JPS5781901A - Hot rolling method for slab - Google Patents

Hot rolling method for slab

Info

Publication number
JPS5781901A
JPS5781901A JP15707280A JP15707280A JPS5781901A JP S5781901 A JPS5781901 A JP S5781901A JP 15707280 A JP15707280 A JP 15707280A JP 15707280 A JP15707280 A JP 15707280A JP S5781901 A JPS5781901 A JP S5781901A
Authority
JP
Japan
Prior art keywords
width
recesses
slab
screw down
fishtails
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
JP15707280A
Other languages
Japanese (ja)
Other versions
JPS5937121B2 (en
Inventor
Minoru Matsuzaki
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.)
JFE Steel Corp
Original Assignee
Kawasaki 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 Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP15707280A priority Critical patent/JPS5937121B2/en
Publication of JPS5781901A publication Critical patent/JPS5781901A/en
Publication of JPS5937121B2 publication Critical patent/JPS5937121B2/en
Expired 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
    • B21B1/026—Rolling
    • 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
    • B21B1/38—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 sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling

Abstract

PURPOSE:To reduce crop losses and to improve the accuracy of coil width by forming recesses on surfaces of either one of the leading end part and tail end part of a slab or a set of both surfaces which are faced to each other. CONSTITUTION:A slab 2 of example, width W1 is subjected to one reciprocation of screw down in its thickness direction and is thereby formed to a hand-drum shaped plane shape, after which recesses 14 are formed by rolling rolls on the broadside surfaces of both a leading end 4 and a tail end 6 which are faced to each other. If the recesses 14 are formed to width W3, lenght DELTAL, that is, depth DELTAW, metallic flow directed to the formation of fishtails during forming of the recesses 14 is completely absorbed in the recesses 14. The metallic flow accompanied with the thickness screw down and broadside screw down after this is absorbed as well, whereby the production of fishtails or tongues is completely prevented, and crop losses are minimized. Further, the rates of loss of width in both end parts 4, 6 with respect to the width in the central part are decreased and the accuracy of the width of coils is improved.
JP15707280A 1980-11-10 1980-11-10 Hot rolling method for steel billet Expired JPS5937121B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15707280A JPS5937121B2 (en) 1980-11-10 1980-11-10 Hot rolling method for steel billet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15707280A JPS5937121B2 (en) 1980-11-10 1980-11-10 Hot rolling method for steel billet

Publications (2)

Publication Number Publication Date
JPS5781901A true JPS5781901A (en) 1982-05-22
JPS5937121B2 JPS5937121B2 (en) 1984-09-07

Family

ID=15641616

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15707280A Expired JPS5937121B2 (en) 1980-11-10 1980-11-10 Hot rolling method for steel billet

Country Status (1)

Country Link
JP (1) JPS5937121B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6137302A (en) * 1984-07-30 1986-02-22 Nippon Steel Corp Method for hot rolling metallic slab in its width direction
JPS6195703A (en) * 1984-10-16 1986-05-14 Nippon Steel Corp Method for hot rolling metallic slab in its width direction

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5966618U (en) * 1982-10-27 1984-05-04 ダイハツ工業株式会社 Sunroof mounting device
JPS61233140A (en) * 1985-04-09 1986-10-17 株式会社大林組 Opening and closing type dome roof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6137302A (en) * 1984-07-30 1986-02-22 Nippon Steel Corp Method for hot rolling metallic slab in its width direction
JPS6195703A (en) * 1984-10-16 1986-05-14 Nippon Steel Corp Method for hot rolling metallic slab in its width direction

Also Published As

Publication number Publication date
JPS5937121B2 (en) 1984-09-07

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