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51. 发明专利

JPH08325672A BELLOWS FOR HIGH TEMPERATURE USE EXCELLENT IN CRACKING RESISTANCE AND STRESS CORROSION CRACKING RESISTANCE AT HIGH TEMPERATURE 失效
公开(公告)号：JPH08325672A
公开(公告)日：1996-12-10
申请号：JP12689095
申请日：1995-05-25
申请人： NIPPON STEEL CORP
发明人： YAMAMOTO AKIO , TAKADA TAKESHI
IPC分类号： C22C38/00 , C22C38/28 , C22C38/50 , F16L27/12
摘要： PURPOSE: To produce a bellows for high temp. use excellent in cracking resistance and stress corrosion cracking resistance at high temps. CONSTITUTION: This bellows for high temp. use excellent in cracking resistance and stress corrosion cracking resistance at high temps. is the one having a compsn. contg.

52. 发明专利

JPH07268560A FERRITIC STAINLESS STEEL FOR BELLOWS MATERIAL 失效
公开(公告)号：JPH07268560A
公开(公告)日：1995-10-17
申请号：JP6398194
申请日：1994-03-31
申请人： NIPPON STEEL CORP
发明人： TAKADA TAKESHI , YAMAMOTO AKIO
IPC分类号： C22C38/00 , C22C38/28
摘要： PURPOSE:To produce the first bellows tube of a ferritic stainless steel by specifying the componental compsn. of a ferritic stainless steel and regulating its elongation to specified % or above. CONSTITUTION:The componental compsn. of this erritic stainless steel 15 constituted of the one contg., by weight,

53. 发明专利

JP2001152302A ALUMINUM ALLOY SHEET EXCELLENT IN PRESS FORMABILITY, AND ITS MANUFACTURING METHOD 失效
公开(公告)号：JP2001152302A
公开(公告)日：2001-06-05
申请号：JP33745299
申请日：1999-11-29
申请人： NIPPON STEEL CORP , SKY ALUMINIUM
发明人： SAGA MAKOTO , TAKADA TAKESHI , MURAMATSU TOSHIKI , NOGUCHI OSAMU
IPC分类号： C22F1/043 , C22C21/02 , C22F1/00
摘要： PROBLEM TO BE SOLVED: To provide an aluminum alloy sheet for automobile use, having press formability comparable with that of the 5000 series alloys and capable of giving sufficient strength by baking finish. SOLUTION: The aluminum alloy sheet excellent in press formability has a composition consisting of, by mass, 0.1-0.6% Mg, >1.2-1.7% Si, 0.5-1.5% Cu and the balance Al with inevitable impurities and satisfying Mg+Si =130 MPa, preferably >=140 MPa. This alloy sheet can be manufactured by performing solution heat treatment at 450-580 deg.C after cold rolling and then applying cooling at >=15 deg.C/s cooling rate down to a temperature between room temperature and 70 deg.C.

54. 发明专利

JPH11125334A BELLOWS HAVING GOOD HEAT RESERVING PROPERTY 失效
公开(公告)号：JPH11125334A
公开(公告)日：1999-05-11
申请号：JP28741597
申请日：1997-10-20
申请人： NIPPON STEEL CORP
发明人： YAMAMOTO AKIO , TAKADA TAKESHI
IPC分类号： F16L5/02 , C22C38/00 , C22C38/44 , C22C38/50 , F16J3/04 , F16L27/12
摘要： PROBLEM TO BE SOLVED: To remarkably improve the heat reserving property by preventing an inner pipe from directly touching the outside air by making the thermal expansion coefficient of an outer pipe larger than that of the inner pipe in a double-pipe structure bellows equipped with an outer pipe and an inner pipe. SOLUTION: Stainless steel is suitable as a material used for an inner pipe and an outer pipe of a bellows which are different in thermal expansion coefficient, and since the thermal expansion coefficient of the austenite base stainless steel is considerably larger than that of the ferritic stainless steel, the former is used for the outer pipe, and the latter is used for the inner pipe. Accordingly, in the case where high-temperature fluid flows inside the inner pipe, a clearance is produced between both pipes, thereby reducing thermal conduction due to contact so as to obtain heat reserving property. When the inner and outer pipes are fixed at both ends of the bellows and the outer pipe is kept from being extended over the inner pipe in the longitudinal direction, the clearance can be easily further enlarged. Further, not only the heat reserving property but also the other characteristics can be improved by defining the components of respective stainless steel.

