GB617963A - Process for the manufacture of steel - Google Patents

Process for the manufacture of steel

Info

Publication number
GB617963A
GB617963A GB28608/45A GB2860845A GB617963A GB 617963 A GB617963 A GB 617963A GB 28608/45 A GB28608/45 A GB 28608/45A GB 2860845 A GB2860845 A GB 2860845A GB 617963 A GB617963 A GB 617963A
Authority
GB
United Kingdom
Prior art keywords
sulphite
sulphur
steel
sodium
added
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
Application number
GB28608/45A
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.)
Navistar Inc
Original Assignee
International Harverster Corp
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 International Harverster Corp filed Critical International Harverster Corp
Publication of GB617963A publication Critical patent/GB617963A/en
Expired 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
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
    • 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

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)

Abstract

To produce a steel of increased sulphur content and good machinability, there is added to a molten mass of steel a metallic sulphite which decomposes at the temperature of the molten mass to give up a substantial proportion of the sulphur as sulphur dioxide. The sulphite may be sodium sulphite, sodium bisulphate, potassium sulphite or lead sulphite added at the rate of 1-5 lbs. per ton of steel. The sodium oxide liberated from sodium sulphite reacts with refractory silicate and aluminate inclusions to remove them by fluxing. As an example, to produce a steel containing .55-.60 carbon, .60-.90 manganese, .04 maximum phosphorus, .04-.07 sulphur, and .15-.30 silicon, 3 lbs. of anhydrous sodium bisulphite were added to each ton of molten steel containing .55 carbon, .75 manganese, .016 phosphorus, .025 sulphur and .19 silicon. In the resultant steel the sulphur was increased to .045, all these figures being percentages by weight. The Specification as open to inspection under Sect. 91 states also that free sulphur may be added simultaneously with the metallic sulphite. This subject-matter does not appear in the Specification as accepted.
GB28608/45A 1941-04-25 1945-10-29 Process for the manufacture of steel Expired GB617963A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US617963XA 1941-04-25 1941-04-25

Publications (1)

Publication Number Publication Date
GB617963A true GB617963A (en) 1949-02-15

Family

ID=22038197

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28608/45A Expired GB617963A (en) 1941-04-25 1945-10-29 Process for the manufacture of steel

Country Status (2)

Country Link
DE (1) DE966624C (en)
GB (1) GB617963A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2335200A (en) * 1998-03-10 1999-09-15 British Steel Plc Steel composition

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE649947C (en) * 1935-06-25 1937-09-08 Neunkircher Eisenwerk A G Vorm Process for producing free cutting steel
US2272277A (en) * 1941-04-25 1942-02-10 Edwin L Ramsey Process of manufacturing steel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2335200A (en) * 1998-03-10 1999-09-15 British Steel Plc Steel composition

Also Published As

Publication number Publication date
DE966624C (en) 1957-08-29

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