FR2403979A1 - Procede pour produire des billes de matiere minerale cont enant du carbure de tungstene - Google Patents
Procede pour produire des billes de matiere minerale cont enant du carbure de tungsteneInfo
- Publication number
- FR2403979A1 FR2403979A1 FR7827424A FR7827424A FR2403979A1 FR 2403979 A1 FR2403979 A1 FR 2403979A1 FR 7827424 A FR7827424 A FR 7827424A FR 7827424 A FR7827424 A FR 7827424A FR 2403979 A1 FR2403979 A1 FR 2403979A1
- Authority
- FR
- France
- Prior art keywords
- droplets
- carbide
- material containing
- mineral material
- particles
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
- B01J2/06—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops in a liquid medium
- B01J2/08—Gelation of a colloidal solution
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K1/00—Nibs; Writing-points
- B43K1/08—Nibs; Writing-points with ball points; Balls or ball beds
- B43K1/082—Balls
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
- C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Carbon And Carbon Compounds (AREA)
- Catalysts (AREA)
- Powder Metallurgy (AREA)
Abstract
L'invention décrit la production de billes de carbure de tungstène contenant Co. On forme des gouttelettes d'un mélange liquide comprenant des particules de carbure de tungstène, de la gomme guar, un sel de Co dissous et un agent non ionique de mouillage; on met les particules au contact (en moins d'une heure) d'une base pour précipiter le Co (gouttelettes de gel précipitées). On place ces gouttelettes dans un récipient à faible conductibilité thermique et l'on chauffe en atmosphère réductrice pour enlever la gomme guar et fritter le carbure et Co. Un usinage de finition de cette ébauche donne des billes pour stylos à bille.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4004977 | 1977-09-26 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2403979A1 true FR2403979A1 (fr) | 1979-04-20 |
FR2403979B1 FR2403979B1 (fr) | 1984-03-16 |
Family
ID=10412921
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7827424A Granted FR2403979A1 (fr) | 1977-09-26 | 1978-09-25 | Procede pour produire des billes de matiere minerale cont enant du carbure de tungstene |
Country Status (4)
Country | Link |
---|---|
US (1) | US4182627A (fr) |
DE (1) | DE2841853A1 (fr) |
FR (1) | FR2403979A1 (fr) |
GB (1) | GB2034678B (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0142239A1 (fr) * | 1983-10-14 | 1985-05-22 | Corning Glass Works | Bille en céramique pour stylo, destinée à transférer un liquide |
US10919086B2 (en) | 2015-12-01 | 2021-02-16 | HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung | Method for producing refractory composite particles and feeder elements for the foundry industry, corresponding feeder elements and uses |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2116959B (en) * | 1982-03-19 | 1985-09-04 | Atomic Energy Authority Uk | Materials suitable for use as thermal spraying powders |
US4548832A (en) * | 1982-03-19 | 1985-10-22 | United Kingdom Atomic Energy Authority | Materials |
JPS6475030A (en) * | 1987-09-14 | 1989-03-20 | Asahi Optical Co Ltd | Production of spherical ceramic particles |
US5651808A (en) * | 1989-11-09 | 1997-07-29 | Rutgers, The State University Of New Jersey | Carbothermic reaction process for making nanophase WC-Co powders |
US5841045A (en) * | 1995-08-23 | 1998-11-24 | Nanodyne Incorporated | Cemented carbide articles and master alloy composition |
SE9704847L (sv) * | 1997-12-22 | 1999-06-21 | Sandvik Ab | Sätt att framställa ett metallkompositmaterial innehållande hårda partiklar och bindemetall |
US6332728B1 (en) * | 1998-12-03 | 2001-12-25 | Sakura Color Products Corporation | Ball for ball-point pen |
US6423111B1 (en) * | 2000-07-19 | 2002-07-23 | Tsubaki Nakashima Co., Ltd. | Ball for ball-point pen |
JP5641698B2 (ja) * | 2008-03-17 | 2014-12-17 | パイロットインキ株式会社 | 水性ボールペン |
US10369724B2 (en) * | 2015-11-19 | 2019-08-06 | Schlumberger Technology Corporation | Method of making spheroidal particles |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1519066A (fr) * | 1966-04-07 | 1968-03-29 | Atomic Energy Authority Uk | Procédé de production de particules contenant du métal |
FR2143394A1 (fr) * | 1971-06-24 | 1973-02-02 | Atomic Energy Authority Uk | |
FR2346303A1 (fr) * | 1976-03-31 | 1977-10-28 | Atomic Energy Authority Uk | Procede de preparation de matieres refractaires utiles sous forme de combustible nucleaire |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1148794A (en) * | 1967-05-19 | 1969-04-16 | Canadian Patents Dev | Forming balls from powder |
US3617358A (en) * | 1967-09-29 | 1971-11-02 | Metco Inc | Flame spray powder and process |
US3746456A (en) * | 1969-08-18 | 1973-07-17 | Parker Pen Co | Ball point pen writing ball composed of a cemented carbide composition |
US3628921A (en) * | 1969-08-18 | 1971-12-21 | Parker Pen Co | Corrosion resistant binder for tungsten carbide materials and titanium carbide materials |
GB1313750A (en) * | 1969-10-10 | 1973-04-18 | Atomic Energy Authority Uk | Manufacture of microspheres by gel precipitation methods |
US3851096A (en) * | 1972-11-03 | 1974-11-26 | Texas Instruments Inc | Surveillance system |
GB1420128A (en) * | 1973-09-04 | 1976-01-07 | Atomic Energy Authority Uk | Processes for the preparation of metal-containing compounds |
US4025334A (en) * | 1976-04-08 | 1977-05-24 | Gte Sylvania Incorporated | Tungsten carbide-cobalt flame spray powder and method |
-
1978
- 1978-09-18 GB GB7837170A patent/GB2034678B/en not_active Expired
- 1978-09-21 US US05/944,654 patent/US4182627A/en not_active Expired - Lifetime
- 1978-09-25 FR FR7827424A patent/FR2403979A1/fr active Granted
- 1978-09-26 DE DE19782841853 patent/DE2841853A1/de not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1519066A (fr) * | 1966-04-07 | 1968-03-29 | Atomic Energy Authority Uk | Procédé de production de particules contenant du métal |
FR2143394A1 (fr) * | 1971-06-24 | 1973-02-02 | Atomic Energy Authority Uk | |
FR2346303A1 (fr) * | 1976-03-31 | 1977-10-28 | Atomic Energy Authority Uk | Procede de preparation de matieres refractaires utiles sous forme de combustible nucleaire |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0142239A1 (fr) * | 1983-10-14 | 1985-05-22 | Corning Glass Works | Bille en céramique pour stylo, destinée à transférer un liquide |
US10919086B2 (en) | 2015-12-01 | 2021-02-16 | HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung | Method for producing refractory composite particles and feeder elements for the foundry industry, corresponding feeder elements and uses |
Also Published As
Publication number | Publication date |
---|---|
US4182627A (en) | 1980-01-08 |
DE2841853A1 (de) | 1979-04-12 |
FR2403979B1 (fr) | 1984-03-16 |
GB2034678A (en) | 1980-06-11 |
GB2034678B (en) | 1982-07-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |