SE453053B - Sett att konsolidera pulver av metalliskt och icke-metalliskt material - Google Patents
Sett att konsolidera pulver av metalliskt och icke-metalliskt materialInfo
- Publication number
- SE453053B SE453053B SE8006254A SE8006254A SE453053B SE 453053 B SE453053 B SE 453053B SE 8006254 A SE8006254 A SE 8006254A SE 8006254 A SE8006254 A SE 8006254A SE 453053 B SE453053 B SE 453053B
- Authority
- SE
- Sweden
- Prior art keywords
- container
- powder
- temperature
- article
- melting
- Prior art date
Links
- 239000007769 metal material Substances 0.000 title claims description 3
- 239000000843 powder Substances 0.000 claims description 43
- 238000002844 melting Methods 0.000 claims description 28
- 230000008018 melting Effects 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 13
- 238000007596 consolidation process Methods 0.000 claims description 10
- 230000002706 hydrostatic effect Effects 0.000 claims description 5
- 238000005056 compaction Methods 0.000 claims description 4
- 238000000280 densification Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 9
- 239000012611 container material Substances 0.000 description 7
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 230000002411 adverse Effects 0.000 description 5
- 238000003754 machining Methods 0.000 description 5
- 230000000704 physical effect Effects 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 238000005266 casting Methods 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000000155 melt Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000010273 cold forging Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
- B22F3/15—Hot isostatic pressing
- B22F3/156—Hot isostatic pressing by a pressure medium in liquid or powder form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/1208—Containers or coating used therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
- B22F3/15—Hot isostatic pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
- B28B7/342—Moulds, cores, or mandrels of special material, e.g. destructible materials which are at least partially destroyed, e.g. broken, molten, before demoulding; Moulding surfaces or spaces shaped by, or in, the ground, or sand or soil, whether bound or not; Cores consisting at least mainly of sand or soil, whether bound or not
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/001—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a flexible element, e.g. diaphragm, urged by fluid pressure; Isostatic presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Powder Metallurgy (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Manufacture And Refinement Of Metals (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US7362779A | 1979-09-10 | 1979-09-10 | |
| US06/173,648 US4341557A (en) | 1979-09-10 | 1980-07-30 | Method of hot consolidating powder with a recyclable container material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE8006254L SE8006254L (sv) | 1981-03-11 |
| SE453053B true SE453053B (sv) | 1988-01-11 |
Family
ID=26754704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE8006254A SE453053B (sv) | 1979-09-10 | 1980-09-09 | Sett att konsolidera pulver av metalliskt och icke-metalliskt material |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US4341557A (pt) |
| BR (1) | BR8005683A (pt) |
| CA (1) | CA1163838A (pt) |
| CH (1) | CH649236A5 (pt) |
| DE (1) | DE3033225C2 (pt) |
| FR (1) | FR2464772B1 (pt) |
| GB (1) | GB2062685B (pt) |
