US3784374A - Method of improving the machinability and mechanical properties of a steel - Google Patents

Method of improving the machinability and mechanical properties of a steel Download PDF

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Publication number
US3784374A
US3784374A US00141414A US3784374DA US3784374A US 3784374 A US3784374 A US 3784374A US 00141414 A US00141414 A US 00141414A US 3784374D A US3784374D A US 3784374DA US 3784374 A US3784374 A US 3784374A
Authority
US
United States
Prior art keywords
steel
sodium
selenium
machinability
oxysulphide
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
US00141414A
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English (en)
Inventor
E Almand
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.)
FRANCAISE DES ACIERS SPECIAUX Cie
Original Assignee
Creusot Loire 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 Creusot Loire SA filed Critical Creusot Loire SA
Application granted granted Critical
Publication of US3784374A publication Critical patent/US3784374A/en
Assigned to COMPAGNIE FRANCAISE DES ACIERS SPECIAUX reassignment COMPAGNIE FRANCAISE DES ACIERS SPECIAUX ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CREUSOT-LOIRE
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/076—Use of slags or fluxes as treating agents
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • a method of making steel which comprises adding to the molten steel a sodium oxysulphide and oneor more of selenium, tellurium and bismuth.
  • the preferred sodium oxysulphides are the sulphite (Na SO the hyposulphite (Na s o land the metabisulphite (Na S O It is also possible to use the acid bisulphite (HNaSO although this is less advantageous.
  • the addition of sodium oxysulphide to the steel is made in the ladle and the addition of selenium, tellurium or bismuth (or a mixture of two or more thereof) is made in the ingot mould.
  • the total amount of selenium, tellurium and bismuth is preferably less than 0.060 percent, particularly from 0.015 percent to 0.025 percent.
  • the amount of tellurium is not greater than 0.020 percent.
  • a method of improving the machinability and mechanical properties of a steel which consists essentially of adding to the molten steel in the ladle a sodium oxysulphide and adding at least one element selected from the group consisting of selenium, tellurium and bismuth to the molten steel in the ingot mold, the total amount of selenium, tellurium and bismuth added to the steel being less than 0.060 percent.
  • sodium oxysulphide is selected from sodium sulphite, sodium hyposulphite and sodium metabisulphite.
  • a method of making steel which consists essentially of adding to the steel, while it is molten and in the ladle, a sodium oxysulphide and adding to the molten steel in the ingot mold from 0.015 to 0.025 percent in total of at least one element selected from the group consisting of selenium, tellurium and bismuth, tellerium being not greater than 0.020%.
  • sodium oxysulphide is selected from sodium sulphite, sodium hyposulphite and sodium metabisulphite.
  • a method of improving the machinability and mechanical properties of a steel which consists essentially of incorporating in the steel, whilst it is molten, sodium sulphite in the ladle and selenium in the ingot mold, and allowing the steel to cool whereby globules of sulphides are finely and homogeneously distributed throughout the steel.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
US00141414A 1970-05-08 1971-05-07 Method of improving the machinability and mechanical properties of a steel Expired - Lifetime US3784374A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7016776A FR2088015B1 (fr) 1970-05-08 1970-05-08

Publications (1)

Publication Number Publication Date
US3784374A true US3784374A (en) 1974-01-08

Family

ID=9055244

Family Applications (1)

Application Number Title Priority Date Filing Date
US00141414A Expired - Lifetime US3784374A (en) 1970-05-08 1971-05-07 Method of improving the machinability and mechanical properties of a steel

Country Status (7)

Country Link
US (1) US3784374A (fr)
BE (1) BE763800A (fr)
CA (1) CA949754A (fr)
DE (1) DE2122746C3 (fr)
FR (1) FR2088015B1 (fr)
GB (1) GB1332566A (fr)
LU (1) LU62999A1 (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4161400A (en) * 1976-07-15 1979-07-17 Molycorp, Inc. Methods of desulphurizing fluid materials
US4224058A (en) * 1979-04-19 1980-09-23 Molycorp, Inc. Methods of desulphurizing fluid materials
US4244737A (en) * 1979-08-29 1981-01-13 Inland Steel Company Method and alloy for introducing machinability increasing ingredients to steel
EP0045815A1 (fr) * 1980-08-11 1982-02-17 Inland Steel Company Produit semi-fini en acier et procédé pour sa fabrication
US4507149A (en) * 1979-04-19 1985-03-26 Union Oil Company Of California Desulfurization of fluid materials
US4604268A (en) * 1979-04-19 1986-08-05 Kay Alan R Methods of desulfurizing gases
US4714598A (en) * 1979-04-19 1987-12-22 Kay D Alan R Methods of desulfurizing gases
US4826738A (en) * 1987-07-07 1989-05-02 United Technologies Corporation Oxidation and corrosion resistant chromia forming coatings
US4826664A (en) * 1980-07-31 1989-05-02 Kay D Alan R Methods of desulfurizing gases
US4857280A (en) * 1979-04-19 1989-08-15 Kay D Alan R Method for the regeneration of sulfided cerium oxide back to a form that is again capable of removing sulfur from fluid materials
US4885145A (en) * 1979-04-19 1989-12-05 Kay D Alan R Method for providing oxygen ion vacancies in lanthanide oxides
US4895201A (en) * 1987-07-07 1990-01-23 United Technologies Corporation Oxidation resistant superalloys containing low sulfur levels
US4908888A (en) * 1989-02-24 1990-03-20 Watkins Manufacturing Corporation Dry hydro-massage unit
US5326737A (en) * 1980-07-31 1994-07-05 Gas Desulfurization Corporation Cerium oxide solutions for the desulfurization of gases
CN106367563A (zh) * 2016-09-30 2017-02-01 武汉钢铁股份有限公司 一种冶炼含Se钢的方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2730045C2 (de) * 1977-07-02 1984-11-08 Krupp Stahl Ag, 4630 Bochum Verfahren zum Herstellen verschleißbeständiger Schienen und/oder Radwerkstoffen
DE2937908A1 (de) * 1978-09-20 1980-04-03 Daido Steel Co Ltd Te-s-automatenstahl mit niedriger anisotropie und verfahren zu seiner herstellung
DE3009491A1 (de) * 1979-03-14 1980-09-25 Daido Steel Co Ltd Stahl fuer das kaltschmieden und verfahren zu seiner herstellung

