SE8205037L - FJEDERSTAL - Google Patents

FJEDERSTAL

Info

Publication number
SE8205037L
SE8205037L SE8205037A SE8205037A SE8205037L SE 8205037 L SE8205037 L SE 8205037L SE 8205037 A SE8205037 A SE 8205037A SE 8205037 A SE8205037 A SE 8205037A SE 8205037 L SE8205037 L SE 8205037L
Authority
SE
Sweden
Prior art keywords
steel
boron
amount
added
oxygen
Prior art date
Application number
SE8205037A
Other languages
Swedish (sv)
Other versions
SE8205037D0 (en
Inventor
Bjoern Hugo Andersson
Carl Erik Grip
Erik Bertil Joergen Hagstad
Original Assignee
Ssab Svenskt Stal Ab
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20347719&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=SE8205037(L) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Ssab Svenskt Stal Ab filed Critical Ssab Svenskt Stal Ab
Priority to SE8205037A priority Critical patent/SE8205037L/en
Publication of SE8205037D0 publication Critical patent/SE8205037D0/en
Priority to PCT/SE1983/000310 priority patent/WO1984000981A1/en
Priority to AT83902908T priority patent/ATE32528T1/en
Priority to EP83902908A priority patent/EP0139649B1/en
Priority to DE8383902908T priority patent/DE3375699D1/en
Publication of SE8205037L publication Critical patent/SE8205037L/en
Priority to FI843928A priority patent/FI73467C/en

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
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60

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)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Heat Treatment Of Steel (AREA)
  • Springs (AREA)

Abstract

Steel and process for its manufacture which is suitable for the production of springs, especially leafsprings for vehicles. The steel which is vacuum-treated is an ordinary low-carbon steel with 0.20 - 0.40 % C. Its composition is incidentally characterised in that the oxygen content does not exceed 0.040 % and in that boron is added to an amount of 0.002 - 0.004 % and titanium to an amount of 0.015 - 0.050 %. The addition of boron causes the hardenability to increase greatly, thus making it possible to keep the carbon content low and, in consequence, reducing the danger of destructive decarbonisation. A characteristic of the process of production consists in the fact that the steel is produced in an oxygen converter in such a manner that the nitrogen content in the ladle does not exceed 20 ppm, in that it is subsequently subjected to vacuum treatment and in that Al is added so that the amount of uncombined oxygen drops to max. 40 ppm, whereafter titanium and boron are added prior to continuous casting and rolling.
SE8205037A 1982-09-06 1982-09-06 FJEDERSTAL SE8205037L (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
SE8205037A SE8205037L (en) 1982-09-06 1982-09-06 FJEDERSTAL
PCT/SE1983/000310 WO1984000981A1 (en) 1982-09-06 1983-09-05 Spring steel
AT83902908T ATE32528T1 (en) 1982-09-06 1983-09-05 SPRING STEEL.
EP83902908A EP0139649B1 (en) 1982-09-06 1983-09-05 Spring steel
DE8383902908T DE3375699D1 (en) 1982-09-06 1983-09-05 Spring steel
FI843928A FI73467C (en) 1982-09-06 1984-10-05 FOERFARANDE ATT TILLVERKA ETT SJAELVANLOEPANDE STAOL.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8205037A SE8205037L (en) 1982-09-06 1982-09-06 FJEDERSTAL

Publications (2)

Publication Number Publication Date
SE8205037D0 SE8205037D0 (en) 1982-09-06
SE8205037L true SE8205037L (en) 1984-03-07

Family

ID=20347719

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8205037A SE8205037L (en) 1982-09-06 1982-09-06 FJEDERSTAL

Country Status (6)

Country Link
EP (1) EP0139649B1 (en)
AT (1) ATE32528T1 (en)
DE (1) DE3375699D1 (en)
FI (1) FI73467C (en)
SE (1) SE8205037L (en)
WO (1) WO1984000981A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5520591B2 (en) * 2009-12-18 2014-06-11 愛知製鋼株式会社 Steel and leaf spring parts for high fatigue strength leaf springs

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3009491A1 (en) * 1979-03-14 1980-09-25 Daido Steel Co Ltd STEEL FOR COLD FORGING AND METHOD FOR THE PRODUCTION THEREOF

Also Published As

Publication number Publication date
WO1984000981A1 (en) 1984-03-15
DE3375699D1 (en) 1988-03-24
SE8205037D0 (en) 1982-09-06
FI843928L (en) 1984-10-05
EP0139649A1 (en) 1985-05-08
FI843928A0 (en) 1984-10-05
ATE32528T1 (en) 1988-03-15
FI73467C (en) 1987-10-09
FI73467B (en) 1987-06-30
EP0139649B1 (en) 1988-02-17

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