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1. 发明专利

JPH11222650A WEAR RESISTANT ALLOY STEEL EXCELLENT IN COLD FORGEABILITY AND ITS PRODUCTION 失效
公开(公告)号：JPH11222650A
公开(公告)日：1999-08-17
申请号：JP3801898
申请日：1998-02-04
申请人： NIPPON KOSHUHA STEEL CO LTD , ISHIDA KIYOHITO
发明人： YANO KIMITSUGU , HAYASHIDA KEIICHI , NAKAMURA KATSUYA , NISHIZAWA TAIJI , ISHIDA KIYOHITO
IPC分类号： C23C8/22 , C21D6/00 , C22C38/00 , C22C38/12 , C22C38/30 , C23C8/30
摘要： PROBLEM TO BE SOLVED: To produce an alloy steel having wear resistance equal to that of a high speed steel and furthermore excellent in cold forgeability and to provide a method for producing it. SOLUTION: In a steel sheet of

2. 发明专利

JPH11222651A HIGH WEAR RESISTANCE AND HIGH TOUGHNESS MEMBER SAND ITS PRODUCTION 失效
公开(公告)号：JPH11222651A
公开(公告)日：1999-08-17
申请号：JP3801998
申请日：1998-02-04
申请人： NIPPON KOSHUHA STEEL CO LTD , ISHIDA KIYOHITO
发明人： YANO KIMITSUGU , HAYASHIDA KEIICHI , NAKAMURA KATSUYA , NISHIZAWA TAIJI , ISHIDA KIYOHITO
IPC分类号： B23B27/14 , C22C38/00 , C22C38/12 , C23C8/22 , C23C8/32
摘要： PROBLEM TO BE SOLVED: To produce a member excellent in toughness and wear resistance and to provide a method for producing it. SOLUTION: In a steel sheet of

3. 发明专利

JPH11286745A TOOL AND ITS PRODUCTION 失效
公开(公告)号：JPH11286745A
公开(公告)日：1999-10-19
申请号：JP2618999
申请日：1999-02-03
申请人： NIPPON KOSHUHA STEEL CO LTD , ISHIDA KIYOHITO
发明人： YANO KIMITSUGU , HAYASHIDA KEIICHI , NAKAMURA KATSUYA , NISHIZAWA TAIJI , ISHIDA KIYOHITO
IPC分类号： B23B27/14 , B23P15/28 , C22C38/00 , C22C38/12 , C23C8/22
摘要： PROBLEM TO BE SOLVED: To provide a tool having the balance of strength and toughness in such a manner that the surface layer part is excellent in wear resistance and the inside of the stock is excellent in toughness and small in thermal distortion, and to provide a method for producing it. SOLUTION: In the tool formed of a low C steel having a compsn. composed of, by weight,

4. 发明专利

JPH11222649A METALLIC MEMBER EXCELLENT IN TOUGHNESS AND WEAR RESISTANCE AND ITS PRODUCTION 失效
公开(公告)号：JPH11222649A
公开(公告)日：1999-08-17
申请号：JP3801598
申请日：1998-02-04
申请人： NIPPON KOSHUHA STEEL CO LTD , ISHIDA KIYOHITO
发明人： YANO KIMITSUGU , HAYASHIDA KEIICHI , NAKAMURA KATSUYA , NISHIZAWA TAIJI , ISHIDA KIYOHITO , MACHIDA MASAHIRO
IPC分类号： C23C8/32 , C21D6/00 , C22C38/00 , C22C38/12 , C22C38/30
摘要： PROBLEM TO BE SOLVED: To produce a metallic member in which fine and hard carbides are uniformly distributed and excellent in toughness and wear resistance and to provide a method for producing it. SOLUTION: In a steel sheet of

