GB274283A - Improvement process for the sintering of refractory metals - Google Patents
Improvement process for the sintering of refractory metalsInfo
- Publication number
- GB274283A GB274283A GB1866926A GB1866926A GB274283A GB 274283 A GB274283 A GB 274283A GB 1866926 A GB1866926 A GB 1866926A GB 1866926 A GB1866926 A GB 1866926A GB 274283 A GB274283 A GB 274283A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sintering
- metal
- heating
- high vacuum
- maintained high
- 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
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
- B22F3/10—Sintering only
- B22F3/1017—Multiple heating or additional steps
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
274,283. Davis, N. R., and Metropolitan-Vickers Electrical Co., Ltd. July 26, 1926. Metals, powdered, obtaining coherent masses from.-A process for sintering refractory metals which are chemically active when hot consists in slowly heating a pressed powder body of the metal in a maintained high vacuum so as to drive off and remove the occluded gases at a temperature below that at which they will chemically combine with the metal, then allowing the body to cool under the maintained high vacuum, and finally heating the body quickly to the sintering temperature either in a vacuum or in gas or in air at a low or at atmospheric pressure. In the case of zirconium, the occluded gases may be removed at 350‹ C. and the metal may then be heated to 800‹ or 1000‹ to effect a preliminary sintering before the intermediate cooling stage, and the final sintering is effected near the melting point by electric induction heating or by passing a current through the body. The initial heating may be effected in a resistance furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1866926A GB274283A (en) | 1926-07-26 | 1926-07-26 | Improvement process for the sintering of refractory metals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1866926A GB274283A (en) | 1926-07-26 | 1926-07-26 | Improvement process for the sintering of refractory metals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB274283A true GB274283A (en) | 1927-07-21 |
Family
ID=10116405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1866926A Expired GB274283A (en) | 1926-07-26 | 1926-07-26 | Improvement process for the sintering of refractory metals |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB274283A (en) |
-
1926
- 1926-07-26 GB GB1866926A patent/GB274283A/en not_active Expired
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