JPS57171618A - Hardening method by laser - Google Patents

Hardening method by laser

Info

Publication number
JPS57171618A
JPS57171618A JP5758281A JP5758281A JPS57171618A JP S57171618 A JPS57171618 A JP S57171618A JP 5758281 A JP5758281 A JP 5758281A JP 5758281 A JP5758281 A JP 5758281A JP S57171618 A JPS57171618 A JP S57171618A
Authority
JP
Japan
Prior art keywords
shaft
hardening
laser
hardened
uniformly
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
JP5758281A
Other languages
Japanese (ja)
Other versions
JPS6154085B2 (en
Inventor
Takashi Omae
Yasuyuki Yoshida
Tsunetaka Hiromi
Satoshi Suzuki
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP5758281A priority Critical patent/JPS57171618A/en
Publication of JPS57171618A publication Critical patent/JPS57171618A/en
Publication of JPS6154085B2 publication Critical patent/JPS6154085B2/ja
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

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)
  • Heat Treatment Of Articles (AREA)

Abstract

PURPOSE:To form a uniformly hardened part having no softened areas in the stage of heating and hardening a shaft or the like by laser by increasing the speed of revolving the shaft or the like and heating the entire part of the hardening part then cooling the same. CONSTITUTION:In the stage of hardening a shaft or the like 11 by irradiating a laser beam 15, an oxidative gas such as oxygen, air or carbon dioxide is ejected through a nozzle 14 and the hardening part is heated with the laser deviated from focus, whereby an oxide film 13 is formed over the entire surface of said part. Next, the number of revolutions of the shaft 11 is increased and while the absorption rate of the laser is increased by the film 13, the hardening part 12 of the shaft 11 is heated uniformly over the entire circumference to the transformation point temp. or above. The irradiation of the laser is ceased, and if necessary, gaseous nitrogen or the like is blown through the nozzle to cool the hardneing part quickly, whereby it is hardened. The generation of softened areas by annealing of the initial hardened part by the heat generated during hardening of the final hardening part on account of slow revolution of the shaft is obviated and the shaft is hardened uniformly.
JP5758281A 1981-04-16 1981-04-16 Hardening method by laser Granted JPS57171618A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5758281A JPS57171618A (en) 1981-04-16 1981-04-16 Hardening method by laser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5758281A JPS57171618A (en) 1981-04-16 1981-04-16 Hardening method by laser

Publications (2)

Publication Number Publication Date
JPS57171618A true JPS57171618A (en) 1982-10-22
JPS6154085B2 JPS6154085B2 (en) 1986-11-20

Family

ID=13059841

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5758281A Granted JPS57171618A (en) 1981-04-16 1981-04-16 Hardening method by laser

Country Status (1)

Country Link
JP (1) JPS57171618A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5891117A (en) * 1981-11-26 1983-05-31 Toshiba Corp Heat treating method
JPS60258407A (en) * 1984-05-22 1985-12-20 Honda Motor Co Ltd Hardening method
JPS62109924A (en) * 1985-11-08 1987-05-21 Komatsu Ltd Laser hardening method
JP2016079473A (en) * 2014-10-17 2016-05-16 住友電工焼結合金株式会社 Laser hardening method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5891117A (en) * 1981-11-26 1983-05-31 Toshiba Corp Heat treating method
JPS60258407A (en) * 1984-05-22 1985-12-20 Honda Motor Co Ltd Hardening method
JPS62109924A (en) * 1985-11-08 1987-05-21 Komatsu Ltd Laser hardening method
JP2016079473A (en) * 2014-10-17 2016-05-16 住友電工焼結合金株式会社 Laser hardening method

Also Published As

Publication number Publication date
JPS6154085B2 (en) 1986-11-20

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