GB911626A - Improvements in ploughshares - Google Patents

Improvements in ploughshares

Info

Publication number
GB911626A
GB911626A GB274158A GB274158A GB911626A GB 911626 A GB911626 A GB 911626A GB 274158 A GB274158 A GB 274158A GB 274158 A GB274158 A GB 274158A GB 911626 A GB911626 A GB 911626A
Authority
GB
United Kingdom
Prior art keywords
steel
temperature
ploughshare
heat treatment
nickel
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
GB274158A
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.)
Ransomes Sims and Jeffries Ltd
Original Assignee
Ransomes Sims and Jeffries Ltd
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 Ransomes Sims and Jeffries Ltd filed Critical Ransomes Sims and Jeffries Ltd
Priority to GB274158A priority Critical patent/GB911626A/en
Publication of GB911626A publication Critical patent/GB911626A/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

911,626. Making ploughshares. RANSOMES, SIMS & JEFFERIES Ltd., and REVETT, R. H. March 17, 1959 [Jan. 27, 1958], No. 2741/58. Class 83 (2). A method of making a one-piece ploughshare from silicon-manganese steel, nickel steel or nickel-chromium steel (carbon content preferably above 0.5%), or chromium steel comprises forming the steel into the requisite shape, as by bending and forging, thinning the cutting edges and submitting the ploughshare to an isothermal heat treatment. The heat treatment may consist of heating the steel to a temperature above the austenitizing temperature of the material, e.g. 915‹ C., for say 15-30 minutes, and quenching in molten nitrate or lead, or in oil at a temperature above the point at which martensitic transformation commences, e.g. 300‹ C. This temperature is maintained for up to 30 minutes during which the unstable austenite changes to bainite.
GB274158A 1958-01-27 1958-01-27 Improvements in ploughshares Expired GB911626A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB274158A GB911626A (en) 1958-01-27 1958-01-27 Improvements in ploughshares

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB274158A GB911626A (en) 1958-01-27 1958-01-27 Improvements in ploughshares

Publications (1)

Publication Number Publication Date
GB911626A true GB911626A (en) 1962-11-28

Family

ID=9745011

Family Applications (1)

Application Number Title Priority Date Filing Date
GB274158A Expired GB911626A (en) 1958-01-27 1958-01-27 Improvements in ploughshares

Country Status (1)

Country Link
GB (1) GB911626A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0029660A1 (en) * 1979-10-26 1981-06-03 W.A. TYZACK & COMPANY LIMITED Slicing knife and method of making it
WO2000022177A1 (en) * 1998-10-14 2000-04-20 Kverneland Klepp As Heat treatment of wearable working tool
RU2601211C2 (en) * 2015-02-26 2016-10-27 Александр Михайлович Михальченков Stamp-welded ploughshare with increased resistance to abrasive wear

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0029660A1 (en) * 1979-10-26 1981-06-03 W.A. TYZACK & COMPANY LIMITED Slicing knife and method of making it
WO2000022177A1 (en) * 1998-10-14 2000-04-20 Kverneland Klepp As Heat treatment of wearable working tool
RU2601211C2 (en) * 2015-02-26 2016-10-27 Александр Михайлович Михальченков Stamp-welded ploughshare with increased resistance to abrasive wear

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