专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

71. 发明专利

JP2004176175A Steel superior in machinability and manufacturing method therefor 有权
公开(公告)号：JP2004176175A
公开(公告)日：2004-06-24
申请号：JP2003374489
申请日：2003-11-04
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： HASHIMURA MASAYUKI , MIZUNO ATSUSHI , NAITO KENICHIRO , HAGIWARA HIROSHI
IPC分类号： C21D8/00 , C22C38/00 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide a steel superior in machinability which gives a tool a long cutting life, shows an excellent roughness of a cut surface, causes excellent chip treatability, and is used for automobiles and general machines, and to provide a manufacturing method therefor.
SOLUTION: The steel superior in machinability includes, by mass%, 0.005-0.2% C, 0.3-3.0% Mn, 0.25-0.75% S and 0.002-0.014% B; and is characterized in that, with regard to MnS collected by the extraction replica method for observation through a transmission electron microscope, an existence density of the MnS having equivalent circle diameters of 0.1 to 0.5 μm is 10,000 pieces/mm
2 or more in a cross section parallel to a rolling direction of the steel, and sulfides of 10% or more by number out of the MnS compositely precipitate with boron nitride (BN). The manufacturing method therefor is also disclosed.
COPYRIGHT: (C)2004,JPO

72. 发明专利

JP2004169054A Steel having excellent machinability 有权
标题翻译：具有优异机械性能的钢铁
公开(公告)号：JP2004169054A
公开(公告)日：2004-06-17
申请号：JP2002332707
申请日：2002-11-15
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： HASHIMURA MASAYUKI , MIZUNO ATSUSHI , HIRATA HIROSHI , NAITO KENICHIRO , HAGIWARA HIROSHI
IPC分类号： C22C38/00 , C22C38/04 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a steel having excellent machinability in which a cutting tool service life is long, and machined surface roughness is satisfactory.
SOLUTION: The steel having excellent machinability has a composition comprising, by mass, 0.005 to 0.2% C, 0.001 to 0.5% Si, 0.5 to 3.0% Mn, 0.003 to 0.12% P, 0.5 to 1.0% S, 0.0005 to 0.005% B, 0.002 to 0.02% total-N and 0.005 to 0.035% total-O, and the balance Fe with inevitable impurities, and has a microstructure in which the area ratio of pearlite is ≤5%.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种切削加工性能优异的切削加工性能，加工表面粗糙度良好的钢。＆lt; P＆gt;解决方案：具有优异的机械加工性的钢具有如下组成：将0.005至0.2％的C，0.001至0.5％的Si，0.5至3.0％的Mn，0.003至0.12％的P，0.5至1.0％的S，0.0005至 0.005％B，总N为0.002〜0.02％，总O为0.005〜0.035％，余量为Fe与不可避免的杂质，并且具有珠光体的面积比≤5％的微观结构。版权所有（C）2004，JPO

73. 发明专利

JP2004169052A Steel excellent in machinability, and its production method 有权
公开(公告)号：JP2004169052A
公开(公告)日：2004-06-17
申请号：JP2002332668
申请日：2002-11-15
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： HASHIMURA MASAYUKI , MIZUNO ATSUSHI , NAITO KENICHIRO , HAGIWARA HIROSHI
IPC分类号： B22D11/00 , B22D11/22 , B22D27/04 , C22C38/00 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide steel which has an excellent machinability such as a tool service life on machining, a machined surface roughness and a chip treatability and which is used for automobiles, general machines or the like, and to provideits production method.
SOLUTION: This steel contains, by mass, 0.005 to 0.2% C, 0.3 to 3.0% Mn and 0.1 to 1.0% S, and, if required, comprises 0.0005 to 0.05% B. As for MnS extracted by an extraction replica method and observed with a transmission type electron microscope, the density of the ones of 0.1 to 0.5 μm by a diameter of the equivalent circle in the cross-section parallel to the rolling direction of the steel is ≥10,000 pieces/mm
2 .
COPYRIGHT: (C)2004,JPO

