JPS5651504A - Production of sintered hydraulic parts - Google Patents
Production of sintered hydraulic partsInfo
- Publication number
- JPS5651504A JPS5651504A JP12544079A JP12544079A JPS5651504A JP S5651504 A JPS5651504 A JP S5651504A JP 12544079 A JP12544079 A JP 12544079A JP 12544079 A JP12544079 A JP 12544079A JP S5651504 A JPS5651504 A JP S5651504A
- Authority
- JP
- Japan
- Prior art keywords
- sintered
- steam treatment
- hydraulic
- molding
- 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 inexpensively obtain sintered hydraulic parts having superior airtightness and wear resistance by press-molding iron and graphite powder then sintering the same thence subjecting the same to the primary steam treatment followed by oxide film removing working and further the secondary steam treatment.
CONSTITUTION: In producing hydraulic parts of sintered hydraulic valves 1 or the like by a powder metallurgical process, powder of iron and graphite is put in dies and is press-molded, thence the molding is sintered to form a sintered product which is then subjected to the primary steam treatment to perform pore sealing by the volume expansion at the oxidizing of the iron. Thence, the oxide film is removed by machining, after which the molding is further subjected to the secondary steam treatment. Thus, the sintered product having undergone the pore sealing treatment has better airtightnese and wear resistance of the entire part, and the sintered hydraulic parts 1 and the like used for valve plates etc. for hydraulic pump motors are obtained more economically than conventional machined parts.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12544079A JPS5651504A (en) | 1979-09-29 | 1979-09-29 | Production of sintered hydraulic parts |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12544079A JPS5651504A (en) | 1979-09-29 | 1979-09-29 | Production of sintered hydraulic parts |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5651504A true JPS5651504A (en) | 1981-05-09 |
JPS6220243B2 JPS6220243B2 (en) | 1987-05-06 |
Family
ID=14910133
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12544079A Granted JPS5651504A (en) | 1979-09-29 | 1979-09-29 | Production of sintered hydraulic parts |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5651504A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58193303A (en) * | 1982-05-07 | 1983-11-11 | Sumitomo Electric Ind Ltd | Preparation of soft ferrous sintered parts |
JPS60100601A (en) * | 1983-11-04 | 1985-06-04 | Sumitomo Electric Ind Ltd | Sintered iron parts |
WO2011007498A1 (en) * | 2009-07-15 | 2011-01-20 | 日立アプライアンス株式会社 | Reciprocating compressor |
-
1979
- 1979-09-29 JP JP12544079A patent/JPS5651504A/en active Granted
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58193303A (en) * | 1982-05-07 | 1983-11-11 | Sumitomo Electric Ind Ltd | Preparation of soft ferrous sintered parts |
JPS6221841B2 (en) * | 1982-05-07 | 1987-05-14 | Sumitomo Electric Industries | |
JPS60100601A (en) * | 1983-11-04 | 1985-06-04 | Sumitomo Electric Ind Ltd | Sintered iron parts |
JPH0559164B2 (en) * | 1983-11-04 | 1993-08-30 | Sumitomo Electric Industries | |
WO2011007498A1 (en) * | 2009-07-15 | 2011-01-20 | 日立アプライアンス株式会社 | Reciprocating compressor |
JP2011021530A (en) * | 2009-07-15 | 2011-02-03 | Hitachi Appliances Inc | Reciprocating compressor |
Also Published As
Publication number | Publication date |
---|---|
JPS6220243B2 (en) | 1987-05-06 |
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