DE3772511D1 - CALCIUM TREATED, BOR CONTAINING STEEL WITH IMPROVED MACHINABILITY. - Google Patents

CALCIUM TREATED, BOR CONTAINING STEEL WITH IMPROVED MACHINABILITY.

Info

Publication number
DE3772511D1
DE3772511D1 DE8787850292T DE3772511T DE3772511D1 DE 3772511 D1 DE3772511 D1 DE 3772511D1 DE 8787850292 T DE8787850292 T DE 8787850292T DE 3772511 T DE3772511 T DE 3772511T DE 3772511 D1 DE3772511 D1 DE 3772511D1
Authority
DE
Germany
Prior art keywords
bor
improved machinability
containing steel
calcium
boron
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.)
Expired - Lifetime
Application number
DE8787850292T
Other languages
German (de)
Inventor
Vesa Ollilainen
Hannu Poentinen
Martti Paju
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.)
OVAKO STEEL HELSINKI FI Oy AB
Ovako Bar Oy
Original Assignee
OVAKO STEEL HELSINKI FI Oy AB
Ovako Steel Oy
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 OVAKO STEEL HELSINKI FI Oy AB, Ovako Steel Oy filed Critical OVAKO STEEL HELSINKI FI Oy AB
Application granted granted Critical
Publication of DE3772511D1 publication Critical patent/DE3772511D1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Catalysts (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
  • Nozzles For Electric Vacuum Cleaners (AREA)

Abstract

The invention concerns a calcium-treated steel alloy, wherein the hardenability effect of boron is combined with an improved machinability. The chemical composition of the steel in percentages by weight is 0.01 - 0.5% carbon, 0.01 - 2.0% silicon, 0.4 - 1.6% manganese, 0.01 - 0.3% sulphur, 0 - 2.0% chromium, 0 - 0.8% molybdenum, 0.002 - 0.02% boron, 0 - 0.015% titanium, 0.005 - 0.014% aluminium, 0.0015 - 0.01% calcium and in addition B = (0.5 - 2) x (N - Ti/3.4), wherein B is the boron content, N the nitrogen content and Ti the titanium content in percentages by weight.
DE8787850292T 1986-09-29 1987-09-28 CALCIUM TREATED, BOR CONTAINING STEEL WITH IMPROVED MACHINABILITY. Expired - Lifetime DE3772511D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI863918A FI75870C (en) 1986-09-29 1986-09-29 Calcium treated boron alloy steel with improved cutability

Publications (1)

Publication Number Publication Date
DE3772511D1 true DE3772511D1 (en) 1991-10-02

Family

ID=8523221

Family Applications (2)

Application Number Title Priority Date Filing Date
DE8787850292T Expired - Lifetime DE3772511D1 (en) 1986-09-29 1987-09-28 CALCIUM TREATED, BOR CONTAINING STEEL WITH IMPROVED MACHINABILITY.
DE198787850292T Pending DE265402T1 (en) 1986-09-29 1987-09-28 CALCIUM TREATED, BOR CONTAINING STEEL WITH IMPROVED MACHINABILITY.

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE198787850292T Pending DE265402T1 (en) 1986-09-29 1987-09-28 CALCIUM TREATED, BOR CONTAINING STEEL WITH IMPROVED MACHINABILITY.

Country Status (4)

Country Link
EP (1) EP0265402B1 (en)
AT (1) ATE66700T1 (en)
DE (2) DE3772511D1 (en)
FI (1) FI75870C (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2725747B2 (en) * 1990-11-16 1998-03-11 大同特殊鋼株式会社 Steel for induction hardening
US5595614A (en) * 1995-01-24 1997-01-21 Caterpillar Inc. Deep hardening boron steel article having improved fracture toughness and wear characteristics
DE102010048134A1 (en) 2010-10-11 2012-04-12 Schaeffler Technologies Gmbh & Co. Kg tempering steel
JP5837837B2 (en) * 2012-02-08 2015-12-24 Ｊｆｅ条鋼株式会社 High-hardness BN free cutting steel with a tool life of 300HV10 or higher
CN104789878B (en) * 2015-05-05 2017-03-15 内蒙古包钢钢联股份有限公司 A kind of high-hardenability oil casing collar material seamless steel pipe and preparation method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2388214A (en) * 1941-08-27 1945-10-30 Bethlehem Steel Corp Machining steels
US3634073A (en) * 1969-07-09 1972-01-11 United States Steel Corp Free-machining steel, articles thereof and method of making
FR2088862A5 (en) * 1970-04-18 1972-01-07 Nippon Kokan Kk Free cutting steel
US4265660A (en) * 1979-07-03 1981-05-05 Henrik Giflo High-strength free-cutting steel able to support dynamic stresses

Also Published As

Publication number Publication date
DE265402T1 (en) 1990-02-08
FI863918A0 (en) 1986-09-29
EP0265402B1 (en) 1991-08-28
FI75870B (en) 1988-04-29
ATE66700T1 (en) 1991-09-15
EP0265402A1 (en) 1988-04-27
FI75870C (en) 1988-08-08

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee