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1. 发明专利

JP2009256797A Steel for die having excellent machinability 有权
标题翻译：具有优异机械性能的钢
公开(公告)号：JP2009256797A
公开(公告)日：2009-11-05
申请号：JP2009077028
申请日：2009-03-26
申请人： Hitachi Metals Ltd , 日立金属株式会社
发明人： SUGANO RYUICHIRO , NAKATSU EIJI , INOUE YOSHIYUKI , TOYAMA FUMIO , TAMURA ISAO , HOSODA YASUHIRO , ANDO MITSUHIRO
IPC分类号： C22C38/00 , B29C33/38 , C21D8/06 , C21D9/00 , C22C38/46 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide a steel for a die having excellent machinability, toughness and hardness, and having excellent electric discharge properties, polishing finishing properties and wear resistance in combination. SOLUTION: Disclosed is the steel for the die having a composition containing, by mass, 0.1 to 0.25% C, ≤1.0% Si, ≤2.00% Mn, 0.6 to 1.5% Ni, >1.0 to 2.5% Cr, Mo and W alone or in combination so as to satisfy ≤1.0% (Mo+1/2W), 0.03 to 0.15% V, 0.5 to 2.0% Cu and ≤0.03% S, and in which the content of Al is regulated to ≤0.1%, N to ≤0.06% and O to ≤0.005%, and the balance Fe with inevitable impurities. MnS-based inclusions present in the structural cross-section in the steel, has the circle-equivalent diameter of ≤50 μm at the maximum and the area ratio of 0.12 to 0.7%, and further, preferably, the average crystal grain size of old austenite is ≤200 μm, and its hardness is 34 to 45 HRC. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种具有优异的机械加工性，韧性和硬度，并具有优异的放电性能，抛光精加工性能和耐磨性的组合用钢。解决方案：公开了一种组合物，其含有质量为0.1〜0.25％的Si，≤2.00％的Mn，0.6〜1.5％的Ni，1.0〜2.5％的Cr，Mo 和W组合，以满足≤1.0％（Mo + 1 / 2W），0.03〜0.15％V，0.5〜2.0％Cu和≤0.03％S，其中Al的含量调节至≤0.1 ％，N≤0.06％，O≤0.005％，余量为Fe与不可避免的杂质。存在于钢的结构截面中的MnS系夹杂物的最大直径为圆周当量直径≤50μm，面积比为0.12〜0.7％，进一步优选为平均结晶粒径奥氏体≤200μm，硬度34〜45HRC。版权所有（C）2010，JPO＆INPIT

2. 发明专利

JP2007146278A Steel for metal mold 有权
标题翻译：金属模具钢
公开(公告)号：JP2007146278A
公开(公告)日：2007-06-14
申请号：JP2006175988
申请日：2006-06-27
申请人： Hitachi Metals Ltd , 日立金属株式会社
发明人： NAKATSU EIJI , INOUE YOSHIYUKI , TOYAMA FUMIO , TAMURA ISAO , HOSODA YASUHIRO , ANDO MITSUHIRO
IPC分类号： C22C38/00 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide steel for metal molds which has excellent toughness, machinability and hardness and combines polishing finish characteristics with wear resistance.
SOLUTION: The steel for metal molds is a steel having: a composition which contains, by mass, 0.10 to 0.25% C, ≤1.00% Si, ≤2.00% Mn, 0.60 to 1.50% Ni, >1.00 to 2.50% Cr, Mo and W, independently or in combination, in amounts within the range satisfying Mo+1/2W≤1.00%, 0.03 to 0.15% V, 0.50 to 2.00% Cu and ≤0.05% S, also contains Al, N and O limited to ≤0.10%, ≤0.06% and ≤0.005%, respectively, and has the balance Fe with inevitable impurities; a structure composed mainly of lower bainite; and a hardness of 34 to 45 HRC. It is preferable that, in the above percentages in mass, the value of Ni+1.2Cu ranges from 1.30 to 2.70 and also the value of 60C+1.5Si+Ni+6Cr+2(Mo+1/2W)+20V+0.2Cu ranges from 21.00 to 28.70.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供具有优异韧性，机械加工性和硬度的金属模具的钢，并且将抛光加工特性与耐磨性相结合。解决方案：用于金属模具的钢是具有以质量计含有0.10至0.25％C，≤1.00％Si，≤2.00％Mn，0.60至1.50％Ni，> 1.00至2.50％的组成的钢， Cr，Mo和W独立地或组合地以满足Mo + 1 /2W≤1.00％，0.03〜0.15％V，0.50〜2.00％Cu和≤0.05％S的范围内的量也含有Al，N和O 分别为≤0.10％，≤0.06％和≤0.005％，余量为Fe与不可避免的杂质; 主要由下贝氏体组成的结构; 硬度为34〜45HRC。优选上述质量百分比，Ni + 1.2Cu的值在1.30〜2.70的范围内，60C + 1.5Si + Ni + 6Cr + 2（Mo + 1 / 2W）+ 20V + 0.2的值铜的范围为21.00至28.70。版权所有（C）2007，JPO＆INPIT

