JPS5773124A - Production of steel material having high breakdown toughness - Google Patents

Production of steel material having high breakdown toughness

Info

Publication number
JPS5773124A
JPS5773124A JP14972480A JP14972480A JPS5773124A JP S5773124 A JPS5773124 A JP S5773124A JP 14972480 A JP14972480 A JP 14972480A JP 14972480 A JP14972480 A JP 14972480A JP S5773124 A JPS5773124 A JP S5773124A
Authority
JP
Japan
Prior art keywords
thickness
steel
steel material
contg
intermediate stage
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
JP14972480A
Other languages
Japanese (ja)
Other versions
JPH0219174B2 (en
Inventor
Kentaro Okamoto
Masaji Nakao
Ryota Yamaba
Yukio Tomita
Shigenori Igari
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 JP14972480A priority Critical patent/JPS5773124A/en
Publication of JPS5773124A publication Critical patent/JPS5773124A/en
Publication of JPH0219174B2 publication Critical patent/JPH0219174B2/ja
Granted legal-status Critical Current

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  • Heat Treatment Of Steel (AREA)

Abstract

PURPOSE: To eliminate the degrading characteristic in the central part of plate thickness and improve breakdown toughness by hot rolling a steel material ingot cont. prescribed amts. of C, Mn, P, S as basic components under specific conditions.
CONSTITUTION: A steel contg. ≤0.3% C, 0.5W2.5% Mn, ≤0.02% P, and ≤0.01% S as basic components and if necessary, contg. other specific elements is produced. The ingot produced by continuosly casting this steel is heated to rollable temps., after which it is reduced of thickness down to intermediate stage thickness under the conditions wherein the composite pass rolling effect (CIRE) expressed by the equation is kept at ≤0.02. Thence, it is subjected to heat treatment according to the intermediate stage thickness, after which it is hot-rolled down to the final thickness.
COPYRIGHT: (C)1982,JPO&Japio
JP14972480A 1980-10-25 1980-10-25 Production of steel material having high breakdown toughness Granted JPS5773124A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14972480A JPS5773124A (en) 1980-10-25 1980-10-25 Production of steel material having high breakdown toughness

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14972480A JPS5773124A (en) 1980-10-25 1980-10-25 Production of steel material having high breakdown toughness

Publications (2)

Publication Number Publication Date
JPS5773124A true JPS5773124A (en) 1982-05-07
JPH0219174B2 JPH0219174B2 (en) 1990-04-27

Family

ID=15481421

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14972480A Granted JPS5773124A (en) 1980-10-25 1980-10-25 Production of steel material having high breakdown toughness

Country Status (1)

Country Link
JP (1) JPS5773124A (en)

Also Published As

Publication number Publication date
JPH0219174B2 (en) 1990-04-27

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