74. 发明专利

JP2002180198A HIGH STRENGTH STEEL WIRE FOR SPRING 失效
公开(公告)号：JP2002180198A
公开(公告)日：2002-06-26
申请号：JP2000386902
申请日：2000-12-20
申请人： NIPPON STEEL CORP
发明人： HASHIMURA MASAYUKI , HAGIWARA HIROSHI , MIYAKI TAKANARI
IPC分类号： C22C38/00 , C22C38/38 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide steel wire for a spring which has excellent coiling properties even in high strength satisfying tensile strength of >=1,900 MPa. SOLUTION: The heat treated steel wire for a spring has a composition containing, by mass, 0.4 to 1.0% C, 0.9 to 3.0% Si, 0.1 to 2.0% Mn, =1,900 MPa. As for cementitic spheroidal carbides occupied in the microscopic cross section, the space factor of those with a diameter of the equivalent circle of >=0.2 μm satisfies 3 μm satisfies =10, the maximum carbide size is

75. 发明专利

JP2000256785A STEEL EXCELLENT IN MACHINABILITY AND ITS PRODUCTION 失效
公开(公告)号：JP2000256785A
公开(公告)日：2000-09-19
申请号：JP6140899
申请日：1999-03-09
申请人： NIPPON STEEL CORP
发明人： HASHIMURA MASAYUKI , ISOBE KOICHI
IPC分类号： C21D6/00 , C22C38/00 , C22C38/06 , C22C38/48 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide high strength steel good in machinability. SOLUTION: This steel is the one having a compsn. contg., by weight, 0.1 to 0.85% C, 0.01 to 2.5% Si, 0.05 to 2.0% Mn, 0.003 to 0.2% P and 0.003 to 0.5% S, in which the content of A1 is limited to =1000 deg.C and is held for >=3 min.

76. 发明专利

JPH06212352A GRAPHITE FREE-CUTTING STEEL EXCELLENT IN FINISHED SURFACE ROUGHNESS 失效
公开(公告)号：JPH06212352A
公开(公告)日：1994-08-02
申请号：JP765793
申请日：1993-01-20
申请人： NIPPON STEEL CORP
发明人： KATAYAMA AKIRA , NAITO KENICHIRO , HASHIMURA MASAYUKI
IPC分类号： C22C38/00 , C22C38/60
摘要： PURPOSE:To provide free-cutting steel contg. graphite and excellent in finished surface roughness. CONSTITUTION:Graphite free-cutting steel having a compsn. contg., as fundamental components, by weight, 0.20 to 1.0% C, 0.5 to 2.0% Si, 0.3 to 1.5% Mn, average cross-sectional area, lead and bismuth and excellent in finished surface roughness is prepd. In this way, the graphite free-cutting steel excellent in machining finished surface roughness and the service life of a tool can be obtd.

77. 发明专利

JPH06212350A GRAPHITE FREE-CUTTING STEEL EXCELLENT IN TOOL SERVICE LIFE AND FINISHED SURFACE ROUGHNESS 失效
公开(公告)号：JPH06212350A
公开(公告)日：1994-08-02
申请号：JP755793
申请日：1993-01-20
申请人： NIPPON STEEL CORP
发明人： KATAYAMA AKIRA , NAITO KENICHIRO , HASHIMURA MASAYUKI
IPC分类号： C22C38/00 , C22C38/60
摘要： PURPOSE:To graphitize C in steel and to develop graphite free-cutting steel excellent in a tool service life and finished surface roughness by adding steel with a specified trace amt. of B or Pb, Bi, Te, Se or the like as well. CONSTITUTION:This steel has a compsn. contg., by weight, 0.02 to 1.0% C, 0.1 to 0.5% Si, 0.3 to 1.5% Mn, average cross sectional area in the ratio of 0.20 to 1.0%. Since it contains elements suppressing coagulation on the boundaries between a tool of Pb, Bi, Te, Se or the like and the material to be subjected to machining, the using service life of tool steel for machining is remarkably improved, and the machining finished surface roughness is remarkably improved as well.

