FR2183590A1 - Steel surface hardening - with current short pulse inductor - Google Patents

Steel surface hardening - with current short pulse inductor

Info

Publication number
FR2183590A1
FR2183590A1 FR7216935A FR7216935A FR2183590A1 FR 2183590 A1 FR2183590 A1 FR 2183590A1 FR 7216935 A FR7216935 A FR 7216935A FR 7216935 A FR7216935 A FR 7216935A FR 2183590 A1 FR2183590 A1 FR 2183590A1
Authority
FR
France
Prior art keywords
pref
fed
duration
cavity resonator
valve
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.)
Granted
Application number
FR7216935A
Other languages
French (fr)
Other versions
FR2183590B1 (en
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.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to FR7216935A priority Critical patent/FR2183590A1/en
Publication of FR2183590A1 publication Critical patent/FR2183590A1/en
Application granted granted Critical
Publication of FR2183590B1 publication Critical patent/FR2183590B1/fr
Granted legal-status Critical Current

Links

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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/06—Surface hardening
    • C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
    • C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Induction Heating (AREA)

Abstract

The 0.1 sec. duration extremely steep rear flank induction heating energy pulses for extremely fine grain surface harding layers on steel as in parent patent are produced by a high frequency generator with an operating frequency of pref. 27.12 MGz with a tuned circuit with a circuit Q above 100, which is pref. a large volume cavity resonator, which is fed by an oscillator valve with a comparatively small internal resistance, pref. 1000 ohms. This valve is fed with pulses having steep ascent and spontaneous descent characteristics, the duration for the latter being pref. shorter than 1% of the total effective pulse duration. The coil employed comprises a low ohm inductive coupling loop inductor, which is fed into the interior of the high quality cavity resonator(s). The method is fast and imparts very high surface hardness.
FR7216935A 1972-05-12 1972-05-12 Steel surface hardening - with current short pulse inductor Granted FR2183590A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7216935A FR2183590A1 (en) 1972-05-12 1972-05-12 Steel surface hardening - with current short pulse inductor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7216935A FR2183590A1 (en) 1972-05-12 1972-05-12 Steel surface hardening - with current short pulse inductor

Publications (2)

Publication Number Publication Date
FR2183590A1 true FR2183590A1 (en) 1973-12-21
FR2183590B1 FR2183590B1 (en) 1974-07-26

Family

ID=9098385

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7216935A Granted FR2183590A1 (en) 1972-05-12 1972-05-12 Steel surface hardening - with current short pulse inductor

Country Status (1)

Country Link
FR (1) FR2183590A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1957884A1 (en) * 1969-11-18 1971-04-15

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1957884A1 (en) * 1969-11-18 1971-04-15

Also Published As

Publication number Publication date
FR2183590B1 (en) 1974-07-26

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse