JPS5653802A - Longitudinally short steel ingot - Google Patents

Longitudinally short steel ingot

Info

Publication number
JPS5653802A
JPS5653802A JP12866479A JP12866479A JPS5653802A JP S5653802 A JPS5653802 A JP S5653802A JP 12866479 A JP12866479 A JP 12866479A JP 12866479 A JP12866479 A JP 12866479A JP S5653802 A JPS5653802 A JP S5653802A
Authority
JP
Japan
Prior art keywords
steel ingot
short steel
thickness
longitudinally short
breadth
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
JP12866479A
Other languages
Japanese (ja)
Inventor
Hiroshi Ekusa
Yujo Marukawa
Setsuo Okamoto
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 JP12866479A priority Critical patent/JPS5653802A/en
Publication of JPS5653802A publication Critical patent/JPS5653802A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/02—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Abstract

PURPOSE:To contrive the improvement of the yield of the blooming work for preparing the longitudinally short steel ingot, by restricting the thickness/breadth ratio, by solidifying in the thickness direction, and by forming the taper zone in the longitudinal end of the casting mold in the direction perpendicular to the solidifying direction. CONSTITUTION:The flat coating mold, possessing the taper zones at both ends and the 1 or smaller value of the ratio H/D between the height H and the breadth D, is employed; the molten steel is poured into the mold and the longitudinally short steel ingot 1 possessing the truncated pyramid type part 3 at its longitudinal end is prepared. Hereupon, by applying the heat insulating material to the inner surface of the casting mold, the unidirectional solidifying direction 2 is set in the thickness direction. Besides, the principal dimensions of the pyramid part 3 are desired to satisfy next conditions. 50mm.<=l'<=400mm., 0.8T<=t''<=2.5T, t'=1/2(t-t''), 100mm.<= B-b<=400mm., 0.95B<=b''<=1.3B, b'=1/2(b-b''), where, B is the breadth of the product slab, and T is the thickness of the product slab. According to the present ingot manufacturing method, the crop loss of the longitudinally short steel ingot is reduced.
JP12866479A 1979-10-05 1979-10-05 Longitudinally short steel ingot Pending JPS5653802A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12866479A JPS5653802A (en) 1979-10-05 1979-10-05 Longitudinally short steel ingot

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12866479A JPS5653802A (en) 1979-10-05 1979-10-05 Longitudinally short steel ingot

Publications (1)

Publication Number Publication Date
JPS5653802A true JPS5653802A (en) 1981-05-13

Family

ID=14990385

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12866479A Pending JPS5653802A (en) 1979-10-05 1979-10-05 Longitudinally short steel ingot

Country Status (1)

Country Link
JP (1) JPS5653802A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58110101A (en) * 1981-07-21 1983-06-30 Mitsubishi Alum Co Ltd Hot rolling method for aluminum alloy slab
JPS5919001A (en) * 1982-07-22 1984-01-31 Nippon Kokan Kk <Nkk> Production of extremely thick steel plate having sound and uniform quality
JPS63101002A (en) * 1986-06-05 1988-05-06 Kobe Steel Ltd Production of steel sheet having excellent internal strength with decreased segregation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58110101A (en) * 1981-07-21 1983-06-30 Mitsubishi Alum Co Ltd Hot rolling method for aluminum alloy slab
JPS5919001A (en) * 1982-07-22 1984-01-31 Nippon Kokan Kk <Nkk> Production of extremely thick steel plate having sound and uniform quality
JPS63101002A (en) * 1986-06-05 1988-05-06 Kobe Steel Ltd Production of steel sheet having excellent internal strength with decreased segregation

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