JPS55152107A - Manufacture of sintered iron mechanical part - Google Patents
Manufacture of sintered iron mechanical partInfo
- Publication number
- JPS55152107A JPS55152107A JP6083479A JP6083479A JPS55152107A JP S55152107 A JPS55152107 A JP S55152107A JP 6083479 A JP6083479 A JP 6083479A JP 6083479 A JP6083479 A JP 6083479A JP S55152107 A JPS55152107 A JP S55152107A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- sintered
- parts
- predetermined size
- sintered iron
- 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.)
- Granted
Links
Landscapes
- Powder Metallurgy (AREA)
Abstract
PURPOSE: To improve the size accuracy of a sintered iron machine parts by sub- zero treating the machine part in a mold having predetermined dimensions to restrict the expansion due to the martensite transformation in the mold to correct it to predetermined size.
CONSTITUTION: After powder metal mixture containing 0.3W1.0% of C, 2W6% of Ni, and 0.2W2% of at least one of Mn, Mo, Cu, Cr and V is molded in a mold, the molded parts are sintered at 1,130°C for 30 minutes in endothermic converted gas. The sintered part is carburized and quenched to form residual austenite by 30W 80% in the surface layer. Then, the parts are supplied to a mold having predetermined size and dipped in advance in a liquid nitrogen to sub-zero treat the sintered article. At this time the expansion of the part due to martensite transformation is restricted in the mold to correct it to predetermined size. Therefore, the size accuracy of the part can be easily enhanced to precisely form the sintered iron machine part which has been considered to be difficult heretofore.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6083479A JPS6057482B2 (en) | 1979-05-17 | 1979-05-17 | Manufacturing method for iron-based sintered machine parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6083479A JPS6057482B2 (en) | 1979-05-17 | 1979-05-17 | Manufacturing method for iron-based sintered machine parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55152107A true JPS55152107A (en) | 1980-11-27 |
| JPS6057482B2 JPS6057482B2 (en) | 1985-12-16 |
Family
ID=13153777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6083479A Expired JPS6057482B2 (en) | 1979-05-17 | 1979-05-17 | Manufacturing method for iron-based sintered machine parts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6057482B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0722796A1 (en) * | 1995-01-17 | 1996-07-24 | Sumitomo Electric Industries, Ltd. | Process for producing heat-treated sintered iron alloy part |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107419186A (en) * | 2017-04-28 | 2017-12-01 | 张家港振江粉末冶金制品有限公司 | A kind of manufacture method of helical gear |
-
1979
- 1979-05-17 JP JP6083479A patent/JPS6057482B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0722796A1 (en) * | 1995-01-17 | 1996-07-24 | Sumitomo Electric Industries, Ltd. | Process for producing heat-treated sintered iron alloy part |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6057482B2 (en) | 1985-12-16 |
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