WO2018103079A1 - Procédé de traitement thermique permettant d'augmenter la résistance d'un acier pour roulements - Google Patents

Procédé de traitement thermique permettant d'augmenter la résistance d'un acier pour roulements Download PDF

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Publication number
WO2018103079A1
WO2018103079A1 PCT/CN2016/109248 CN2016109248W WO2018103079A1 WO 2018103079 A1 WO2018103079 A1 WO 2018103079A1 CN 2016109248 W CN2016109248 W CN 2016109248W WO 2018103079 A1 WO2018103079 A1 WO 2018103079A1
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WO
WIPO (PCT)
Prior art keywords
steel
temperature
furnace
cooled
heat treatment
Prior art date
Application number
PCT/CN2016/109248
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English (en)
Chinese (zh)
Inventor
张康
叶永
Original Assignee
机械科学研究总院青岛分院有限公司
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.)
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Application filed by 机械科学研究总院青岛分院有限公司 filed Critical 机械科学研究总院青岛分院有限公司
Priority to PCT/CN2016/109248 priority Critical patent/WO2018103079A1/fr
Publication of WO2018103079A1 publication Critical patent/WO2018103079A1/fr

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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
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • 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
    • C21D1/26—Methods of annealing
    • C21D1/28—Normalising
    • 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
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/58—Oils
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/04—Hardening by cooling below 0 degrees Celsius
    • 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

Definitions

  • the invention relates to the technical field of heat treatment of bearing steel, in particular to a heat treatment process for improving the toughness of a bearing steel.
  • Bearing steel is steel used to make balls, rollers and bearing rings. Bearing steels have high and uniform hardness and wear resistance, as well as high elastic limits. The uniformity of the chemical composition of the bearing steel, the content and distribution of non-metallic inclusions, and the distribution of carbides are all very strict, and it is one of the most demanding steel grades in all steel production.
  • bearing steel The physical properties of bearing steel are mainly based on inspection of microstructure, decarburization layer, non-metallic inclusions and low-fold structure. In general, it is delivered by hot rolling annealing and cold drawing annealing. The delivery status should be stated in the contract.
  • the low-magnification of steel must be free of shrinkage, subcutaneous bubbles, white spots and microscopic pores.
  • the center is loose, generally loose, no more than 1.5, and segregation must not exceed 2.
  • the annealed structure of the steel should be a uniformly distributed fine-grained pearlite. Decarburization depth, non-metallic inclusions and carbide non-uniformity shall comply with the relevant national standards.
  • the present invention proposes a heat treatment process for improving the toughness of a bearing steel.
  • the heat treatment process for improving the toughness of a bearing steel proposed by the invention comprises the following steps:
  • the oil is motor oil, spindle oil, transformer oil or diesel oil.
  • the steel material is kept at 940 ° C for 5 h, the temperature is cooled to 830 ° C at a rate of 35 ° C / h, and the temperature is kept for 1.5 h, and then the temperature is cooled to 650 ° C at a rate of 25 ° C / h, and the heat is maintained at 1.5. After h, the air is cooled.
  • the steel is kept at a temperature of 1050 ° C for 1.5 h, and then rapidly quenched into an oil of 150 ° C to cool, so that the carbide distribution is uniform, waiting for the steel The temperature was taken down to 165 ° C and then air cooled.
  • the bearing steel has a carbon content of 0.8 to 1.4%.
  • the bearing steel has a carbon content of 1.1%.
  • the steel material is first annealed and normalized, and the temperature and time are strictly required. Then, under the protection of nitrogen, the steel is kept warm, the carbide distribution is uniform, and the secondary freezing treatment is repeated.
  • the secondary tempering improves the toughness of the material, effectively alleviates the stress concentration at the crack tip, delays or terminates the crack propagation, and improves the fatigue life of the bearing steel.
  • the bearing steel prepared by the invention has higher purity and the number of inclusions. Less, the carbide is fine and dispersed, and the size is uniform, and the toughness is remarkably improved.
  • the heat treatment process for improving the toughness of a bearing steel proposed by the invention comprises the following steps:
  • the heat treatment process for improving the toughness of a bearing steel proposed by the invention comprises the following steps:
  • the heat treatment process for improving the toughness of a bearing steel proposed by the invention comprises the following steps:
  • the heat treatment process for improving the toughness of a bearing steel proposed by the invention comprises the following steps:
  • the heat treatment process for improving the toughness of a bearing steel proposed by the invention comprises the following steps:

