DK0838534T3 - Process for obtaining an improved resulfurized fine-grained austenitic steel - Google Patents

Process for obtaining an improved resulfurized fine-grained austenitic steel

Info

Publication number
DK0838534T3
DK0838534T3 DK97203234T DK97203234T DK0838534T3 DK 0838534 T3 DK0838534 T3 DK 0838534T3 DK 97203234 T DK97203234 T DK 97203234T DK 97203234 T DK97203234 T DK 97203234T DK 0838534 T3 DK0838534 T3 DK 0838534T3
Authority
DK
Denmark
Prior art keywords
resulfurized
fine
metals
wire
coatings
Prior art date
Application number
DK97203234T
Other languages
Danish (da)
Inventor
Gianfranco Chioatto
Giovanni Maccio'
Original Assignee
Lucchini S P A
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 Lucchini S P A filed Critical Lucchini S P A
Application granted granted Critical
Publication of DK0838534T3 publication Critical patent/DK0838534T3/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
    • C22C38/002—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)
  • Heat Treatment Of Steel (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

Disclosed is a particular type of fine-austenitic-grain globular-sulfides resulfurized carbon and/or alloy steel suitable for casehardening and hardening-tempering treatments, with the addition of transition metals of Group III (rare earth metals or lanthanides), in form of non-coated wire or wire coated with metals, metal alloys or still other coatings, such as ceramic coating or other types of coatings. The addition of rare earths as metal wire to ingot mould or tundish allows rare earth elements to be perfectly diffused and homogenized throughout the product and globular sulfides to be homogeneously distributed as well throughout the cast section; the resulting steel displays better machinability properties than steel produced by means of traditional techniques.
DK97203234T 1996-10-25 1997-10-16 Process for obtaining an improved resulfurized fine-grained austenitic steel DK0838534T3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT96MI002219A IT1286045B1 (en) 1996-10-25 1996-10-25 IMPROVED RESOLFORATED FINE AUSTENITIC GRAIN STEEL AND RELATED PROCEDURE TO OBTAIN IT

Publications (1)

Publication Number Publication Date
DK0838534T3 true DK0838534T3 (en) 2001-11-05

Family

ID=11375098

Family Applications (1)

Application Number Title Priority Date Filing Date
DK97203234T DK0838534T3 (en) 1996-10-25 1997-10-16 Process for obtaining an improved resulfurized fine-grained austenitic steel

Country Status (9)

Country Link
EP (1) EP0838534B1 (en)
AT (1) ATE203282T1 (en)
DE (1) DE69705691T2 (en)
DK (1) DK0838534T3 (en)
ES (1) ES2160891T3 (en)
GR (1) GR3036834T3 (en)
IT (1) IT1286045B1 (en)
PT (1) PT838534E (en)
SI (1) SI0838534T1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10047642A1 (en) 2000-09-26 2002-04-11 Basf Ag Process for the dehydrogenation of hydrocarbons
DE10060099A1 (en) 2000-12-04 2002-06-06 Basf Ag Regeneration of a dehydrogenation catalyst
DE10150811A1 (en) 2001-10-15 2003-04-24 Basf Ag Dehydrogenation of alkanes, e.g. propane to propene, comprises dehydrogenation of ethylbenzene to styrene to form hydrogen containing waste gas stream and heterogeneous catalyzed dehydrogenation of the alkane mixed with the hydrogen
JP4041511B2 (en) * 2005-10-17 2008-01-30 株式会社神戸製鋼所 Low-carbon sulfur free-cutting steel with excellent machinability
KR101781656B1 (en) 2009-05-20 2017-10-10 바스프 에스이 Monolith catalyst and use thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2421948A1 (en) * 1978-04-06 1979-11-02 Pro Chi Met Produits Chim Meta PROCESS FOR THE PREPARATION OF FERROUS ALLOYS SENSITIVELY FREE OF CERIUM, ALLOWING IN PARTICULAR IMPROVEMENT OF THEIR MECHANICAL PROPERTIES THANKS TO THE USE OF LANTHANE, AND FERROUS ALLOYS OBTAINED BY THIS PROCESS
EP0011365A1 (en) * 1978-10-02 1980-05-28 W.A. TYZACK & COMPANY LIMITED Agricultural mould-boards and method for manufacturing same
US4806304A (en) * 1983-05-09 1989-02-21 Daido Tokushuko Kabushiki Kaisha Free cutting steel
JPS6223970A (en) * 1985-07-24 1987-01-31 Nippon Steel Corp Continuously cast low-carbon sulfur-lead free-cutting steel
US4786466A (en) * 1987-02-19 1988-11-22 Frema, Inc. Low-sulfur, lead-free free machining steel alloy
JP2671086B2 (en) * 1992-09-22 1997-10-29 新日本製鐵株式会社 Low carbon sulfur free cutting steel by continuous casting method

Also Published As

Publication number Publication date
SI0838534T1 (en) 2001-12-31
DE69705691D1 (en) 2001-08-23
IT1286045B1 (en) 1998-07-07
EP0838534B1 (en) 2001-07-18
ES2160891T3 (en) 2001-11-16
EP0838534A1 (en) 1998-04-29
DE69705691T2 (en) 2002-07-04
PT838534E (en) 2001-12-28
ATE203282T1 (en) 2001-08-15
GR3036834T3 (en) 2002-01-31
ITMI962219A1 (en) 1998-04-25

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