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1. 发明专利

JPH09209092A SECONDARY COMBUSTION CHAMBER MOUTHPIECE FOR DIESEL ENGINE 失效
公开(公告)号：JPH09209092A
公开(公告)日：1997-08-12
申请号：JP3730696
申请日：1996-01-31
申请人： MITSUBISHI MATERIALS CORP , MITSUBISHI MOTORS CORP
发明人： MATSUI TAKANORI , MIHASHI AKIRA , WAKITA SABURO , ASANO KENICHI , KAWAMOTO SUSUMU
IPC分类号： F02B19/08 , C22C38/00 , C22C38/54 , F02B19/16
摘要： PROBLEM TO BE SOLVED: To provide a secondary combustion chamber mouthpiece for diesel engine, excellent in high temp. strength, thermal fatigue resistance, and high temp. deformation resistance. SOLUTION: This mouthpiece is composed of a heat resistant stainless steel which has a composition consisting of 15-27% Cr, 1-8% Ni, 0.1-2.0% Mn, 0.1-2.0% Si, 0.3-2.5% Nb, 0.1-2.5% W, 0.002-0.1% Zr, 0.002-0.1% B, 0.06-0.2% C, 0.01-0.15% N, and the balance Fe with inevitable impurities and containing, if necessary, at least one kind among the following (a), (b), (c): (a) 0.01-2.0% of one or >=2 elements among Ta, Ti, and V; (b) 0.01-2.0% of one or >=2 elements among Mo, Co, and Cu; (c) either or both of 0.01-2.0% Al and 0.001-0.05% rare earth elements including Y. Further, this stainless steel has a three-phase structure consisting of, by volume, 20-80% of ferritic phase, 0.3-7% of carbonitride phase, and the balance austenitic phase.

2. 发明专利

JPH0849035A SHIFT FORK MADE OF WEAR RESISTANT ALUMINUM ALLOY HAVING EXCELLENT FATIGUE STRENGTH 失效
公开(公告)号：JPH0849035A
公开(公告)日：1996-02-20
申请号：JP20134794
申请日：1994-08-03
申请人： MITSUBISHI MATERIALS CORP , MITSUBISHI MOTORS CORP
发明人： OTSUKI MASATO , SAKAMOTO TOSHIO , KONO TORU , SAKAI MASAAKI , ASANO KENICHI , INOHARA HIDEO
IPC分类号： C22F1/043 , C22C21/02 , C22F1/00
摘要： PURPOSE:To impart excellent wear resistance and fatigue strength to a shift fork by subjecting an aluminum alloy added with Si and Cu to high pressure casting and subjecting the arm part of a shift fork having a structure in which fine primary crystal Si is dispersedly distributed into the matrix to shot peening treatment. CONSTITUTION:The compsn. of an alloy is constituted of the one contg., by weight, 13 to 17% Si, 2 to 6% Cu, and the balance Al with inevitable impurities, which is subjected to high pressure casting to form a shift fork. Moreover, this fork is the one having a structure in which primary crystal Si having 10 to 40mum average grain size is dispersedly distributed into the matrix, and in which compressive residual stress of >=5kg/mm is present at least on the arm surface part. In the case of the production, it is subjected to high pressure casting under 1000kgf/cm pressurizing force, is soaked at 500 deg.C for 4hr, is subjected to solution treatment for executing rapid cooling in warm water of 50 C and is subjected to aging treatment for executing heating at 170 deg.C for 8hr, and after that, the surface of the arm part is subjected to shot peening for 2 to 7min by using steel balls of 0.6mm.

3. 发明专利

DE69006610T2 未知
公开(公告)号：DE69006610T2
公开(公告)日：1994-05-26
申请号：DE69006610
申请日：1990-03-07
申请人： MITSUBISHI MOTORS CORP
发明人： MUSHIAKE MORIYUKI , ASANO KENICHI , MIYAMURA NORIYUKI
IPC分类号： C23C8/10 , C23C8/80
摘要： A method for treating the surface of a titanium alloy comprising a pretreatment process for cleaning a workpiece to be treated comprising a titanium alloy with an acid, a heating process for heating the pretreated workpiece in an oxidative atmosphere for a predetermined period of time to form a composite layer comprising oxide layers and oxygen-enriched layers on the surface of the workpiece, and a descaling process for rapidly quenching the treated workpiece to remove a scale layer formed as an outermost layer of the composite layer on the surface of the workpiece; or, without the pretreatment process, comprising the heating process, the descaling process, and and an aging process for aging by maintaining the workpiece at a predetermined temperature; or, comprising the pretreatment process, the heating process, the descaling process, and the aging process, thereby adequately improving the abrasion resistance and burning resistance of the workpiece and preventing an increase in abrasion of a partner part sliding with the titanium alloy part, thus improving the durability.

