JPS572838A - Production of steel material having uniform internal quality - Google Patents

Production of steel material having uniform internal quality

Info

Publication number
JPS572838A
JPS572838A JP7669380A JP7669380A JPS572838A JP S572838 A JPS572838 A JP S572838A JP 7669380 A JP7669380 A JP 7669380A JP 7669380 A JP7669380 A JP 7669380A JP S572838 A JPS572838 A JP S572838A
Authority
JP
Japan
Prior art keywords
hot working
internal quality
uniform internal
slabs
steel material
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
JP7669380A
Other languages
Japanese (ja)
Other versions
JPS601926B2 (en
Inventor
Takeshi Kubota
Michihiko Nanun
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 JP7669380A priority Critical patent/JPS601926B2/en
Publication of JPS572838A publication Critical patent/JPS572838A/en
Publication of JPS601926B2 publication Critical patent/JPS601926B2/en
Expired legal-status Critical Current

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Landscapes

  • Heat Treatment Of Steel (AREA)

Abstract

PURPOSE: To prevent segregation of alloy elements and impurities and obtain a steel material having uniform internal quality by subjecting slabs and the like to primary hot working under specific conditions then reheating these and subjecting the same to secondary hot working.
CONSTITUTION: After slabs or cast ingots are heated to Ac1 transformation point W1,250°C, they are subjected to primary hot working of ≥20% reduction of area at Ac1W≤1,200°C. Thence, the slabs or ingots are heated continuously or reheated from the temp. below the end temp. of the primary hot working, and are kept at ≥1,000°C for ≥3 hours, so that segregated elements are diffused sufficiently. Thence, they are subjected to prescribed secondary hot working. According to this method, the segregation of alloy elements and impurity elements is reduced, and steel materials having uniform internal quality for blank materials for lined pipes and the like are obtained.
COPYRIGHT: (C)1982,JPO&Japio
JP7669380A 1980-06-09 1980-06-09 Method for producing steel material with uniform internal quality Expired JPS601926B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7669380A JPS601926B2 (en) 1980-06-09 1980-06-09 Method for producing steel material with uniform internal quality

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7669380A JPS601926B2 (en) 1980-06-09 1980-06-09 Method for producing steel material with uniform internal quality

Publications (2)

Publication Number Publication Date
JPS572838A true JPS572838A (en) 1982-01-08
JPS601926B2 JPS601926B2 (en) 1985-01-18

Family

ID=13612550

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7669380A Expired JPS601926B2 (en) 1980-06-09 1980-06-09 Method for producing steel material with uniform internal quality

Country Status (1)

Country Link
JP (1) JPS601926B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57145924A (en) * 1981-03-05 1982-09-09 Nippon Steel Corp Production of steel material from ingot
JPS59197523A (en) * 1983-04-19 1984-11-09 Sumitomo Metal Ind Ltd Manufacture of hot rolled steel plate for processing
JPS61245390A (en) * 1985-04-18 1986-10-31 王子製紙株式会社 Method and apparatus for deinking old paper
JPS62180013A (en) * 1986-02-04 1987-08-07 Nippon Kokan Kk <Nkk> Manufacture of nontemper high tension steel plate having low welding crack susceptibility
JPS62289690A (en) * 1986-06-02 1987-12-16 三菱製紙株式会社 Pulp bleaching apparatus
JPS63152491A (en) * 1986-12-10 1988-06-24 泉製紙有限会社 Deinking apparatus for pulping treatment of papermaking old paper raw material

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57145924A (en) * 1981-03-05 1982-09-09 Nippon Steel Corp Production of steel material from ingot
JPS62967B2 (en) * 1981-03-05 1987-01-10 Nippon Steel Corp
JPS59197523A (en) * 1983-04-19 1984-11-09 Sumitomo Metal Ind Ltd Manufacture of hot rolled steel plate for processing
JPS61245390A (en) * 1985-04-18 1986-10-31 王子製紙株式会社 Method and apparatus for deinking old paper
JPS62180013A (en) * 1986-02-04 1987-08-07 Nippon Kokan Kk <Nkk> Manufacture of nontemper high tension steel plate having low welding crack susceptibility
JPS62289690A (en) * 1986-06-02 1987-12-16 三菱製紙株式会社 Pulp bleaching apparatus
JPS63152491A (en) * 1986-12-10 1988-06-24 泉製紙有限会社 Deinking apparatus for pulping treatment of papermaking old paper raw material

Also Published As

Publication number Publication date
JPS601926B2 (en) 1985-01-18

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