JPS56105440A - Manufacture of extremely low nitrogen content of chromium-containing metal or alloy - Google Patents

Manufacture of extremely low nitrogen content of chromium-containing metal or alloy

Info

Publication number
JPS56105440A
JPS56105440A JP18771780A JP18771780A JPS56105440A JP S56105440 A JPS56105440 A JP S56105440A JP 18771780 A JP18771780 A JP 18771780A JP 18771780 A JP18771780 A JP 18771780A JP S56105440 A JPS56105440 A JP S56105440A
Authority
JP
Japan
Prior art keywords
chromium
extremely low
flux
metal
nitrogen
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
JP18771780A
Other languages
Japanese (ja)
Other versions
JPS6051543B2 (en
Inventor
Hiroyuki Katayama
Shigehiro Kimura
Takeshi Seike
Masamitsu Nishimura
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.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP55187717A priority Critical patent/JPS6051543B2/en
Publication of JPS56105440A publication Critical patent/JPS56105440A/en
Publication of JPS6051543B2 publication Critical patent/JPS6051543B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Manufacture And Refinement Of Metals (AREA)
  • Powder Metallurgy (AREA)

Abstract

PURPOSE: To extremely lower the nitrogen content of the chromium-containing metal or alloy to produce an extremely low-nitrogen product by heating metallic chromium, ferrochromium or the like to a specified temperature together with alkali metal and/or alkaline earth metal and halide thereof as a flux.
CONSTITUTION: A powder of metallic chromium, ferrochromium or the like with a particle size of 10W200 mesh, together with one or more alkali metals and/or alkaline earth metals and one or more halides thereof as the flux, is heated in an Ar gas atmosphere at 800W1,000°C for 30minW5hr and is then cooled in Ar gas or a gas having an extremely low nitrogen partial pressure to reduce the nitrogen content, thereby producing the extremely low-nitrogen product. In this case, not more than 2.0S tons of the chromium-containing material is placed in a reaction vessel having a horizontal cross-sectional area of not greater than 0.2m2 and is treated in situ. As the flux, the alkali or alkaline earth metal such as Ca, Mg, etc. is used in an amount of not less than 5 times of that of the nitrogen to be removed, while the halide such as CaCl2, MgCl2, NaCl, etc. is used in an amount of 3W30% of the metal to be treated. After the treatment, water is added to remove the used flux from the powdery chromium-containing metal.
COPYRIGHT: (C)1981,JPO&Japio
JP55187717A 1980-12-29 1980-12-29 Ultra-low nitrogenization method for chromium-containing metals or alloys Expired JPS6051543B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55187717A JPS6051543B2 (en) 1980-12-29 1980-12-29 Ultra-low nitrogenization method for chromium-containing metals or alloys

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55187717A JPS6051543B2 (en) 1980-12-29 1980-12-29 Ultra-low nitrogenization method for chromium-containing metals or alloys

Publications (2)

Publication Number Publication Date
JPS56105440A true JPS56105440A (en) 1981-08-21
JPS6051543B2 JPS6051543B2 (en) 1985-11-14

Family

ID=16210935

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55187717A Expired JPS6051543B2 (en) 1980-12-29 1980-12-29 Ultra-low nitrogenization method for chromium-containing metals or alloys

Country Status (1)

Country Link
JP (1) JPS6051543B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003011684A (en) * 2001-06-27 2003-01-15 Kanzaki Kokyukoki Mfg Co Ltd Transmission for tractor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003011684A (en) * 2001-06-27 2003-01-15 Kanzaki Kokyukoki Mfg Co Ltd Transmission for tractor

Also Published As

Publication number Publication date
JPS6051543B2 (en) 1985-11-14

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