EP0079864A1 - Procédé de traitement de douille pour patin de chenille des tracteurs ou véhicules chenillés par carburation à température élevée dans une atmosphère carburée produite in situ, par trempe directe, revenu des bouts et recuit de détente - Google Patents

Procédé de traitement de douille pour patin de chenille des tracteurs ou véhicules chenillés par carburation à température élevée dans une atmosphère carburée produite in situ, par trempe directe, revenu des bouts et recuit de détente Download PDF

Info

Publication number
EP0079864A1
EP0079864A1 EP82830210A EP82830210A EP0079864A1 EP 0079864 A1 EP0079864 A1 EP 0079864A1 EP 82830210 A EP82830210 A EP 82830210A EP 82830210 A EP82830210 A EP 82830210A EP 0079864 A1 EP0079864 A1 EP 0079864A1
Authority
EP
European Patent Office
Prior art keywords
carburizing
bushes
temperature
chamber
furnace
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
EP82830210A
Other languages
German (de)
English (en)
Other versions
EP0079864B1 (fr
Inventor
Walter Grilli
Franco De Meo
Ivan Franchini
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.)
Italtractor ITM SpA
Original Assignee
Italtractor ITM SpA
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 Italtractor ITM SpA filed Critical Italtractor ITM SpA
Publication of EP0079864A1 publication Critical patent/EP0079864A1/fr
Application granted granted Critical
Publication of EP0079864B1 publication Critical patent/EP0079864B1/fr
Expired 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
    • 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
    • C21D1/78—Combined heat-treatments not provided for above
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • C21D9/14—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes wear-resistant or pressure-resistant pipes

Definitions

  • This invention refers to the production of bushes for the tracks of tracked vehicles in general, such as tractors and earthmoving machinery, more precisely, the invention refers to a production process in which the bushes are carburized at high temperature in a carburizing atmosphere produced in situ (using techniques which are already known as such but which have never been applied simultaneously to the items in question), and then are individually quenched and finally undergo a tempering of the ends and a total stress relief.
  • the bush rotatably coupled to a pin, forms the articulated junction element between the track links.
  • the present invention provides for the use of techniques that, although actually known, such as high-temperature carburizing with furnace-produced atmosphere and direct quenching, are applied in an original manner to a product such as bushes and incorporated for the first time simultaneously in an optimized treatment cycle.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Heat Treatment Of Articles (AREA)
EP82830210A 1981-10-23 1982-07-21 Procédé de traitement de douille pour patin de chenille des tracteurs ou véhicules chenillés par carburation à température élevée dans une atmosphère carburée produite in situ, par trempe directe, revenu des bouts et recuit de détente Expired EP0079864B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT4955281 1981-10-23
IT49552/81A IT1171606B (it) 1981-10-23 1981-10-23 Procedimento per trattamento termico di cementazione ad alta temperatura con atmosfera cementante prodotta in situ tempra diretta rinvenimento alle estremita' di distensione totale di boccole per catenarie di trattori o mezzi cingolati

Publications (2)

Publication Number Publication Date
EP0079864A1 true EP0079864A1 (fr) 1983-05-25
EP0079864B1 EP0079864B1 (fr) 1987-11-25

Family

ID=11271005

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82830210A Expired EP0079864B1 (fr) 1981-10-23 1982-07-21 Procédé de traitement de douille pour patin de chenille des tracteurs ou véhicules chenillés par carburation à température élevée dans une atmosphère carburée produite in situ, par trempe directe, revenu des bouts et recuit de détente

Country Status (4)

Country Link
EP (1) EP0079864B1 (fr)
BR (1) BR8206000A (fr)
DE (1) DE3277732D1 (fr)
IT (1) IT1171606B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0147845A2 (fr) * 1983-12-27 1985-07-10 Chugai Ro Co., Ltd. Procédé de carburation et de durcissement gazeux et four continu pour la réalisation de ce procédé
EP0375392A2 (fr) * 1988-12-21 1990-06-27 Topy Kogyo Kabushiki Kaisha Procédé de fabrication d'une douille pour patins de chenille des tracteurs
EP0455346A1 (fr) * 1990-03-31 1991-11-06 Topy Kogyo Kabushiki Kaisha Procédé de fabrication de douilles pour patins de chenille de véhicules chenillées
FR2755980A1 (fr) * 1996-11-14 1998-05-22 Girardello Bruno Procede pour le traitement thermique de coussinets, en particulier pour des vehicules chenilles et analogues