| IL (1) | IL61019A (pt) |
| IT (1) | IT1172255B (pt) |
| MX (1) | MX154018A (pt) |
| NO (1) | NO156157C (pt) |
| SE (1) | SE453053B (pt) |
Families Citing this family (73)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3142646C2 (de) * | 1981-10-28 | 1985-10-17 | Deutsche Gesellschaft für Wiederaufarbeitung von Kernbrennstoffen mbH, 3000 Hannover | Brennelementbehälter zum Transportieren und/oder Lagern von Kernreaktorbrennelementen |
| EP0190346A4 (en) * | 1984-08-08 | 1987-01-22 | Dow Chemical Co | Novel composite ceramics with improved toughness. |
| JPS6199605A (ja) * | 1984-10-18 | 1986-05-17 | Hitachi Zosen Corp | 熱間静水圧圧縮焼成法 |
| KR900007839B1 (ko) * | 1986-01-27 | 1990-10-20 | 더 다우 케미칼 캄파니 | 인성이 개선된 복합 세라믹 및 이의 제조방법 |
| US4744943A (en) * | 1986-12-08 | 1988-05-17 | The Dow Chemical Company | Process for the densification of material preforms |
| US5075053A (en) * | 1988-08-04 | 1991-12-24 | Gte Valenite Corporation | Method of making cutting insert |
| US4923512A (en) * | 1989-04-07 | 1990-05-08 | The Dow Chemical Company | Cobalt-bound tungsten carbide metal matrix composites and cutting tools formed therefrom |
| US5066454A (en) * | 1990-06-20 | 1991-11-19 | Industrial Materials Technology, Inc. | Isostatic processing with shrouded melt-away mandrel |
| US5227576A (en) * | 1991-03-14 | 1993-07-13 | Industrial Materials Technology | Method for forming complex patterns in the interior of a pressed part formed of compacted particulate material, and apparatus |
| US5232522A (en) * | 1991-10-17 | 1993-08-03 | The Dow Chemical Company | Rapid omnidirectional compaction process for producing metal nitride, carbide, or carbonitride coating on ceramic substrate |
| US5156725A (en) * | 1991-10-17 | 1992-10-20 | The Dow Chemical Company | Method for producing metal carbide or carbonitride coating on ceramic substrate |
| US5880382A (en) * | 1996-08-01 | 1999-03-09 | Smith International, Inc. | Double cemented carbide composites |
| US6170583B1 (en) | 1998-01-16 | 2001-01-09 | Dresser Industries, Inc. | Inserts and compacts having coated or encrusted cubic boron nitride particles |
| US6102140A (en) * | 1998-01-16 | 2000-08-15 | Dresser Industries, Inc. | Inserts and compacts having coated or encrusted diamond particles |
| US6138779A (en) * | 1998-01-16 | 2000-10-31 | Dresser Industries, Inc. | Hardfacing having coated ceramic particles or coated particles of other hard materials placed on a rotary cone cutter |
| US6065552A (en) * | 1998-07-20 | 2000-05-23 | Baker Hughes Incorporated | Cutting elements with binderless carbide layer |
| US6932145B2 (en) | 1998-11-20 | 2005-08-23 | Rolls-Royce Corporation | Method and apparatus for production of a cast component |
| US7343960B1 (en) * | 1998-11-20 | 2008-03-18 | Rolls-Royce Corporation | Method and apparatus for production of a cast component |
| US6454027B1 (en) | 2000-03-09 | 2002-09-24 | Smith International, Inc. | Polycrystalline diamond carbide composites |
| US6615935B2 (en) * | 2001-05-01 | 2003-09-09 | Smith International, Inc. | Roller cone bits with wear and fracture resistant surface |
| TWI291458B (en) * | 2001-10-12 | 2007-12-21 | Phild Co Ltd | Method and device for producing titanium-containing high performance water |
| EP1997575B1 (en) * | 2001-12-05 | 2011-07-27 | Baker Hughes Incorporated | Consolidated hard material and applications |
| US7017677B2 (en) * | 2002-07-24 | 2006-03-28 | Smith International, Inc. | Coarse carbide substrate cutting elements and method of forming the same |
