US121645A - Improvement in compounds for hardening iron and steel - Google Patents

Improvement in compounds for hardening iron and steel Download PDF

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US121645A
US121645A US121645DA US121645A US 121645 A US121645 A US 121645A US 121645D A US121645D A US 121645DA US 121645 A US121645 A US 121645A
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steel
compounds
improvement
iron
hardening iron
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    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/56General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/58Oils
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M1/00Liquid compositions essentially based on mineral lubricating oils or fatty oils; Their use as lubricants
    • C10M1/08Liquid compositions essentially based on mineral lubricating oils or fatty oils; Their use as lubricants with additives

Definitions

  • This invention relates to a new and useful improvement in a liquid composition for hardening iron and steel, as farming implements, plows, cultivator-teeth, edge-tools, 850.; and it consists in the use of a compound formed of the ingredients hereinafter named, and applied as described.
  • the iron to be hardened-mold-boards, plowpoints, cultivator-teeth, &c. is smoothed off by grinding in the usual manner, and then heated to a temperature a little above a cherry-red color, and then immersed in the compound and allowed to remain until nearly cooled. Then the articles are removed and quickly plunged into cold brine--salt and Waterwhen they are ready for use.
  • the mold-boards or other articles of iron are treated in this manner they are not liable to spring, and are thoroughly hardened, so that their durability is greatly increased.
  • Edge-tools and other articles of steel maybe hardened in a similar manner, but the process may be varied according to the temper required.

Description

UNITED STATES PATENT OFFICE.
' JOHN MCDONALD, OF KANKAKEE, ILLINOIS.
Specification forming part of Letters Patent No. 121,645, dated December 5, 1871.
To all whom it may concern:
Be it known that I, JOHN MCDONALD, of Kankakee, in the county of Kankakee and State of Illinois, have invented certain Improvements in Chemical Compound for Hardening Iron and Steel; and I do hereby declare that the following is a full, clear, and exact description of the same.
This invention relates to a new and useful improvement in a liquid composition for hardening iron and steel, as farming implements, plows, cultivator-teeth, edge-tools, 850.; and it consists in the use of a compound formed of the ingredients hereinafter named, and applied as described.
In carrying out my invention and discovery I form a compound of the following articles, and in about the proportions named, viz.: ten gallons Whale or seal-oil; three and one-half pounds gum ara-bic; three and one-half pounds common salt; three and one-half pounds prussiate of potash; three pounds sulphate of zinc; and five pounds saltpeter.
The iron to be hardened-mold-boards, plowpoints, cultivator-teeth, &c.is smoothed off by grinding in the usual manner, and then heated to a temperature a little above a cherry-red color, and then immersed in the compound and allowed to remain until nearly cooled. Then the articles are removed and quickly plunged into cold brine--salt and Waterwhen they are ready for use. When the mold-boards or other articles of iron are treated in this manner they are not liable to spring, and are thoroughly hardened, so that their durability is greatly increased. Edge-tools and other articles of steel maybe hardened in a similar manner, but the process may be varied according to the temper required.
Having thus described my invention I claim as new and desire to secure by Letters Patent- The above compound, as and for the purposes described.
JOHN MCDONALD.
Witnesses:
J AMES H. PADDOCK, Gems. P. SWIGERT.
US121645D Improvement in compounds for hardening iron and steel Expired - Lifetime US121645A (en)

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US121645A true US121645A (en) 1871-12-05

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040145895A1 (en) * 2003-01-27 2004-07-29 3M Innovative Properties Company Phosphor based light sources having a non-planar long pass reflector and method of making

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040145895A1 (en) * 2003-01-27 2004-07-29 3M Innovative Properties Company Phosphor based light sources having a non-planar long pass reflector and method of making

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