WO2019223078A1 - Procédé de trempe de nitrocarburation de gaz à température moyenne - Google Patents

Procédé de trempe de nitrocarburation de gaz à température moyenne Download PDF

Info

Publication number
WO2019223078A1
WO2019223078A1 PCT/CN2018/095301 CN2018095301W WO2019223078A1 WO 2019223078 A1 WO2019223078 A1 WO 2019223078A1 CN 2018095301 W CN2018095301 W CN 2018095301W WO 2019223078 A1 WO2019223078 A1 WO 2019223078A1
Authority
WO
WIPO (PCT)
Prior art keywords
nitriding
carburizing
argon
layer
furnace
Prior art date
Application number
PCT/CN2018/095301
Other languages
English (en)
Chinese (zh)
Inventor
殷文元
钱祥鑫
Original Assignee
江苏万力机械股份有限公司
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 江苏万力机械股份有限公司 filed Critical 江苏万力机械股份有限公司
Publication of WO2019223078A1 publication Critical patent/WO2019223078A1/fr

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
    • C23C8/28—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 more than one element being applied in one step
    • C23C8/30—Carbo-nitriding
    • C23C8/32—Carbo-nitriding of ferrous surfaces
    • 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
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • C21D9/30—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for crankshafts; for camshafts

Definitions

  • the invention relates to the technical field of metal surface treatment, in particular to a medium temperature gas nitrocarburizing quenching process.
  • Austempered Ductile Iron also referred to as Austempered Ductile Iron (ADI), also known as Austempered Ductile Iron
  • ADI Austempered Ductile Iron
  • austenite isothermal quenching technology a high-strength, high-toughness isothermally quenched ductile iron with a tensile strength greater than 1000 MPa and an elongation greater than 15% was developed.
  • Isothermally quenched ductile iron also has the characteristics of high strength and high toughness. Its comprehensive mechanical properties are significantly better than ferritic ductile iron and pearlite ductile iron.
  • Isothermally quenched ductile iron is an important progress in strengthening and toughening ductile iron. It is hailed as one of the major achievements in the metallurgy of cast iron in the past 30 years and is expected to replace expensive cast steel and forged workpieces.
  • the infiltration layer has high impact toughness and good wear resistance, and the maximum hardness of the infiltration layer is 800HV.
  • the main problems with this document technology are: (1) the use of NH3 + methanol, NH3 and methanol interaction results in the formation of hydrocyanic acid (HCN), which will pollute the environment; (2) no isogroup or aging treatment is performed after the infiltration.
  • the purpose of the present invention is to provide a middle temperature gas nitrocarburizing quenching process in view of the shortcomings of the prior art.
  • a medium-temperature gas nitrocarburizing quenching process the formed crankshaft is put into a fluidized bed particle furnace and heated to 600-800 ° C to perform austenitization; argon gas is passed into the furnace, and argon gas is passed through the furnace.
  • carburizing treatment is performed to form a carburizing layer, and the carburizing time is 20 to 160 minutes; argon is continued, and under the protection of argon, austenitic stainless steel workpieces are subjected to nitriding treatment to form Nitriding layer, the nitriding time is 40 ⁇ 160min; and then quenched at 250-360 °C in a fluidized bed particle furnace.
  • the thickness of the carburizing layer is 4 to 16 ⁇ m, and the carburizing time is 70 minutes.
  • the thickness of the carburized layer is 5 ⁇ m.
  • the thickness of the nitriding layer is 4-12 ⁇ m, and the nitriding time is 80 minutes.
  • the surface hardness of the infiltration layer is greater than 1200 HV.
  • the argon gas flow rate is 12 to 16 L / min.
  • the method of the invention can eradicate the source of hydrocyanic acid by alternating carburizing and nitriding under the condition of continuous introduction of argon gas, and can be used instead of ferrite nitrocarburizing, which not only eliminates the pollution of hydrocyanic acid, but also Increase the depth of the effective hardened layer.
  • the infiltrated layers that are compounded alternately improve the hardness and corrosion resistance of the workpiece, and the process of the invention has the characteristics of fast processing speed and simple process, and is suitable for large-scale popularization.
  • the medium temperature gas nitrocarburizing quenching process of the present invention is characterized in that the formed crankshaft is put into a fluidized bed particle furnace and heated to 600-800 ° C for austenitizing; argon gas is passed into the furnace. Under the protection of argon, carburizing the austenitic stainless steel workpiece to form a carburizing layer, the carburizing time is 20 ⁇ 160min; continue to pass argon, and protect the austenitic stainless steel workpiece under the protection of argon. Nitriding treatment forms a nitriding layer, the nitriding time is 40-160min; and then is quenched isothermally at 250-360 ° C in a fluidized bed particle furnace.
  • the formed crankshaft is heated to 600 ° C by a fluidized bed particle furnace heating device for austenitization; argon gas is introduced into the furnace, and the flow rate of argon gas is 12 L / min.
  • Carburizing treatment of the stainless steel workpiece to form a carburizing layer the thickness of the carburizing layer is 4 ⁇ m, and the carburizing time is 70min; continue to pass argon, under the protection of argon, nitriding the austenitic stainless steel workpiece to form a nitriding layer, The thickness of the nitriding layer is 4 ⁇ m, and the nitriding time is 80 minutes; then, the temperature is quenched at 250 ° C. in a fluidized bed particle furnace.
  • the formed crankshaft is heated to 600 ° C by a fluidized bed particle furnace heating device to perform austenitization; argon gas is introduced into the furnace, and the flow rate of argon gas is 16L / min.
  • Carburizing treatment of the stainless steel workpiece to form a carburizing layer the thickness of the carburizing layer is 6 ⁇ m, and the carburizing time is 90min; continue to pass argon, under the protection of argon, nitriding the austenitic stainless steel workpiece to form a nitriding layer, The thickness of the nitriding layer is 8 ⁇ m, and the nitriding time is 100 minutes. Then, the nitriding layer is quenched at 250 ° C. in a fluidized bed particle furnace.
  • the formed crankshaft was heated to 800 ° C by a fluidized bed particle furnace heating device to perform austenitization; argon gas was introduced into the furnace, and the flow rate of argon gas was 16 L / min.
  • Carburizing treatment of the stainless steel workpiece to form a carburizing layer the thickness of the carburizing layer is 8 ⁇ m, and the carburizing time is 90 minutes; continue to pass argon, under the protection of argon, nitriding the austenitic stainless steel workpiece to form a nitriding layer, The thickness of the nitriding layer is 8 ⁇ m, and the nitriding time is 100 minutes.
  • the nitriding layer is quenched isothermally in a fluidized bed particle furnace at 280 ° C.
  • the method of the invention can eradicate the source of hydrocyanic acid by alternating carburizing and nitriding under the condition of continuous introduction of argon gas, and can be used instead of ferrite nitrocarburizing, which not only eliminates the pollution of hydrocyanic acid, but also Increase the depth of the effective hardened layer.
  • the infiltrated layers that are compounded alternately improve the hardness and corrosion resistance of the workpiece, and the process of the invention has the characteristics of fast processing speed and simple process, and is suitable for large-scale popularization.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials 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)