4. 发明专利

DE69006610D1 未知
公开(公告)号：DE69006610D1
公开(公告)日：1994-03-24
申请号：DE69006610
申请日：1990-03-07
申请人： MITSUBISHI MOTORS CORP
发明人： MUSHIAKE MORIYUKI , ASANO KENICHI , MIYAMURA NORIYUKI
IPC分类号： C23C8/10 , C23C8/80
摘要： A method for treating the surface of a titanium alloy comprising a pretreatment process for cleaning a workpiece to be treated comprising a titanium alloy with an acid, a heating process for heating the pretreated workpiece in an oxidative atmosphere for a predetermined period of time to form a composite layer comprising oxide layers and oxygen-enriched layers on the surface of the workpiece, and a descaling process for rapidly quenching the treated workpiece to remove a scale layer formed as an outermost layer of the composite layer on the surface of the workpiece; or, without the pretreatment process, comprising the heating process, the descaling process, and and an aging process for aging by maintaining the workpiece at a predetermined temperature; or, comprising the pretreatment process, the heating process, the descaling process, and the aging process, thereby adequately improving the abrasion resistance and burning resistance of the workpiece and preventing an increase in abrasion of a partner part sliding with the titanium alloy part, thus improving the durability.

5. 发明专利

JPH08157945A SPHEROIDAL GRAPHITE CAST IRON HAVING EXCELLENT VIBRATION ATTENUATABILITY AND ITS PRODUCTION 失效
公开(公告)号：JPH08157945A
公开(公告)日：1996-06-18
申请号：JP32954894
申请日：1994-12-02
申请人： SENSHIYUU KK , MITSUBISHI MOTORS CORP
发明人： NAGAI YASUO , KUMAZAWA KENICHI , ANDO SATOSHI , ASANO KENICHI
IPC分类号： C21D5/00 , C22C37/04
摘要： PURPOSE: To provide a spheroidal graphite case iron having excellent vibration attenuatability and a process for producing this cast iron. CONSTITUTION: The spheroidal graphite cast iron after casting is subjected to repetitively at least >=2 times annealing heat treatments, A1 to A4, for cooling the cast iron down to an eutectic transformation point or below after heating and to hold to and at 750 to 1100 deg.C. Base tissue adjusting heat treatments B1, B2, such as annealing and austempering, are executable after the final annealing heat treatment or in the cooling process thereof. The outer peripheral surfaces of the spheroidal graphite of the spheroidal graphite cast iron obtd. by such heat treatments are formed to rugged shapes; in addition, many fine gap parts are formed in the inner and outer peripheral parts of the graphite and the vibration attenuability is improved.

6. 发明专利

JPS6046962A SINTERING PART 失效
公开(公告)号：JPS6046962A
公开(公告)日：1985-03-14
申请号：JP15265883
申请日：1983-08-22
申请人： MITSUBISHI MOTORS CORP
发明人： HOUJIYOU NOBUYOSHI , ASANO KENICHI
IPC分类号： B22F1/00 , B22F1/02 , C04B35/00 , C04B35/628 , C22C1/05

