JPS5625962A - Two-stepped hardening method for steel - Google Patents

Two-stepped hardening method for steel

Info

Publication number
JPS5625962A
JPS5625962A JP10059879A JP10059879A JPS5625962A JP S5625962 A JPS5625962 A JP S5625962A JP 10059879 A JP10059879 A JP 10059879A JP 10059879 A JP10059879 A JP 10059879A JP S5625962 A JPS5625962 A JP S5625962A
Authority
JP
Japan
Prior art keywords
steel material
temp
hardness
hardening
steel
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.)
Pending
Application number
JP10059879A
Other languages
Japanese (ja)
Inventor
Yoshihiko Oishi
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.)
Suzuki Motor Corp
Original Assignee
Suzuki Motor Corp
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 Suzuki Motor Corp filed Critical Suzuki Motor Corp
Priority to JP10059879A priority Critical patent/JPS5625962A/en
Publication of JPS5625962A publication Critical patent/JPS5625962A/en
Pending legal-status Critical Current

Links

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
    • C23C8/80—After-treatment

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

PURPOSE:To remove austenite in carburized surface layer of steel material, by performing induction hardening or flame hardening of the steel material after it has been subjected to carburizing hardening and tempering according to prescribed specification. CONSTITUTION:Steel for carburization is subjected to carburizing hardening and tempering to 0.5-0.8mm. carburizing depth and HRC60+ or -3 hardness, then it is induction hardened in order to remove residual austenite. For example, steel material is gas carburized in C3H8 atmosphere gas at 910-920 deg.C carburising temp. for 2hr 15min-2hr 30min, and is kept at 850-860 deg.C temp. for 15min. Subsequently it is dip quenched with quenching oil at 70-170 deg.C temp., and heated at 170-180 deg.C temp. for 2hr, and is tempered by air cooling. Hereby the steel material attains HRC 58-60 hardness and 0.6-0.7mm. effective carburized depth. In addition, the steel material is induction hardened for 5-15sec quenching time by a high frequency generator of 40kW capacity and 10-30kc frequency, then it is cooled with water mixed with 10-30% preventing agent for quenching crack. Hereby its hardness is increased by HRC4-5 hardness, and the austenite in the surface layer is transformed to martensite.
JP10059879A 1979-08-07 1979-08-07 Two-stepped hardening method for steel Pending JPS5625962A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10059879A JPS5625962A (en) 1979-08-07 1979-08-07 Two-stepped hardening method for steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10059879A JPS5625962A (en) 1979-08-07 1979-08-07 Two-stepped hardening method for steel

Publications (1)

Publication Number Publication Date
JPS5625962A true JPS5625962A (en) 1981-03-12

Family

ID=14278294

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10059879A Pending JPS5625962A (en) 1979-08-07 1979-08-07 Two-stepped hardening method for steel

Country Status (1)

Country Link
JP (1) JPS5625962A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57152416A (en) * 1981-03-17 1982-09-20 Toyota Motor Corp Contour hardening method for low carbon steel member having rugged parts
JPS59193211A (en) * 1983-04-15 1984-11-01 Toyota Motor Corp High frequency hardening method of carburized part
JPS63201583A (en) * 1987-02-18 1988-08-19 Toshiba Corp Automatic gain control circuit
JPH0342515A (en) * 1989-07-10 1991-02-22 Mitsubishi Electric Corp Heat-resisting magnetic scale and its manufacture
KR100727754B1 (en) 2006-03-14 2007-06-13 김봉수 A punch material heat treatment method of a stamping die
CN112746149A (en) * 2020-12-28 2021-05-04 中国航发哈尔滨轴承有限公司 High-temperature tempering process for reducing surface hardness of carburized ferrule

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57152416A (en) * 1981-03-17 1982-09-20 Toyota Motor Corp Contour hardening method for low carbon steel member having rugged parts
JPS59193211A (en) * 1983-04-15 1984-11-01 Toyota Motor Corp High frequency hardening method of carburized part
JPS63201583A (en) * 1987-02-18 1988-08-19 Toshiba Corp Automatic gain control circuit
JPH0342515A (en) * 1989-07-10 1991-02-22 Mitsubishi Electric Corp Heat-resisting magnetic scale and its manufacture
KR100727754B1 (en) 2006-03-14 2007-06-13 김봉수 A punch material heat treatment method of a stamping die
CN112746149A (en) * 2020-12-28 2021-05-04 中国航发哈尔滨轴承有限公司 High-temperature tempering process for reducing surface hardness of carburized ferrule

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