| US7407525B2 (en) * | 2001-12-14 | 2008-08-05 | Smith International, Inc. | Fracture and wear resistant compounds and down hole cutting tools |
| US7243744B2 (en) | 2003-12-02 | 2007-07-17 | Smith International, Inc. | Randomly-oriented composite constructions |
| US20050262774A1 (en) * | 2004-04-23 | 2005-12-01 | Eyre Ronald K | Low cobalt carbide polycrystalline diamond compacts, methods for forming the same, and bit bodies incorporating the same |
| US9428822B2 (en) | 2004-04-28 | 2016-08-30 | Baker Hughes Incorporated | Earth-boring tools and components thereof including material having hard phase in a metallic binder, and metallic binder compositions for use in forming such tools and components |
| US20050211475A1 (en) * | 2004-04-28 | 2005-09-29 | Mirchandani Prakash K | Earth-boring bits |
| US20060024140A1 (en) * | 2004-07-30 | 2006-02-02 | Wolff Edward C | Removable tap chasers and tap systems including the same |
| US7513320B2 (en) | 2004-12-16 | 2009-04-07 | Tdy Industries, Inc. | Cemented carbide inserts for earth-boring bits |
| US7441610B2 (en) * | 2005-02-25 | 2008-10-28 | Smith International, Inc. | Ultrahard composite constructions |
| US8637127B2 (en) | 2005-06-27 | 2014-01-28 | Kennametal Inc. | Composite article with coolant channels and tool fabrication method |
| US7687156B2 (en) | 2005-08-18 | 2010-03-30 | Tdy Industries, Inc. | Composite cutting inserts and methods of making the same |
| US7776256B2 (en) | 2005-11-10 | 2010-08-17 | Baker Huges Incorporated | Earth-boring rotary drill bits and methods of manufacturing earth-boring rotary drill bits having particle-matrix composite bit bodies |
| US7997359B2 (en) * | 2005-09-09 | 2011-08-16 | Baker Hughes Incorporated | Abrasive wear-resistant hardfacing materials, drill bits and drilling tools including abrasive wear-resistant hardfacing materials |
| US8002052B2 (en) | 2005-09-09 | 2011-08-23 | Baker Hughes Incorporated | Particle-matrix composite drill bits with hardfacing |
| US7597159B2 (en) | 2005-09-09 | 2009-10-06 | Baker Hughes Incorporated | Drill bits and drilling tools including abrasive wear-resistant materials |
| US7703555B2 (en) * | 2005-09-09 | 2010-04-27 | Baker Hughes Incorporated | Drilling tools having hardfacing with nickel-based matrix materials and hard particles |
| US7784567B2 (en) * | 2005-11-10 | 2010-08-31 | Baker Hughes Incorporated | Earth-boring rotary drill bits including bit bodies comprising reinforced titanium or titanium-based alloy matrix materials, and methods for forming such bits |
| US7802495B2 (en) * | 2005-11-10 | 2010-09-28 | Baker Hughes Incorporated | Methods of forming earth-boring rotary drill bits |
| US7807099B2 (en) * | 2005-11-10 | 2010-10-05 | Baker Hughes Incorporated | Method for forming earth-boring tools comprising silicon carbide composite materials |
| US8770324B2 (en) | 2008-06-10 | 2014-07-08 | Baker Hughes Incorporated | Earth-boring tools including sinterbonded components and partially formed tools configured to be sinterbonded |
| US7913779B2 (en) * | 2005-11-10 | 2011-03-29 | Baker Hughes Incorporated | Earth-boring rotary drill bits including bit bodies having boron carbide particles in aluminum or aluminum-based alloy matrix materials, and methods for forming such bits |
| CN103312486B (zh) * | 2006-04-27 | 2017-12-26 | 德克萨斯仪器股份有限公司 | 在无线通信系统中分配参考信号的方法和装置 |
