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71. 发明专利

JPH06264178A SOFT-NITRIDING STEEL 失效
公开(公告)号：JPH06264178A
公开(公告)日：1994-09-20
申请号：JP5398493
申请日：1993-03-15
申请人： KOBE STEEL LTD
发明人： AKIBA SAKAKI , MATSUSHIMA YOSHITAKE , MAEDA TOSHIO
IPC分类号： C22C38/00 , C22C38/02 , C22C38/06 , C22C38/12
摘要： PURPOSE:To obtain an excellent steel increased in effective hardening depth and improved in surface hardness by applying soft-nitriding treatment to a steel. CONSTITUTION:This steel has a composition which consists of 0.15-0.6% C, 0.03-0.5% Si, 0.4-2.0% Mn, >1.00-3.0% Cr, 0.03-0.4% V, >0.5-1.2% Al, 0.005-0.02% N, and the balance Fe with inevitable impurities and into which these elements are incorporated so that two characteristic inequalities 0

72. 发明专利

JPH05117804A BEARING STEEL HAVING EXCELLENT WORKABILITY AND ROLLING FATIGUE PROPERTY 失效
公开(公告)号：JPH05117804A
公开(公告)日：1993-05-14
申请号：JP30698191
申请日：1991-10-24
申请人： KOBE STEEL LTD
发明人： NAKAMURA MORIFUMI , MATSUSHIMA YOSHITAKE , ADACHI SHIYUUGOROU
IPC分类号： C22C38/00 , C22C38/06
摘要： PURPOSE:To provide a bearing steel having excellent rolling fatigue property more than the conventional high chromium bearing steel and excellent machinability, cold-workability and warm-workability and further, without lowering of the workability even in the case of simplifying or omitting spheroidizing annealing treatment executed before the forming work. CONSTITUTION:This steel contains by wt%, 0.45-0.7% C, 0.05-2% Si, 0.2-2% Mn, in the inspecting area to number of Alambda2O3 series inclusions and Ti series inclusions having >=10mum the average grain size existing in the steel.

73. 发明专利

JPH0559528A GEAR STEEL 失效
公开(公告)号：JPH0559528A
公开(公告)日：1993-03-09
申请号：JP24478091
申请日：1991-08-29
申请人： KOBE STEEL LTD
发明人： MATSUSHIMA YOSHITAKE , YUKIOKA TSUYOSHI
IPC分类号： C21D9/32 , C22C38/00 , C22C38/38 , C23C8/22
摘要： PURPOSE:To provide a gear steel capable of not only securing high fatigue strength but also remarkably improving pitting resistance and capable of sufficiently meeting the recent demand. CONSTITUTION:The steel has a composition consisting of, by weight, 0.03-0.25% C,

74. 发明专利

JPH0559488A PRECIPITATION HARDENING TYPE HIGH STRENGTH STEEL FOR SOFT-NITRIDING EXCELLENT IN MACHINABILITY 失效
公开(公告)号：JPH0559488A
公开(公告)日：1993-03-09
申请号：JP25035491
申请日：1991-09-02
申请人： KOBE STEEL LTD
发明人： AKIBA SAKAKI , MATSUSHIMA YOSHITAKE
IPC分类号： C22C38/00 , C22C38/12
摘要： PURPOSE:To facilitate the machinability of a steel before soft-nitriding treatment and to improve the surface hardness and strength after soft-nitriding treatment by specifying C, Si, Mn, Ni, Al, V, Ti, Fe or the like. CONSTITUTION:This steel for soft-nitriding is formed of a compsn. constituted of, by weight, 0.04 to 0.4% C, 0.05 to 0.5% Si, 0.4 to 2% Mn, 0.5 to 3% Ni, 0.1 to 1.5% Al, 0.03 to 0.3% V and the balance Fe or, in addition to the above, furthermore constituted of 0.05 to 1% Ti or 0.2 to 1.5% Cr or the like. This steel for soft-nitriding can easily be machined at