3. 发明专利

JP2008038219A Prehardened steel with excellent machinability and toughness 审中-公开
标题翻译：具有优异机械性和韧性的预制钢
公开(公告)号：JP2008038219A
公开(公告)日：2008-02-21
申请号：JP2006216543
申请日：2006-08-09
申请人： Hitachi Metals Ltd , 日立金属株式会社
发明人： INOUE YOSHIYUKI , TOYAMA FUMIO , NAKATSU EIJI , TAMURA ISAO , HOSODA YASUHIRO , ANDO MITSUHIRO
IPC分类号： C22C38/00 , C21D6/00 , C21D8/00 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide prehardened steel having extremely excellent machinability, further combining toughness with hardness and most suitably used for steel for metallic molds for use in plastic molding.
SOLUTION: The prehardened steel is characterized in that: it has a composition composed of, by mass, 0.10 to 0.14% C, 0.1 to 0.5% Si, 1.2 to 1.6% Mn, 0.002 to 0.005% S, 2.8 to 3.2% Ni, 0.35 to 0.85% Cr, 0.2 to 0.4% Mo,
摘要翻译：要解决的问题：提供具有极好的机加工性的预硬化钢，进一步将韧性与硬度相结合，最适合用于塑料模塑用金属模具用钢。解决方案：预硬化钢的特征在于：其组成为：质量为0.10〜0.14％的C，0.1〜0.5％的Si，1.2〜1.6％的Mn，0.002〜0.005％的S，2.8〜3.2 ％Ni，0.35〜0.85％Cr，0.2〜0.4％Mo，0.03％（含0％）V，1.3〜1.8％Cu，0.8〜1.2％Al，0.01％N，<0.002％O，余量为Fe 有不可避免的杂质; （1.2×Mn％+ 1.3×Cr％+ Cu％）的范围优选为3.50〜4.16，进一步优选为3.58〜4.08; 硬度为34〜45HRC。版权所有（C）2008，JPO＆INPIT

