JPS5641066A - Electroslag hot top method - Google Patents

Electroslag hot top method

Info

Publication number
JPS5641066A
JPS5641066A JP11779079A JP11779079A JPS5641066A JP S5641066 A JPS5641066 A JP S5641066A JP 11779079 A JP11779079 A JP 11779079A JP 11779079 A JP11779079 A JP 11779079A JP S5641066 A JPS5641066 A JP S5641066A
Authority
JP
Japan
Prior art keywords
cao
sio
molten
work
composition
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
JP11779079A
Other languages
Japanese (ja)
Other versions
JPS5931426B2 (en
Inventor
Yutaka Hirose
Shigeyuki Matsufuji
Hitoshi Yoshii
Kouji Morinaka
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 CHIYUUTANKOU KK
Nippon Steel Corp
Original Assignee
NIPPON CHIYUUTANKOU KK
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 CHIYUUTANKOU KK, Nippon Steel Corp filed Critical NIPPON CHIYUUTANKOU KK
Priority to JP54117790A priority Critical patent/JPS5931426B2/en
Publication of JPS5641066A publication Critical patent/JPS5641066A/en
Publication of JPS5931426B2 publication Critical patent/JPS5931426B2/en
Expired legal-status Critical Current

Links

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  • Manufacture And Refinement Of Metals (AREA)

Abstract

PURPOSE: To considerably improve the internal characteristic of a steel ingot without requiring any special work and equipment by transferring the molten slag in a pan after ending of ingotting work onto the molten stel by suitable means and holding the composition thereof to the specific component composition such as CaO, SiO2, CaF2.
CONSTITUTION: In an electroslag holt top method (EST method), the molten slag remaining in a pan after ending of ingotting work is transferred onto the molten metal in the head flask by using suitable means, after which the slag composition is maintained at 1.5W5 in Cao/SiO2 ratio, 1W3 in (CaO+MgO)/(SiO2+Al2O3), CaF2<20% and (T, Fe+T.Mn)<2% without addition of any slagging agent or by adding a suitable amount of a slagging agent. As a result, the expected desulfurization efficiency and the improvement in the cleanliness of inclusions may be realized; at the same time, the increas in the hydrogen contents in the steel ingot is prevented. This method is effective for the production of steam turbine rotors and the like.
COPYRIGHT: (C)1981,JPO&Japio
JP54117790A 1979-09-13 1979-09-13 Electroslag hot top method Expired JPS5931426B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54117790A JPS5931426B2 (en) 1979-09-13 1979-09-13 Electroslag hot top method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54117790A JPS5931426B2 (en) 1979-09-13 1979-09-13 Electroslag hot top method

Publications (2)

Publication Number Publication Date
JPS5641066A true JPS5641066A (en) 1981-04-17
JPS5931426B2 JPS5931426B2 (en) 1984-08-02

Family

ID=14720358

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54117790A Expired JPS5931426B2 (en) 1979-09-13 1979-09-13 Electroslag hot top method

Country Status (1)

Country Link
JP (1) JPS5931426B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4729421A (en) * 1983-10-28 1988-03-08 Werner Schatz Method and device for the production of metal blocks, castings or profile material with enclosed hard metal grains

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108315563B (en) * 2017-12-19 2020-02-14 重庆材料研究院有限公司 Electroslag remelting slag system of super duplex stainless steel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4729421A (en) * 1983-10-28 1988-03-08 Werner Schatz Method and device for the production of metal blocks, castings or profile material with enclosed hard metal grains

Also Published As

Publication number Publication date
JPS5931426B2 (en) 1984-08-02

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