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1959758A (en) * 1933-03-13 1934-05-22 Jones & Laughlin Steel Corp Free cutting steel
US2204283A (en) * 1938-03-15 1940-06-11 Simonds Saw And Steel Co Tool steel
US2236716A (en) * 1940-08-23 1941-04-01 Republic Steel Corp Steel containing tellurium
US2272277A (en) * 1941-04-25 1942-02-10 Edwin L Ramsey Process of manufacturing steel
US3152890A (en) * 1963-11-14 1964-10-13 Inland Steel Co Free machining steel with sulphur plus tellurium and/or selenium
US3152889A (en) * 1961-10-31 1964-10-13 Inland Steel Co Free machining steel with lead and tellurium
US3169857A (en) * 1961-11-20 1965-02-16 Inland Steel Co Free machining steel with improved hot workability
US3192040A (en) * 1963-08-05 1965-06-29 Carpenter Steel Co Free machining alloy
US3574606A (en) * 1968-07-03 1971-04-13 Inland Steel Co Method for adding tellurium dioxide to molten steel

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1959758A (en) * 1933-03-13 1934-05-22 Jones & Laughlin Steel Corp Free cutting steel
US2204283A (en) * 1938-03-15 1940-06-11 Simonds Saw And Steel Co Tool steel
US2236716A (en) * 1940-08-23 1941-04-01 Republic Steel Corp Steel containing tellurium
US2272277A (en) * 1941-04-25 1942-02-10 Edwin L Ramsey Process of manufacturing steel
US3152889A (en) * 1961-10-31 1964-10-13 Inland Steel Co Free machining steel with lead and tellurium
US3169857A (en) * 1961-11-20 1965-02-16 Inland Steel Co Free machining steel with improved hot workability
US3192040A (en) * 1963-08-05 1965-06-29 Carpenter Steel Co Free machining alloy
US3152890A (en) * 1963-11-14 1964-10-13 Inland Steel Co Free machining steel with sulphur plus tellurium and/or selenium
US3574606A (en) * 1968-07-03 1971-04-13 Inland Steel Co Method for adding tellurium dioxide to molten steel

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4161400A (en) * 1976-07-15 1979-07-17 Molycorp, Inc. Methods of desulphurizing fluid materials
US4224058A (en) * 1979-04-19 1980-09-23 Molycorp, Inc. Methods of desulphurizing fluid materials
US4885145A (en) * 1979-04-19 1989-12-05 Kay D Alan R Method for providing oxygen ion vacancies in lanthanide oxides
US4507149A (en) * 1979-04-19 1985-03-26 Union Oil Company Of California Desulfurization of fluid materials
US4604268A (en) * 1979-04-19 1986-08-05 Kay Alan R Methods of desulfurizing gases
US4714598A (en) * 1979-04-19 1987-12-22 Kay D Alan R Methods of desulfurizing gases
US4857280A (en) * 1979-04-19 1989-08-15 Kay D Alan R Method for the regeneration of sulfided cerium oxide back to a form that is again capable of removing sulfur from fluid materials
US4244737A (en) * 1979-08-29 1981-01-13 Inland Steel Company Method and alloy for introducing machinability increasing ingredients to steel
US4826664A (en) * 1980-07-31 1989-05-02 Kay D Alan R Methods of desulfurizing gases
US5326737A (en) * 1980-07-31 1994-07-05 Gas Desulfurization Corporation Cerium oxide solutions for the desulfurization of gases
EP0045815A1 (fr) * 1980-08-11 1982-02-17 Inland Steel Company Produit semi-fini en acier et procédé pour sa fabrication
US4826738A (en) * 1987-07-07 1989-05-02 United Technologies Corporation Oxidation and corrosion resistant chromia forming coatings
US4895201A (en) * 1987-07-07 1990-01-23 United Technologies Corporation Oxidation resistant superalloys containing low sulfur levels
US4908888A (en) * 1989-02-24 1990-03-20 Watkins Manufacturing Corporation Dry hydro-massage unit
CN106367563A (zh) * 2016-09-30 2017-02-01 武汉钢铁股份有限公司 一种冶炼含Se钢的方法
CN106367563B (zh) * 2016-09-30 2018-06-12 武汉钢铁有限公司 一种冶炼含Se钢的方法

Also Published As

Publication number Publication date
DE2122746A1 (de) 1971-12-23
FR2088015B1 (fr) 1974-08-09
FR2088015A1 (fr) 1972-01-07
DE2122746B2 (de) 1973-03-01
LU62999A1 (fr) 1971-08-26
BE763800A (fr) 1971-08-02
CA949754A (en) 1974-06-25
GB1332566A (en) 1973-10-03
DE2122746C3 (de) 1973-09-20

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Owner name: COMPAGNIE FRANCAISE DES ACIERS SPECIAUX

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CREUSOT-LOIRE;REEL/FRAME:004432/0831

Effective date: 19850610

STCF Information on status: patent grant

Free format text: PATENTED FILE - (OLD CASE ADDED FOR FILE TRACKING PURPOSES)