US974835A - Process of case-hardening tantalum. - Google Patents

Process of case-hardening tantalum. Download PDF

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Publication number
US974835A
US974835A US57858110A US1910578581A US974835A US 974835 A US974835 A US 974835A US 57858110 A US57858110 A US 57858110A US 1910578581 A US1910578581 A US 1910578581A US 974835 A US974835 A US 974835A
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US
United States
Prior art keywords
tantalum
hardening
case
treating
hardening agent
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 - Lifetime
Application number
US57858110A
Inventor
Otto Archibald Simpson
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.)
Siemens and Halske AG
Siemens Corp
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Siemens Corp
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Publication date
Application filed by Siemens Corp filed Critical Siemens Corp
Priority to US57858110A priority Critical patent/US974835A/en
Application granted granted Critical
Publication of US974835A publication Critical patent/US974835A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • C23C8/06—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 using gases
    • C23C8/08—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 using gases only one element being applied
    • C23C8/10—Oxidising
    • 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
    • Y10S76/11—Tungsten and tungsten carbide

Definitions

  • the subject-matter of my invention is a process of case-hardening articles composed of tantalum.
  • I treat the surfaces of such articles with a hardening agent, 0. g. oxygen, which is made operative either electrolytically or by heating in. the air;
  • a hardening agent 0. g. oxygen
  • oxygen or other hardening agents an exceedingly hard surface layer can be obtained.
  • this layer may penetrate deeper into the body than would be the case otherwise and simultaneously to enlarge the surface itself and with it the area on which the hardening agent can act, I roughen the surface, e. g. by means of a sand blast, before it is treated with the hardening agent.
  • I may treat the roughened hardened surface in addition with presses or rollers. If unhardened parts of the lower layer become exposed durmg tlns treatment the surface may be hardened afresh when a materially improved result can be obtained.
  • the surface can. simulta neously be given the nature adapted for its later use; for example, by treating it with rough matrices or rollers bodies can be ob tained which mav serve as substitutes for Specification of Letters Patent.
  • diamond or emery disks or be used in the manner of files or the like.
  • a fraction of :1 millimeter in thickness can be made, for example, which have a rough, very hard surface and can be employed, for example, as separating disks for dental purposes.
  • I claim 1 The hereindescribed process of casehardening a body composed of tantalum, which comprises the steps of roughening the surface of the body and subsequently treating it with a hardening agent.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Dental Prosthetics (AREA)
  • Physical Vapour Deposition (AREA)
  • Nonmetallic Welding Materials (AREA)

Description

" TED STATES PATENT FFIC.
OTTO ABGHIBALD SIIVEPSON, OF CHARLOTTENBURG, GERMANY, ASSIGN'OR T0 SIEMENS & HALSKE A. G., 0]? BERLIN, GERMANY, A CORPORATION OF GERMANY.
PROCESS OF CASE-HARDENING TANTALUM.
No Drawing.
To all whom it may concern:
Be it known that I, O'rTo Anni-Imam SIMPSON, a subject of the German Emperor, and residing at Cha-rlottenburg, near Berlm, Germany, have invented a certain new and useful Improved Process of Case-Hardening Tantalum, of which the following 18 a specification.
The subject-matter of my invention is a process of case-hardening articles composed of tantalum.
According to my invention I treat the surfaces of such articles with a hardening agent, 0. g. oxygen, which is made operative either electrolytically or by heating in. the air; By treating such articles with oxygen or other hardening agents an exceedingly hard surface layer can be obtained. In order that this layer may penetrate deeper into the body than would be the case otherwise and simultaneously to enlarge the surface itself and with it the area on which the hardening agent can act, I roughen the surface, e. g. by means of a sand blast, before it is treated with the hardening agent. In
order then to make this hard surface resting on a softer, more ductile basis of tantalum cohere better and to work the hard mass rather more into the upper layers of the soft material, I may treat the roughened hardened surface in addition with presses or rollers. If unhardened parts of the lower layer become exposed durmg tlns treatment the surface may be hardened afresh when a materially improved result can be obtained.
By treating the hardened surface with presses or rollers the surface can. simulta neously be given the nature adapted for its later use; for example, by treating it with rough matrices or rollers bodies can be ob tained which mav serve as substitutes for Specification of Letters Patent.
Patented Nov. 8, 1910.
Application filed August 23, 1910. Serial No. 578,581.
diamond or emery disks or be used in the manner of files or the like. In this manner exceedingly thin disks, a fraction of :1 millimeter in thickness, can be made, for example, which have a rough, very hard surface and can be employed, for example, as separating disks for dental purposes.
I claim 1. The hereindescribed process of casehardening a body composed of tantalum, which comprises the steps of roughening the surface of the body and subsequently treating it with a hardening agent.
2. The hereindescribcd process of caschardening a body composed of tantalum. which comprises the steps of roughening the surface of the body and subsequently oxidizing the roughened surface.
The hereim'lescribed process of casehardening a bodv composed of tantalum, which comprises the steps of roughening the surface of the body, treating the roughened surface with a hardening agent and subjectingthe roughened hardened surface to pressure.
4. The hereindescribed process of casehardening a body composed of tantalum. which comprises the. steps of roughening the surface of the body, treating the roughened surface with a hardening agent, pressing the roughened hardened surface and subsequently again treating the surface with a hardening agent.
In testimony whereof I have signed mv name to this specification in the presence of two witnesses.
OTTO ARCHIBALD SIMPSON.
US57858110A 1910-08-23 1910-08-23 Process of case-hardening tantalum. Expired - Lifetime US974835A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US57858110A US974835A (en) 1910-08-23 1910-08-23 Process of case-hardening tantalum.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US57858110A US974835A (en) 1910-08-23 1910-08-23 Process of case-hardening tantalum.

Publications (1)

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US974835A true US974835A (en) 1910-11-08

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Country Status (1)

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