GB625397A - Improvements in or relating to powdered metal compositions - Google Patents
Improvements in or relating to powdered metal compositionsInfo
- Publication number
- GB625397A GB625397A GB2053147A GB2053147A GB625397A GB 625397 A GB625397 A GB 625397A GB 2053147 A GB2053147 A GB 2053147A GB 2053147 A GB2053147 A GB 2053147A GB 625397 A GB625397 A GB 625397A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- sintering
- mixture
- compacting
- articles
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
- C22C33/0285—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5% with Cr, Co, or Ni having a minimum content higher than 5%
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
Abstract
A modification of the composition of the powder mixture of the parent Specification, the modified mixture having the following composition: Ni above 8 per cent and up to 25 per cent, Mn 0.2 to 1.4 per cent, graphite 0.08 to 1.0 per cent, soft iron and the usual impurities forming the remainder. The Mn content may be added in the form of manganese carbonate. The particles of the constituents, other than iron, should preferably pass through a 300 mesh sieve. In a further modification of the invention of the parent case, articles are manufactured from powder mixtures containing 2-25 per cent Ni by first compacting and then sintering the mixture, for example compacting at a pressure upwards of 20 tons per square inch and sintering at temperatures above 1100 DEG C. Sintering is preferably carried out in a non-oxidizing atmosphere comprising 75 per cent hydrogen and 25 per cent nitrogen. The compacted and sintered mixture may be coined at pressures up to 60 tons per square inch with or without subsequent sintering at up to 1350 DEG C. or heat treatment as normally applied to wrought steel. The powder mixtures of the present invention containing above 8 per cent of Ni may, alternatively, be formed into articles by a simultaneous compacting and sintering operation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2053147A GB625397A (en) | 1947-07-30 | 1947-07-30 | Improvements in or relating to powdered metal compositions |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2053147A GB625397A (en) | 1947-07-30 | 1947-07-30 | Improvements in or relating to powdered metal compositions |
Publications (1)
Publication Number | Publication Date |
---|---|
GB625397A true GB625397A (en) | 1949-06-27 |
Family
ID=10147404
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2053147A Expired GB625397A (en) | 1947-07-30 | 1947-07-30 | Improvements in or relating to powdered metal compositions |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB625397A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2741827A (en) * | 1950-12-22 | 1956-04-17 | August H Schilling | Process for the manufacture of piston rings by powder metallurgy and articles obtained thereby |
US2872311A (en) * | 1955-11-14 | 1959-02-03 | Birmingham Small Arms Co Ltd | Poweder metal compacts |
-
1947
- 1947-07-30 GB GB2053147A patent/GB625397A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2741827A (en) * | 1950-12-22 | 1956-04-17 | August H Schilling | Process for the manufacture of piston rings by powder metallurgy and articles obtained thereby |
US2872311A (en) * | 1955-11-14 | 1959-02-03 | Birmingham Small Arms Co Ltd | Poweder metal compacts |
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