of Ti, Bi, Si, C, S and N is prescribed. CONSTITUTION:The magnetic stainless steel contg., by weight,

9. 发明专利

JPH0457739B2 失效
公开(公告)号：JPH0457739B2
公开(公告)日：1992-09-14
申请号：JP2294584
申请日：1984-02-13
申请人： TOHOKU STEEL
发明人： SHINAGAWA SUSUMU , SAITO YOSHINOBU
IPC分类号： C22C27/06 , C22C1/04

10. 发明专利

JPH03291360A ALLOY FOR MAGNETIC HEAD 失效
公开(公告)号：JPH03291360A
公开(公告)日：1991-12-20
申请号：JP9045390
申请日：1990-04-06
申请人： TOHOKU STEEL
发明人： SATO MASANAO
IPC分类号： C22C38/00 , C22C38/06 , G11B5/127 , H01F1/147
摘要： PURPOSE:To obtain a wear resistant alloy for magnetic head having high magnetic permeability and high saturation magnetic flux density by specifying a composition consisting of Si, Al, Ti, and Fe. CONSTITUTION:This alloy is an alloy for magnetic head which has a composition consisting of, by weight, 4-6.5% Si, 3.5-6.0% Al, 0.01-0.15% Ti, and the balance essentially Fe and further containing, if necessary, = about 13000G with wear resistance. This alloy is produced so that solid-solution C can be fixed in the form of carbide and the phenomenon of magnetic after-effects can be removed and also high magnetic permeability can be stably obtained.

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