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 alloyInfo
- 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
Links
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title abstract 12
- 229910052757 nitrogen Inorganic materials 0.000 title abstract 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title abstract 6
- 229910052804 chromium Inorganic materials 0.000 title abstract 6
- 239000011651 chromium Substances 0.000 title abstract 6
- 229910052751 metal Inorganic materials 0.000 title abstract 4
- 239000002184 metal Substances 0.000 title abstract 4
- 229910045601 alloy Inorganic materials 0.000 title abstract 2
- 239000000956 alloy Substances 0.000 title abstract 2
- 238000004519 manufacturing process Methods 0.000 title 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 abstract 4
- 230000004907 flux Effects 0.000 abstract 4
- 150000001342 alkaline earth metals Chemical class 0.000 abstract 3
- 239000007789 gas Substances 0.000 abstract 3
- 150000004820 halides Chemical class 0.000 abstract 3
- 229910000604 Ferrochrome Inorganic materials 0.000 abstract 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 abstract 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract 2
- 229910052783 alkali metal Inorganic materials 0.000 abstract 2
- 150000001340 alkali metals Chemical class 0.000 abstract 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 abstract 1
- 239000003513 alkali Substances 0.000 abstract 1
- 229910052791 calcium Inorganic materials 0.000 abstract 1
- 239000001110 calcium chloride Substances 0.000 abstract 1
- 229910001628 calcium chloride Inorganic materials 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000011065 in-situ storage Methods 0.000 abstract 1
- 229910052749 magnesium Inorganic materials 0.000 abstract 1
- 229910001629 magnesium chloride Inorganic materials 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 239000000843 powder Substances 0.000 abstract 1
- 239000011780 sodium chloride Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003011684A (en) * | 2001-06-27 | 2003-01-15 | Kanzaki Kokyukoki Mfg Co Ltd | Transmission for tractor |
-
1980
- 1980-12-29 JP JP55187717A patent/JPS6051543B2/en not_active Expired
Cited By (1)
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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