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)
  • Oil, Petroleum & Natural Gas (AREA)
  • Rolling Contact Bearings (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

L'invention concerne un procédé de traitement thermique permettant d'augmenter la résistance d'un acier pour roulements, comprenant les étapes suivantes : S1 recuisson : un matériau en acier est maintenu chaud à 880-1 000 °C pendant 4-6 h, puis la température est abaissée au rythme de 25-45 °C/h jusqu'à 800-860 °C et le matériau en acier est maintenu chaud pendant 1-2 h, puis la température est abaissée au rythme de 20-30 °C/h jusqu'à 600-700 °C et le matériau en acier est maintenu chaud pendant 1-2 h, avant d'être retiré du four pour être refroidi à l'air ; S2 normalisation : la température dans le four est augmentée jusqu'à 750-820 °C, le matériau en acier est placé à l'intérieur de celui-ci, maintenu chaud pendant 2-4 h et retiré du four pour être refroidi à l'air ; S3 trempe : sous une protection d'azote gazeux, le matériau en acier est maintenu chaud à une température de 1 000-1 100 °C pendant 1-2 h, puis trempé rapidement dans une huile à 100-220 °C pour être refroidi, avec pour résultat une répartition uniforme du carbure, puis le matériau en acier en est retiré lorsque sa température chute à 150-180 °C, pour être refroidi à l'air ; S4 traitement de congélation primaire : le matériau en acier du S3 est traité à froid à une température de -73 °C pendant 1-2 h ; et S5 tempérage primaire : le matériau en acier est placé dans un four de tempérage et, le four de tempérage étant chauffé à 150-170 °C, maintenu chaud pendant 1-3 h. L'acier pour roulements préparé par le procédé est d'une plus grande pureté et présente une quantité réduite d'impuretés, de fines et de carbures diffusés, une taille uniforme et une résistance significativement accrue.
PCT/CN2016/109248 2016-12-09 2016-12-09 Procédé de traitement thermique permettant d'augmenter la résistance d'un acier pour roulements WO2018103079A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2016/109248 WO2018103079A1 (fr) 2016-12-09 2016-12-09 Procédé de traitement thermique permettant d'augmenter la résistance d'un acier pour roulements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2016/109248 WO2018103079A1 (fr) 2016-12-09 2016-12-09 Procédé de traitement thermique permettant d'augmenter la résistance d'un acier pour roulements

Publications (1)

Publication Number Publication Date
WO2018103079A1 true WO2018103079A1 (fr) 2018-06-14

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110055381A (zh) * 2019-04-29 2019-07-26 武钢集团昆明钢铁股份有限公司 一种轻量工模具钢的氮气保护退火工艺
CN111979392A (zh) * 2020-08-31 2020-11-24 昆山海子精密金属工业有限公司 模具钢材高效加工工艺
CN112195326A (zh) * 2020-09-27 2021-01-08 宁夏天地西北煤机有限公司 强化工模具钢性能的深冷工艺
CN112853078A (zh) * 2020-12-25 2021-05-28 中钢集团邢台机械轧辊有限公司 一种中铬材质轧辊回火加工工艺
CN114055086A (zh) * 2021-11-18 2022-02-18 辽宁忠旺集团有限公司 一种7CrSiMnMoV钢拉网刀片及其制造方法
CN114150114A (zh) * 2021-11-10 2022-03-08 广东世创金属科技股份有限公司 一种焊管模具钢的改进热处理方法
CN114622082A (zh) * 2022-03-21 2022-06-14 无锡亿宝机械设备有限公司 一种d2材质的全硬化1号中间辊的高效热处理方法
CN114774642A (zh) * 2022-04-25 2022-07-22 中航试金石检测科技(西安)有限公司 一种a-100钢热处理工艺
CN115125376A (zh) * 2022-07-06 2022-09-30 广西大藤峡水利枢纽开发有限责任公司 G102Cr18Mo不锈钢锻件的锻后热处理工艺及锻造工艺
CN115365767A (zh) * 2022-08-26 2022-11-22 山东天工岩土工程设备有限公司 一种粉末冶金压制模具加工工艺及粉末冶金压制模具