4. 发明专利

JP2008127643A Prehardened steel having excellent machinability and toughness and its production method 有权
标题翻译：具有优异机械性和韧性的预制钢及其生产方法
公开(公告)号：JP2008127643A
公开(公告)日：2008-06-05
申请号：JP2006315243
申请日：2006-11-22
申请人： Hitachi Metals Ltd , 日立金属株式会社
发明人： INOUE YOSHIYUKI , TOYAMA FUMIO , NAKATSU EIJI , TAMURA ISAO , HOSODA YASUHIRO , ANDO MITSUHIRO
IPC分类号： C22C38/00 , C21D6/00 , C22C38/58 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide a prehardened steel combining excellent machinability, toughness and hardness, and optimum for a die for plastic molding and to provide its production method.
SOLUTION: The prehardened steel has a composition comprising, by mass, 0.08 to 0.17% C, ≤0.4% Si, 1.0 to 2.0% Mn, 2.6 to 3.5% Ni, 0.3 to 0.8% Cr, one or two kind selected from among W and Mo in amount of 0.1 to 0.7% in terms of (1/2W+Mo), 0.5 to 1.5% Al, 1.2 to 1.8% Cu, and the balance Fe with inevitable impurities, has a hardness of 34 to 45 HRC and an impact value of ≥24 J/cm
2 observed using a 2 mm U notch test piece in accordance with a metal material Charpy impact test in JIS-Z-2242(2005). The steel may contains ≤0.3% S. The above prehardened steel is obtained by performing quenching at a cooling rate of 5 to 0.06°C/s from an austenite region to 600°C and successively at a cooling rate of 5 to 0.02°C/s from 600°C to 200°C, and performing tempering.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种结合优异的机械加工性，韧性和硬度以及用于塑料模制用模具的最佳化的预硬化钢，并提供其制造方法。解决方案：预硬化钢具有质量分数为0.08〜0.17％，Si≤0.4％，Mn为1.0〜2.0％，Ni为2.6〜3.5％，Cr为0.3〜0.8％，选择1种或2种（1 / 2W + Mo）为0.1〜0.7％，Al为0.5〜1.5％，Cu为1.2〜1.8％，余量为不可避免的杂质的Fe的硬度为34〜45 根据JIS-Z-2242（2005）中的金属材料夏比冲击试验，使用2mm U形切口试验片观察HRC和≥24J/ cm 2 的冲击值。钢可以含有≤0.3％的S。上述预硬化钢通过以5〜0.06℃/ s的冷却速度从奥氏体区域淬火至600℃，依次以5〜0.02℃的冷却速度 / s从600℃至200℃，并进行回火。版权所有（C）2008，JPO＆INPIT

5. 发明专利

JP2004332089A Method for hardening bar steel with little bending 有权
公开(公告)号：JP2004332089A
公开(公告)日：2004-11-25
申请号：JP2003133467
申请日：2003-05-12
申请人： Hitachi Metals Ltd , 日立金属株式会社
发明人： YASUI ATSUSHI , ANDO MITSUHIRO
IPC分类号： C21D1/18 , C21D9/00
摘要： PROBLEM TO BE SOLVED: To provide a hardening method with which in the hardening of a bar steel, bending after hardening is reduced.
SOLUTION: In the hardening method of the bar steel having little bending, the hardening bar steel is rapidly cooled (rapid cooling in the high temperature zone) while restricting with a press from the hardening temperature to just above Ms point and slowly cooled (cooling in the middle temperature zone) while repeating the pressing-down and releasing of a press-correcting load by reciprocatively moving the hardening bar steel in the longitudinal direction from the temperature just above Ms point. This cooling in the middle temperature zone is performed to at least the temperature of (Ms-50)°C. Then, from at least the temperature of (Ms-50)°C, the hardening bar steel is rapidly cooled (rapid cooling in the low temperature zone) while restricting with the press. In the case of hardening a flat or a square bar steel, in the rapid cooling in the high temperature zone, the flat or the square bar steel is rapidly cooled so as to bend on the front and the back surfaces as a little arch-state.
COPYRIGHT: (C)2005,JPO&NCIPI

