JPS57143401A - Treatment of metallic powder - Google Patents
Treatment of metallic powderInfo
- Publication number
- JPS57143401A JPS57143401A JP56028934A JP2893481A JPS57143401A JP S57143401 A JPS57143401 A JP S57143401A JP 56028934 A JP56028934 A JP 56028934A JP 2893481 A JP2893481 A JP 2893481A JP S57143401 A JPS57143401 A JP S57143401A
- Authority
- JP
- Japan
- Prior art keywords
- carbon content
- metallic powder
- obtd
- partial pressure
- powder
- 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.)
- Pending
Links
- 239000000843 powder Substances 0.000 title abstract 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 3
- 229910052799 carbon Inorganic materials 0.000 abstract 3
- 238000000034 method Methods 0.000 abstract 3
- 238000005261 decarburization Methods 0.000 abstract 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 1
- 239000007795 chemical reaction product Substances 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 229910052750 molybdenum Inorganic materials 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 229910052698 phosphorus Inorganic materials 0.000 abstract 1
- 229910052721 tungsten Inorganic materials 0.000 abstract 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/14—Treatment of metallic powder
- B22F1/145—Chemical treatment, e.g. passivation or decarburisation
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/0824—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid
-
- 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
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Powder Metallurgy (AREA)
Abstract
PURPOSE:To reduce the carbon content of carbon-contg. metallic powder made essentially of difficultly oxidizable element and obtd. by an oil atomizing method to the amount required in an end product by treating the powder in an atmosphere consisting of H2O and H2 under specified conditions to accelerate the decarburization reaction. CONSTITUTION:Metallic powder made essentially of difficultly oxidizable element such as Mo, Ni, Cu, Co, Fe, P or W, having 0.1wt% carbon content, and obtd. by an oil atomizing method is decarburized in an atmosphere consisting of H2O and H2 at 500-1,000 deg.C atmospheric temp. (t) under conditions satisfying the equation (where PH2O is the partial pressure of steam, and PH2 is the partial pressure of hydrogen). By this method the decarburization reaction can be accelerated while preventing an ill effect due to the sticking of the particles of the powder to each other, and the carbon content can be reduced to <=0.1% in a short time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56028934A JPS57143401A (en) | 1981-02-28 | 1981-02-28 | Treatment of metallic powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56028934A JPS57143401A (en) | 1981-02-28 | 1981-02-28 | Treatment of metallic powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57143401A true JPS57143401A (en) | 1982-09-04 |
Family
ID=12262222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56028934A Pending JPS57143401A (en) | 1981-02-28 | 1981-02-28 | Treatment of metallic powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57143401A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57185901A (en) * | 1981-05-06 | 1982-11-16 | Sumitomo Metal Ind Ltd | Treatment for steel powder |
| CN103143725A (en) * | 2013-03-29 | 2013-06-12 | 赣州远驰新材料有限公司 | Method for preparing rare earth modified tungsten-base alloy powder |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5120705A (en) * | 1974-08-14 | 1976-02-19 | Nippon Steel Corp | Kofunno datsutanshodonkangenho |
-
1981
- 1981-02-28 JP JP56028934A patent/JPS57143401A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5120705A (en) * | 1974-08-14 | 1976-02-19 | Nippon Steel Corp | Kofunno datsutanshodonkangenho |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57185901A (en) * | 1981-05-06 | 1982-11-16 | Sumitomo Metal Ind Ltd | Treatment for steel powder |
| JPS6366361B2 (en) * | 1981-05-06 | 1988-12-20 | Sumitomo Metal Ind | |
| CN103143725A (en) * | 2013-03-29 | 2013-06-12 | 赣州远驰新材料有限公司 | Method for preparing rare earth modified tungsten-base alloy powder |
| CN103143725B (en) * | 2013-03-29 | 2015-08-12 | 赣州远驰新材料有限公司 | The preparation method of rare earth modified tungsten-base alloy powder |
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