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE632935C (de) * 1931-05-16 1936-07-16 Benno Schilde Maschb Akt Ges Verfahren und Einrichtung zur Oberflaechenkohlung von Eisen und Stahl
US3227586A (en) * 1963-08-19 1966-01-04 Caterpillar Tractor Co Track pin bushing
GB1489106A (en) * 1974-03-18 1977-10-19 Hawera Probst Kg Hartmetall Hardening of steel workpieces
US4152177A (en) * 1977-02-03 1979-05-01 General Motors Corporation Method of gas carburizing
DE2710748B2 (de) * 1976-03-11 1981-01-22 Airco, Inc., Montvale, N.J. (V.St.A.) Verfahren zum Aufkohlen von Werkstücken aus Eisen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE632935C (de) * 1931-05-16 1936-07-16 Benno Schilde Maschb Akt Ges Verfahren und Einrichtung zur Oberflaechenkohlung von Eisen und Stahl
US3227586A (en) * 1963-08-19 1966-01-04 Caterpillar Tractor Co Track pin bushing
GB1489106A (en) * 1974-03-18 1977-10-19 Hawera Probst Kg Hartmetall Hardening of steel workpieces
DE2710748B2 (de) * 1976-03-11 1981-01-22 Airco, Inc., Montvale, N.J. (V.St.A.) Verfahren zum Aufkohlen von Werkstücken aus Eisen
US4152177A (en) * 1977-02-03 1979-05-01 General Motors Corporation Method of gas carburizing

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
METAL SCIENCE & HEAT TREATMENT, vol. 21, no. 7, July-August 1979, New York L.B. EFIMOVA et al. "Carburizing of caterpillar track bushings in fluidized bed", pages 609-611 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0147845A2 (fr) * 1983-12-27 1985-07-10 Chugai Ro Co., Ltd. Procédé de carburation et de durcissement gazeux et four continu pour la réalisation de ce procédé
EP0147845A3 (en) * 1983-12-27 1986-03-26 Chugai Ro Kogyo Co., Ltd. Method af gas carburizing and herdening and continuous furnace therefor
EP0375392A2 (fr) * 1988-12-21 1990-06-27 Topy Kogyo Kabushiki Kaisha Procédé de fabrication d'une douille pour patins de chenille des tracteurs
EP0375392A3 (fr) * 1988-12-21 1991-08-21 Topy Kogyo Kabushiki Kaisha Procédé de fabrication d'une douille pour patins de chenille des tracteurs
EP0455346A1 (fr) * 1990-03-31 1991-11-06 Topy Kogyo Kabushiki Kaisha Procédé de fabrication de douilles pour patins de chenille de véhicules chenillées
FR2755980A1 (fr) * 1996-11-14 1998-05-22 Girardello Bruno Procede pour le traitement thermique de coussinets, en particulier pour des vehicules chenilles et analogues
US6193820B1 (en) 1996-11-14 2001-02-27 Bruno Girardello Method for the thermal treatment of bushings, particularly for tracked vehicles and the like

Also Published As

Publication number Publication date
BR8206000A (pt) 1983-09-13
EP0079864B1 (fr) 1987-11-25
DE3277732D1 (en) 1988-01-07
IT1171606B (it) 1987-06-10
IT8149552A0 (it) 1981-10-23

Similar Documents

Publication Publication Date Title
CN108277449B (zh) 一种对低碳合金钢工件进行渗碳淬火的热处理方法
KR910003515B1 (ko) 강부품의표면경화방법
US4222793A (en) High stress nodular iron gears and method of making same
CN103132086A (zh) 一种重载齿轮渗碳－等温－淬火新工艺
CN111719111A (zh) 一种提高齿轮渗碳用钢综合性能的热处理方法
CN112593183A (zh) 一种渗碳淬火的热处理方法
GB2214196A (en) Case-hardening
US3944444A (en) Method for heat treating cylindrical products
US4495004A (en) Process for high-temperature carburizing treatment of track bushes for tractors or tracked vehicles
EP0079864B1 (fr) Procédé de traitement de douille pour patin de chenille des tracteurs ou véhicules chenillés par carburation à température élevée dans une atmosphère carburée produite in situ, par trempe directe, revenu des bouts et recuit de détente
US4419152A (en) Process for direct heat treatment of track links for tractors or tracked vehicles
CN106011425A (zh) 一种低合金耐热钢紧固件的调质处理工艺
KR940011706B1 (ko) 침탄열처리로에서의 일괄 작업이 가능한 링기어의 열처리용 지그 및 이에 의한 열처리 방법
KR101738503B1 (ko) 냉간가공 제품 변형 저감 열처리 방법
CN109321868A (zh) 一种高耐磨圆环链的热处理工艺
US10287648B2 (en) Track bushing
CN112708734A (zh) 一种具有提高耐磨性的热处理工艺
US3567527A (en) Metallurgical process and product
JP6922759B2 (ja) 鋼部材の製造方法
CN106148881B (zh) 用于线性滑轨的渗碳沃斯回火滑块及其制造方法
JP4654190B2 (ja) 耐摩耗性を改良されたジョイント部材及びそのジョイント部材を製造するための方法
CN110257601A (zh) 高速钢材二次超软球化退火方法
JPH02294462A (ja) 鋼部材の浸炭焼入方法
JP2998168B2 (ja) 高温軟窒化炉及び軟窒化方法
JPS6318018A (ja) 連続浸炭方法および装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB

17P Request for examination filed

Effective date: 19830704

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ITALTRACTOR MECCANICA ITM S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REF Corresponds to:

Ref document number: 3277732

Country of ref document: DE

Date of ref document: 19880107

ET Fr: translation filed
RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: ITALTRACTOR ITM S.P.A.

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19900713

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19900727

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19900831

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19910721

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19920331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19920401

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST