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1. 发明专利

JPH07109541A PRODUCTION OF ULTRACLEANLINESS BEARING STEEL AND ULTRACLEANLINESS BEARING STEEL 失效
公开(公告)号：JPH07109541A
公开(公告)日：1995-04-25
申请号：JP27771893
申请日：1993-10-08
申请人： NIPPON SEIKO KK , SANYO SPECIAL STEEL CO LTD , NIKKO KINZOKU KK , JAPAN ENERGY CORP
发明人： FURUMURA KYOSABURO , ABE TSUTOMU , NISHIMORI HIROSHI , KITADE SHINICHI , SHIMIZU FUMIYUKI
IPC分类号： C22C33/04 , C22C38/00 , C22C38/22 , C22C38/44
摘要： PURPOSE:To obtain an ultracleanliness bearing steel excellent in fatigue properties by using a bearing steel in which the content of Mn is limited as a base metal and regulating the diameter of oxide inclusion grains through electron beam remelting and the subsequent ingot-making operation. CONSTITUTION:In this method, a bearing steel in which the content of Mn is limited to =15mum diameter from the molten metal in the conditions that the dimension of the refining container, the position of baking and the melting speed satisfy the relationship expressed by the formula. Thus, the ultracleanliness bearing steel whose oxide inclusion grains is regulated to

2. 发明专利

JP2001329333A STEEL FOR COLD FORGING AND INDUCTION HARDENING 失效
公开(公告)号：JP2001329333A
公开(公告)日：2001-11-27
申请号：JP2000145587
申请日：2000-05-17
申请人： SANYO SPECIAL STEEL CO LTD
发明人： NISHIMORI HIROSHI
IPC分类号： C22C38/00 , C22C38/18 , C22C38/32
摘要： PROBLEM TO BE SOLVED: To provide steel having cold forgeability more excellent than that of steel for machine structures such as S53C without performing complicated heat treatment before cold forging, particularly improved in limit upsetting ratio and having induction hardenability. SOLUTION: This steel for induction hardenincy excellent in cold forgeability is composed of steel having a composition containing, by mass, 0.40 to 0.65% C, 0.30 to 0.70% Cr, >0.015 to 0.050% Al,

3. 发明专利

JP2001329337A CASE HARDENING STEEL EXCELLENT IN CHIPPING RESISTANCE 失效
公开(公告)号：JP2001329337A
公开(公告)日：2001-11-27
申请号：JP2000145586
申请日：2000-05-17
申请人： SANYO SPECIAL STEEL CO LTD
发明人： NAGAOKA TORU , NISHIMORI HIROSHI
IPC分类号： C22C38/00 , C22C38/38 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide case hardening steel for carburizing or carbo-nitriding capable of obtaining carburized parts excellent in chipping resistance. SOLUTION: In this case hardening steel excellent in chipping resistance shown in the figure, fine TiC is dispersed into steel by the addition of Ti to dispersedly reinforce the matrix of the steel, also, 4Si+Mn+2Cr>4.3 is satisfied to improve its softening resistance, and further, the content of Si is controlled to 0.40 to 1.50% to reduce the depth of an intergranular oxidized layer in the surface layer formed at the time of carburizing or carbo-nitriding compared to that in JIS SCM420 of Si: 0.15 to 0.35%.

4. 发明专利

JPH05163525A MANUFACTURE OF CRYSTAL GRAIN STABILIZED CASE HARDENED STEEL OF FINE STRUCTURE 失效
公开(公告)号：JPH05163525A
公开(公告)日：1993-06-29
申请号：JP35006591
申请日：1991-12-09
申请人： SANYO SPECIAL STEEL CO LTD
发明人： NISHIMORI HIROSHI , KOBAYASHI KAZUHIRO
IPC分类号： C21D6/00 , C21D8/00 , C22C38/00 , C22C38/06
摘要： PURPOSE:To make a refined structure and to stabilize crystal grains by hot rolling under specific conditions a case hardened steel with a specific chemical composition and cooling it. CONSTITUTION:After heating at the temperature of 1150 deg.C or higher the case hardened steel containing, by weight, 0.08-0.30% C, 0.05-1.0% Si and 0.3-2.0% Mn, 0.015-0.050% Al, 0.015-0.030% N in the range to satisfy Al(%)/N(%)

