US661406A - Process of hardening, purifying, and touchening metals. - Google Patents

Process of hardening, purifying, and touchening metals. Download PDF

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Publication number
US661406A
US661406A US69834398A US1898698343A US661406A US 661406 A US661406 A US 661406A US 69834398 A US69834398 A US 69834398A US 1898698343 A US1898698343 A US 1898698343A US 661406 A US661406 A US 661406A
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United States
Prior art keywords
metals
hardening
purifying
touchening
cyanid
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US69834398A
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Charles L Leiby
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LEIBY Co
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LEIBY Co
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C1/00—Refining of pig-iron; Cast iron

Definitions

  • the object of my said invention is to harden [o and toughen metals of a naturally soft, weak, or brittle character and remove impurities therefrom, whereby they are rendered capable of many uses for which steel is ordinarily employed; and it consists in the process of I 5 treating said metals with chemicals or a chemical compound, whereby said object is accomplished, as will be hereinafter more fully described and claimed.
  • the main chemicals employed are potassium nitrate, a cyanid, and silica, (Si02.)
  • potassium nitrate, a cyanid, and silica (Si02.)
  • I have found that good results are secured by using eight grains of potassium nitrate, five grains of a cyanid, and sixty grains of silica in ten pounds of metal. Ordinarily I combine the parts in one package and throw it into the metal when in a molten state; but when they are thrown in in separate packages at the same time or substantially the same time the result is not materially different.
  • silica which I find 0 best adapted for the purpose is finely-powdered flintstone, and this with saltpeter and any cyanid, as potassium cyanid or potassium ferri or ferro cyanid or a mixture, comprises the compound I have ordinarily used. 5
  • Metals so treated including iron, copper, aluminium, and alloys, become harder and tougher and are made capable of the uses stated.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Fats And Perfumes (AREA)

Description

CHARLES L. LEIBY, OF KNOXVILLE, TENNESSEE, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO THE LEIBY COMPANY, OF SAME PLACE.
PROCESS OF HARDENING, PURIFYING, AND TOUGHENING METALS.
SPECIFICATION forming part of Letters Patent No. 661,406, dated November 6, 1900.
Application filed December 5, 1898. Serial No. 698,343. (No specimens.)
To (all whom, it may concern:
Be it known that I, CHARLES L. LEIBY, a citizen of the United States, residing at Knoxville, in the county of Knox and State of Tennessee, have invented certain new and useful Improvements in Processes of Hardening, Purifying, and Toughening Metals, of which the following is a specification.
The object of my said invention is to harden [o and toughen metals of a naturally soft, weak, or brittle character and remove impurities therefrom, whereby they are rendered capable of many uses for which steel is ordinarily employed; and it consists in the process of I 5 treating said metals with chemicals or a chemical compound, whereby said object is accomplished, as will be hereinafter more fully described and claimed.
In using the chemicals they may be combined before introduction or introduced separately, substantially the same results being accomplished by both methods. In speaking of the compound, therefore, it will not necessarily be implied that the chemicals are actually mixed before being introduced into the molten metal; but they are introduced substantially simultaneously when not mixed, nevertheless.
The main chemicals employed are potassium nitrate, a cyanid, and silica, (Si02.) I have found that good results are secured by using eight grains of potassium nitrate, five grains of a cyanid, and sixty grains of silica in ten pounds of metal. Ordinarily I combine the parts in one package and throw it into the metal when in a molten state; but when they are thrown in in separate packages at the same time or substantially the same time the result is not materially different.
The particular kind of silica which I find 0 best adapted for the purpose is finely-powdered flintstone, and this with saltpeter and any cyanid, as potassium cyanid or potassium ferri or ferro cyanid or a mixture, comprises the compound I have ordinarily used. 5
While the proportions stated have brought good results, it will be understood that they may be varied somewhat and to suit the quantity of metal to be treated, as the above-stated proportionate amount of compound may not be required with larger quantities of metal.
Metals so treated, including iron, copper, aluminium, and alloys, become harder and tougher and are made capable of the uses stated.
Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is-
The process of hardening, purifying and toughening metals, which consists in reduc- 6o ing said metals to a molten state and introduc ing therein potassium nitrate, a cyanid and powdered silica, substantially as set forth.
In witness whereof I have hereunto set my hand and seal at Washington, District of Co lumbia, this 3d day of December, A. D. 1898.
CHARLES L. LEIBY. [L. s.]
Witnesses:
CHARLES T. GATES, Jr., E. W. BRADFORD.
US69834398A 1898-12-05 1898-12-05 Process of hardening, purifying, and touchening metals. Expired - Lifetime US661406A (en)

Priority Applications (1)

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US69834398A US661406A (en) 1898-12-05 1898-12-05 Process of hardening, purifying, and touchening metals.

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2541521A (en) * 1945-11-14 1951-02-13 Chromium Mining & Smelting Cor Treatment of cast iron

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2541521A (en) * 1945-11-14 1951-02-13 Chromium Mining & Smelting Cor Treatment of cast iron

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