JPS5449906A - Steel powder for powder metallurgy - Google Patents
Steel powder for powder metallurgyInfo
- Publication number
- JPS5449906A JPS5449906A JP11651677A JP11651677A JPS5449906A JP S5449906 A JPS5449906 A JP S5449906A JP 11651677 A JP11651677 A JP 11651677A JP 11651677 A JP11651677 A JP 11651677A JP S5449906 A JPS5449906 A JP S5449906A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- steel powder
- steel
- atomized
- annealed
- 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
- 229910000831 Steel Inorganic materials 0.000 title abstract 12
- 239000000843 powder Substances 0.000 title abstract 12
- 239000010959 steel Substances 0.000 title abstract 12
- 238000004663 powder metallurgy Methods 0.000 title abstract 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 2
- 230000002411 adverse Effects 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 229910021529 ammonia Inorganic materials 0.000 abstract 1
- 238000000137 annealing Methods 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 238000013329 compounding Methods 0.000 abstract 1
- 238000000354 decomposition reaction Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 239000011261 inert gas Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 abstract 1
- 238000011282 treatment Methods 0.000 abstract 1
Landscapes
- Powder Metallurgy (AREA)
Abstract
PURPOSE: The steel powde for powder metallurgy having excellent characteristics, which is obtained by compounding the atomized steel powder as it is or the atomized steel powder annealed at a low temperature in a definite ratio to the powder of atomized steel to which the reducting and softening treatments have been applied.
CONSTITUTION: Because the atomized steel powder is too hard in the hardened state and has the oxide coating on its surface, this steel powder is reduced and annealed by being heated to 900W1000°C in hydrogen gas or the ammonia decomposition gas. As this reduced and annealed steel powder has an excellent compressibility, the pressure for molding must be reduced at the preparation of the sintered product of low density. As the result, the moldability is deteriorated, so that the atomized steel powder as it is or the steel powder obtained by annealing the above atomized powder at a low temperature of 600W800°C in an inert gas or in hydrogen gas, is mixed in a ratio of 10W40 wt.%. The mixed steel powder is excellent in both characteristics of compressibility and moldability and receives only a small adverse effect from the surface oxide, so that this steel powder is excellent as the material for sintered alloy
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11651677A JPS5449906A (en) | 1977-09-27 | 1977-09-27 | Steel powder for powder metallurgy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11651677A JPS5449906A (en) | 1977-09-27 | 1977-09-27 | Steel powder for powder metallurgy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5449906A true JPS5449906A (en) | 1979-04-19 |
Family
ID=14689071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11651677A Pending JPS5449906A (en) | 1977-09-27 | 1977-09-27 | Steel powder for powder metallurgy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5449906A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54102210A (en) * | 1978-01-31 | 1979-08-11 | Kobe Steel Ltd | Steel powder for use in powder metallurgy |
| US4519852A (en) * | 1982-01-21 | 1985-05-28 | Davy Mckee (Sheffield) Limited | Annealing of high speed steel powder |
-
1977
- 1977-09-27 JP JP11651677A patent/JPS5449906A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54102210A (en) * | 1978-01-31 | 1979-08-11 | Kobe Steel Ltd | Steel powder for use in powder metallurgy |
| JPS5645963B2 (en) * | 1978-01-31 | 1981-10-30 | ||
| US4519852A (en) * | 1982-01-21 | 1985-05-28 | Davy Mckee (Sheffield) Limited | Annealing of high speed steel powder |
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