JPS5585627A - Manufacture of nickel base normalized steel excellent in low temperature toughness - Google Patents

Manufacture of nickel base normalized steel excellent in low temperature toughness

Info

Publication number
JPS5585627A
JPS5585627A JP15817078A JP15817078A JPS5585627A JP S5585627 A JPS5585627 A JP S5585627A JP 15817078 A JP15817078 A JP 15817078A JP 15817078 A JP15817078 A JP 15817078A JP S5585627 A JPS5585627 A JP S5585627A
Authority
JP
Japan
Prior art keywords
temp
steel
manufacture
low temperature
soln
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
JP15817078A
Other languages
Japanese (ja)
Other versions
JPS609568B2 (en
Inventor
Hidesato Mabuchi
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 JP15817078A priority Critical patent/JPS609568B2/en
Publication of JPS5585627A publication Critical patent/JPS5585627A/en
Publication of JPS609568B2 publication Critical patent/JPS609568B2/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
    • C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys

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

Abstract

PURPOSE:To make the distribution of AlN in Ni base normalized steel even and fine to improve low-temp. toughness remarkably, by adjusting Al and N contents of the steel, by continuing heat treatment of the steel after it is cooled to a temp. not higher than that at which Al and N forms supersaturated solid soln. CONSTITUTION:A low-alloy steel composed of 0.05-0.30% C, 0.02-0.60% Si, 0.02-2.00% Mn, 0.02-2.50% Cr, 1.0-10.0% Ni, Mo>=(Ni+Cr+Mn)/50, or in addn., one or more members selected from the group consisting of Cu, V, Nb, Co, B. The steel contains 20-300ppm N, and 0.01-0.02 excess Al defined by sol. Al-2(N-0.3Ti). The slab is subjected to soln. treatment by heating it to a temp. not lower than that at which Al-N forms solid soln., then it is forged or rolled. It is cooled to a temp. 500-600 deg.C at which Al, N form supersaturated solid soln. Finally it is subjected to annealing, hardening, and tempering at a temp. not lower than 650-710 deg.C, i.e., high-temp. ferritic zone. Hereby low-temp. toughness of the steel is improved.
JP15817078A 1978-12-23 1978-12-23 Method for producing Ni-based tempered steel with excellent low-temperature toughness Expired JPS609568B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15817078A JPS609568B2 (en) 1978-12-23 1978-12-23 Method for producing Ni-based tempered steel with excellent low-temperature toughness

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15817078A JPS609568B2 (en) 1978-12-23 1978-12-23 Method for producing Ni-based tempered steel with excellent low-temperature toughness

Publications (2)

Publication Number Publication Date
JPS5585627A true JPS5585627A (en) 1980-06-27
JPS609568B2 JPS609568B2 (en) 1985-03-11

Family

ID=15665798

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15817078A Expired JPS609568B2 (en) 1978-12-23 1978-12-23 Method for producing Ni-based tempered steel with excellent low-temperature toughness

Country Status (1)

Country Link
JP (1) JPS609568B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110592470A (en) * 2019-08-22 2019-12-20 江阴兴澄特种钢铁有限公司 Large-thickness SA302GrC steel plate with low-temperature toughness and preparation method thereof
CN113549746A (en) * 2021-07-29 2021-10-26 江苏联峰能源装备有限公司 Forging and heat treatment process of steel for 20MnMo tube plate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110592470A (en) * 2019-08-22 2019-12-20 江阴兴澄特种钢铁有限公司 Large-thickness SA302GrC steel plate with low-temperature toughness and preparation method thereof
CN113549746A (en) * 2021-07-29 2021-10-26 江苏联峰能源装备有限公司 Forging and heat treatment process of steel for 20MnMo tube plate

Also Published As

Publication number Publication date
JPS609568B2 (en) 1985-03-11

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