US1282467A - Process of producing and finishing gears and other carbonized-steel parts. - Google Patents

Process of producing and finishing gears and other carbonized-steel parts. Download PDF

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Publication number
US1282467A
US1282467A US20597617A US20597617A US1282467A US 1282467 A US1282467 A US 1282467A US 20597617 A US20597617 A US 20597617A US 20597617 A US20597617 A US 20597617A US 1282467 A US1282467 A US 1282467A
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United States
Prior art keywords
producing
carbonized
steel parts
parts
finishing gears
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Expired - Lifetime
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US20597617A
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James F Sallows
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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
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
    • C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
    • C—CHEMISTRY; METALLURGY
    • C23—COATING 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
    • C23C—COATING 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
    • C23C8/00—Solid 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
    • C23C8/02—Pretreatment of the material to be coated
    • 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
    • Y10S76/00—Metal tools and implements, making
    • Y10S76/02—Case hardening

Definitions

  • the purpose of this invention is to pro ride an improved process for producing lnu'dcned steel or carbonized iron parts, such as gears and the like, for avoiding deformation in the process of hardening. It consists in the several steps hereinafter de-' scribed, as set out in the claim.
  • I first produce by forging the article desired in the. rough, or of approximately the form and dimension required. I next rough-n'1achine the part to astill closer approximation to the form and dimension requirecl'.
  • I case-harden the part, employing the usual means and processes for carbonizing -it quite deeply, and upon the conclusion of the carbonizing step, I quench the parts in oil first allowing them to cool in the pots to proper tem- Specification 0; Letters Patent. at nt t, 2,1 application llled Ileceinber 7, 1917. Serial No. 205,978.
  • the next step consists in finish-machining the part to final form.
  • I then repacli in carbon in a box, and reheat to a temperature of 1200 to 1400 degrees F., and remove from the packing and quench the article in oil or wateraceording to the grade of steel required.
  • the ,parts produced in this manner are found to have the form and dimensions to which they are finish-machined, without warping or distortion ofany sort, and ap-.
  • the process of producing steelor carbonized irbn parts comprising the following steps: first, rough-forming the parts; second, rough-nmchining parts approximately to the form and outline required; third, carbonizing deeply by case hardening process, and quenching in oil; fourth, annealing by boxing in moderately insulating material as carbon dust, limiting and allowing to cool normally in the atmosphere without unboxing; fifth, finish-machining; sixth, re-boxing-in moderate insulation,re-heating and quenching in oil or water according to the grade of steel required.

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

Description

UNITED STATES" PATENT OFFICE- James F. SALLOWS, or xannrmzoo, mrcnmnn.
rnoorss or rnonuomo mp, rxmsnme GEARS 4m) OTHER CARBONiZEb-STEEL PARTS. 1
No Drawing,
' the following is a specification.
The purpose of this invention is to pro ride an improved process for producing lnu'dcned steel or carbonized iron parts, such as gears and the like, for avoiding deformation in the process of hardening. It consists in the several steps hereinafter de-' scribed, as set out in the claim.
Heretofore difficulty has been experlenced in producing SSlJISfKClZOIy steel or carbonized iron parts requiring accuracy of dimen sion and term Without grinding as the final process of finishing to form and for removing scale, because the usual steps of harden ing produce not only internal stresses but also deformation, and too1-finishing cannot heresorted to after the hardening is com plotted, and the deformations can be c0r reeted only by a process which can be no plied to the hardened material, such, forex' ample, as the process of grinding and polishl have overcome this difficulty by the fol lowing process:
I first produce by forging the article desired in the. rough, or of approximately the form and dimension required. I next rough-n'1achine the part to astill closer approximation to the form and dimension requirecl'. For the third step I case-harden the part, employing the usual means and processes for carbonizing -it quite deeply, and upon the conclusion of the carbonizing step, I quench the parts in oil first allowing them to cool in the pots to proper tem- Specification 0; Letters Patent. at nt t, 2,1 application llled Ileceinber 7, 1917. Serial No. 205,978.
peratu're for'hardening by the quenching As the next step, I box the part in carbon dust, that is, inclose it in a box and pack it with carbon dust, and heat the package to proper temperature for annealing, that is to say, about 1400 degrees 1 and permit it to remain in. the heating furnace a proper length of time t produce the desired refined structure of the casing, and then remove the package from the furnace and allow to cool in the atmosphere, or normally, without unboxi ng'.
The next step consists in finish-machining the part to final form.
I then repacli in carbon in a box, and reheat to a temperature of 1200 to 1400 degrees F., and remove from the packing and quench the article in oil or wateraceording to the grade of steel required.
The ,parts produced in this manner are found to have the form and dimensions to which they are finish-machined, without warping or distortion ofany sort, and ap-.
pare'ntly without injurious internal stresses.-
The process of producing steelor carbonized irbn parts comprising the following steps: first, rough-forming the parts; second, rough-nmchining parts approximately to the form and outline required; third, carbonizing deeply by case hardening process, and quenching in oil; fourth, annealing by boxing in moderately insulating material as carbon dust, limiting and allowing to cool normally in the atmosphere without unboxing; fifth, finish-machining; sixth, re-boxing-in moderate insulation,re-heating and quenching in oil or water according to the grade of steel required.
In testimony whereof, -'I have hereunto set my hand at Kalamazoo, Michigan, this 30th day of-November, 1917; V
JAMES FQ-SALLOWS.
US20597617A 1917-12-07 1917-12-07 Process of producing and finishing gears and other carbonized-steel parts. Expired - Lifetime US1282467A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US20597617A US1282467A (en) 1917-12-07 1917-12-07 Process of producing and finishing gears and other carbonized-steel parts.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US20597617A US1282467A (en) 1917-12-07 1917-12-07 Process of producing and finishing gears and other carbonized-steel parts.

Publications (1)

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US1282467A true US1282467A (en) 1918-10-22

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US20597617A Expired - Lifetime US1282467A (en) 1917-12-07 1917-12-07 Process of producing and finishing gears and other carbonized-steel parts.

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4221958C1 (en) * 1992-07-02 1993-11-18 Mannesmann Ag Method for producing a gear element of a pinion shaft

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4221958C1 (en) * 1992-07-02 1993-11-18 Mannesmann Ag Method for producing a gear element of a pinion shaft

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