5. 发明专利

JP2002003989A HIGH WEAR RESISTANT ALLOY STEEL AND ITS MANUFACTURING METHOD 失效
公开(公告)号：JP2002003989A
公开(公告)日：2002-01-09
申请号：JP2000192525
申请日：2000-06-27
申请人： NIPPON KOSHUHA STEEL CO LTD
发明人： NAKAMURA KATSUYA , MIZUNO YUKITAKA , HAYASHIDA KEIICHI
IPC分类号： C21D6/00 , C21D1/06 , C22C38/00 , C22C38/24
摘要： PROBLEM TO BE SOLVED: To provide high wear resistant alloy steel which can be manufactured at low cost and has wear resistance equal to or higher than that of high speed steel and in which the occurrence of thermal distortion is reduced and to provide its manufacturing method. SOLUTION: The high wear resistant alloy steel is steel having a composition containing >=[0.06×(2×Mo(mass%)+W(mass%))+0.25×V(mass%)+0.50]% C,

6. 发明专利

JPH1192871A COLD TOOL STEEL 失效
公开(公告)号：JPH1192871A
公开(公告)日：1999-04-06
申请号：JP26801097
申请日：1997-09-12
申请人： NIPPON KOSHUHA STEEL CO LTD
发明人： YOSHIDA JUNJI , KOTAKANE MASAAKI , HAYASHIDA KEIICHI
IPC分类号： C22C38/00 , C22C38/24 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To improve the wear resistance and machinability of a steel and to minimize the change of the dimensions after quenching and tempering by allowing it to have a specified compsn. contg. C, Cr, Si, V, Mo, and the balance Fe with inevitable impurities. SOLUTION: This cold tool steel contains, by weight, 1.10 to 1.35% C, 9.00 to 12.00% Cr, 0.10 to 0.30% Si, 0.20 to 0.45% V, 1.00 to 1.35% Mo and 6.0 to 10.0 Cr/C by weight ratio. By regulating the contents of C, Cr and Si and the ratio of Cr/C to the above ranges, its machinability is made satisfactory, and by incorporating 0.04 to 0.17% S as well, it is moreover improved. Furthermore, by regulating the contents of C and Cr and the ratio of Cr/C to the above ranges, its wear resistance improves. Moreover, by regulating the ratio of Cr/C and the contens of V and Mo to the above ranges, the maximum change of the dimensions in heat treatment is improved, and by regulating the contents of Si and Mo and the ratio of Cr/C to the above ranges, the anistropy in the change of the dimensions in heat treatment can also be improved.

7. 发明专利

JPH10119051A WATER COOLING STRUCTURE FOR MOLDER CYLINDER 失效
公开(公告)号：JPH10119051A
公开(公告)日：1998-05-12
申请号：JP29805796
申请日：1996-10-22
申请人： NIPPON KOSHUHA STEEL CO LTD
发明人： YAMAZAKI YOSHIO , SAWADA SUSUMU , HAYASHIDA KEIICHI , ODAKANE MASAAKI
IPC分类号： B29C33/04 , B29C45/74 , B29C47/82
摘要： PROBLEM TO BE SOLVED: To realize the efficient cooling of a cylinder main body near a hopper and the uniform total cooling of a molder. SOLUTION: This cylinder for a molder is equipped with a cylinder main body 2C, on the outer periphery of which a ring-like cooling water groove 1C is formed, a cooling water groove cover 21 mounted on the outer periphery of the cylinder main body 2C so as to cover the cooling water groove 1C and cooling water gateway pipes 5C, which are mounted to the cooling water groove cover 21 and one end part of each of which communicates into the cooling water groove 1C. In addition, the cylinder main body 2C having the cooling water groove cover 21 thereonto is installed in the installation hole 4C of a hopper jacket 3C.

8. 发明专利

JP2004256842A STEEL MATERIAL SUPERIOR IN MACHINABILITY AND MANUFACTURING METHOD THEREFOR 审中-公开
公开(公告)号：JP2004256842A
公开(公告)日：2004-09-16
申请号：JP2003046262
申请日：2003-02-24
申请人： NIPPON KOSHUHA STEEL CO LTD
发明人： YAMAZAKI YOSHIO , HAYASHIDA KEIICHI
IPC分类号： C21D6/00 , C22C38/00 , C22C38/52
摘要： PROBLEM TO BE SOLVED: To provide a steel material which is superior in machinability in as annealed state as well as in a high-temperature strength and heat check resistance, and to provide a manufacturing method therefor. SOLUTION: This steel material has a composition comprising 0.10-0.40 mass% C, 0.10-0.50 mass% Si, 0.10-1.00 mass% Mn, 8.00-12.00 mass% Cr, 0.20-1.00 mass% Ni, 1.00-3.00 mass% Mo, 2.00-8.00 mass% W, 0.05-0.30 mass% V, 8.00-12.00 mass% Co and the balance Fe with unavoidable impurities; has low hardness in as annealed state; and contains carbides and intermetallic compounds, of which 20% or more of the total amount are precipitated in grain boundaries. COPYRIGHT: (C)2004,JPO&NCIPI

