JPS5651504A - Production of sintered hydraulic parts - Google Patents

Production of sintered hydraulic parts

Info

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
Application number
JP12544079A
Other languages
Japanese (ja)
Other versions
JPS6220243B2 (en
Inventor
Mamoru Ashitagawa
Masatoshi Hasebe
Shuji Matsumoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP12544079A priority Critical patent/JPS5651504A/en
Publication of JPS5651504A publication Critical patent/JPS5651504A/en
Publication of JPS6220243B2 publication Critical patent/JPS6220243B2/ja
Granted legal-status Critical Current

Links

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
JP12544079A 1979-09-29 1979-09-29 Production of sintered hydraulic parts Granted JPS5651504A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (6)

* Cited by examiner, † Cited by third party
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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