75. 发明专利

JPH0254739A BEARING STEEL HAVING EXCELLENT WORKABILITY 失效
公开(公告)号：JPH0254739A
公开(公告)日：1990-02-23
申请号：JP20360288
申请日：1988-08-16
申请人： KOBE STEEL LTD
发明人： NAKAMURA MORIFUMI , MATSUSHIMA YOSHITAKE
IPC分类号： F16C33/06 , C22C38/00 , C22C38/28 , C22C38/50
摘要： PURPOSE:To obtain the title steel having excellent rolling fatigue characteristics and workability without requiring spheroidizing annealing by reducing the Ti and O content in a Cr-contg. medium-high carbon bearing steel and furthermore reducing the content of Al2O3 and TiN. CONSTITUTION:As a bearing steel, a steel material contg., by weight, 0.45 to 0.70% C, 0.10 to 2.0% Si, 0.20 to 2.0% Mn,

76. 发明专利

JPH01306521A PRODUCTION OF GEAR HAVING EXCELLENT FATIGUE STRENGTH 失效
公开(公告)号：JPH01306521A
公开(公告)日：1989-12-11
申请号：JP13459488
申请日：1988-05-31
申请人： KOBE STEEL LTD
发明人： NAKAMURA MORIFUMI , HASEGAWA TOYOFUMI , MATSUSHIMA YOSHITAKE , NAKATANI YOSHIYUKI
IPC分类号： C23C8/22 , C21D7/06 , C22C38/00 , C22C38/38
摘要： PURPOSE:To produce the gear having excellent fatigue strength by molding a gear from a steel having a specific compsn. and subjecting the gear to a carburization hardening treatment and shot peening treatment under specific conditions. CONSTITUTION:The steel contg., by weight, 0.10-0.40% C, =50 HRC hardness at >=60m/sec projection speed. The gear which is greatly improved in the fatigue strength is obtd. in this way.

77. 发明专利

JPS6468424A PRODUCTION OF HIGH-TOUGHNESS NON-TEMPERED HOT FORGING HAVING EXCELLENT FATIGUE RESISTANCE AND MACHINABILITY 失效
公开(公告)号：JPS6468424A
公开(公告)日：1989-03-14
申请号：JP22507287
申请日：1987-09-07
申请人： KOBE STEEL LTD
发明人： NAKAMURA MORIFUMI , MATSUSHIMA YOSHITAKE , NAKATANI YOSHIYUKI
IPC分类号： C22C38/00 , C21D8/06 , C22C38/60
摘要： PURPOSE:To produce a non-tempered hot forging having high toughness and excellent fatigue resistance and machinability by adjusting the relations of respective contents of V, Mn, Cr, and S according to the content of C in a steel compsn. and controlling a forging temp. and the cooling conditions after forging. CONSTITUTION:The steel compsn. contg., by wt.%, 0.10-0.60% C, 0.05-1.00% Si, 0.3-2.5% Mn, 0.03-0.30% V, =0.35%. Forging is started at 750-1,250 deg.C and is ended at 750-1,100 deg.C by using this steel. The forging is then cooled in boiling water to the range down to 100 deg.C from the end temp. of ferrite-pearlite transformation. The forging is otherwise cooled to a 100-600 deg.C range with a fluidized layer heat treatment plant right after the end of the forging.

