DE2803024C3 - Hartmetallegierung und Verfahren zu ihrer Herstellung - Google Patents
Hartmetallegierung und Verfahren zu ihrer HerstellungInfo
- Publication number
- DE2803024C3 DE2803024C3 DE2803024A DE2803024A DE2803024C3 DE 2803024 C3 DE2803024 C3 DE 2803024C3 DE 2803024 A DE2803024 A DE 2803024A DE 2803024 A DE2803024 A DE 2803024A DE 2803024 C3 DE2803024 C3 DE 2803024C3
- Authority
- DE
- Germany
- Prior art keywords
- tungsten
- molybdenum
- mixed
- carbonitrides
- carbide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 238000000034 method Methods 0.000 title claims description 5
- 229910045601 alloy Inorganic materials 0.000 title description 3
- 239000000956 alloy Substances 0.000 title description 3
- 229910052751 metal Inorganic materials 0.000 claims description 32
- 239000002184 metal Substances 0.000 claims description 32
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 29
- 229910052757 nitrogen Inorganic materials 0.000 claims description 24
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 17
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 14
- 229910052750 molybdenum Inorganic materials 0.000 claims description 13
- 229910052721 tungsten Inorganic materials 0.000 claims description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 10
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 10
- 150000001247 metal acetylides Chemical class 0.000 claims description 10
- 239000010936 titanium Substances 0.000 claims description 10
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 10
- 239000010937 tungsten Substances 0.000 claims description 9
- 239000011733 molybdenum Substances 0.000 claims description 8
- 150000004767 nitrides Chemical class 0.000 claims description 8
- 239000010941 cobalt Substances 0.000 claims description 7
- 229910017052 cobalt Inorganic materials 0.000 claims description 7
- 238000005245 sintering Methods 0.000 claims description 7
- 229910052719 titanium Inorganic materials 0.000 claims description 7
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 229910052715 tantalum Inorganic materials 0.000 claims description 5
- 229910052735 hafnium Inorganic materials 0.000 claims description 4
- 229910052758 niobium Inorganic materials 0.000 claims description 4
- 239000010955 niobium Substances 0.000 claims description 4
- 229910052720 vanadium Inorganic materials 0.000 claims description 4
- 229910052726 zirconium Inorganic materials 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 claims description 3
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 3
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 3
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 3
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 description 20
- 150000002739 metals Chemical class 0.000 description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 11
- 239000013078 crystal Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 229910039444 MoC Inorganic materials 0.000 description 7
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000007792 addition Methods 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- CNEOGBIICRAWOH-UHFFFAOYSA-N methane;molybdenum Chemical compound C.[Mo] CNEOGBIICRAWOH-UHFFFAOYSA-N 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 229910003468 tantalcarbide Inorganic materials 0.000 description 3
- QIJNJJZPYXGIQM-UHFFFAOYSA-N 1lambda4,2lambda4-dimolybdacyclopropa-1,2,3-triene Chemical compound [Mo]=C=[Mo] QIJNJJZPYXGIQM-UHFFFAOYSA-N 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- -1 molybdenum-tungsten carbon dioxide Chemical group 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- INZDTEICWPZYJM-UHFFFAOYSA-N 1-(chloromethyl)-4-[4-(chloromethyl)phenyl]benzene Chemical compound C1=CC(CCl)=CC=C1C1=CC=C(CCl)C=C1 INZDTEICWPZYJM-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 229910000997 High-speed steel Inorganic materials 0.000 description 1
- 229910017263 Mo—C Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- XAYGUHUYDMLJJV-UHFFFAOYSA-Z decaazanium;dioxido(dioxo)tungsten;hydron;trioxotungsten Chemical compound [H+].[H+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O XAYGUHUYDMLJJV-UHFFFAOYSA-Z 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- WHJFNYXPKGDKBB-UHFFFAOYSA-N hafnium;methane Chemical compound C.[Hf] WHJFNYXPKGDKBB-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- UNASZPQZIFZUSI-UHFFFAOYSA-N methylidyneniobium Chemical compound [Nb]#C UNASZPQZIFZUSI-UHFFFAOYSA-N 0.000 description 1
