JPS5623306A - Production of seamless steel pipe - Google Patents

Production of seamless steel pipe

Info

Publication number
JPS5623306A
JPS5623306A JP9879579A JP9879579A JPS5623306A JP S5623306 A JPS5623306 A JP S5623306A JP 9879579 A JP9879579 A JP 9879579A JP 9879579 A JP9879579 A JP 9879579A JP S5623306 A JPS5623306 A JP S5623306A
Authority
JP
Japan
Prior art keywords
steel ingot
unsolidified
rolling
filled
condition
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
JP9879579A
Other languages
Japanese (ja)
Inventor
Hajime Nashiwa
Kazuo Kobayashi
Koji Ieda
Yoshi Tomoya
Sadao Yakata
Hiroaki Shiraishi
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
Sumitomo Metal 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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP9879579A priority Critical patent/JPS5623306A/en
Publication of JPS5623306A publication Critical patent/JPS5623306A/en
Pending legal-status Critical Current

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  • Metal Rolling (AREA)

Abstract

PURPOSE: To improve metal flow and increase the yield and quality of products by blooming steel ingot under the condition that the unsolidified portion remains as it is.
CONSTITUTION: Killed steel ingot filled with water is made steel ingot filled with water by pouring water into the ingot immediately after the completion of cast and mold stripping is performed under the condition that the outer portion of the steel ingot is solidified and its center is unsolidified. After the molded steel ingot is applied to the soaking pit and the outer layer is soaked at the rolling temperature with 70W90% thickness solidification ratio, the steel ingot is bloomed under the condition that the unsolidified portion remains in the steel ingot and then rolling for making pipe is applied to the steel ingot. Since the unsolidified portion is moved to the rolling direction at blooming and the inner spaces of the top and end of rolled steel can be filled with the unsolidified material, the dicarded quantity of steel ingot at rolling can be decreased and, therefore, the yield is increased.
COPYRIGHT: (C)1981,JPO&Japio
JP9879579A 1979-08-01 1979-08-01 Production of seamless steel pipe Pending JPS5623306A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9879579A JPS5623306A (en) 1979-08-01 1979-08-01 Production of seamless steel pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9879579A JPS5623306A (en) 1979-08-01 1979-08-01 Production of seamless steel pipe

Publications (1)

Publication Number Publication Date
JPS5623306A true JPS5623306A (en) 1981-03-05

Family

ID=14229287

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9879579A Pending JPS5623306A (en) 1979-08-01 1979-08-01 Production of seamless steel pipe

Country Status (1)

Country Link
JP (1) JPS5623306A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4525917A (en) * 1983-03-24 1985-07-02 Armco Inc. Process for preparing rimming or semi-killed steel ingots for rolling into slabs
JPS60151366A (en) * 1984-01-19 1985-08-09 株式会社山東鉄工所 Continuous mercerization apparatus of fabric
JPS60151365A (en) * 1984-01-19 1985-08-09 株式会社山東鉄工所 Mercerization method and apparatus of fabric
JPS60155768A (en) * 1984-01-23 1985-08-15 株式会社山東鉄工所 Mercerization method and apparatus of fabric
JPS6477168A (en) * 1988-08-12 1989-03-23 Hitachi Ltd Formation of mos structure element for semiconductor substrate
CN104190740A (en) * 2014-07-15 2014-12-10 攀钢集团成都钢钒有限公司 Production method of hot-rolling seamless steel pipe billet

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4525917A (en) * 1983-03-24 1985-07-02 Armco Inc. Process for preparing rimming or semi-killed steel ingots for rolling into slabs
JPS60151366A (en) * 1984-01-19 1985-08-09 株式会社山東鉄工所 Continuous mercerization apparatus of fabric
JPS60151365A (en) * 1984-01-19 1985-08-09 株式会社山東鉄工所 Mercerization method and apparatus of fabric
JPS60155768A (en) * 1984-01-23 1985-08-15 株式会社山東鉄工所 Mercerization method and apparatus of fabric
JPS6477168A (en) * 1988-08-12 1989-03-23 Hitachi Ltd Formation of mos structure element for semiconductor substrate
CN104190740A (en) * 2014-07-15 2014-12-10 攀钢集团成都钢钒有限公司 Production method of hot-rolling seamless steel pipe billet

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