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1. 发明专利

JPH05195024A METHOD FOR PREVENTING OXIDATION OF METAL POWDER DURING PRODUCTION OF METAL POWDER 失效
公开(公告)号：JPH05195024A
公开(公告)日：1993-08-03
申请号：JP2335792
申请日：1992-01-14
申请人： NIPPON STEEL CORP , DAIDO KAGAKU KOGYO
发明人： NISHIDA TAKUHIKO , YAMAMIYA MASAO , SENDA SUSUMU , TANIGAWA KEIICHI , TAKAHASHI HIROYUKI , NORO KAZUYA
IPC分类号： B22F9/08
摘要： PURPOSE:To prevent the oxidation of metal powder when this metal powder is produced by water atomization. CONSTITUTION:When metal powder is produced from a molten metal by water atomization, an aq. soln. contg. an org. acid is used as an atomizing medium. An amino acid is preferably used as the org. acid and the org. acid may be used in combination with benzotriazoles. The pH of the aq. soln. is preferably adjusted to a range of >=7. The oxidation of the metal powder can be prevented.

2. 发明专利

JPH07278609A PRODUCTION OF HIGH-DENSITY SINTERED TITANIUM ALLOY 失效
公开(公告)号：JPH07278609A
公开(公告)日：1995-10-24
申请号：JP7110994
申请日：1994-04-08
申请人： NIPPON STEEL CORP , TOHO TITANIUM CO LTD
发明人： FUJII HIDEKI , TAKAKU NOBORU , YAMAMIYA MASAO , KAGOHASHI WATARU , FUKAZAWA HIDEKAZU , KONO MICHIHARU
IPC分类号： B22F3/10 , B22F9/02 , C22C1/04
摘要： PURPOSE:To produce a sintered Ti alloy at a low cost at the time of producing a sintered Ti alloy product by a powder metallurgical process from a Ti powder which has been hydrogenated and then dehydrogenated and having a specified content of hydrogen by heating the compact consisting essentially of Ti powder under specified conditions and then sintering the compact. CONSTITUTION:The hydrogen content of the Ti produced by the hydrogenation- dehydrogenation process is controlled to about 0.02-2wt.%, which is higher than the allowable hydrogen content, i.e., =1hr to close the void due to the hydrogen liberated during the dehydrogenation, and a high-density sintered Ti alloy product is inexpensively produced at a low heating cost.

3. 发明专利

JPH04279253A TWIN ROLL TYPE CASTING METHOD FOR PHOSPHOR BRONZE STRIP HAVING EXCELLENT INTERNAL CHARACTERISTIC 失效
公开(公告)号：JPH04279253A
公开(公告)日：1992-10-05
申请号：JP3880591
申请日：1991-03-05
申请人： NIPPON STEEL CORP
发明人： UEJIMA YOSHIYUKI , YAMAMIYA MASAO , MIZOGUCHI TOSHIAKI , MIYAZAWA KENICHI
IPC分类号： B22D11/06 , B22D11/00
摘要： PURPOSE:To prevent the development of center porosity by eliminating fine equiaxed crystal zone in the center of a strip, because internal characteristic deteriorates at the time of directly casting phosphor bronze into the strip with a twin roll type caster. CONSTITUTION:At the time of directly casting the strip by pouring the molten phosphor bronze into the twin roll type continuous caster, pouring temp. is adjusted to 70-200 deg.C excess heating temp. to the molten metal and casting is executed under condition, which relation of roll rotating speed and roll diameter satisfies the following inequality to cast the phosphor bronze strip having excellent internal characteristic. 1050

4. 发明专利

JPS5438258A PREPARATION OF LONG FLAT IRON POWDER USED PLURAL FIXED COOLING PLATE 失效
公开(公告)号：JPS5438258A
公开(公告)日：1979-03-22
申请号：JP10434777
申请日：1977-08-31
申请人： NIPPON STEEL CORP
发明人： SEKINO AKIZOU , NISHIDA TAKUHIKO , YAMAMIYA MASAO
IPC分类号： B22F9/08
摘要： PURPOSE:To easily and cheaply manufacture the long flat iron powder having more than a specific aspect ratio suitable for composite material, by letting collide unsolidified molten drops powdered by gasatomizing against plural fixed cooling plate placing its scattering at a specific angle and soldifying by quenching. placing its scattering direction at a specific angle and soldifying by quenching.