55. 发明专利

JPH09143630A FERRITIC STAINLESS STEEL SHEET FOR AUTOMOBILE EXHAUST SYSTEM FLEXIBLE TUBE 失效
公开(公告)号：JPH09143630A
公开(公告)日：1997-06-03
申请号：JP30030195
申请日：1995-11-17
申请人： NIPPON STEEL CORP
发明人： TAKADA TAKESHI , YAMAMOTO AKIO
IPC分类号： C22C38/00 , C22C38/50
摘要： PROBLEM TO BE SOLVED: To produce an inexpensive ferritic stainless steel sheet for automobile exhaust system flexible tube, free from expensive Ni and excellent in high temp. salt damage resistance as well as in stress corrosion cracking resistance. SOLUTION: This steel sheet has a composition containing, by weight,

56. 发明专利

JPH0914549A FERRITE STAINLESS STEEL-MADE BELLOWS EXCELLENT IN FATIGUE CHARACTERISTIC 失效
公开(公告)号：JPH0914549A
公开(公告)日：1997-01-17
申请号：JP15823395
申请日：1995-06-23
申请人： NIPPON STEEL CORP
发明人： YAMAMOTO AKIO , TAKADA TAKESHI
IPC分类号： C22C38/18 , F16L27/12
摘要： PURPOSE: To prevent the occurrence of fatigue failure in a short time, eliminate stress corrosion cracking sensitivity, by setting ratio of thickness in a respective mountain of a bellows to thickness in a root part of minimum diameter to ratio or more of a diameter in a root part of minimum diameter to a diameter in each mountain part. CONSTITUTION: Bellows are formed from ferrite stainless steel containing 10.0wt.% or more 23.0wt.% or less Cr with a stable crystal structure of metal phase in body centered cubic at an ordinary temperature. Ratio of thickness in each mountain part of the bellows to thickness in a root part of minimum diameter is set to ratio or more of a diameter in a root part of minimum diameter to a diameter in each part. In this way, a work hardening effect is also added with strength almost made uniform between mountain/root parts, to eliminate deformation concentrated on the mountain part. As a result, since substantially loaded stress is large reduced, a time till generating fatigue failure is markedly extended.

57. 发明专利

JPH08257645A WORKING METHOD FOR BELLOWS MADE OF FERRITIC STAINLESS STEEL AND ITS DIE 失效
公开(公告)号：JPH08257645A
公开(公告)日：1996-10-08
申请号：JP6659395
申请日：1995-03-24
申请人： NIPPON STEEL CORP
发明人： YAMAMOTO AKIO , TAKADA TAKESHI , YOSHIDA SUSUMU
IPC分类号： F16J3/04 , B21D15/06 , B21D19/08 , C22C38/00 , C22C38/18
摘要： PURPOSE: To provide a bulging method for the working of bellows made of a ferritic stainless steel whose stress corrosion crack sensitivity is actually dissolved and its die. CONSTITUTION: A ferritic stainless steel pipe containing >=10.0% and

58. 发明专利

JPH08176760A FERRITIC STAINLESS STEEL WELDED PIPE FOR BELLOWS 失效
公开(公告)号：JPH08176760A
公开(公告)日：1996-07-09
申请号：JP32445094
申请日：1994-12-27
申请人： NIPPON STEEL CORP
发明人： YAMAMOTO AKIO , TAKADA TAKESHI
IPC分类号： C22C38/00 , C22C38/18 , C22C38/28 , C22C38/44
摘要： PURPOSE: To provide a ferritic stainless steel welded pipe for bellows hardly causing defective working. CONSTITUTION: In the welded steel pipe by using the ferritic stainless steel containing, by wt.,

59. 发明专利

JPH08176750A FERRITIC STAINLESS STEEL FOR WORKING BELLOWS 失效
公开(公告)号：JPH08176750A
公开(公告)日：1996-07-09
申请号：JP32875294
申请日：1994-12-28
申请人： NIPPON STEEL CORP
发明人： YAMAMOTO AKIO , TAKADA TAKESHI
IPC分类号： C22C38/00 , C22C38/18 , C22C38/26 , C22C38/28 , C22C38/50
摘要： PURPOSE: To provide a ferritic stainless steel for working a bellows by specifying the components and the crystal particle size. CONSTITUTION: This ferritic stainless steel for working a bellows contains, by wt.,

60. 发明专利

JP2003213355A ALUMINUM ALLOY FOR BULGING AND PRODUCTION METHOD THEREFOR 审中-公开
公开(公告)号：JP2003213355A
公开(公告)日：2003-07-30
申请号：JP2002017799
申请日：2002-01-28
申请人： NIPPON STEEL CORP
发明人： TAKADA TAKESHI , SAGA MAKOTO
IPC分类号： C22F1/043 , C22C21/02 , C22F1/00
摘要： PROBLEM TO BE SOLVED: To provide an aluminum alloy for bulging, and to provide a production method therefor. SOLUTION: The aluminum alloy for bulging has a composition comprising, by mass, ≥0.2% Mg, ≥0.3% Si, and COPYRIGHT: (C)2003,JPO

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