5. 发明专利

JPH05125437A MANUFACTURE OF GRAIN SIZE STABILIZED CASE HARDENING STEEL 失效
公开(公告)号：JPH05125437A
公开(公告)日：1993-05-21
申请号：JP28631891
申请日：1991-10-31
申请人： SANYO SPECIAL STEEL CO LTD , HONDA MOTOR CO LTD
发明人： KOBAYASHI KAZUHIRO , NISHIMORI HIROSHI , MACHIDA ISAO , TAKAGI TAKESHI , UMENO YOSHIKAZU
IPC分类号： C21D6/00 , C21D8/00 , C22C38/00 , C22C38/12 , C22C38/58
摘要： PURPOSE:To provide the method for manufacturing case hardening steel for machine parts to be subjected to working under very severe conditions for their grain size such as spheroidizing annealing and cold forging. CONSTITUTION:The method for manufacturing grain size stabilized case hardening steel in which steel contg., by weight, 0.08 to 0.30% C, 0.05 to 1.0% Si, 0.3 to 2.0% Mn, 0.015 to 0.050% Al, 0.02 to 0.10% Nb and 0.015 to 0.030% N as well as in the range of N(%) >=0.52XAl(%)+0.15XNb(%) and the balance Fe with inevitable impurities is heated to >=1150 deg.C, is thereafter subjected to hot rolling in such a manner that its finishing temp. is regulated to 950 to 800 deg.C and is thereafter cooled to the A1 transformation point or below at 0.3 to 0.05 deg.C/sec is provided.

6. 发明专利

JP2002371318A Method for manufacturing retainer for constant velocity joint superior in machinability and bending strength 有权
标题翻译：恒定速度接头在机械性能和弯曲强度方面的制造方法
公开(公告)号：JP2002371318A
公开(公告)日：2002-12-26
申请号：JP2001179751
申请日：2001-06-14
申请人： Honda Motor Co Ltd , Sanyo Special Steel Co Ltd , 山陽特殊製鋼株式会社 , 本田技研工業株式会社
发明人： NISHIMORI HIROSHI , IGUCHI MAKOTO , USUI KOKI
IPC分类号： F16D3/20 , B21J5/00 , B21K1/14 , C21D1/06 , C21D8/00 , C21D9/40 , C22C38/00 , C22C38/32 , C23C8/20 , C23C8/22 , C23C8/44 , C23C8/64
CPC分类号： C23C8/22
摘要： PROBLEM TO BE SOLVED: To provide a retainer for a constant velocity joint of automobiles superior in bending strength, by employing a steel equivalent to SCR415 (specified in Japan Industrial Standards) and SCM415 (specified in Japan Industrial Standards), without reducing the machinability.
SOLUTION: The method for manufacturing the retainer for the constant velocity joint shown in the Figure, superior in the bending strength and machinability, is characterized by hot forging a steel which includes, by mass%, 0.10-0.25% C, 0.03-0.15% Si, 0.20-0.60% Mn, 0.003-0.030% S, 1.00-1.50% Cr, 0.05-0.20% Ti, 0.0005-0.0050% B, 0.01% or less N, and the balance Fe with unavoidable impurities, at a heating temperature of 1,000-1,700°C, to make the hardness as 88HRB or less, and by machining, carburizing, hardening, and tempering the forged workpiece to make a depth of an effective hardened layer (a distance from a surface having HV550) as 0.4-0.9 mm.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：通过采用等同于SCR415（日本工业标准规定）的钢和SCM415（日本工业标准规定）的钢来提供弯曲强度优异的汽车等速万向节的保持器，而不会降低机械加工性。解决方案：图中所示的等速万向节保持器的弯曲强度和机械加工性优良的方法，其特征在于热锻钢，其含质量为0.10-0.25％C，0.03-0.15％ Si，0.20-0.60％Mn，0.003-0.030％S，1.00-1.50％Cr，0.05-0.20％Ti，0.0005-0.0050％B，0.01％以下的N，余量为Fe的不可避免的杂质，加热温度为了使硬度为88HRB以下，通过对锻造工件进行机械加工，渗碳，硬化和回火，使有效硬化层（距离HV550的表面一定距离）的深度为0.4 -0.9 mm。

7. 发明专利

JP2001234275A CASE HARDENING STEEL EXCELLENT IN ROLLING FATIGUE LIFE IN QUASI-HIGH TEMPERATURE ENVIRONMENT 失效
公开(公告)号：JP2001234275A
公开(公告)日：2001-08-28
申请号：JP2000042279
申请日：2000-02-21
申请人： SANYO SPECIAL STEEL CO LTD
发明人： HOSOKI MASAYASU , IGUCHI MAKOTO , NISHIMORI HIROSHI
IPC分类号： C22C38/00 , C22C38/46 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a case hardening steel free from the generation of the reduction of strength by the combination of deterioration of a matrix and nonmetallic inclusions and excellent in a rolling fatigue life. SOLUTION: This case hardening steel excellent in rolling fatigue characteristics in a quasi-high temperature environment ( =0.3, in which the content of 0 is limited to