9. 发明专利

JP2000192192A WHITE SPOT PREVENTIVE STEEL, AND ITS MANUFACTURE 失效
公开(公告)号：JP2000192192A
公开(公告)日：2000-07-11
申请号：JP36509698
申请日：1998-12-22
申请人： NIPPON KOSHUHA STEEL CO LTD
发明人： HAYASHIDA KEIICHI
IPC分类号： C21C7/00 , C21C7/04 , C22C38/00 , C22C38/50
摘要： PROBLEM TO BE SOLVED: To provide a steel capable of preventing the occurrence of white spots while obviating the necessity of particular treatment requiring large amounts of energy and much time, and its manufacturing method. SOLUTION: This white spot preventive steel has a composition consisting of, by weight, 0.01-0.70% C, 0.1-1.0% Si, 0.1-1.0% Mn, 0.1-8.0% of one or >=2 elements among Cr, Ni, Mo, V, and W, 0.01-0.10% Al, 0.01-0.10% of Ti or Zr, and the balance Fe with inevitable impurities.

10. 发明专利

JPH11279704A High hardness cold tool steel for prehardening excellent in wear resistance and machinability 失效
标题翻译：高硬度工具钢，用于预先保持耐磨性和机械性能
公开(公告)号：JPH11279704A
公开(公告)日：1999-10-12
申请号：JP9849398
申请日：1998-03-26
申请人： Nippon Koshuha Steel Co Ltd , 日本高周波鋼業株式会社
发明人： YOSHIDA JUNJI , MACHIDA YUUYA , HAYASHIDA KEIICHI
IPC分类号： B21D37/01 , C21D1/18 , C21D1/25 , C21D6/00 , C22C38/00 , C22C38/24
摘要： PROBLEM TO BE SOLVED: To obtain a tool steel improved in machinability by containing a specified quantity in each of C, Si, Mn, Cr, Mo and V, making the balance to be Fe with inevitable impurities, and specifying a value of Rockwell hardness after quenching/tempering.
SOLUTION: The content is, by weight, 1.20-1.35% C, 0.20-0.30% Si, ≥0.3% Mn, 9.0-11.0% Cr, 1.10-1.35 Mo, 0.20-0.45% V. A Rockwell hardness after quenching/tempering is 55-60 HRC, a wear resistance machinability index preferably satisfies the formula of 1,800 3 +15.9 ×(residual austenite %)
2 -329.9×(residual austenite %). A tempering treatment temp. after quenching is ≥505°C and the steel is treated by repeating twice or more to be a Rockwell hardness of 55-60 HRC, further preferably, a tempering treatment temp. is ≥550°C and a Rockwell hardness is 56-59 HRC.
COPYRIGHT: (C)1999,JPO
摘要翻译：要解决的问题：为了获得通过在C，Si，Mn，Cr，Mo和V中含有规定量的可提高加工性的工具钢，使余量为Fe与不可避免的杂质，并指定洛氏硬度淬火/回火后。解决方案：重量含量为1.20-1.35％C，0.20-0.30％Si，> = 0.3％Mn，9.0-11.0％Cr，1.10-1.35 Mo，0.20-0.45％V.淬火后的洛氏硬度/ 回火温度为55-60HRC，耐磨性机械加工性指数优选满足公式1,800 <25,329-0.325×（洛氏硬度）<3> +15.9×（残余奥氏体％）-23.99×（残余奥氏体％）。回火治疗温度淬火后> = 505℃，钢经过两次或更多次的洛氏硬度为55-60HRC，进一步优选回火处理温度。 = 550℃，洛氏硬度为56-59℃。

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