- NFFIWVVINABMKP-UHFFFAOYSA-N methylidynetantalum Chemical compound [Ta]#C NFFIWVVINABMKP-UHFFFAOYSA-N 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 229910000476 molybdenum oxide Inorganic materials 0.000 description 1
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Inorganic materials O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 1
- MGRWKWACZDFZJT-UHFFFAOYSA-N molybdenum tungsten Chemical compound [Mo].[W] MGRWKWACZDFZJT-UHFFFAOYSA-N 0.000 description 1
- 229910052756 noble gas Inorganic materials 0.000 description 1
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000011833 salt mixture Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/04—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbonitrides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/082—Compounds containing nitrogen and non-metals and optionally metals
- C01B21/0828—Carbonitrides or oxycarbonitrides of metals, boron or silicon
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Inorganic Chemistry (AREA)
- Powder Metallurgy (AREA)
- Ceramic Products (AREA)
- Carbon And Carbon Compounds (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0049677A AT362943B (de) | 1977-01-27 | 1977-01-27 | Gesintertes hartmetall |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DE2803024A1 DE2803024A1 (de) | 1978-08-10 |
| DE2803024B2 DE2803024B2 (de) | 1980-07-10 |
| DE2803024C3 true DE2803024C3 (de) | 1984-01-12 |
Family
ID=3492145
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2803024A Expired DE2803024C3 (de) | 1977-01-27 | 1978-01-24 | Hartmetallegierung und Verfahren zu ihrer Herstellung |
| DE2857360A Expired DE2857360C2 (de) | 1977-01-27 | 1978-01-24 | Verfahren zur Herstellung eines Molybdän-Wolfram-Karbonitrides mit der Struktur von Wolframkarbid |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2857360A Expired DE2857360C2 (de) | 1977-01-27 | 1978-01-24 | Verfahren zur Herstellung eines Molybdän-Wolfram-Karbonitrides mit der Struktur von Wolframkarbid |
Country Status (10)
| Country | Link |
|---|---|
| US (2) | US4212671A (en, 2012) |
| JP (1) | JPS53104617A (en, 2012) |
| AT (1) | AT362943B (en, 2012) |
| BR (1) | BR7800491A (en, 2012) |
| CA (1) | CA1124751A (en, 2012) |
| DE (2) | DE2803024C3 (en, 2012) |
| FR (1) | FR2378732A1 (en, 2012) |
| GB (1) | GB1593326A (en, 2012) |
| IT (1) | IT1118207B (en, 2012) |
| SE (1) | SE420508B (en, 2012) |
Families Citing this family (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE425003B (sv) * | 1978-02-28 | 1982-08-23 | Sandvik Ab | Modifikation av molybden-volfram-karbonitrid enligt kraven i patentet 7800756-4 |
| GB2063922A (en) * | 1979-11-20 | 1981-06-10 | Metallurg Inc | Sintered hard metals |
| JPS5716161A (en) * | 1980-07-02 | 1982-01-27 | Ngk Spark Plug Co Ltd | Preparation of coating tip for cutting |
| JPS5747771A (en) * | 1980-09-06 | 1982-03-18 | Sumitomo Electric Industries | Sintered body for linedrawing dice and manufacture |
| DE3100266C2 (de) * | 1981-01-08 | 1993-11-18 | Sumitomo Electric Industries | Verfahren zur Herstellung von Mischcarbiden oder Mischcarbonitriden |
| US4610931A (en) * | 1981-03-27 | 1986-09-09 | Kennametal Inc. | Preferentially binder enriched cemented carbide bodies and method of manufacture |
| USRE34180E (en) * | 1981-03-27 | 1993-02-16 | Kennametal Inc. | Preferentially binder enriched cemented carbide bodies and method of manufacture |
| US4639352A (en) * | 1985-05-29 | 1987-01-27 | Sumitomo Electric Industries, Ltd. | Hard alloy containing molybdenum |
| US4857108A (en) * | 1986-11-20 | 1989-08-15 | Sandvik Ab | Cemented carbonitride alloy with improved plastic deformation resistance |
| US4990410A (en) * | 1988-05-13 | 1991-02-05 | Toshiba Tungaloy Co., Ltd. | Coated surface refined sintered alloy |
| US6057046A (en) * | 1994-05-19 | 2000-05-02 | Sumitomo Electric Industries, Ltd. | Nitrogen-containing sintered alloy containing a hard phase |
| CN1075125C (zh) | 1996-12-16 | 2001-11-21 | 住友电气工业株式会社 | 硬质合金、其制造方法及硬质合金工具 |
| US5756410A (en) * | 1997-02-27 | 1998-05-26 | The Dow Chemical Company | Method for making submicrometer transition metal carbonitrides |
| DK173814B1 (da) * | 1999-03-15 | 2001-11-12 | Topsoe Haldor As | Fremgangsmåde til fremstilling af ammoniak og katalysator til syntese af ammoniak |