| RU2432445C2 (ru) | 2006-04-27 | 2011-10-27 | Ти Ди Уай Индастриз, Инк. | Модульное буровое долото с неподвижными режущими элементами, корпус данного модульного бурового долота и способы их изготовления |
| CA2662966C (en) * | 2006-08-30 | 2012-11-13 | Baker Hughes Incorporated | Methods for applying wear-resistant material to exterior surfaces of earth-boring tools and resulting structures |
| EP2078101A2 (en) | 2006-10-25 | 2009-07-15 | TDY Industries, Inc. | Articles having improved resistance to thermal cracking |
| US7775287B2 (en) * | 2006-12-12 | 2010-08-17 | Baker Hughes Incorporated | Methods of attaching a shank to a body of an earth-boring drilling tool, and tools formed by such methods |
| US7841259B2 (en) * | 2006-12-27 | 2010-11-30 | Baker Hughes Incorporated | Methods of forming bit bodies |
| US8821603B2 (en) * | 2007-03-08 | 2014-09-02 | Kennametal Inc. | Hard compact and method for making the same |
| US7846551B2 (en) * | 2007-03-16 | 2010-12-07 | Tdy Industries, Inc. | Composite articles |
| US8202344B2 (en) | 2007-05-21 | 2012-06-19 | Kennametal Inc. | Cemented carbide with ultra-low thermal conductivity |
| US8790439B2 (en) | 2008-06-02 | 2014-07-29 | Kennametal Inc. | Composite sintered powder metal articles |
| EP2653580B1 (en) | 2008-06-02 | 2014-08-20 | Kennametal Inc. | Cemented carbide-metallic alloy composites |
| US7703556B2 (en) | 2008-06-04 | 2010-04-27 | Baker Hughes Incorporated | Methods of attaching a shank to a body of an earth-boring tool including a load-bearing joint and tools formed by such methods |
| US20090301788A1 (en) * | 2008-06-10 | 2009-12-10 | Stevens John H | Composite metal, cemented carbide bit construction |
| US20090308662A1 (en) * | 2008-06-11 | 2009-12-17 | Lyons Nicholas J | Method of selectively adapting material properties across a rock bit cone |
| WO2010002629A2 (en) * | 2008-07-02 | 2010-01-07 | Baker Hughes Incorporated | Method to reduce carbide erosion of pdc cutter |
| US8261632B2 (en) * | 2008-07-09 | 2012-09-11 | Baker Hughes Incorporated | Methods of forming earth-boring drill bits |
| US8322465B2 (en) | 2008-08-22 | 2012-12-04 | TDY Industries, LLC | Earth-boring bit parts including hybrid cemented carbides and methods of making the same |
| US8025112B2 (en) | 2008-08-22 | 2011-09-27 | Tdy Industries, Inc. | Earth-boring bits and other parts including cemented carbide |
| US9139893B2 (en) | 2008-12-22 | 2015-09-22 | Baker Hughes Incorporated | Methods of forming bodies for earth boring drilling tools comprising molding and sintering techniques |
| US20100230177A1 (en) * | 2009-03-10 | 2010-09-16 | Baker Hughes Incorporated | Earth-boring tools with thermally conductive regions and related methods |
| US20100230176A1 (en) * | 2009-03-10 | 2010-09-16 | Baker Hughes Incorporated | Earth-boring tools with stiff insert support regions and related methods |
| US8272816B2 (en) | 2009-05-12 | 2012-09-25 | TDY Industries, LLC | Composite cemented carbide rotary cutting tools and rotary cutting tool blanks |
| US8201610B2 (en) | 2009-06-05 | 2012-06-19 | Baker Hughes Incorporated | Methods for manufacturing downhole tools and downhole tool parts |
| US8308096B2 (en) | 2009-07-14 | 2012-11-13 | TDY Industries, LLC | Reinforced roll and method of making same |
| US9643236B2 (en) | 2009-11-11 | 2017-05-09 | Landis Solutions Llc | Thread rolling die and method of making same |
| EP2571647A4 (en) | 2010-05-20 | 2017-04-12 | Baker Hughes Incorporated | Methods of forming at least a portion of earth-boring tools, and articles formed by such methods |
