JPS5665914A - Production of low carbon stainless steel - Google Patents

Production of low carbon stainless steel

Info

Publication number
JPS5665914A
JPS5665914A JP14201279A JP14201279A JPS5665914A JP S5665914 A JPS5665914 A JP S5665914A JP 14201279 A JP14201279 A JP 14201279A JP 14201279 A JP14201279 A JP 14201279A JP S5665914 A JPS5665914 A JP S5665914A
Authority
JP
Japan
Prior art keywords
stainless steel
low carbon
porous plugs
production
decarburized
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
JP14201279A
Other languages
Japanese (ja)
Inventor
Teishiro Watanabe
Jun Kadoi
Hirofumi Furukawa
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries 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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP14201279A priority Critical patent/JPS5665914A/en
Publication of JPS5665914A publication Critical patent/JPS5665914A/en
Pending legal-status Critical Current

Links

Landscapes

  • Treatment Of Steel In Its Molten State (AREA)

Abstract

PURPOSE: To easily produce a low carbon stainless steel by taking the molten stainless steel having been decarburized down to a constant carbon amount in an arc furnace into a ladle provided with porous plugs, blowing mixed gases of O2 and Ar and charging a reducing agent.
CONSTITUTION: The molten stainless steel having been decarburized and refined down to 0.20W0.25% C in an arc furnace is put into a ladle 1 provided with a plurality of porous plugs 2 in the bottom. Mixed gases of O2 and Ar mixed at ratios of O2/Ar=0.15W1 are blown through the pipes 3 connected to these porous plugs 2 at rates of 0.25W1.0Nm3/ton.min, whereby the molten metal is refined down to about <0.01% C owing to the decrease in the partial pressure of the CO gas formed by the decarburization of the contained carbon by O2 and the decarburization by Ar, without oxidizing Cr so much. The Cr which has been oxidized and entered slag 6 as Cr2O3 is reduced to Cr by adding a reducing agent such as Ca-Si or Fe-Si from an adding device 6, thence the Cr is returned into the molten metal 7.
COPYRIGHT: (C)1981,JPO&Japio
JP14201279A 1979-11-05 1979-11-05 Production of low carbon stainless steel Pending JPS5665914A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14201279A JPS5665914A (en) 1979-11-05 1979-11-05 Production of low carbon stainless steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14201279A JPS5665914A (en) 1979-11-05 1979-11-05 Production of low carbon stainless steel

Publications (1)

Publication Number Publication Date
JPS5665914A true JPS5665914A (en) 1981-06-04

Family

ID=15305316

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14201279A Pending JPS5665914A (en) 1979-11-05 1979-11-05 Production of low carbon stainless steel

Country Status (1)

Country Link
JP (1) JPS5665914A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5021918A (en) * 1973-06-07 1975-03-08
JPS5128502A (en) * 1974-09-04 1976-03-10 Nisshin Steel Co Ltd
JPS5210816A (en) * 1975-07-16 1977-01-27 Showa Denko Kk Process for recovering low carbon ferro- chromium slag

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5021918A (en) * 1973-06-07 1975-03-08
JPS5128502A (en) * 1974-09-04 1976-03-10 Nisshin Steel Co Ltd
JPS5210816A (en) * 1975-07-16 1977-01-27 Showa Denko Kk Process for recovering low carbon ferro- chromium slag

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