Citations (4)

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EP0861907B1 (fr) * 1991-12-03 2001-08-16 Koyo Seiko Co., Ltd. Eléments de palier et leur procédé de fabrication
CN101947630A (zh) * 2010-09-17 2011-01-19 洛阳轴研科技股份有限公司 GCr15制作轴承套圈的控锻控冷加工工艺
CN104328250A (zh) * 2014-11-27 2015-02-04 王俐帧 一种轴承钢热处理工艺
CN106555040A (zh) * 2016-12-02 2017-04-05 机械科学研究总院青岛分院 一种提高轴承钢韧性的热处理工艺

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0861907B1 (fr) * 1991-12-03 2001-08-16 Koyo Seiko Co., Ltd. Eléments de palier et leur procédé de fabrication
CN101947630A (zh) * 2010-09-17 2011-01-19 洛阳轴研科技股份有限公司 GCr15制作轴承套圈的控锻控冷加工工艺
CN104328250A (zh) * 2014-11-27 2015-02-04 王俐帧 一种轴承钢热处理工艺
CN106555040A (zh) * 2016-12-02 2017-04-05 机械科学研究总院青岛分院 一种提高轴承钢韧性的热处理工艺

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110055381A (zh) * 2019-04-29 2019-07-26 武钢集团昆明钢铁股份有限公司 一种轻量工模具钢的氮气保护退火工艺
CN110055381B (zh) * 2019-04-29 2020-08-07 武钢集团昆明钢铁股份有限公司 一种轻量工模具钢的氮气保护退火工艺
CN111979392A (zh) * 2020-08-31 2020-11-24 昆山海子精密金属工业有限公司 模具钢材高效加工工艺
CN112195326A (zh) * 2020-09-27 2021-01-08 宁夏天地西北煤机有限公司 强化工模具钢性能的深冷工艺
CN112853078A (zh) * 2020-12-25 2021-05-28 中钢集团邢台机械轧辊有限公司 一种中铬材质轧辊回火加工工艺
CN114150114A (zh) * 2021-11-10 2022-03-08 广东世创金属科技股份有限公司 一种焊管模具钢的改进热处理方法
CN114150114B (zh) * 2021-11-10 2023-01-03 广东世创金属科技股份有限公司 一种焊管模具钢的改进热处理方法
CN114055086A (zh) * 2021-11-18 2022-02-18 辽宁忠旺集团有限公司 一种7CrSiMnMoV钢拉网刀片及其制造方法
CN114622082A (zh) * 2022-03-21 2022-06-14 无锡亿宝机械设备有限公司 一种d2材质的全硬化1号中间辊的高效热处理方法
CN114774642A (zh) * 2022-04-25 2022-07-22 中航试金石检测科技(西安)有限公司 一种a-100钢热处理工艺
CN114774642B (zh) * 2022-04-25 2023-11-24 中航试金石检测科技(西安)有限公司 一种a-100钢热处理工艺
CN115125376A (zh) * 2022-07-06 2022-09-30 广西大藤峡水利枢纽开发有限责任公司 G102Cr18Mo不锈钢锻件的锻后热处理工艺及锻造工艺
CN115125376B (zh) * 2022-07-06 2023-10-31 广西大藤峡水利枢纽开发有限责任公司 G102Cr18Mo不锈钢锻件的锻后热处理工艺及锻造工艺
CN115365767A (zh) * 2022-08-26 2022-11-22 山东天工岩土工程设备有限公司 一种粉末冶金压制模具加工工艺及粉末冶金压制模具

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