Abstract

La présente invention concerne un procédé de trempe de nitrocarburation de gaz à température moyenne. Le procédé comprend les étapes consistant à : placer un vilebrequin formé dans un four à particules à lit fluidisé devant être chauffé à 600-800 °C et procéder à une austénitisation ; introduire de l'argon dans le four et procéder à un traitement de carburation sur une pièce à usiner en acier inoxydable austénitique de façon à former une couche carburée sous la protection de l'argon, une durée de carburation étant comprise entre 20 et 160 min ; continuer à introduire de l'argon et procéder à un traitement de nitruration sur la pièce à usiner en acier inoxydable austénitique de façon à former une couche nitrurée sous la protection de l'argon, une durée de nitruration étant comprise entre 40 et 160 min ; puis procéder à une trempe isotherme dans le four à particules à lit fluidisé à 250-360 °C. D'après le procédé, le traitement de carburation et le traitement de nitruration sont effectués en alternance dans la condition d'introduction continue d'argon et les causes de la production d'acide cyanhydrique peuvent être éliminées. La dureté et la résistance à la corrosion de la pièce à usiner sont améliorées grâce à une couche nitrocarburée formée au moyen du mélange en alternance. De plus, la vitesse de traitement du procédé est élevée. En outre, le procédé est facile à réaliser et est approprié pour une popularisation et une utilisation à grande échelle.
PCT/CN2018/095301 2018-05-21 2018-07-11 Procédé de trempe de nitrocarburation de gaz à température moyenne WO2019223078A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810485190.9A CN108588633A (zh) 2018-05-21 2018-05-21 一种中温气体氮碳共渗淬火工艺
CN201810485190.9 2018-05-21

Publications (1)

Publication Number Publication Date
WO2019223078A1 true WO2019223078A1 (fr) 2019-11-28

Family

ID=63632016

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/095301 WO2019223078A1 (fr) 2018-05-21 2018-07-11 Procédé de trempe de nitrocarburation de gaz à température moyenne

