JPS5726125A - Production of hot rolled steel plate of superior longitudinal crack resistance having low yield ratio and high tensile strength - Google Patents

Production of hot rolled steel plate of superior longitudinal crack resistance having low yield ratio and high tensile strength

Info

Publication number
JPS5726125A
JPS5726125A JP9981780A JP9981780A JPS5726125A JP S5726125 A JPS5726125 A JP S5726125A JP 9981780 A JP9981780 A JP 9981780A JP 9981780 A JP9981780 A JP 9981780A JP S5726125 A JPS5726125 A JP S5726125A
Authority
JP
Japan
Prior art keywords
steel plate
high tensile
crack resistance
yield ratio
contg
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
JP9981780A
Other languages
Japanese (ja)
Other versions
JPS618128B2 (en
Inventor
Takayoshi Shimomura
Koichi Osawa
Takeshi Okuyama
Masataka Sakawa
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 Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan 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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP9981780A priority Critical patent/JPS5726125A/en
Publication of JPS5726125A publication Critical patent/JPS5726125A/en
Publication of JPS618128B2 publication Critical patent/JPS618128B2/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
    • 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

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 Strip Materials And Filament Materials (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Abstract

PURPOSE:To improve the longitudinal crack resistance of a steel plate by hot rolling and heat treating a slab for a low yield ratio high tensile hot-rolled steel plate contg. specific elements under specific temp. conditions thereby working the same to a steel plate. CONSTITUTION:A steel slab contg. 0.03-0.15% C, 0.03-0.80% Si, 1-2% Mn, <0.020% P, <0.010% S, 0.010-0.10% solAl, <0.030% As+Sn+Sb, contg. >=1 kind of V, Ti, Zr, Nb, B at 0.001-0.15% or contg. >=1 kind of Cr, Ni, Mo, Cu at 0.01-1.50% is hot-rolled and is finish-rolled at temps. above the Ar3 point. This is coiled below the Ar1 point, and the coil is heated to 750-900 deg.C temps. in a heat treatment furnace, after which it is cooled down to 600-250 deg.C at 5-50 deg.C/ sec cooling rates from said temps. The resultant long yield ratio high tensile hot- rolled steel plate has superior longitudinal crack resistance and is suited as a material for automotive bodies.
JP9981780A 1980-07-23 1980-07-23 Production of hot rolled steel plate of superior longitudinal crack resistance having low yield ratio and high tensile strength Granted JPS5726125A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9981780A JPS5726125A (en) 1980-07-23 1980-07-23 Production of hot rolled steel plate of superior longitudinal crack resistance having low yield ratio and high tensile strength

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9981780A JPS5726125A (en) 1980-07-23 1980-07-23 Production of hot rolled steel plate of superior longitudinal crack resistance having low yield ratio and high tensile strength

Publications (2)

Publication Number Publication Date
JPS5726125A true JPS5726125A (en) 1982-02-12
JPS618128B2 JPS618128B2 (en) 1986-03-12

Family

ID=14257388

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9981780A Granted JPS5726125A (en) 1980-07-23 1980-07-23 Production of hot rolled steel plate of superior longitudinal crack resistance having low yield ratio and high tensile strength

Country Status (1)

Country Link
JP (1) JPS5726125A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57145929A (en) * 1981-03-06 1982-09-09 Nippon Kokan Kk <Nkk> Production of hot-rolled high-tensile steel plate of high workability
JP2006342387A (en) * 2005-06-08 2006-12-21 Sumitomo Metal Ind Ltd High-strength hot-rolled steel sheet and its manufacturing method
CN103667911A (en) * 2013-12-13 2014-03-26 莱芜钢铁集团有限公司 Low yield ratio X100 high-grade steel pipeline steel hot-rolled steel plate and manufacturing method thereof
CN109825766A (en) * 2019-02-28 2019-05-31 邯郸钢铁集团有限责任公司 A kind of 460MPa high-strength steel reducing lobe defect and its production method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106381453B (en) * 2016-09-22 2018-12-07 三明市毅君机械铸造有限公司 A kind of cast steel components and its production technology for nuclear power unit

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57145929A (en) * 1981-03-06 1982-09-09 Nippon Kokan Kk <Nkk> Production of hot-rolled high-tensile steel plate of high workability
JPS623212B2 (en) * 1981-03-06 1987-01-23 Nippon Kokan Kk
JP2006342387A (en) * 2005-06-08 2006-12-21 Sumitomo Metal Ind Ltd High-strength hot-rolled steel sheet and its manufacturing method
JP4539447B2 (en) * 2005-06-08 2010-09-08 住友金属工業株式会社 High strength hot rolled steel sheet and method for producing the same
CN103667911A (en) * 2013-12-13 2014-03-26 莱芜钢铁集团有限公司 Low yield ratio X100 high-grade steel pipeline steel hot-rolled steel plate and manufacturing method thereof
CN103667911B (en) * 2013-12-13 2015-12-02 莱芜钢铁集团有限公司 Low yield strength ratio X100 Hi-grade steel pipeline steel hot rolled steel plate and manufacture method thereof
CN109825766A (en) * 2019-02-28 2019-05-31 邯郸钢铁集团有限责任公司 A kind of 460MPa high-strength steel reducing lobe defect and its production method

Also Published As

Publication number Publication date
JPS618128B2 (en) 1986-03-12

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