JPS5594438A - Production of low yield ratio high strength composite structure steel plate of superior artificial age hardness after working - Google Patents

Production of low yield ratio high strength composite structure steel plate of superior artificial age hardness after working

Info

Publication number
JPS5594438A
JPS5594438A JP122979A JP122979A JPS5594438A JP S5594438 A JPS5594438 A JP S5594438A JP 122979 A JP122979 A JP 122979A JP 122979 A JP122979 A JP 122979A JP S5594438 A JPS5594438 A JP S5594438A
Authority
JP
Japan
Prior art keywords
working
temperature
low yield
yield ratio
hot
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
JP122979A
Other languages
Japanese (ja)
Other versions
JPS5742125B2 (en
Inventor
Takashi Furukawa
Michio Endo
Nagayasu Takemoto
Kunio Watanabe
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 JP122979A priority Critical patent/JPS5594438A/en
Priority to AU54401/80A priority patent/AU527097B2/en
Priority to DE19803000910 priority patent/DE3000910A1/en
Priority to FR8000561A priority patent/FR2446323A1/en
Priority to GB8001116A priority patent/GB2046786B/en
Publication of JPS5594438A publication Critical patent/JPS5594438A/en
Publication of JPS5742125B2 publication Critical patent/JPS5742125B2/ja
Priority to US06/740,352 priority patent/US4614551A/en
Granted legal-status Critical Current

Links

Landscapes

  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Abstract

PURPOSE: To let good low yield ratio and artificial age hardness after working be stably obtained by hot-rolling the steel of the specified composition, quenching the same under the specific temperature conditions and controlling the variations and upper limit of coiling temperature.
CONSTITUTION: The steel containing C; 0.03W0.13%, Mn; 0.8W1.7%, Al; 0.1% or less is hot-rolled and its finishing temperature is kept at 750W860°C to make the 2-phase coexistence temperature region of ferrite α and austenite γ. Thence, it is quenched at the mean cooling rate of 30W500°C/sec. and is coiled at 230°C or less. The upper and lower limits of the variations of the temperature at this coiling are so controlled as to come within the temperature width of 100°C. This methods yields the hot-rolled steel plate of low yield ratio and high strength which has composite structure as hot-rolled and is superior in artificial age hardness after working. If this is used for automotive material and the like, the thickness of the material may be reduced.
COPYRIGHT: (C)1980,JPO&Japio
JP122979A 1979-01-12 1979-01-12 Production of low yield ratio high strength composite structure steel plate of superior artificial age hardness after working Granted JPS5594438A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP122979A JPS5594438A (en) 1979-01-12 1979-01-12 Production of low yield ratio high strength composite structure steel plate of superior artificial age hardness after working
AU54401/80A AU527097B2 (en) 1979-01-12 1980-01-07 Artifically aged low yield to tensile strength ratio high strength steel sheet
DE19803000910 DE3000910A1 (en) 1979-01-12 1980-01-11 STEEL SHEET AND METHOD FOR THE PRODUCTION THEREOF
FR8000561A FR2446323A1 (en) 1979-01-12 1980-01-11 PROCESS FOR THE MANUFACTURE OF TWO-PHASE STEEL SHEETS HAVING HIGH TENSILE STRENGTH AND A LOW-ELASTIC LIMIT / TENSILE STRENGTH AS WELL AS EXCELLENT AGING PROPERTIES AFTER WORK, AND THE PRODUCT THUS OBTAINED
GB8001116A GB2046786B (en) 1979-01-12 1980-01-14 Two-phase high strength hot rolled steel sheet
US06/740,352 US4614551A (en) 1979-01-12 1985-06-03 Process for producing low yield ratio, high strength two-phase steel sheet having excellent artificial ageing property after working

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP122979A JPS5594438A (en) 1979-01-12 1979-01-12 Production of low yield ratio high strength composite structure steel plate of superior artificial age hardness after working

Publications (2)

Publication Number Publication Date
JPS5594438A true JPS5594438A (en) 1980-07-17
JPS5742125B2 JPS5742125B2 (en) 1982-09-07

Family

ID=11495634

Family Applications (1)

Application Number Title Priority Date Filing Date
JP122979A Granted JPS5594438A (en) 1979-01-12 1979-01-12 Production of low yield ratio high strength composite structure steel plate of superior artificial age hardness after working

Country Status (1)

Country Link
JP (1) JPS5594438A (en)

Also Published As

Publication number Publication date
JPS5742125B2 (en) 1982-09-07

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