5. 发明专利

JPH07118710A HYDROGENATION METHOD IN PRODUCTION OF TITANIUM POWDER 失效
公开(公告)号：JPH07118710A
公开(公告)日：1995-05-09
申请号：JP26665393
申请日：1993-10-25
申请人： NIPPON STEEL CORP , TOHO TITANIUM CO LTD
发明人： TAKAKU NOBORU , FUJII HIDEKI , YAMAMIYA MASAO , TAMURA MICHIO , KAGOHASHI WATARU , FUKAZAWA HIDEKAZU , MURAYAMA RYOJI
IPC分类号： B22F9/04
摘要： PURPOSE:To relax restrictions on the raw titanium material to be hydrogenated, to reduce the cutting cost and further to improve productivity in hydrogenation in the production of tiatnium powder by hydrogenation and dehydrogenation. CONSTITUTION:The raw titanium having bulk density, placed in a treating vessel and hydrogenated. Concretely, a raw titanium low in bulk density is compressed to fill a raw tiatnium low in bulk density between the raw titanium materials high in bulk density, and the bulk density is controlled.

6. 发明专利

JPH0754017A METHOD AND APPARATUS FOR PRODUCING TITANIUM POWDER 失效
公开(公告)号：JPH0754017A
公开(公告)日：1995-02-28
申请号：JP20519893
申请日：1993-08-19
申请人： NIPPON STEEL CORP , TOHO TITANIUM CO LTD
发明人： TAKAKU NOBORU , FUJII HIDEKI , YAMAMIYA MASAO , TAMURA MICHIO , KAGOHASHI WATARU , FUKAZAWA HIDEKAZU , MURAYAMA RYOJI
IPC分类号： B22F9/04 , B22F9/28
摘要： PURPOSE:To efficiently and economically produce the titanium powder by utilizing the gaseous hydrogen produced in a dehydrogenation treatment of titanium hydride powder for the hydrogenation treatment of raw material titanium and utilizing the heat generated in this treatment for dehydrogenation. CONSTITUTION:A hydrogenation vessel 1 housing the raw material titanium 13 and a hydrogenation vessel 2 housing the titanium hydride powder 14 put into tray-shaped containers 15 internally heaving heaters 4 are arranged into a heat treatment furnace 3 having furnace wall heaters 5. A specified pressure and temp. are maintained in the furnace. Gaseous H2 is then supplied to hydrogenate the raw material titanium 1 and thereafter, the raw material titanium is pulverized, by which the titanium hydride powder is obtd. On the other hand, the titanium hydride powder 14 is subjected to the dehydrogenation treatment, by which the titanium powder is obtd. The gaseous hydrogen produced in the dehydrogenation treatment at that time is supplied through a discharge pipe 7, a pump 10 and an introducing pipe 6 to the hydrogenation vessel 1 and is utilized for the hydrogenation treatment of the raw material titanium 13. On the other hand, the heat generated in the hydrogenation treatment of the exothermic reaction is supplied to the dehydrogenation vessel 2 and is utilized for the dehydrogenation treatment of the endothermic reaction.

