JPS56133457A - Gas soft nitriding method for gear shift fork - Google Patents

Gas soft nitriding method for gear shift fork

Info

Publication number
JPS56133457A
JPS56133457A JP3655780A JP3655780A JPS56133457A JP S56133457 A JPS56133457 A JP S56133457A JP 3655780 A JP3655780 A JP 3655780A JP 3655780 A JP3655780 A JP 3655780A JP S56133457 A JPS56133457 A JP S56133457A
Authority
JP
Japan
Prior art keywords
shift fork
gear shift
fork
posture
gaseous
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
JP3655780A
Other languages
Japanese (ja)
Other versions
JPH0114310B2 (en
Inventor
Munetani Takagi
Shinobu Sasaki
Minoru Kawasaki
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.)
Toyota Motor Corp
Original Assignee
Toyota 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 Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP3655780A priority Critical patent/JPS56133457A/en
Publication of JPS56133457A publication Critical patent/JPS56133457A/en
Publication of JPH0114310B2 publication Critical patent/JPH0114310B2/ja
Granted 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
    • C23C8/06—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
    • C23C8/24—Nitriding
    • C23C8/26—Nitriding of ferrous surfaces
    • 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

Abstract

PURPOSE:To prevent generation of a thermal strain in gas soft nitriding by holding a gear shift fork symmetrically on the front, back, right and left as far as possible with their two arm part ends in a downward posture and heating the same in the gaseous atmosphere. CONSTITUTION:A gear shift fork 1 is held afloat in the air in the posture where the ends of jaw parts 2, 3 face the gravity direction, by placing supporting bars 8, 9, 10 across the sliding surfaces of arm parts 6, 7 with a coupling sleeve in such a manner that said fork is symmetrical on the right and left as far as possible with respect to fork shaft holes 4, 5. In this posture, the shift fork is put into a mixed gaseous atmosphere consisting of a gaseous ammonia and a gaseous nitrogen, where it is heat-treated for a prescribed time in a 500-650 deg.C temp. range, thence it is slow-cooled. The good shift fork of improved initial fittness and abrasion resistance is obtained by this treatment method. Also, the strain produced at the heat treatment is kept low and dimensional accuracy is improved.
JP3655780A 1980-03-22 1980-03-22 Gas soft nitriding method for gear shift fork Granted JPS56133457A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3655780A JPS56133457A (en) 1980-03-22 1980-03-22 Gas soft nitriding method for gear shift fork

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3655780A JPS56133457A (en) 1980-03-22 1980-03-22 Gas soft nitriding method for gear shift fork

Publications (2)

Publication Number Publication Date
JPS56133457A true JPS56133457A (en) 1981-10-19
JPH0114310B2 JPH0114310B2 (en) 1989-03-10

Family

ID=12473050

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3655780A Granted JPS56133457A (en) 1980-03-22 1980-03-22 Gas soft nitriding method for gear shift fork

Country Status (1)

Country Link
JP (1) JPS56133457A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58189369A (en) * 1981-12-16 1983-11-05 エ−イ−・ピ−エルシ− Metal ring and manufacture
JPS60155666A (en) * 1983-09-06 1985-08-15 エ−イ−・ピ−エルシ− Manufacture of soft steel cylinder liner for internal combustion engine
JPH02156064A (en) * 1988-12-08 1990-06-15 Isuzu Motors Ltd Gaseous nitrogen base soft nitriding method
US6367346B1 (en) * 1997-12-22 2002-04-09 Ina Walzlager Schaeffler Ohg Shift fork for an automotive gearbox
CN108149244A (en) * 2017-12-26 2018-06-12 高飞 A kind of high-performance shifting fork device and its surface treatment method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021059489A1 (en) * 2019-09-27 2021-04-01 株式会社ニコン Information processing device, information processing method, information processing program, and information processing system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58189369A (en) * 1981-12-16 1983-11-05 エ−イ−・ピ−エルシ− Metal ring and manufacture
JPS60155666A (en) * 1983-09-06 1985-08-15 エ−イ−・ピ−エルシ− Manufacture of soft steel cylinder liner for internal combustion engine
JPH02156064A (en) * 1988-12-08 1990-06-15 Isuzu Motors Ltd Gaseous nitrogen base soft nitriding method
US6367346B1 (en) * 1997-12-22 2002-04-09 Ina Walzlager Schaeffler Ohg Shift fork for an automotive gearbox
CN108149244A (en) * 2017-12-26 2018-06-12 高飞 A kind of high-performance shifting fork device and its surface treatment method

Also Published As

Publication number Publication date
JPH0114310B2 (en) 1989-03-10

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