JPS55131125A - Production of unmodified high-strength high-toughness steel - Google Patents

Production of unmodified high-strength high-toughness steel

Info

Publication number
JPS55131125A
JPS55131125A JP3823479A JP3823479A JPS55131125A JP S55131125 A JPS55131125 A JP S55131125A JP 3823479 A JP3823479 A JP 3823479A JP 3823479 A JP3823479 A JP 3823479A JP S55131125 A JPS55131125 A JP S55131125A
Authority
JP
Japan
Prior art keywords
strength
steel
slab
unmodified
toughness
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
JP3823479A
Other languages
Japanese (ja)
Other versions
JPS5814848B2 (en
Inventor
Hiroo Matsuda
Hiroshi Tamehiro
Mamoru Ohashi
Hajime Nakasugi
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 JP54038234A priority Critical patent/JPS5814848B2/en
Priority to DE19803012139 priority patent/DE3012139A1/en
Priority to IT21017/80A priority patent/IT1130093B/en
Publication of JPS55131125A publication Critical patent/JPS55131125A/en
Publication of JPS5814848B2 publication Critical patent/JPS5814848B2/en
Expired 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling

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)
  • Heat Treatment Of Steel (AREA)

Abstract

PURPOSE: To produce the unmodified high-strength, high-toughness steel of superior base metal and welded part by subjecting the continuously cast slab of the steel of extremely small S contents and added with Ca, Ti in combination to heating and controlled-rolling at the specific temperatures.
CONSTITUTION: The low S steel containing C; 0.01W0.15%, Si<0.6%, Mn; 0.5W 2.0%, Al; 0.01W0.08%, S<0.004%, Ca. 0.0005W0.005%, Ti; 0.008W0.025%, N; 0.001W0.007% or further one or two or more kinds of Nb<0.08%, V<0.10%, Ni<2.0%, Cu<1.0%, Cr<1.0%, Mo<0.4% is cast to a slab of 300mm or less in thickness by a continuous casting process. This slab is heated to 900W1,000°C and is hot-rolled. At this time, it is subjected to the controlled-rolling under 60% or more of draft at 850°C or less and its finishing temperature is held at 650W750°C whereby the strength and toughness are considerably improved.
COPYRIGHT: (C)1980,JPO&Japio
JP54038234A 1979-03-30 1979-03-30 Manufacturing method of non-tempered high-strength, high-toughness steel Expired JPS5814848B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP54038234A JPS5814848B2 (en) 1979-03-30 1979-03-30 Manufacturing method of non-tempered high-strength, high-toughness steel
DE19803012139 DE3012139A1 (en) 1979-03-30 1980-03-28 High tensile, hot rolled steel plate - with very high notch toughness at sub-zero temps. in rolled state, and suitable for welding
IT21017/80A IT1130093B (en) 1979-03-30 1980-03-28 PROCEDURE TO PRODUCE A LAMINATED STEEL, VERY RESISTANT AND VERY TOUGH

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54038234A JPS5814848B2 (en) 1979-03-30 1979-03-30 Manufacturing method of non-tempered high-strength, high-toughness steel

Publications (2)

Publication Number Publication Date
JPS55131125A true JPS55131125A (en) 1980-10-11
JPS5814848B2 JPS5814848B2 (en) 1983-03-22

Family

ID=12519602

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54038234A Expired JPS5814848B2 (en) 1979-03-30 1979-03-30 Manufacturing method of non-tempered high-strength, high-toughness steel

Country Status (3)

Country Link
JP (1) JPS5814848B2 (en)
DE (1) DE3012139A1 (en)
IT (1) IT1130093B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5792129A (en) * 1980-11-27 1982-06-08 Nippon Steel Corp Production of nonrefined high toughness steel
JPS63312951A (en) * 1987-06-15 1988-12-21 Kobe Steel Ltd Carbon-steel plate for boiler
JPH0417614A (en) * 1990-05-11 1992-01-22 Nkk Corp Manufacture of steel plate having satisfactory weldability and superior property of stopping propagation of fracture
JPH05255744A (en) * 1992-03-11 1993-10-05 Nippon Steel Corp Production of high tensile strength steel plate excellent in toughness at low temperature

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2502178B1 (en) * 1981-03-19 1986-06-20 Siderurgie Fse Inst Rech PROCESS FOR PRODUCING STRONG STEEL SHEETS
JPS5877528A (en) * 1981-10-31 1983-05-10 Nippon Steel Corp Manufacture of high tensile steel with superior toughness at low temperature
DE3323929A1 (en) * 1982-07-09 1984-01-12 Mannesmann AG, 4000 Düsseldorf Process for producing weldable large pipe sheets of fine grain structure
CS330783A2 (en) 1982-07-09 1984-06-18 Mannesmann Ag Zpusob vyroby plechu s jemnozrnnou strukturou z nizce legovane oceli pro vyrobu trub velkeho prumeru
JPS61127815A (en) * 1984-11-26 1986-06-16 Nippon Steel Corp Production of high arrest steel containing ni
US4880480A (en) * 1985-01-24 1989-11-14 Kabushiki Kaisha Kobe Seiko Sho High strength hot rolled steel sheet for wheel rims
DE3818879C1 (en) * 1988-06-01 1989-11-16 Mannesmann Ag, 4000 Duesseldorf, De
JPH0794687B2 (en) * 1989-03-29 1995-10-11 新日本製鐵株式会社 Method for producing HT80 steel excellent in high weldability, stress corrosion cracking resistance and low temperature toughness
JP2711163B2 (en) * 1990-01-12 1998-02-10 新日本製鐵株式会社 Method for producing high corrosion resistant low alloy linepipe steel with excellent corrosion resistance
US5858130A (en) * 1997-06-25 1999-01-12 Bethlehem Steel Corporation Composition and method for producing an alloy steel and a product therefrom for structural applications
CN110760659A (en) * 2019-09-27 2020-02-07 南京钢铁股份有限公司 Rolling process of weather-resistant welding wire steel for bridge

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5244719A (en) * 1975-10-06 1977-04-08 Nippon Steel Corp Method of producing thick steel plates having excellent low temperatur e touchness, low yield ratio and high tensile strength after rolling

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4138278A (en) * 1976-08-27 1979-02-06 Nippon Steel Corporation Method for producing a steel sheet having remarkably excellent toughness at low temperatures

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5244719A (en) * 1975-10-06 1977-04-08 Nippon Steel Corp Method of producing thick steel plates having excellent low temperatur e touchness, low yield ratio and high tensile strength after rolling

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5792129A (en) * 1980-11-27 1982-06-08 Nippon Steel Corp Production of nonrefined high toughness steel
JPS613370B2 (en) * 1980-11-27 1986-01-31 Nippon Steel Corp
JPS63312951A (en) * 1987-06-15 1988-12-21 Kobe Steel Ltd Carbon-steel plate for boiler
JPH0417614A (en) * 1990-05-11 1992-01-22 Nkk Corp Manufacture of steel plate having satisfactory weldability and superior property of stopping propagation of fracture
JPH05255744A (en) * 1992-03-11 1993-10-05 Nippon Steel Corp Production of high tensile strength steel plate excellent in toughness at low temperature

Also Published As

Publication number Publication date
IT8021017A0 (en) 1980-03-28
IT1130093B (en) 1986-06-11
JPS5814848B2 (en) 1983-03-22
DE3012139A1 (en) 1980-10-09

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