GB1329984A - Process for making cutting instruments - Google Patents

Process for making cutting instruments

Info

Publication number
GB1329984A
GB1329984A GB5633870A GB5633870A GB1329984A GB 1329984 A GB1329984 A GB 1329984A GB 5633870 A GB5633870 A GB 5633870A GB 5633870 A GB5633870 A GB 5633870A GB 1329984 A GB1329984 A GB 1329984A
Authority
GB
United Kingdom
Prior art keywords
blades
steel
cutting instruments
making
quenching
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
GB5633870A
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.)
Gillette Co LLC
Original Assignee
Gillette Co LLC
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 Gillette Co LLC filed Critical Gillette Co LLC
Publication of GB1329984A publication Critical patent/GB1329984A/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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/18—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for knives, scythes, scissors, or like hand cutting tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
    • B26B21/54—Razor-blades
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S148/00—Metal treatment
    • Y10S148/902—Metal treatment having portions of differing metallurgical properties or characteristics
    • Y10S148/905—Cutting tool

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Heat Treatment Of Steel (AREA)
  • Nonmetal Cutting Devices (AREA)

Abstract

1329984 Making cutting instruments GILLETTE CO 26 Nov 1970 [3 Dec 1969] 56338/70 Heading B3A [Also in Division C7] A method of making cutting instruments from martensitic stainless or semi-stainless steel comprises heating and quenching the steel to provide a retained austenite content of 35-95% and thereafter hardening at least the cutting edge areas by cold-working until the retained austenite content in those areas is less than 30%, the martensitic steel comprising 6-18% chromium and 0À4-1À25% carbon. The steel is in thin strip form for making razor blades or ribbon-like blades for reel type razors. It is heated to substantially beyond the A 3 point and held there for a sufficient time to depress the M s point to room temperature or below. After quenching, the strip edges are ground and honed and then the strip is severed into individual blades. The blades are degreased and sprayed with a dispersion of P.T.F.E. which is sintered under a protective atmosphere.
GB5633870A 1969-12-03 1970-11-26 Process for making cutting instruments Expired GB1329984A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US88234569A 1969-12-03 1969-12-03

Publications (1)

Publication Number Publication Date
GB1329984A true GB1329984A (en) 1973-09-12

Family

ID=25380394

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5633870A Expired GB1329984A (en) 1969-12-03 1970-11-26 Process for making cutting instruments

Country Status (7)

Country Link
US (1) US3723195A (en)
CA (1) CA930290A (en)
ES (1) ES386098A1 (en)
FR (1) FR2072868A5 (en)
GB (1) GB1329984A (en)
NL (1) NL7017639A (en)
SE (1) SE368422B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2258469A (en) * 1991-08-05 1993-02-10 Hitachi Metals Ltd Stainless steel for a razor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2035374A (en) * 1978-10-19 1980-06-18 Wilkinson Sword Ltd Steel alloy
US5666732A (en) * 1994-09-28 1997-09-16 Shea; Thomas M. Holder for use with a razor blade

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2258469A (en) * 1991-08-05 1993-02-10 Hitachi Metals Ltd Stainless steel for a razor
GB2258469B (en) * 1991-08-05 1994-10-05 Hitachi Metals Ltd Stainless steel for a razor

Also Published As

Publication number Publication date
SE368422B (en) 1974-07-01
NL7017639A (en) 1971-06-07
FR2072868A5 (en) 1971-09-24
ES386098A1 (en) 1973-03-16
CA930290A (en) 1973-07-17
US3723195A (en) 1973-03-27

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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