GB1412601A - Manufacture of steel files - Google Patents

Manufacture of steel files

Info

Publication number
GB1412601A
GB1412601A GB5581172A GB5581172A GB1412601A GB 1412601 A GB1412601 A GB 1412601A GB 5581172 A GB5581172 A GB 5581172A GB 5581172 A GB5581172 A GB 5581172A GB 1412601 A GB1412601 A GB 1412601A
Authority
GB
United Kingdom
Prior art keywords
temperature
coil
files
strip
steel
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
GB5581172A
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.)
USS Engineers and Consultants Inc
Original Assignee
USS Engineers and Consultants Inc
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 USS Engineers and Consultants Inc filed Critical USS Engineers and Consultants Inc
Publication of GB1412601A publication Critical patent/GB1412601A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C21D1/32—Soft annealing, e.g. spheroidising
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/76—Adjusting the composition of the atmosphere
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling

Abstract

1412601 Heat treating seals USS ENGS & CONSULTANTS Inc 4 Dec 1972 [22 Dec 1971] 55811/72 Heading C7N [Also in Division B3] A method of making high carbon flat bar stock for steel files comprises hot rolling high-carbon steel into a slab, hot rolling the slab at a temperature within the range 1600-2200‹F, coiling the strip at a temperature above 1000‹F, furnaceannealing the coil at a temperature above the A 1 critical temperature for at least two hours in a reducing atmosphere, cooling the coil at a rate of about 20 to 40‹F per hour to a temperature of about 1250‹F to form spheroidized carbide precipitates, furnace-cooling the coil to a temperature below 400‹F, and slitting the uncoiled strip into bars having the width of the bar stock. The bars are then cut into file blanks. The annealing is preferably a box annealing within the range 1350‹ to 1380‹F with the dew point of the reducing atmosphere being adjusted, after the temperature has reached 1100‹ F, to 15. F. Prior to the slitting operation the strip may be given a light roll to eliminate coil set. The files may be produced by surface grinding the stock to remove the thin outer layer of pure iron and decarbonized steel and then cutting grooves or teeth. The files can then be rehardened by immersion in a molten lead bath at 1450‹F for 3 to 4 minutes followed by quenching in a saturated brine solution.
GB5581172A 1971-12-22 1972-12-04 Manufacture of steel files Expired GB1412601A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00211091A US3820372A (en) 1971-12-22 1971-12-22 Method of making flat steel files

Publications (1)

Publication Number Publication Date
GB1412601A true GB1412601A (en) 1975-11-05

Family

ID=22785564

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5581172A Expired GB1412601A (en) 1971-12-22 1972-12-04 Manufacture of steel files

Country Status (8)

Country Link
US (1) US3820372A (en)
JP (1) JPS4870615A (en)
AU (1) AU460981B2 (en)
BE (1) BE793276A (en)
CA (1) CA971776A (en)
DE (1) DE2261878A1 (en)
GB (1) GB1412601A (en)
SE (1) SE381287B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2158745A (en) * 1984-05-01 1985-11-20 Sumitomo Metal Ind Process and apparatus for direct softening heat treatment of rolled wire rods

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2712305B1 (en) * 1993-11-12 1996-02-02 Lorraine Laminage Narrow strips of high carbon steel and method of manufacturing such strips.
CN110551880A (en) * 2019-10-24 2019-12-10 成都先进金属材料产业技术研究院有限公司 softening heat treatment process for small-size 22Si2MnCrNi2MoA steel rolled material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2158745A (en) * 1984-05-01 1985-11-20 Sumitomo Metal Ind Process and apparatus for direct softening heat treatment of rolled wire rods
US4881987A (en) * 1984-05-01 1989-11-21 Sumitomo Metal Industries, Ltd. Process for direct softening heat treatment of rolled wire rods

Also Published As

Publication number Publication date
US3820372A (en) 1974-06-28
JPS4870615A (en) 1973-09-25
SE381287B (en) 1975-12-01
DE2261878A1 (en) 1973-06-28
BE793276A (en) 1973-06-22
AU4970472A (en) 1974-06-06
CA971776A (en) 1975-07-29
AU460981B2 (en) 1975-05-15

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee