GB907788A - Improvements in or relating to the manufacture of solid bodies by heating compacted powdered refractory substances - Google Patents
Improvements in or relating to the manufacture of solid bodies by heating compacted powdered refractory substancesInfo
- Publication number
- GB907788A GB907788A GB2468559A GB2468559A GB907788A GB 907788 A GB907788 A GB 907788A GB 2468559 A GB2468559 A GB 2468559A GB 2468559 A GB2468559 A GB 2468559A GB 907788 A GB907788 A GB 907788A
- Authority
- GB
- United Kingdom
- Prior art keywords
- powder
- sintering
- compact
- glass
- materials
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
Sintered bodies of metallic or refractory materials are formed by compacting the powder materials and sintering the compact by immersing it in molten glass which has a lower melting-point than some of the constituents of the powder. The process is exemplified by the sintering of Fe powder which is compacted and then immersed in a molten bath of glass at 1200 DEG C./1250 DEG C. until sintering is complete. The compacts may be presintered prior to sintering and the degree of penetration of the glass is regulated by controlling the powder grain size, the pressure of compaction and the oxidation of the powder particles. Thus by oxidizing the ferrous powder compact at 500 DEG C.-600 DEG C. in steam the compact is completely impregnated with the glass after sintering. After sintering the compact may be cooled in a protective atmosphere such as argon or quenched in oil or water. The sintering may also be effected by enclosing the compact in a sheath of metal or glass and if contact with the molten bath is to be avoided the sheath should have a melting temperature higher than the sintering temperature of the powder. Other examples of materials which are sintered in this way are "Alcomax" (Registered Trade Mark), stainless steel, and low alloy Ni steels. In addition C and Al2O3 may be added as powder to the Fe powder to give the required properties.ALSO:Sintered bodies of metallic or refractory materials are formed by compacting the powder materials and sintering the compact by immersing it in molten glass which has a lower melting point than some of the constituents of the powder. The process is exemplified by the sintering of Fe powder which may be mixed with graphite or alumina, which is compacted and then immersed in a molten bath of glass at 1200 DEG C/1250 DEG C until sintering is complete. The compacts may be presintered prior to sintering and the degree of penetration of the glass is regulated by controlling the powder grain size, the pressure of compaction and the oxidation of the powder particles. Thus by oxidising the ferrous powder compact at 500 DEG C-600 DEG C in steam the compact is completely impregnated with the glass after sintering. After sintering the compact may be cooled in a protective atmosphere such as argon or quenched in oil or water. The sintering may also be effected by enclosing the compact in a sheath of metal or glass and if contact with the molten bath is to be avoided the sheath should have a melting temperature higher than the sintering temperature of the powder. Other examples of materials which are sintered in this way are "Alcomax" (Registered Trade Mark) stainless steel and low alloy Ni steels. In addition C and Al2O3 may be added as powder to the Fe powder to give the required properties.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2468559A GB907788A (en) | 1959-07-17 | 1959-07-17 | Improvements in or relating to the manufacture of solid bodies by heating compacted powdered refractory substances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2468559A GB907788A (en) | 1959-07-17 | 1959-07-17 | Improvements in or relating to the manufacture of solid bodies by heating compacted powdered refractory substances |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB907788A true GB907788A (en) | 1962-10-10 |
Family
ID=10215664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2468559A Expired GB907788A (en) | 1959-07-17 | 1959-07-17 | Improvements in or relating to the manufacture of solid bodies by heating compacted powdered refractory substances |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB907788A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5219105A (en) * | 1975-08-06 | 1977-02-14 | Topy Ind Ltd | Nonoxidative sintering and forging method |
| JPS5240409A (en) * | 1975-09-27 | 1977-03-29 | Yoshizaki Kozo | Process for sintering moldings of iron powder or iron-base alloy powde r |
-
1959
- 1959-07-17 GB GB2468559A patent/GB907788A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5219105A (en) * | 1975-08-06 | 1977-02-14 | Topy Ind Ltd | Nonoxidative sintering and forging method |
| JPS5240409A (en) * | 1975-09-27 | 1977-03-29 | Yoshizaki Kozo | Process for sintering moldings of iron powder or iron-base alloy powde r |
| JPS5642642B2 (en) * | 1975-09-27 | 1981-10-06 |
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