| WO2011146760A2 (en) | 2010-05-20 | 2011-11-24 | Baker Hughes Incorporated | Methods of forming at least a portion of earth-boring tools, and articles formed by such methods |
| RU2012155101A (ru) | 2010-05-20 | 2014-06-27 | Бейкер Хьюз Инкорпорейтед | Способы формирования по меньшей мере части бурильного инструмента |
| US8800848B2 (en) | 2011-08-31 | 2014-08-12 | Kennametal Inc. | Methods of forming wear resistant layers on metallic surfaces |
| US9016406B2 (en) | 2011-09-22 | 2015-04-28 | Kennametal Inc. | Cutting inserts for earth-boring bits |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3230286A (en) | 1961-01-23 | 1966-01-18 | Engelhard Ind Inc | Compacting of particulate materials |
| CA855149A (en) * | 1968-02-28 | 1970-11-03 | J. Havel Charles | Hot isostatic pressing using a vitreous container |
| US3907949A (en) * | 1970-10-27 | 1975-09-23 | Westinghouse Electric Corp | Method of making tubular polycrystalline oxide body with tapered ends |
| US3866303A (en) * | 1973-06-27 | 1975-02-18 | Bethlehem Steel Corp | Method of making cross-rolled powder metal discs |
| DE2336093C2 (de) * | 1973-07-16 | 1983-05-26 | Hoechst Ag, 6230 Frankfurt | Elektrophotographisches Aufzeichnungsmaterial |
| SE394178B (sv) * | 1975-02-03 | 1977-06-13 | Asea Ab | Forfarande for varmpressning av pulverkroppar |
| US4023966A (en) * | 1975-11-06 | 1977-05-17 | United Technologies Corporation | Method of hot isostatic compaction |
| DE2724524B2 (de) * | 1976-06-03 | 1979-04-05 | Kelsey-Hayes Co., Romulus, Mich. (V.St.A.) | Behalter zum Heißpressen von Formkörpern verwickelter Gestalt aus Pulver |
| US4142888A (en) * | 1976-06-03 | 1979-03-06 | Kelsey-Hayes Company | Container for hot consolidating powder |
| US4094709A (en) * | 1977-02-10 | 1978-06-13 | Kelsey-Hayes Company | Method of forming and subsequently heat treating articles of near net shaped from powder metal |
-
1980
- 1980-07-30 US US06/173,648 patent/US4341557A/en not_active Expired - Lifetime
- 1980-09-04 DE DE3033225A patent/DE3033225C2/de not_active Expired
- 1980-09-05 BR BR8005683A patent/BR8005683A/pt not_active IP Right Cessation
- 1980-09-09 MX MX183866A patent/MX154018A/es unknown
- 1980-09-09 CA CA000359924A patent/CA1163838A/en not_active Expired
- 1980-09-09 IT IT49638/80A patent/IT1172255B/it active
- 1980-09-09 GB GB8029025A patent/GB2062685B/en not_active Expired
- 1980-09-09 SE SE8006254A patent/SE453053B/sv not_active IP Right Cessation
- 1980-09-09 NO NO802667A patent/NO156157C/no unknown
- 1980-09-09 CH CH6779/80A patent/CH649236A5/de not_active IP Right Cessation
- 1980-09-09 FR FR8019455A patent/FR2464772B1/fr not_active Expired
- 1980-09-10 IL IL61019A patent/IL61019A/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE3033225A1 (de) | 1981-03-19 |
| IT8049638A0 (it) | 1980-09-09 |
| IL61019A (en) | 1983-11-30 |
| CA1163838A (en) | 1984-03-20 |
| GB2062685B (en) | 1983-08-10 |
| NO156157C (no) | 1987-08-05 |
| CH649236A5 (de) | 1985-05-15 |
| FR2464772B1 (fr) | 1985-08-16 |
| US4341557A (en) | 1982-07-27 |
| FR2464772A1 (fr) | 1981-03-20 |
| NO802667L (no) | 1981-03-11 |
| BR8005683A (pt) | 1981-03-24 |
| DE3033225C2 (de) | 1984-07-12 |
| SE8006254L (sv) | 1981-03-11 |
| NO156157B (no) | 1987-04-27 |
| IL61019A0 (en) | 1980-11-30 |
| IT1172255B (it) | 1987-06-18 |
| GB2062685A (en) | 1981-05-28 |
| MX154018A (es) | 1987-03-25 |
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