Country Status (2)

Country Link
CN (1) CN108588633A (fr)
WO (1) WO2019223078A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2617664A (en) * 2022-02-11 2023-10-18 Skf Aerospace France Sas Method for reinforcing a steel component by carbonitriding

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108588386A (zh) * 2018-05-21 2018-09-28 江苏万力机械股份有限公司 一种高强度曲轴的生产方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07233411A (ja) * 1994-02-23 1995-09-05 Parker Netsushiyori Kogyo Kk 鉄鋼製部品の浸炭焼入れにおける変形低減および疲労強度改善方法
CN1424425A (zh) * 2002-12-25 2003-06-18 上海交通大学 复合热处理方法
CN101187027A (zh) * 2006-11-16 2008-05-28 刘文彬 一种新型复合热处理方法
WO2017216500A1 (fr) * 2016-06-17 2017-12-21 Aubert & Duval Composition d'acier

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1266289C (zh) * 2003-08-26 2006-07-26 张志祥 整体超强化球墨铸铁曲轴的生产方法
CN105057997A (zh) * 2015-08-07 2015-11-18 无锡桥阳机械制造有限公司 一种用Zn-Al-Ti-Mg系合金钢为材料的凸轮曲轴加工制造工艺

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07233411A (ja) * 1994-02-23 1995-09-05 Parker Netsushiyori Kogyo Kk 鉄鋼製部品の浸炭焼入れにおける変形低減および疲労強度改善方法
CN1424425A (zh) * 2002-12-25 2003-06-18 上海交通大学 复合热处理方法
CN101187027A (zh) * 2006-11-16 2008-05-28 刘文彬 一种新型复合热处理方法
WO2017216500A1 (fr) * 2016-06-17 2017-12-21 Aubert & Duval Composition d'acier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2617664A (en) * 2022-02-11 2023-10-18 Skf Aerospace France Sas Method for reinforcing a steel component by carbonitriding
US11905602B2 (en) 2022-02-11 2024-02-20 SKF Aerospace France S.A.S Method for reinforcing a steel component by carbonitriding

Also Published As

Publication number Publication date
CN108588633A (zh) 2018-09-28

Similar Documents

Publication Publication Date Title
Kayali et al. Investigation of mechanical properties of boro-tempered ductile iron
CN110172555B (zh) 一种改善钢的表层抗氢脆性能的脱碳工艺
Li et al. Effect of pre-existing carbides prepared by different heat treatments on the nitriding behaviour during a carburizing and nitriding duplex treatment of an M50NiL steel
CN101392361A (zh) 马氏体不锈钢氮碳共渗方法及其制品
JP3421265B2 (ja) 無段変速機ベルト用準安定オーステナイト系ステンレス鋼板およびその製造方法
CN110965014A (zh) 一种钢球碳氮共渗工艺
WO2019223078A1 (fr) Procédé de trempe de nitrocarburation de gaz à température moyenne
Zhang et al. Effect of process temperature on the microstructure and properties of gas oxynitrocarburized 35CrMo alloy steel
WO2019223491A1 (fr) Procédé de fabrication de vilebrequin à haute résistance
US20190300977A1 (en) Method of steel processing combining thermal and mechanical surface treatment to control metallurgical phase and mechanical response
WO2011115255A1 (fr) Acier à ressort et procédé de traitement de surface pour acier
Yamamoto et al. Modification of grain boundary microstructure by controlling dissolution behavior of θ particles in Cr-containing hypereutectoid steel
CN103774085B (zh) 一种在低碳合金钢表面制备的高氮奥氏体层及制备方法
Widi et al. White layer control on AISI 316L using temperature and gas nitriding diffusion stage process
Han et al. A Research on Selective Carburization Process of Low Carbon Steel
Krauss Bending fatigue of carburized steels
Hsu et al. Ultra-high strength steel treated by using quenching–partitioning–tempering process
CN109295411A (zh) 一种q&p&t工艺下的汽车传动齿轮
Adzali et al. Heat Treatment of SS 316L for Automotive Applications
Jaypuria Heat treatment of low carbon steel
Chawla et al. Anti-corrosion treatment for bearing steel
Ciski et al. Heat treatment of nitrided layer formed on X37CrMoV5-1 hot working tool steel
Sonawane et al. Review on recent trends & optimisation in heat treatment
Hussiain et al. Effect of Heat Treatment in Low Carbon Steel
Izotov et al. Effect of the pearlitic steel structure on the mechanical properties and fracture upon loading by static bending

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18919674

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18919674

Country of ref document: EP

Kind code of ref document: A1