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1. 发明专利

JPH07207713A SEDIMENT EXCAVATION MACHINE AND TOOTH MEMBER FOR SEDIMENT EXCAVATION 失效
公开(公告)号：JPH07207713A
公开(公告)日：1995-08-08
申请号：JP183594
申请日：1994-01-13
申请人： HITACHI LTD , HITACHI CONSTRUCTION MACHINERY
发明人： USAMI KENICHI , TAKAYASU HIROSHI , NAKAMURA SHIGEYOSHI , ONO TOSHIHIRO
IPC分类号： C21D6/00 , C21D9/00 , C21D9/22 , E02F9/28
摘要： PURPOSE:To improve abrasion resistance as an excavation tooth by melting and forming steel having the prescribed composition into a tooth shape and, then, hardening and tempering the steel within the prescribed temperature zone. CONSTITUTION:A steel material containing each of elements such as C, Si, Mn, P, S, Ni, Cr, Mo, B, V, and Nb within the range of the prescribed weight percentage is used as the material of an excavation tooth 1 plugged into an adapter 3 mounted on a bucket 3 and secured with a lock pin 4. The steel material having such a composition is melted and formed into the prescribed shape as the tooth 1 and, then, subjected to thermal treatment within the zone of temperature including 900 to 1000 deg.C hardening treatment and 300 to 600 deg.C tempering treatment. Also, material hardness can be enhanced by using such a material as having Vickers hardness kept between 550 and 700, and further having a mixed composition where a complex carbide mainly composed of Nb is precipitated into a matrix of tempered martensite, thereby contributing to the wear resistance of an excavation tooth member.

2. 发明专利

JP2006250151A Moving blade for high and low pressure integrated steam turbine, and high and low pressure integrated steam turbine using the same, and combined power plant 有权
标题翻译：高低压集成蒸汽涡轮机的移动叶片，以及使用它们的高低压集成蒸汽涡轮机和组合发电厂
公开(公告)号：JP2006250151A
公开(公告)日：2006-09-21
申请号：JP2006141232
申请日：2006-05-22
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SHIGA MASAO , ONODA TAKESHI , NAKAMURA SHIGEYOSHI , HIRAGA MAKOTO
IPC分类号： F01D5/28 , F01D5/06 , F01K23/10 , F02C6/18
CPC分类号： Y02E20/16
摘要： PROBLEM TO BE SOLVED: To provide a moving blade for a high and low pressure integrated steam turbine using martensitic steel with high tensile strength, and to provide a high and low pressure integrated steam turbine using the same and a combined power generation plant. SOLUTION: The moving blade for a high and low pressure integrated is made from martensitic steel containing, in weight, C0.13-0.2%, Si0.25% or less, Mn1.00% or less, Cr8.0-13.0%, Ni2-3%, Mo1.8-3.0%, V0.05-0.35%, 0.02-0.20% of either Nb or Ta/0.02-0.20% of a total amount of Nb and Ta, and N0.02-0.10%. Its tensile strength at room temperature is 120 kg/mm 2 or more, and a blade length (inch)×a steam turbine rotating number (rpm) is 120,000 or more. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种使用具有高拉伸强度的马氏体钢的高低压综合蒸汽轮机的动叶片，并提供使用其的高低压综合蒸汽轮机和组合发电厂。高压低压动叶片由马氏体钢制成，重量比为C0.13-0.2％，Si0.25％以下，Mn1.00％以下，Cr8.0- Nb，Ta和Nb的总量为Nb，Nb，Ta，0.02〜0.20％的Nb为13.0％，Ni2-3％，Mo1.8〜3.0％，V0.05-0.35％，0.02-0.20％ 0.10％。其室温下的拉伸强度为120kg / mm 2以上，叶片长度（inch）×蒸汽轮机转数（rpm）为120,000以上。版权所有（C）2006，JPO＆NCIPI