78. 发明专利

JPS63238243A NON-HEATTREATED STEEL FOR AUTOMOBILE PARTS EXCELLENT IN TOUGHNESS AT LOW TEMPERATURE 失效
公开(公告)号：JPS63238243A
公开(公告)日：1988-10-04
申请号：JP7282787
申请日：1987-03-26
申请人： TOYOTA MOTOR CORP , KOBE STEEL LTD
发明人： MAEDA CHIKATOSHI , MORIKAWA TAKASHI , IDE TOSHIYUKI , NAKAMURA MORIFUMI , MATSUSHIMA YOSHITAKE , NAKATANI YOSHIYUKI
IPC分类号： C22C38/00 , C22C38/38 , C22C38/60
摘要： PURPOSE:To obtain a non-heattreated steel for automobile parts having superior strength and toughness and excellent in toughness at low temp., by specifying a composition consisting of C, Si, Mn, Cr, S, V, Al, N and Fe. CONSTITUTION:The non-heattreated steel for automobile parts excellent in toughness at low temp. has a composition consisting of, by weight, 0.15-0.25% C, 0.05-1.0% Si, 0.6-2.0% Mn, tensile strength and, in a state of being allowed to stand after forging, the structure is formed into fine ferrite.pearlite, and superior strength and toughness and excellent toughness at low temp. can be provided.

79. 发明专利

JPS6274055A NON-HEATTREATED STEEL WITH HIGH TOUGHNESS FOR HOT FORGING 失效
公开(公告)号：JPS6274055A
公开(公告)日：1987-04-04
申请号：JP21420785
申请日：1985-09-27
申请人： KOBE STEEL LTD
发明人： NAKAMURA MORIFUMI , MAEDA TOSHIO , MATSUSHIMA YOSHITAKE , NAKATANI YOSHIYUKI
IPC分类号： C22C38/00 , C22C38/38 , C22C38/58 , C22C38/60
摘要： PURPOSE:To provide excellent toughness and superior machinability in the as-forged condition by specifying the content relationship between (Mn+Cr) and V in a non-heattreated steel having a specific composition. CONSTITUTION:The steel has a composition consisting of, by weight, 0.1-0.25% C, 0.05-1.0% Si, 0.6-2.5% Mn, =8.0, to which one or more elements among Ni, Mo, Nb and Ti or further one or more elements among S, Pb, Zr, Ca and Te are incorporated by proper quantities, if necessary. According to the non-heattreated steel having the above composition, excellent high strength as well as high toughness can be obtained only by letting stand to be cooled after hot forging.

80. 发明专利

JPS6144159A Steel for cold forging having superior suitability to carbonitriding 失效
标题翻译：用于冷锻的钢用于碳化的优先适用性
公开(公告)号：JPS6144159A
公开(公告)日：1986-03-03
申请号：JP16700084
申请日：1984-08-08
申请人： Kobe Steel Ltd
发明人： NAKAMURA MORIFUMI , MATSUSHIMA YOSHITAKE , KAWAKAMI HEIJIRO
IPC分类号： C22C38/00 , C22C38/18 , C22C38/44 , C22C38/60
摘要： PURPOSE: To obtain a steel for cold forging having superior suitability to carbonitriding by adding prescribed percentages of C, Si, Mn, Cr, Al and O while satisfying specified equations.
CONSTITUTION: This steel for cold forging having superior suitability to carbonitriding consists of, by weight, 0.10W0.30% C, 0.05W0.35% Si, 0.30W1.50% Mn, ≤2.5% Cr, 0.02W0.5% Al, ≤0.0030% O and the balance Fe with inevitable impurities and satisfies equations I, II. The steel has low deformation resistance during working by cold forging, and when the steel is carbonitrided after the working, an effective hardened layer having ≥800 hardness Hv is obtd. up to a large depth.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过在满足规定的方程式的同时加入规定百分比的C，Si，Mn，Cr，Al和O，获得具有优越适用于碳氮共渗的冷锻钢。构成：对于碳氮共渗具有优异适用性的这种用于冷锻的钢用重量比为0.10-0.30％的C，0.05-0.35％的Si，0.30-1.50％的Mn，<= 2.5％的Cr，0.02-0.5％的Al， 0.0030％O，余量为Fe与不可避免的杂质，满足式I，II。该钢在通过冷锻加工时具有低的变形阻力，并且当加工后钢被碳氮共混时，可获得具有> = 800硬度Hv的有效硬化层。达到很大的深度。

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