7. 发明专利

JPS5980723A WHITE PIG IRON HARDENING DEVICE FOR SLIDING SURFACE OF CAM 失效
公开(公告)号：JPS5980723A
公开(公告)日：1984-05-10
申请号：JP19211982
申请日：1982-11-01
申请人： MITSUBISHI MOTORS CORP
发明人： HOUJIYOU NOBUYOSHI , ASANO KENICHI
IPC分类号： C21D5/00 , C21D1/09 , C21D9/30
摘要： PURPOSE:To increase the effective width of the sliding surface of a cam in a white pig iron hardening device for a sliding surface which heats and melts the sliding surface by a torch by pressing a backing strap to the angle part formed of the sliding surface and the side face of the cam from the side face and changing the shape of the angle part. CONSTITUTION:A cam 4 mounted with a backing strip 10 thereon after preheating of the cam 4 is so positioned that the sliding surface B-C at a juncture 7 is held horizontal. An electrode 8 of a torch 1 is placed opposite to the point A of the cam 4. The sliding surface is then heated and melted by connecting the electrode 8 and the cam 4 to a power source, running cooling water in the cooling water passage 13 of the plate 10, ejecting inert gas from a nozzle 9 and maintaining the electrode 8 at a negative potential. At the same time, a motor 2 is driven to move or stop properly the torch 1 by means of a driving device 3. Since the plate 10 is in contact with an angle part 12 in this white pig iron hardening device, the part 12 maintains the initial shape without changing even if the sliding surface is melted.

8. 发明专利

JPH09250316A VALVE MECHANISM FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH09250316A
公开(公告)日：1997-09-22
申请号：JP5515696
申请日：1996-03-12
申请人： MITSUBISHI MOTORS CORP
发明人： SASAKI MASAJI , ASANO KENICHI
IPC分类号： F01L3/02 , C23C22/18 , F01L3/04 , F01L3/10
摘要： PROBLEM TO BE SOLVED: To restrain the fretting wear of a cotter at the contact part in a valve stem part, and to enhance the fatigue strength of an intake valve and an exhaust valve so that the occurrence of crack can be prevented, in a valve mechanism for an internal combustion engine having a poppet valve and a cotter that have been provided as an intake valve or exhaust valve for an internal combustion engine. SOLUTION: In a valve mechanism for an internal combustion engine made up of a poppet valve having a valve stem part 16 which has been provided as an intake valve or exhaust valve for an internal combustion engine, and to which a cotter 26 for fitting a valve spring retainer is externally fitted, the poppet valve is made of the β-type titanium alloy, and also the cotter 26 is made of a carbon steel material, and further the cotter 26 is subjected to the surface treatment of manganese phosphate coat 28.

9. 发明专利

JPH09195730A VALVE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH09195730A
公开(公告)日：1997-07-29
申请号：JP343396
申请日：1996-01-11
申请人： MITSUBISHI MOTORS CORP
发明人： SASAKI MASAJI , ASANO KENICHI
IPC分类号： F01L3/02 , C21D7/06 , F01L3/10
摘要： PROBLEM TO BE SOLVED: To improve fatigue strength of such an intake valve or exhaust valve by reducing fretting corrosion, etc., in a contact part with a cotter in the valve stem part, regarding to a valve for internal combustion engine comprised of a poppet valve and provided as an intake valve or exhaust valve for the internal combustion engine. SOLUTION: This valve is provided as intake or exhaust valve for internal combustion engine, comprised of a poppet valve having a valve stem part 16 externally fitted with a cotter 26 for attaching a valve spring retainer. In this case, a shot peening finish 28 is applied on the fitting surface 16A with the cotter 26 at the outer periphery of the valve stem part 16.

10. 发明专利

JPH09195729A POPPET VALVE MADE OF TITANIUM ALLOY 失效
公开(公告)号：JPH09195729A
公开(公告)日：1997-07-29
申请号：JP343296
申请日：1996-01-11
申请人： MITSUBISHI MOTORS CORP
发明人： SASAKI MASAJI , ASANO KENICHI
IPC分类号： F01L3/02 , C23C8/48 , C23C28/04
摘要： PROBLEM TO BE SOLVED: To assure seizure resistance, wear resistance, etc., for a long term in a poppet valve made of titanium alloy which is suitable to be used for the intake and exhaust valves of an internal combustion engine. SOLUTION: The poppet valve is provided as an intake valve or an exhaust valve in an internal combustion engine, and formed out of beta type titanium alloy material. On the surface of the base material, an oxidation treatment is applied for forming an oxide layer, which comprises, in the order from the surface side, first layer 30 mainly consisting of TiO2 and Al2 O3 , second layer 31 of TiO2 , Ti, and Al2 O3 , third layer 32 of TiO2 , Ti, Al2 O3 , and Al, and fourth layer 33 of Ti, Al2 O3 , and Al.

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