6. 发明专利

JP2007262569A Prehardened steel having excellent machinability and toughness and its production method 有权
标题翻译：具有优异机械性和韧性的预制钢及其生产方法
公开(公告)号：JP2007262569A
公开(公告)日：2007-10-11
申请号：JP2007007907
申请日：2007-01-17
申请人： Hitachi Metals Ltd , 日立金属株式会社
发明人： INOUE YOSHIYUKI , TOYAMA FUMIO , NAKATSU EIJI , TAMURA ISAO , HOSODA YASUHIRO , ANDO MITSUHIRO
IPC分类号： C22C38/00 , C21D6/00 , C22C38/58 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide a prehardened steel having extremely excellent machinability and further combining toughness and hardness, and to provide its production method.
SOLUTION: The prehardened steel is a tool steel having a composition comprising, by mass, 0.05 to 0.17% C, ≤0.6% Si, 0.5 to 2.0% Mn, 2.5 to 3.5% Ni, ≤2.0% Cr, one or two kinds selected from W and Mo by ≤0.7% in terms of (1/2W+Mo), 0.5 to 1.5% Al and 0.7 to 2.5% Cu. The steel has a mixed structure composed of upper bainite and lower bainite, preferably, the area ratio of the lower bainite is 20 to 80%, and whose hardness is 34 to 45 HRC. A part of Fe may be substituted with ≤0.3% S. Then, after the tool steel having the composition is heated to an austenitic region, upper/lower mixed bainite formation heat treatment of cooling the same to a mixed region of the upper bainite and the lower bainite is performed, and thereafter, the tool steel is tempered to a hardness of 34 to 45 HRC.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供具有极好的可加工性并进一步结合韧性和硬度的预硬化钢，并提供其制造方法。解决方案：预硬化钢是具有质量0.05〜0.17％Si，0.5〜2.0％Mn，2.5〜3.5％Ni，≤2.0％Cr的组成的工具钢，从W和Mo中选择2种（1 / 2W + Mo）≤0.7％，Al：0.5〜1.5％，Cu：0.7〜2.5％。钢具有由上贝氏体和下贝氏体组成的混合结构，优选下贝氏体的面积比为20〜80％，硬度为34〜45HRC。 Fe的一部分可以用≤0.3％S替代。然后，将具有组成的工具钢加热到奥氏体区后，将上述/下混合贝氏体形成热处理冷却至上贝氏体和下贝氏体进行，然后将工具钢回火至34〜45℃的硬度。版权所有（C）2008，JPO＆INPIT

7. 发明专利

DE19525983A1 High heat-resistance nickel@-based alloy 未知
公开(公告)号：DE19525983A1
公开(公告)日：1996-02-01
申请号：DE19525983
申请日：1995-07-17
申请人： HITACHI METALS LTD
发明人： SATO KOJI , KOMORI MAKOTO , TAMURA YASUSHI , ANDO MITSUHIRO , KADA YOSHIHIRO , OHNO TAKEHIRO
IPC分类号： C23C28/00 , C22C19/05 , C22F1/10
摘要： High heat-resistant Ni-based alloy having a structure which has been subjected to tempering comprises: an MC-type carbide phase in 0.02-1.5 atom % from 2(C) amt., where (C) is atom % C.; a gamma'-phase of 10-30 atom % calculated from 4(0.026 (Cr) + 0.13 (Mo) + 0.13 (W) + 0.6 (Al) + 0.68 (Ti) + 0.5 (Nb) + 0.5 (Ta) - (C)), where each bracketed element is an amt. in atom % and non-loaded elements are calculated as zero; alpha-W-phase in amt. of 0.5-30 vol.%; and balance of Ni-contg. austenitic phase. Prodn. of the alloy is also claimed. The alloy is tempered at 600-850 deg C. once or twice for at least 3 hrs.. The alloy has a surface binder structure, after treating at 700-1000 deg C in atmospheric air, consisting of 3 layers of outer oxidised Cr-contg. layer, a granular alpha-W layer, and an inner oxidised Al- and Ti-contg. layer on one side. The alloy consists of 0.002-0.15% C, up to 2% Si, up to 3% Mn, > 10-25% Cr, 10-30% W, up to 15% Fe, 0.4-2.5% Al, 0.4-3.5% Ti, and balance of Ni and unavoidable impurities. A part. of the Ni is pref. replaced by up to 3.0 wt.% Nb and/or up to 3 wt.% Ta, esp. up to 10 wt.% Mo, more esp. up to 0.2 wt.% Zr and/or up to 0.02 wt.% B.

