GB815095A - Method for improving the machinability of steel - Google Patents

Method for improving the machinability of steel

Info

Publication number
GB815095A
GB815095A GB26496/55A GB2649655A GB815095A GB 815095 A GB815095 A GB 815095A GB 26496/55 A GB26496/55 A GB 26496/55A GB 2649655 A GB2649655 A GB 2649655A GB 815095 A GB815095 A GB 815095A
Authority
GB
United Kingdom
Prior art keywords
per cent
steel
copper
steels
machining
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
GB26496/55A
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.)
Lasalle Steel Co
Original Assignee
Lasalle Steel Co
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 Lasalle Steel Co filed Critical Lasalle Steel Co
Publication of GB815095A publication Critical patent/GB815095A/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
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • 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
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2261/00—Machining or cutting being involved

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

A method of machining free cutting steels comprises the step of removing metal in a machining operation from steel containing Cu in amount greater than 0.06 per cent by weight and N in amount greater than 0.001 per cent by weight. Preferably the Cu content is between 0.06 and 0.6 per cent. The steel may also contain S 0.01-1.0 per cent, P 0.01-0.2 per cent and one or more of Ni, V, Cr and Mo up to 0.05 per cent each. The steel may be worked prior to machining, e.g. by a drawing operation which preferably achieves a reduction of cross sectional area greater than 20 per cent, and then strain relieved at a temperature above 550 DEG F. but below the lower critical temperature. The steels may be low carbon steels with C less than 0.25 per cent, medium carbon steels with C 0.25-0.5 per cent or high carbon steels with C above 0.5 per cent. Cu may be added to the steel as elemental Cu, copper oxygen sulphide, copper sulphide, copper sulphate or as a master alloy containing copper such as an iron-copper-sulphur alloy. Specifications 761,150, 761,151 [both in Group XXII] are referred to.
GB26496/55A 1954-09-30 1955-09-15 Method for improving the machinability of steel Expired GB815095A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US815095XA 1954-09-30 1954-09-30

Publications (1)

Publication Number Publication Date
GB815095A true GB815095A (en) 1959-06-17

Family

ID=22164646

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26496/55A Expired GB815095A (en) 1954-09-30 1955-09-15 Method for improving the machinability of steel

Country Status (1)

Country Link
GB (1) GB815095A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6737019B2 (en) 2002-03-12 2004-05-18 Mitsubishi Steel Mfg. Co., Ltd. Sulfur-containing free-cutting steel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6737019B2 (en) 2002-03-12 2004-05-18 Mitsubishi Steel Mfg. Co., Ltd. Sulfur-containing free-cutting steel

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