JPS5522473A - Production of slab having high hot workability - Google Patents

Production of slab having high hot workability

Info

Publication number
JPS5522473A
JPS5522473A JP9580878A JP9580878A JPS5522473A JP S5522473 A JPS5522473 A JP S5522473A JP 9580878 A JP9580878 A JP 9580878A JP 9580878 A JP9580878 A JP 9580878A JP S5522473 A JPS5522473 A JP S5522473A
Authority
JP
Japan
Prior art keywords
production
surface layer
slab
stainless steel
continuous casting
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
JP9580878A
Other languages
Japanese (ja)
Other versions
JPS611206B2 (en
Inventor
Hidemaro Takeuchi
Shogo Matsumura
Takeshi Katayama
Itsuo Ikuno
Koichi Takeda
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 JP9580878A priority Critical patent/JPS5522473A/en
Publication of JPS5522473A publication Critical patent/JPS5522473A/en
Publication of JPS611206B2 publication Critical patent/JPS611206B2/ja
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)
  • Continuous Casting (AREA)

Abstract

PURPOSE:To enhance hot workability by melting the surface layer of the nickel base stainless steel slab sthrough continuous casting then freezing the same at the specific rate of cooling. CONSTITUTION:The surface layer the nickel base stainless steel slab having been frozen through continuous casting is remelted by plasma arc, etc., after which it is cooled to freeze at the rates of cooling above 3 deg.C/sec in succession. Such treatment obviates the production of internal cracks and makes spacings between the secondary dendrite arms 30mu or under, thus yielding the fine columnar crystal or equiaxial crystal. Since the surface layer of the slab which receives working particularly strongly becomes the foregoing structure (b) from the structure (a), the production of cracks, etc. during hot working such as hot rolling or other is reduced.
JP9580878A 1978-08-08 1978-08-08 Production of slab having high hot workability Granted JPS5522473A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9580878A JPS5522473A (en) 1978-08-08 1978-08-08 Production of slab having high hot workability

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9580878A JPS5522473A (en) 1978-08-08 1978-08-08 Production of slab having high hot workability

Publications (2)

Publication Number Publication Date
JPS5522473A true JPS5522473A (en) 1980-02-18
JPS611206B2 JPS611206B2 (en) 1986-01-14

Family

ID=14147714

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9580878A Granted JPS5522473A (en) 1978-08-08 1978-08-08 Production of slab having high hot workability

Country Status (1)

Country Link
JP (1) JPS5522473A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61118354A (en) * 1984-11-13 1986-06-05 Nippon Polyurethan Kogyo Kk Production of isocyanate derivative having light color
JPS6453704A (en) * 1987-08-22 1989-03-01 Nippon Steel Corp Manufacture of cr-ni base stainless steel having excellent hot workability

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61118354A (en) * 1984-11-13 1986-06-05 Nippon Polyurethan Kogyo Kk Production of isocyanate derivative having light color
JPS6453704A (en) * 1987-08-22 1989-03-01 Nippon Steel Corp Manufacture of cr-ni base stainless steel having excellent hot workability

Also Published As

Publication number Publication date
JPS611206B2 (en) 1986-01-14

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