3. 发明专利

JP2004063463A Operating method of electron microscope, and electron microscope 审中-公开
公开(公告)号：JP2004063463A
公开(公告)日：2004-02-26
申请号：JP2003191579
申请日：2003-07-04
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： HIDAKA KISHIO , UENO TAKEO , YAGUCHI NORIE , USAMI KATSUHISA , AOYAMA TAKASHI , NAKAMURA SHIGEYOSHI , HIRAGA MAKOTO , TOMITA MASAHIRO
IPC分类号： G01N1/28 , H01J37/20
摘要： PROBLEM TO BE SOLVED: To provide an operating method at a high temperature, of an electron microscope, and the electron microscope, capable of stably setting a sample and efficiently heating the same with respect to high temperature properties such as phase transformation and phase transition required in the development of a heat-proof material. SOLUTION: The sample to be observed is positioned on a central hole of a double spiral flat filament, a detachable heating stage is fixed to a heating holder by a screw of a pivot, and the heating stage is vertically inclined by a crank-type arm. The heating stage and the arm are insulated from each other by an insulating member, and the electric current from a power source is conducted by a conductive wire to heat the filament. COPYRIGHT: (C)2004,JPO

4. 发明专利

JP2000356103A GAS TURBINE, DISC FOR GAS TURBINE AND HEAT RESISTING STEEL 失效
公开(公告)号：JP2000356103A
公开(公告)日：2000-12-26
申请号：JP16634199
申请日：1999-06-14
申请人： HITACHI LTD
发明人： ARAI MASAHIKO , NAKAMURA SHIGEYOSHI , SHIGA MASAO
IPC分类号： F01D5/28 , C22C38/00 , C22C38/40 , F02C7/00
摘要： PROBLEM TO BE SOLVED: To provide high-temperature strength and to improve the toughness after high-temperature, long-time heating by using a martensite steel having tensile strength at room temperature, creep rupture strength, V-notch Charpy impact value of specified values for the component of a gas turbine. SOLUTION: In this gas turbine having a three-stage blade having closed steam cooling system, its components, for example, turbine discs 11-13, a turbine spacer 18, a compressor disc or the like are formed of a martensite steel having a tensile strength at room temperature of 120 kg/mm2 or more, a 105-hr creep rupture strength at 500 deg.C of 35 kg/mm2 or more and a V-notch Charpy impact value at 25 deg.C after heating at 540 deg.C for 103 hrs of 2 kg-m/cm2 or more. The martensite steel used has the composition consisting of 0.5-0.35 wt.% of C, 0.5 wt.% or more of Si, 0.5 wt.% or more of Mn, 8-13 wt.% or more of Cr, 1.5-4 wt.% of Mo, 2-3.5 wt.% of Ni, and 0.50-0.35 wt.% of V.

5. 发明专利

JP2000161006A STEAM TURBINE BLADE, STEAM TURBINE USING IT, STEAM TURBINE POWER GENERATING PLANT, AND HIGH STRENGTH MARTENSITE STEEL 失效
公开(公告)号：JP2000161006A
公开(公告)日：2000-06-13
申请号：JP33367798
申请日：1998-11-25
申请人： HITACHI LTD
发明人： ARAI MASAHIKO , NAKAMURA SHIGEYOSHI , ONODA TAKESHI , SHIGA MASAO , HIRAGA MAKOTO
IPC分类号： F01D5/28 , C22C38/00 , C22C38/46 , C22C38/48 , F01D5/32
摘要： PROBLEM TO BE SOLVED: To lengthen a final stage moving blade of a steam turbine, and generate power with a high efficiency by forming a length of a blade part to a specified value of more, subjecting inclination of a width direction of the blade part to be in nearly parallel with an axial direction of a rotary shaft in the vicinity of an implant part, inclining a tip end of the blade part by a specified value from an axial direction, and making the blade part of martensite steel. SOLUTION: A width direction of blade part 51 of a long blade of 40 inches or more is gradually inclined by 65 to 85 degrees from an axial direction at a tip end of the blade, and a blade implant part 52 is nearly in parallel with the axial direction of an axis. The long blade material is made of martensite steel including Co: 15 to 0.25%, Si: 0.25% or less, Mn: 0.90% or less, Cr: 8.0 to 13.0%, Ni: 2 to 3.5%, Mo: 1.5 to 3.5%, V: 0.05 to 0.35%, total quantity of one kind or two kinds of Nb and Ta is 0.02 to 0.20%, and N: 0.04 to 0.15%, in a weight ratio. The long blade has to be improved in high cycle fatigue strength simultaneously in tension strength. Accordingly, a metal texture of the blade material is made of full temper martensite texture.

