FR2396805A2 - Quenched steels with optimum hardenability - obtd. by using specific amts. of boron, nitrogen, aluminium, and titanium and/or zirconium - Google Patents

Quenched steels with optimum hardenability - obtd. by using specific amts. of boron, nitrogen, aluminium, and titanium and/or zirconium

Info

Publication number
FR2396805A2
FR2396805A2 FR7721830A FR7721830A FR2396805A2 FR 2396805 A2 FR2396805 A2 FR 2396805A2 FR 7721830 A FR7721830 A FR 7721830A FR 7721830 A FR7721830 A FR 7721830A FR 2396805 A2 FR2396805 A2 FR 2396805A2
Authority
FR
France
Prior art keywords
ppm
boron
obtd
zirconium
aluminium
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
FR7721830A
Other languages
French (fr)
Other versions
FR2396805B2 (en
Inventor
Daniel Thivellier
Daniel Rousseau
Roland Tricot
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.)
Ugine Aciers SA
Original Assignee
Ugine Aciers SA
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 Ugine Aciers SA filed Critical Ugine Aciers SA
Priority to FR7721830A priority Critical patent/FR2396805A2/en
Publication of FR2396805A2 publication Critical patent/FR2396805A2/en
Application granted granted Critical
Publication of FR2396805B2 publication Critical patent/FR2396805B2/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

Borom steels in the quenched or case-hardened and quenched condition, with improved hardness and strength due to the optimum amts. of soluble boron (Bs) and insol B(B1). The total B(Bt) and effective N2(Ne) in ppm. comply with the formula:- 10Ne-18Bt - SO= -300+200; where Bt=20-60 ppm; Ne=N-Ti/5-Zr/10, all being in ppm. and N=total N2= 40-190; Ti + Zr/2 = 100-300 ppm. and the Ti or the Zr may be zero; Ne is min. 20ppm. So is the Al equiv. and =Al + V/1.9 + Nb/3.4 + Ta/6.7 and So=100-400ppm., esp. 200-400 ppm. when Bt is 30-60 ppm. The above addns. are prepd. made after careful deoxidn. of the steel. The above ratios of B, N2, Al, plus Ti and/or Zr provide optimum hardenability.
FR7721830A 1977-07-06 1977-07-06 Quenched steels with optimum hardenability - obtd. by using specific amts. of boron, nitrogen, aluminium, and titanium and/or zirconium Granted FR2396805A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7721830A FR2396805A2 (en) 1977-07-06 1977-07-06 Quenched steels with optimum hardenability - obtd. by using specific amts. of boron, nitrogen, aluminium, and titanium and/or zirconium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7721830A FR2396805A2 (en) 1977-07-06 1977-07-06 Quenched steels with optimum hardenability - obtd. by using specific amts. of boron, nitrogen, aluminium, and titanium and/or zirconium

Publications (2)

Publication Number Publication Date
FR2396805A2 true FR2396805A2 (en) 1979-02-02
FR2396805B2 FR2396805B2 (en) 1981-05-08

Family

ID=9193401

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7721830A Granted FR2396805A2 (en) 1977-07-06 1977-07-06 Quenched steels with optimum hardenability - obtd. by using specific amts. of boron, nitrogen, aluminium, and titanium and/or zirconium

Country Status (1)

Country Link
FR (1) FR2396805A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108085591A (en) * 2017-11-24 2018-05-29 南阳汉冶特钢有限公司 A kind of steel plate HTNM400 and its production method with low-welding crack-sensitive energy

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1009427A (en) *
FR1315054A (en) * 1961-10-24 1963-01-18 Ishikawajima Harima Heavy Ind Steels for high temperature case hardening
FR2000542A1 (en) * 1968-01-22 1969-09-12 Nippon Kokan Kk
FR2052823A5 (en) * 1969-06-21 1971-04-09 Nippon Kokan Kk
DE977847C (en) * 1965-02-07 1971-09-02 Huettenwerk Oberhausen Ag Use of steel as a material for armor plates or plates
FR2179008A1 (en) * 1972-04-03 1973-11-16 Nippon Steel Corp
SU432225A1 (en) * 1972-11-16 1974-06-15 Б. В. Иванов STEEL

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1009427A (en) *
FR1315054A (en) * 1961-10-24 1963-01-18 Ishikawajima Harima Heavy Ind Steels for high temperature case hardening
DE977847C (en) * 1965-02-07 1971-09-02 Huettenwerk Oberhausen Ag Use of steel as a material for armor plates or plates
FR2000542A1 (en) * 1968-01-22 1969-09-12 Nippon Kokan Kk
FR2052823A5 (en) * 1969-06-21 1971-04-09 Nippon Kokan Kk
FR2179008A1 (en) * 1972-04-03 1973-11-16 Nippon Steel Corp
SU432225A1 (en) * 1972-11-16 1974-06-15 Б. В. Иванов STEEL

Also Published As

Publication number Publication date
FR2396805B2 (en) 1981-05-08

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