7. 发明专利

JPH06279801A PRODUCTION OF COMPOSITE POWDER CONSISTING OF TITANIUM POWDER AND BASE ALLOY POWDER 失效
公开(公告)号：JPH06279801A
公开(公告)日：1994-10-04
申请号：JP6879593
申请日：1993-03-26
申请人： NIPPON STEEL CORP , TOHO TITANIUM CO LTD
发明人： FUJII HIDEKI , YAMAZAKI TATSUO , YAMAMIYA MASAO
IPC分类号： B22F1/00 , C22C14/00
摘要： PURPOSE:To provide the process for production of the composite powder in which base alloy powder is gently bonded to the circumference of titanium powder. CONSTITUTION:Hydrogenated titanium ingots and base alloy ingots are mixed, are mechanically pulverized and are then heated and held within >=10 minutes and Torr. The mixture is otherwise mechanically pulverized again after the stages mentioned above are executed. As a result, homogeneous powder packing is made possible without impairing the excellent molding characteristics of the titanium powder and consequently, powder metallurgical titanium alloy products having uniform material quality characteristics free from segregation are produced.

8. 发明专利

JPH01219102A FE-NI-B ALLOY POWDER AS ADDITIVE FOR SINTERING AND SINTERING METHOD THEREOF 失效
公开(公告)号：JPH01219102A
公开(公告)日：1989-09-01
申请号：JP4188488
申请日：1988-02-26
申请人： NIPPON STEEL CORP
发明人： NISHIDA TAKUHIKO , YAMAMIYA MASAO , SENDA SUSUMU
IPC分类号： B22F1/00 , C22C19/03 , C22C33/02 , C22C38/00 , C22C38/08
摘要： PURPOSE:To produce a high density sintered product having superior strength and elongation by mixing iron-based matrix powder with a specified amt. of Fe-Ni-B alloy powder having a specified compsn. and a specified average particle size, molding the mixture and heating it under specified conditions. CONSTITUTION:An Fe-Ni-B alloy ingot consisting of 1-50wt.% Fe, 320wt.% B and the balance Ni with inevitable impurities is cast, crushed and pulverized to form powder having

9. 发明专利

JPS5438259A PREPARATION OF LONG FLAT IRON POWDER FROM MOLTEN STEEL UTILIZING CETRIFUGAL FORCE 失效
公开(公告)号：JPS5438259A
公开(公告)日：1979-03-22
申请号：JP10434877
申请日：1977-08-31
申请人： NIPPON STEEL CORP
发明人： SEKINO AKIZOU , NISHIDA TAKUHIKO , YAMAMIYA MASAO
IPC分类号： B22F9/10
摘要： PURPOSE:To easily and cheaply manufacture the long flat iron powder having more than a specific aspect ratio suitable for composite material, by letting collide unsolidified molten drops scattedred by centrifugal force of rotating body against inclined cooling plate cooled the inner part and solidifying by quenching.

10. 发明专利

JPH0776706A HEATING METHOD AND DEVICE FOR TITANIUM POWDER PRODUCTION 失效
公开(公告)号：JPH0776706A
公开(公告)日：1995-03-20
申请号：JP22262593
申请日：1993-09-07
申请人： NIPPON STEEL CORP , TOHO TITANIUM CO LTD
发明人： TAKAKU NOBORU , FUJII HIDEKI , YAMAMIYA MASAO , TAMURA MICHIO , KAGOHASHI WATARU , FUKAZAWA HIDEKAZU , MURAYAMA RYOJI
IPC分类号： B22F1/00 , B22F8/00 , B22F9/04
摘要： PURPOSE:To improve productivity and to reduce a production cost by enhancing heating efficiency and shortening the heating time at the time of a hydrogenation treatment and dehydrogenation treatment in production of titanium powder by a hydrogenation and dehydrogenation method. CONSTITUTION:This heating method comprises charging raw material titanium 13 or titanium hydride powder into a vessel 1 and heating the titanium powder by heaters 4, 5 arranged on the outer side and inside of the vessel 1. The heating device consists of the hydrogenation treating vessel 1 or the dehydrogenation treating vessel and a furnace 3 covering this vessel, is provided with a hollow part exclusive at the central part of the hydrogenation treating vessel of a gap made to remain in the upper part in the vessel, is provided with the hollow part 6 at the central part of the dehydrogenation treating vessel 1 and has an internal heater in this hollow part 6 and a furnace wall heater 5 on the inside wall of the furnace 3.

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