6. 发明专利

JPH11183360A ACID DEW POINT CORROSION LIFE ESTIMATING METHOD 失效
公开(公告)号：JPH11183360A
公开(公告)日：1999-07-09
申请号：JP34753797
申请日：1997-12-17
申请人： HITACHI LTD
发明人： ISHIBASHI MAKOTO , NAKAMURA SHIGEYOSHI , DOI HIROYUKI , OHASHI TAKEYA , TORITANI HAJIME , KUDO TAKESHI
IPC分类号： G01M99/00 , G01N17/00 , G01N33/00 , G01N33/20 , G01M19/00
摘要： PROBLEM TO BE SOLVED: To provide a method for estimating component thinning caused by acid dew point corrosion in the gas passage of a thermal power plant and for estimating the life of the component. SOLUTION: The acid dew point, water dew point and acid concentration at the estimated temperature are estimated from the temperature change of a component according to the actual machine operating procedures and concentration and pressure of the expected combustion gas component, and the actual machine simulated evaluation of a steel product used is conducted at the temperature to which the component is exposed. For the actual machine simulated evaluation, dipping evaluation is conducted when the assumed temperature is the water dew point or below, constant-humidity spraying evaluation is conducted at the water dew pint or above and at the acid dew point or below, and the change of corrosion quantity after the lapse of time is obtained.

7. 发明专利

JPH10224873A SPEECH EQUIPMENT FOR ELEVATOR 失效
公开(公告)号：JPH10224873A
公开(公告)日：1998-08-21
申请号：JP2665097
申请日：1997-02-10
申请人： HITACHI BUILDING SYST CO LTD , HITACHI LTD
发明人： NAKAMURA SHIGEYOSHI , KAWANISHI SEIJI , MURAYAMA YUKIE , BANBA TAKAYUKI
IPC分类号： B66B3/00 , G08B25/04 , H04M9/00 , H04Q9/00
摘要： PROBLEM TO BE SOLVED: To provide the speech equipment for an elevator in which no new power supply equipment for connection to a supervisory center equipment is required and power consumption of a battery power supply of an interphone is saved. SOLUTION: The equipment is provided with a relay 10 that makes ON/OFF changeover in response to a call operation of all buttons 2a, 3a provided to an interphone master set 2 and an interphone slave set 3, a relay 11 to supply drive power to a microcomputer 9 controlling a speech controller 8, and a converter 12 that converts a voltage of the drive power into a prescribed voltage. In the case that a calling operation by the call button 2a is made, the battery power supply 1 and the microcomputer 9 are connected through a normally open contact 10a that is closed by energizing the relay 10 and a normally open contact 11a is closed by energizing the relay 11 to hold the connecting state and the battery power supply 1 is used to make a speech between the interphone master set 2 and the supervisory center equipment 6.

8. 发明专利

JPH10123123A METHOD FOR ESTIMATING CREEP LIFE OF GAS TURBINE HIGH-TEMPERATURE PART 失效
公开(公告)号：JPH10123123A
公开(公告)日：1998-05-15
申请号：JP27941696
申请日：1996-10-22
申请人： HITACHI LTD , KYUSHU ELECTRIC POWER
发明人： KONNO SHINYA , NAKAMURA SHIGEYOSHI , DOI HIROYUKI , KUMADA KAZUHIKO , KANETANI AKIHIRO , HAYAKAWA HIROYUKI , WATANABE HAJIME
IPC分类号： G01M13/00 , G01N33/20
摘要： PROBLEM TO BE SOLVED: To estimate the creep life of gas turbine high-temperature parts whose operating temperature is unknown, with the average particle diameter of a deposit that can be measured after using for a certain period as an index. SOLUTION: An unused material of an alloy used for an actual machine is used, a creep test at various kinds of temperatures and stresses selected from a stress range applied to a turbine part is performed, and the average particle diameter of a deposit on creep rupture is measured, thus obtaining a constant. Then, a test is interrupted at various kinds of times, the average particle diameter and the deposit area rate of a test material and a creep distortion are measured at each interruption, and a constant is obtained. On the other hand, a deposit average diameter and an area rate are measured for a gas turbine high-temperature part that is used for a certain period and a deposit coarseness speed under usage conditions is calculated from an operation time, thus measuring the relationship between the operation time and the speed. Then, the change of a creep damage rate with time is estimated. The change of the creep distortion with time is estimated from the area rate and the average particle diameter of the part for a certain period. Time for reaching the creep damage rate is compared with time for reaching the creep distortion and the shorter time is used as a life.

