JPS5726108A - Production of stainless steel powder - Google Patents

Production of stainless steel powder

Info

Publication number
JPS5726108A
JPS5726108A JP10160780A JP10160780A JPS5726108A JP S5726108 A JPS5726108 A JP S5726108A JP 10160780 A JP10160780 A JP 10160780A JP 10160780 A JP10160780 A JP 10160780A JP S5726108 A JPS5726108 A JP S5726108A
Authority
JP
Japan
Prior art keywords
stainless steel
powder
soln
treated
etching
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
Application number
JP10160780A
Other languages
Japanese (ja)
Inventor
Keitaro Minami
Tsunehisa Somura
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.)
TAKASAGO IRON WORKS
Takasago Tekko KK
Original Assignee
TAKASAGO IRON WORKS
Takasago Tekko KK
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 TAKASAGO IRON WORKS, Takasago Tekko KK filed Critical TAKASAGO IRON WORKS
Priority to JP10160780A priority Critical patent/JPS5726108A/en
Publication of JPS5726108A publication Critical patent/JPS5726108A/en
Pending legal-status Critical Current

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  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)

Abstract

PURPOSE: To produce stainless steel powder of good formability with high yields by subjecting the austenitic stainless steel having been solid solution-treated to sensitization treatment under specific conditions and etching the same with a mixed acid soln of nitricacid and hydrofluoricacid of proper concns.
CONSTITUTION: The austenitic atainless steel having been solid solution-treated is heated for 10W20hr at 630W700°C in an oxidation-free or reducing atmosprere, after which it is slowly cooled down to ordinary temp. The stainless steel having undergone such sensitization treatment is immersed in an etching soln. of 20±5% nitric acid concn. in the soln. and 3±0.5% hydrofluoric acid concn., whereby intergranular corrosion is caused and the stainless steel in made into powder. The stainless powder obtained by this method has a gain size distribution of about ≥90% 250-mesh undersize, and since no mechanical size reducing means are used after the intergranular corrosion, the hardness of the powder is low. The high powder density at the compression molding makes the formation of cracking or the like in the molding virtually none.
COPYRIGHT: (C)1982,JPO&Japio
JP10160780A 1980-07-24 1980-07-24 Production of stainless steel powder Pending JPS5726108A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10160780A JPS5726108A (en) 1980-07-24 1980-07-24 Production of stainless steel powder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10160780A JPS5726108A (en) 1980-07-24 1980-07-24 Production of stainless steel powder

Publications (1)

Publication Number Publication Date
JPS5726108A true JPS5726108A (en) 1982-02-12

Family

ID=14305073

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10160780A Pending JPS5726108A (en) 1980-07-24 1980-07-24 Production of stainless steel powder

Country Status (1)

Country Link
JP (1) JPS5726108A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104162678A (en) * 2014-09-03 2014-11-26 四川理工学院 Method for preparing high-compressibility water atomization stainless steel powder through intergranular corrosion

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104162678A (en) * 2014-09-03 2014-11-26 四川理工学院 Method for preparing high-compressibility water atomization stainless steel powder through intergranular corrosion

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