78. 发明专利

JPH04164504A SURFACE COAT HIGH SPEED STEEL CUTTING TOOL EXCELLENT IN WEAR RESISTANCE 失效
公开(公告)号：JPH04164504A
公开(公告)日：1992-06-10
申请号：JP28583990
申请日：1990-10-25
申请人： NIPPON STEEL CORP
发明人： KATAYAMA AKIRA , ASANO ITSUYUKI , HASHIMURA MASAYUKI
IPC分类号： B23B27/14 , C23C14/58
摘要： PURPOSE:To enhance wear resistance by forming minute cracks that reach from the surface of a coat until the inside of high speed steel in the coat having 2-8mum thickness coated on the surface of the high speed steel by means of physical vapor deposition method. CONSTITUTION:A coat having 2-8mum thickness is coated which 1 or not less than 2 kinds of TiC, TiN, Ti(C, N) on the surface of high speed steel by physical vapor deposition method. Minute cracks that penetrate from the surface till the inside of the high speed steel are formed with a width of not more than 0.8mum on this coat by a cloudburst process, etc., spacing the cracks with intervals of 5-50mum, thereby flaking of the coat is suppressed, and wear resistance of a cutting tool can be enhanced.

79. 发明专利

JPH04123812A SURFACE COATED CEMENTED CARBIDE DIE HAVING EXCELLENT WEAR RESISTANCE 失效
公开(公告)号：JPH04123812A
公开(公告)日：1992-04-23
申请号：JP24248690
申请日：1990-09-14
申请人： NIPPON STEEL CORP
发明人： KATAYAMA AKIRA , ASANO ITSUYUKI , HASHIMURA MASAYUKI
IPC分类号： B21C3/02 , C23C16/30
摘要： PURPOSE:To remarkably improve wear resistance of a die by giving fine cracks on the coated film of a specific thickness fomed on the surface of a tungsten carbide base cemented carbide by chemical vaporized deposit method. CONSTITUTION:Coating film formation is performed by chemical vaporized deposit method (CVD). The coating film is laminated layers of one or more-kinds selected among TiC, TiN, Ti(C, N), Al2O3. Thickness of the coating film is in a range of 2-8mum in order to prevent the wear caused by coagulation. In order to release the residual stress in the coating film, average value of fine crack depth for restraining microscopic breakage is made to be not less than the coated film thickness nor more than the coated film thickness +5mum in the vertical direction from the coated film surface. Average value of the crack width has also to be =5mum and

80. 发明专利

JPH02185318A ELECTROLYTIC COMPOUND GRINDING 失效
公开(公告)号：JPH02185318A
公开(公告)日：1990-07-19
申请号：JP80489
申请日：1989-01-05
申请人： NIPPON STEEL CORP
发明人： HASHIMURA MASAYUKI , KATAYAMA AKIRA
IPC分类号： B23H5/00 , B23H5/08
摘要： PURPOSE:To make long time grinding possible and moreover to produce an excellent machined surface by using electrolyte which is conductive and does not corrode a machine, and applying voltage between a bond grindstone having diamond or the like as an abrasive grain and an electrode to electrolyze the bond of the grindstone for its dressing. CONSTITUTION:An electrode 2 is formed of an conductive electrode, such as copper or the like, fixed at the tip of a nozzle, and a space between a metallic bond grindstone 1 having diamond or eBN as an abrasive grain and the electrode 2 is filled with electrolyte 7, and a power source device 6 to apply the d. c. voltage of 0 - 150V is assembled between a main spindle 5 for the grindstone and the electrode 2. The electrolyte 7 contains an oil composed of mineral oil 10 - 95% and emulsifier 5 - 90% in volume percentage and conductive substance so that conductivity may be within 100 - 200,000muS/cm, and besides water as remainder. In addition to that, the electrolyte contains any one of antiseptics, animal and plant oils and an extreme pressure additive. Since the grindstone can be dressed by electrolyzing its bond, it can perform grinding work for long time and produced an excellent machined surface.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式