US440139A - Process of manufacturing and tempering steel - Google Patents

Process of manufacturing and tempering steel Download PDF

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US440139A
US440139A US440139DA US440139A US 440139 A US440139 A US 440139A US 440139D A US440139D A US 440139DA US 440139 A US440139 A US 440139A
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manufacturing
bath
steel
tempering
chloride
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    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals

Definitions

  • the object of our invention is to obtain a new and cheap tempering-bath and method of carburizing malleable cast-iron and steel which is low in carbon, and thereby convert them into a steel which is high in carbon.
  • We attain this object by making a triple-sat- 11 rated solution in Water of chloride of sodium, chloride of ammonium, and sugar.
  • Sirup, molasses, honey, or any similar saccharine substance is the equivalent of the sugar.
  • Into this bath we place the metal to be carburized, raised to a white heat, and allow it to remain while cooling. The heat of the metal decomposes t-he bath, setting the carbon free, which is absorbed by and chemically unites with the metal.
  • the method of making the bath which we prefer is as follows: First, we make a saturated solution of chloride of sodium and water;
  • This triple-saturated solution is very dense, and possesses valuable properties as a tempering-bath. It is used for tempering in the ordinary manner, the metal, raised to a cherryred or a dull cherry-red heat,being placed in the bath and allowed to remain until the desired temper is obtained.

Description

MARTIN FRANCIS COOMES AND ARUNAH VVATERMAN HYDE, OF LOUIS- VILLE, KENTUCKY.
PROCESS OF MANUFACTURING AND TEMPERING STEEL.
SPECIFICATION forming part of Letters Patent No. 440,139, dated November 11, 1890.
Application filed February 7, 1890. Serial No. 339,589. (No specimens.)
To all whom it may concern.-
Be it known that we, MARTIN FRANCIS OooMEs and ARUNAH WATERMAN HYDE, citizens of the United States, residing at Louisville, in the county of Jefferson and State of Kentucky, have invented certain new and useful Improvements in the Process of Manufacturing Steel; and we do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.
The object of our invention is to obtain a new and cheap tempering-bath and method of carburizing malleable cast-iron and steel which is low in carbon, and thereby convert them into a steel which is high in carbon. We attain this object by making a triple-sat- 11 rated solution in Water of chloride of sodium, chloride of ammonium, and sugar. Sirup, molasses, honey, or any similar saccharine substanceis the equivalent of the sugar. Into this bath we place the metal to be carburized, raised to a white heat, and allow it to remain while cooling. The heat of the metal decomposes t-he bath, setting the carbon free, which is absorbed by and chemically unites with the metal.
The method of making the bath which we prefer is as follows: First, we make a saturated solution of chloride of sodium and water;
second, to said solution we add as much sugar as it will dissolve; and, third, to said double-saturated solution we add chloride of ammonium until it will hold no more. This triple-saturated solution is very dense, and possesses valuable properties as a tempering-bath. It is used for tempering in the ordinary manner, the metal, raised to a cherryred or a dull cherry-red heat,being placed in the bath and allowed to remain until the desired temper is obtained.
Having thus fully described our invention, what we claim, and desire to secure by Letters Patent, is-
1. In the manufacture of steel, the process of carburizing malleable cast-iron and lowcarbon steel, which consist-s in placing the metal raised to a white heatin a bath composed of Water, a sugar, chloride of sodium, and chloride of ammonium, substantially as described.
2. As a tempering and carburizing bath,
US440139D Process of manufacturing and tempering steel Expired - Lifetime US440139A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3537787A1 (en) * 1985-10-24 1987-04-30 Bosch Gmbh Robert VACUUM CONTROL VALVE, ESPECIALLY FOR CONTROLLING AN EXHAUST GAS RECIRCULATION VALVE FOR INTERNAL COMBUSTION ENGINES
US20050043802A1 (en) * 2003-02-12 2005-02-24 Sdgi Holdings, Inc. Articular disc prosthesis for lateral insertion

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3537787A1 (en) * 1985-10-24 1987-04-30 Bosch Gmbh Robert VACUUM CONTROL VALVE, ESPECIALLY FOR CONTROLLING AN EXHAUST GAS RECIRCULATION VALVE FOR INTERNAL COMBUSTION ENGINES
US20050043802A1 (en) * 2003-02-12 2005-02-24 Sdgi Holdings, Inc. Articular disc prosthesis for lateral insertion

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