JPS5723021A - Manufacture of nontempered high-strength rolled bar steel - Google Patents

Manufacture of nontempered high-strength rolled bar steel

Info

Publication number
JPS5723021A
JPS5723021A JP9812780A JP9812780A JPS5723021A JP S5723021 A JPS5723021 A JP S5723021A JP 9812780 A JP9812780 A JP 9812780A JP 9812780 A JP9812780 A JP 9812780A JP S5723021 A JPS5723021 A JP S5723021A
Authority
JP
Japan
Prior art keywords
nontempered
bar steel
manufacture
rolled bar
steel
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.)
Pending
Application number
JP9812780A
Other languages
Japanese (ja)
Inventor
Kazuhiko Nishida
Michitaka Fujita
Katsuhiro Uno
Masaki Sakamoto
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
Sumitomo Metal Industries 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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP9812780A priority Critical patent/JPS5723021A/en
Publication of JPS5723021A publication Critical patent/JPS5723021A/en
Pending 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
    • C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (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 manufacture a rolled bar steel having both high strength and high toughness by a method in which a steel containing regulated proportions of C, Si, Mn, V, solAl, N, etc., is conditioned into a finer structure and then subjected to a properly controlled rolling treatment. CONSTITUTION:A steel, containing 0.30-0.6% C, 1.8% or less Si, 0.60-0.20% Mn, 0.03-0.20% V, 0.020-0.060% sol. Al, 0.008-0.020% N, and Fe, together with 0.50% or less Cr as needed, is rolled under conditions of 800-1,050 deg.C and a draft of 30% or more (between 800 deg.C and 950 deg.C). Thus, a nontempered high- strength rolled bar steel having a structure consisting of proeutectoid ferrite and perlite colony of a fine grain size (more than JIS No.8 sieve),a tensile strength of 70kg/mm.<2> or more, and a yield point of 50kg/mm.<2> or more can be obtained only by rolling treatment.
JP9812780A 1980-07-16 1980-07-16 Manufacture of nontempered high-strength rolled bar steel Pending JPS5723021A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9812780A JPS5723021A (en) 1980-07-16 1980-07-16 Manufacture of nontempered high-strength rolled bar steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9812780A JPS5723021A (en) 1980-07-16 1980-07-16 Manufacture of nontempered high-strength rolled bar steel

Publications (1)

Publication Number Publication Date
JPS5723021A true JPS5723021A (en) 1982-02-06

Family

ID=14211603

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9812780A Pending JPS5723021A (en) 1980-07-16 1980-07-16 Manufacture of nontempered high-strength rolled bar steel

Country Status (1)

Country Link
JP (1) JPS5723021A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57120616A (en) * 1981-01-21 1982-07-27 Daido Steel Co Ltd Production of parts for mechanical structure
JPS57123921A (en) * 1981-01-23 1982-08-02 Daido Steel Co Ltd Production of structural steel
JPH0456727A (en) * 1990-06-27 1992-02-24 Nkk Corp Production of high strength steel for reinforcing bar
JP2008088473A (en) * 2006-09-29 2008-04-17 Daido Steel Co Ltd Method for manufacturing crankshaft

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57120616A (en) * 1981-01-21 1982-07-27 Daido Steel Co Ltd Production of parts for mechanical structure
JPH0115561B2 (en) * 1981-01-21 1989-03-17 Daido Steel Co Ltd
JPS57123921A (en) * 1981-01-23 1982-08-02 Daido Steel Co Ltd Production of structural steel
JPS6233287B2 (en) * 1981-01-23 1987-07-20 Daido Steel Co Ltd
JPH0456727A (en) * 1990-06-27 1992-02-24 Nkk Corp Production of high strength steel for reinforcing bar
JP2008088473A (en) * 2006-09-29 2008-04-17 Daido Steel Co Ltd Method for manufacturing crankshaft

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