8. 发明专利

JP2005105379A Method for manufacturing boron-added case-hardened steel pipe superior in cold workability and grain size property 有权
标题翻译：生产加硼硬化钢管高温的可行性和粒度性能的方法
公开(公告)号：JP2005105379A
公开(公告)日：2005-04-21
申请号：JP2003342487
申请日：2003-09-30
申请人： Sanyo Special Steel Co Ltd , 山陽特殊製鋼株式会社
发明人： NISHIMORI HIROSHI
IPC分类号： B21B19/04 , C21D8/10 , C22C38/00 , C22C38/32 , C22C38/54
摘要： PROBLEM TO BE SOLVED: To provide a method for inexpensively manufacturing a seamless steel pipe superior in grain size properties and cold workability, without deteriorating quality through decarbonization or the like.
SOLUTION: A material of the steel pipe comprises, by mass%, 0.10-0.35% C, 0.05-0.35% Si, 0.20-1.00% Mn, 0.80-2.00% Cr, 0.0005-0.0,050% B, and 0.010% or less N, further one or more elements from among three elements of 0.05-0.20% Ti, 0.02-0.20% Nb and 0.02-0.20% V, and the balance Fe with unavoidable impurities. The method for manufacturing a case-hardened seamless steel pipe superior in cold workability and grain size properties comprises piercing and rolling the steel material at a heating temperature of 1,250°C or higher; cooling the hot steel pipe to the Ar
1 point or lower at the rate of 0.1°C/s or more; then reheating it to a temperature between the Ac
3 point and 1,050°C; and finish-rolling it.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种低成本地制造粒度特性和冷加工性优异的无缝钢管的方法，而不会通过脱碳等劣化。钢管的材料以质量％计含有0.10-0.35％C，0.05-0.35％Si，0.20-1.00％Mn，0.80-2.00％Cr，0.0005-0.0,050％B和 0.010％以下的N，进一步含有0.05-0.20％Ti，0.02-0.20％Nb和0.02-0.20％V的三种元素中的一种或多种元素，余量为不可避免的杂质。冷加工性和粒径特性优异的表面硬化无缝钢管的制造方法包括在1250℃以上的加热温度下对钢材进行穿孔和轧制; 以0.1℃/ s以上的速度将热钢管冷却至Ar 1 点以下; 然后再加热至Ac 3 点和1050°C之间的温度; 并完成滚动。版权所有（C）2005，JPO＆NCIPI

9. 发明专利

JP2001329339A STEEL FOR GEAR EXCELLENT IN COLD FORGEABILITY 失效
公开(公告)号：JP2001329339A
公开(公告)日：2001-11-27
申请号：JP2000145589
申请日：2000-05-17
申请人： SANYO SPECIAL STEEL CO LTD
发明人： NISHIMORI HIROSHI , KOBAYASHI KAZUHIRO
IPC分类号： C22C38/00 , C22C38/18 , C22C38/28
摘要： PROBLEM TO BE SOLVED: To provide case hardening steel capable of withstanding severe cold forging, particularly, case hardening steel capable of withstanding more severe cold forging and suitable for the forging of a gear. SOLUTION: This steel for a gear excellent in forgeability has a composition containing, by mass, 0.10 to 0.40% C, 0.015 to 0.050% Al, >0.0100 to 0.0300% N and =0.5 and the ones with the thin type grades of >=1.5 are not contained, also, the number in one field of the ones with the thin type grade of 0.5×3.8+the number in one field of the ones with the thin type grade of 1.0×7.6 =0.5 and the ones with the thin type grade of >=2.0 are not contained, and also, the number in one field of the ones with the thin type grade of 0.5+the number in one field of the ones with the thin type grade of 1.0×3+the number in one field of the ones with the thin type grade of 1.5×9

10. 发明专利

JP2001207219A METHOD FOR PRODUCING PART FOR CARBURIZING EXCELLENT IN FATIGUE STRENGTH 失效
公开(公告)号：JP2001207219A
公开(公告)日：2001-07-31
申请号：JP2000013793
申请日：2000-01-24
申请人： SANYO SPECIAL STEEL CO LTD
发明人： FUNAMORI HIDEKI , NISHIMORI HIROSHI
IPC分类号： C21D7/06 , C22C38/00 , C22C38/58 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide steel parts that the amounts of impurities are controlled without adding expensive alloy elements such as Cr, Mo and Ni to reduce the production cost with hardly changing the producing process of the parts such as the application of carburizing and shot peening, and having fatigue strength equal to or above that of the conventional high strength parts. SOLUTION: Steel parts composed of steel having a composition containing, by weight, 0.10 to 0.30% C, 0.03 to 0.50% Si, >1.80 to 3.00% Mn and 5 to 30 ppm B, in which the contents of Ni, Cr and Mo are suppressed to the amounts of impurities of

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