9. 发明专利

JPH108904A GAS TURBINE DISK, AND GAS TURBINE 失效
公开(公告)号：JPH108904A
公开(公告)日：1998-01-13
申请号：JP15791296
申请日：1996-06-19
申请人： HITACHI LTD
发明人： SHIGA MASAO , NAKAMURA SHIGEYOSHI , KODAMA HIDEYO
IPC分类号： F01D5/02 , C22C38/00 , C22C38/48 , F02C7/00
摘要： PROBLEM TO BE SOLVED: To obtain a gas turbine, satisfying a mechanical property and having high thermal efficiency, by making the outer peripheral part of a gas turbine disk, composed of martensitic heat-proof steel, have material high in creep breaking strength than that of the center part, and by making the center part have material high in low-temperature toughness and high bearing strength in high-temperature than those of the outer peripheral part. SOLUTION: A high-temperature gas turbine, wherein a combustion gas inlet temperature becomes 1400 deg.C or more, is composed of a bucket, a stacking bolt, a spacer, and a disk, etc.; and in this case, the outer peripheral part of the disk is to be material having high creep braking strength, and the center part is to be material having low-temperature toughness and high bearing strength in 300 deg.C. Such the disk can be manufactured by installing an outer layer material 2 as an electrode in a space between a core material 1 and a water cooling casting die 5, and filling the space by an electroslug remelting method, to manufacture a composite steel block, thereby fairing it by hot forging. In this case, electroslug melting is preferably melted while relatively rotating the core material 1 and the outer layer material 2, in melting the electroslug.

10. 发明专利

JPH07233704A STEAM TURBINE POWER PLANT AND STEAM TURBINE 失效
公开(公告)号：JPH07233704A
公开(公告)日：1995-09-05
申请号：JP2396294
申请日：1994-02-22
申请人： HITACHI LTD
发明人： SHIGA MASAO , HIRAGA MAKOTO , ONODA TAKESHI , SHIMIZU NOBUO , YAMADA NORIO , KURIYAMA MITSUO , HIDAKA KISHIO , NAKAMURA SHIGEYOSHI , FUKUI HIROSHI , FUJITA TOSHIO
IPC分类号： F01D5/02 , B23K35/00 , B23K35/30 , C21D9/38 , C22C38/00 , F01D5/14 , F01D5/28 , F01D5/30 , F01D25/00 , F01K7/22
摘要： PURPOSE:To adopt a conventional basic design by determining steam temperature to an initial stage moving blade within a specific range in high, intermediate, and low pressure turbines, and composing a rotor shaft, moving and stationary blades, and a casing, exposed to the steam inlet temperature of the high and intermediate pressure turbines of high strength martensite steel containing Cr of a weight percent in a specific range. CONSTITUTION:Steam inlet temperature to an initial moving blade is determined at 610-660 deg.C in high and intermediate pressure turbines 562 and 53 and is determined at 380-475 deg.C in low pressure turbines 54 and 55. A rotor shaft, moving and stationary blades, and a casing exposed to the steam inlet temperature of the high and intermediate pressure turbines 52 and 53 are composed of high strength martensite steel containing 8-13wt.% of Cr. Consequently, a thermal power plant having a highly reliable large rotor can be manufactured.

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