JPS6473005A - Carburizing treating method for sintered material - Google Patents
Carburizing treating method for sintered materialInfo
- Publication number
- JPS6473005A JPS6473005A JP22755487A JP22755487A JPS6473005A JP S6473005 A JPS6473005 A JP S6473005A JP 22755487 A JP22755487 A JP 22755487A JP 22755487 A JP22755487 A JP 22755487A JP S6473005 A JPS6473005 A JP S6473005A
- Authority
- JP
- Japan
- Prior art keywords
- sintered body
- sintered
- concn
- less
- quenched
- 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
Landscapes
- Powder Metallurgy (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
PURPOSE:To give a sintered body the hardness and bending strength as the same level as a melting material by heating the sintered body specifying sintered density under reduced pressure atmosphere diluting hydrocarbon gas with inert gas to raise C concn. on the surface and quenching. CONSTITUTION:The sintered body obtd. by sintering alloy steel powder for sintered machine parts and having 93.0-97.0% relative sintered density is heated under reduced pressure atmosphere diluting the hydrocarbon gas with the inert gas. After raising the C concn. on the surface of the sintered body to less than Acm line, it is quenched. Or, after raising the C concn. on the surface of the sintered body to more than Acm line and successively heating under nonoxidizing atmosphere having carbon potential less than the C concn. on the most outer surface of the sintered body, it is quenched. In this method, in case the relative sintered density is less than the lower limit, the high hard ness can not be obtained as the whole, and in case it exceeds the upper limit, sufficient surface hardness can not be obtained because rapid carburization is difficult. Further, by the above carburization before quenching, line carbide can be precipitated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22755487A JPS6473005A (en) | 1987-09-12 | 1987-09-12 | Carburizing treating method for sintered material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22755487A JPS6473005A (en) | 1987-09-12 | 1987-09-12 | Carburizing treating method for sintered material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6473005A true JPS6473005A (en) | 1989-03-17 |
Family
ID=16862723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22755487A Pending JPS6473005A (en) | 1987-09-12 | 1987-09-12 | Carburizing treating method for sintered material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6473005A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014103999A1 (en) * | 2012-12-28 | 2014-07-03 | 株式会社神戸製鋼所 | Pre-alloyed steel powder for highly fatigue-resistant sintered body and carburized and quenched material |
-
1987
- 1987-09-12 JP JP22755487A patent/JPS6473005A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014103999A1 (en) * | 2012-12-28 | 2014-07-03 | 株式会社神戸製鋼所 | Pre-alloyed steel powder for highly fatigue-resistant sintered body and carburized and quenched material |
| JP2014141743A (en) * | 2012-12-28 | 2014-08-07 | Kobe Steel Ltd | Pre-alloy type steel powder for high fatigue strength sintered compact sintered compact, and carburized quenching material |
| CN104884659A (en) * | 2012-12-28 | 2015-09-02 | 株式会社神户制钢所 | Pre-alloyed steel powder for highly fatigue-resistant sintered body and carburized and quenched material |
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