8. 发明专利

JP2002239671A HOT FORGING METHOD 失效
公开(公告)号：JP2002239671A
公开(公告)日：2002-08-27
申请号：JP2001039697
申请日：2001-02-16
申请人： TOYOTA MOTOR CORP , HITACHI METALS LTD , UMETOKU CO LTD
发明人： MORISHITA MASANORI , MUROSHIGE MASASHI , ANDO MITSUHIRO , ASADA YUKI
IPC分类号： B21J1/06 , B21J3/00 , B21J5/06
摘要： PROBLEM TO BE SOLVED: To improve the service life of a forging punch for forward extrusion or backward extrusion, and to improve the forging accuracy. SOLUTION: By using the surface-treated forging punch having a compound layer consisting of iron sulfide particles and iron nitride particles containing oxygen in a surface layer part of the punch, a work at the temperature of 1,000-1,200 deg.C is subjected to the forward extrusion forging or the backward extrusion forging while cooling and lubricating the work by using water-soluble polymer lubricant so that the temperature of the punch is 250-350 deg.C.

9. 发明专利

JPH0691359A DIE CASTING DIE HAVING WATER COOLING HOLE AND ITS MANUFACTURE 失效
公开(公告)号：JPH0691359A
公开(公告)日：1994-04-05
申请号：JP24241792
申请日：1992-09-11
申请人： HITACHI METALS LTD
发明人： ANDO MITSUHIRO , TAMURA ISAO , KADA YOSHIHIRO
IPC分类号： B22D17/22 , B29C33/04 , B29C33/38 , B29C45/73 , C21D6/00
摘要： PURPOSE:To provide a die casting die which is excellent in the heat-crack resistance of the engraved surface of the die and causes no cracking in the vicinity of the water-cooling hole, and its manufacturing method. CONSTITUTION:A die casting die 1 is provided with a water cooling hole 2 in the vicinity of the die-sinked surface, and a water cooling hole 2 where the hardness of the center part of the die is lower than that of the die-sunk surface of the die, and in the manufacturing method, the quenching and the temperature are executed to the die 1, the die-sunk surface of the die 1 is exposed to the cooling speed which is faster than that of the air cooling, and a part of the die other than the die-sunk surface of the die 1 is tempered in a hot bath 8 of the temperature of 550 deg.C or higher to obtain the hardness after tempering.

10. 发明专利

JPH0613220A STAINLESS STEEL FOR MAGNETISM AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH0613220A
公开(公告)日：1994-01-21
申请号：JP29474292
申请日：1992-11-04
申请人： HITACHI METALS LTD
发明人： ANDO MITSUHIRO
IPC分类号： C22C38/00 , C21D9/46 , H01F1/14
摘要： PURPOSE:To obtain a stainless steel for magnetism, which is specially high in the largest magnetic permeability, is superior in soft magnetism and is sufficiently high also in strength, and a method of manufacturing the steel. CONSTITUTION:A stainless steel for magnetism a martensite stainless steel containing one kind of an element or two kinds of elements out of C: 0.08 to 0.20%, Cr: 11.5 to 18.0%, Mo: 0.05 to 1.30% and W: 0.05 to 0.80% and is a stainless steel for magnetism, which has the largest magnetic permeability of mum 1500 or higher, 0.2% proof strength of 30kgf/cm or stronger and a resistivity of rho62muOMEGA.cm or higher, desirably. Moreover, a martensite stainless steel, which is a composition, is heated at 860 deg.C or higher and after that, an annealing for cooling the steel until a temperature of 600 deg.C or lower at 5 to 50 deg.C/hr is performed and the largest magnetic permeability and 0.2% proof strength of the steel are respectively set in mum 1500 or higher and 30kgf/mm or stronger.

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