| SE522845C2 (sv) * | 2000-11-22 | 2004-03-09 | Sandvik Ab | Sätt att tillverka ett skär sammansatt av olika hårdmetallsorter |
| JP4205946B2 (ja) * | 2000-12-19 | 2009-01-07 | 本田技研工業株式会社 | 複合材料 |
| WO2003004712A1 (en) * | 2001-07-03 | 2003-01-16 | Honda Giken Kogyo Kabushiki Kaisha | Multi-element ceramic powder and method for preparation thereof, and sintered compact and method for preparation thereof |
| SE0701761A0 (sv) | 2007-06-01 | 2008-12-02 | Sandvik Intellectual Property | Finkornig hårdmetall för svarvning i varmhållfasta superlegeringar (HRSA) och rostfria stål |
| SE0701449L (sv) | 2007-06-01 | 2008-12-02 | Sandvik Intellectual Property | Finkornig hårdmetall med förfinad struktur |
| US8455116B2 (en) | 2007-06-01 | 2013-06-04 | Sandvik Intellectual Property Ab | Coated cemented carbide cutting tool insert |
| DE102008040094A1 (de) | 2008-07-02 | 2009-01-29 | Basf Se | Verfahren zur Herstellung eines oxidischen geometrischen Formkörpers |
| DE102008040093A1 (de) | 2008-07-02 | 2008-12-18 | Basf Se | Verfahren zur Herstellung eines ringähnlichen oxidischen Formkörpers |
| KR20200050558A (ko) * | 2018-11-02 | 2020-05-12 | 서울대학교산학협력단 | 인성이 향상된 서멧트 및 그의 제조방법 |
| CN109399582B (zh) * | 2019-01-02 | 2022-05-31 | 吉林化工学院 | 块体材料氮化钼的高温高压制备 |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT49677B (de) * | 1909-06-18 | 1911-09-11 | James Gayley | Verfahren, Hochöfen und Konvertern Wind von annähernd gleichmäßiger Temperatur und annähernd gleichmäßigem Feuchtigkeitsgehalt zuzuführen. |
| US2036245A (en) * | 1932-01-11 | 1936-04-07 | Richard R Walter | Alloy |
| US3492100A (en) * | 1966-11-25 | 1970-01-27 | Centre Nat Rech Scient | Process for obtaining simple and mixed carbonitrides and oxycarbonitrides of transition metals and new metallic carbonitrides and oxycarbonitrides containing such metals |
| BE756565A (fr) * | 1969-09-30 | 1971-03-01 | Ugine Carbone | Alliages durs a base de nitrures |
| DE2420768A1 (de) * | 1973-06-18 | 1975-01-09 | Teledyne Ind | Karbonitridlegierungen fuer schneidwerkzeuge und verschleissteile |
| US3971656A (en) * | 1973-06-18 | 1976-07-27 | Erwin Rudy | Spinodal carbonitride alloys for tool and wear applications |
| US3994692A (en) * | 1974-05-29 | 1976-11-30 | Erwin Rudy | Sintered carbonitride tool materials |
| US4049876A (en) * | 1974-10-18 | 1977-09-20 | Sumitomo Electric Industries, Ltd. | Cemented carbonitride alloys |
| JPS5171809A (en) * | 1974-12-19 | 1976-06-22 | Ngk Spark Plug Co | Chitsukachitankishoketsugokinno seizoho |
| US4049380A (en) * | 1975-05-29 | 1977-09-20 | Teledyne Industries, Inc. | Cemented carbides containing hexagonal molybdenum |
| US4066451A (en) * | 1976-02-17 | 1978-01-03 | Erwin Rudy | Carbide compositions for wear-resistant facings and method of fabrication |
| US4120719A (en) * | 1976-12-06 | 1978-10-17 | Sumitomo Electric Industries, Ltd. | Cemented carbonitride alloys containing tantalum |
-
1977
- 1977-01-27 AT AT0049677A patent/AT362943B/de not_active IP Right Cessation
-
1978
- 1978-01-23 SE SE7800756A patent/SE420508B/sv not_active IP Right Cessation
- 1978-01-24 DE DE2803024A patent/DE2803024C3/de not_active Expired
- 1978-01-24 DE DE2857360A patent/DE2857360C2/de not_active Expired
- 1978-01-26 FR FR7802133A patent/FR2378732A1/fr active Granted
- 1978-01-26 JP JP819278A patent/JPS53104617A/ja active Granted
- 1978-01-26 CA CA295,749A patent/CA1124751A/en not_active Expired
- 1978-01-26 GB GB3243/78A patent/GB1593326A/en not_active Expired
- 1978-01-26 BR BR7800491A patent/BR7800491A/pt unknown
- 1978-01-27 US US05/872,926 patent/US4212671A/en not_active Expired - Lifetime
- 1978-01-27 IT IT19724/78A patent/IT1118207B/it active
-
1979
- 1979-12-12 US US06/102,963 patent/US4342594A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE2803024B2 (de) | 1980-07-10 |
| GB1593326A (en) | 1981-07-15 |
| ATA49677A (de) | 1978-08-15 |
| SE420508B (sv) | 1981-10-12 |
| US4212671A (en) | 1980-07-15 |
| SE7800756L (sv) | 1978-07-28 |
| AT362943B (de) | 1981-06-25 |
| US4342594A (en) | 1982-08-03 |
| DE2803024A1 (de) | 1978-08-10 |
| FR2378732B1 (en, 2012) | 1982-04-09 |
| JPS6146541B2 (en, 2012) | 1986-10-15 |
| FR2378732A1 (fr) | 1978-08-25 |
| BR7800491A (pt) | 1978-09-26 |
| DE2857360C2 (de) | 1983-05-11 |
| IT1118207B (it) | 1986-02-24 |
| CA1124751A (en) | 1982-06-01 |
| JPS53104617A (en) | 1978-09-12 |
| IT7819724A0 (it) | 1978-01-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
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