CN107779565A - 一种汽车变速齿轮热处理工艺 - Google Patents

一种汽车变速齿轮热处理工艺 Download PDF

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CN107779565A
CN107779565A CN201610733649.3A CN201610733649A CN107779565A CN 107779565 A CN107779565 A CN 107779565A CN 201610733649 A CN201610733649 A CN 201610733649A CN 107779565 A CN107779565 A CN 107779565A
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李楠
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    • 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
    • C21D1/06—Surface hardening
    • 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
    • C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/32—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like
    • 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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F17/00—Multi-step processes for surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by subclass C21D or C22F or class C25

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  • 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)
  • Heat Treatment Of Articles (AREA)

Abstract

本发明提供一种汽车变速齿轮热处理工艺，包括以下步骤：a1、正火处理：工件在锻造加工后放入炉中加热到温度为750～800℃时，保温30～60分钟，达到硬度HB163～217后工件出炉，进行自然冷却；a2、调质处理：工件粗加工后放入炉中加热到温度为840～860℃进行40～50分钟的淬火，工件出炉油冷，间隔1～1.5小时进行高温回火，加热到500～650℃时，保温40～60分钟，达到硬度HB220～285后工件出炉水冷；a3、表面淬火：工件半精加工后在炉中加热到温度为850～860℃时，保温40～60分钟，达到硬度HRC45～55后工件出炉油冷；a4、渗氮：工件精加工后放入存有气体渗氮的密封容器内加热到温度为550～700℃时，保温0.5～3小时，工件随炉冷却。本发明汽车变速齿轮热处理工艺，操作步骤明确，热处理效果好且效率高。

Description

一种汽车变速齿轮热处理工艺
技术领域
本发明涉及一种热处理工艺，特别涉及一种汽车变速齿轮热处理工艺。
背景技术
汽车变速齿轮是汽车变速箱上的一个重要部件，其由锻造加粗精加工而成，由于其是关键部件，因此对其质量和强度有较高要求。
发明内容
【1】要解决的技术问题
本发明要解决的技术问题是提供一种操作步骤明确，热处理效果好且效率高的汽车变速齿轮热处理工艺。
【2】解决问题的技术方案
本发明提供一种汽车变速齿轮热处理工艺，所述汽车变速齿轮材质为40Cr钢，所述40Cr钢热处理工艺包括以下步骤：
a1、正火处理：工件在锻造加工后放入炉中加热到温度为750～800℃时，保温30～60分钟，达到硬度HB163～217后工件出炉，进行自然冷却；
a2、调质处理：工件粗加工后放入炉中加热到温度为840～860℃进行40～50分钟的淬火，工件出炉油冷，间隔1～1.5小时进行高温回火，加热到500～650℃时，保温40～60分钟，达到硬度HB220～285后工件出炉水冷；
a3、表面淬火：工件半精加工后在炉中加热到温度为850～860℃时，保温40～60分钟，达到硬度HRC45～55后工件出炉油冷；
a4、渗氮：工件精加工后放入存有气体渗氮的密封容器内加热到温度为550～700℃时，保温0.5～3小时，工件随炉冷却。
【3】有益效果
本发明汽车变速齿轮热处理工艺，操作步骤明确，具有高的抗疲劳点蚀、硬度、耐磨性、韧性，热处理效果好且效率高。
具体实施方式
下面详细介绍本发明实施例。
本发明提供一种汽车变速齿轮热处理工艺，该汽车变速齿轮材质为40Cr钢，该40Cr钢热处理工艺包括以下步骤：
a1、正火处理：工件在锻造加工后放入炉中加热到温度为750～800℃时，保温30～60分钟，达到硬度HB163～217后工件出炉，进行自然冷却；
a2、调质处理：工件粗加工后放入炉中加热到温度为840～860℃进行40～50分钟的淬火，工件出炉油冷，间隔1～1.5小时进行高温回火，加热到500～650℃时，保温40～60分钟，达到硬度HB220～285后工件出炉水冷；
a3、表面淬火：工件半精加工后在炉中加热到温度为850～860℃时，保温40～60分钟，达到硬度HRC45～55后工件出炉油冷；
a4、渗氮：工件精加工后放入存有气体渗氮的密封容器内加热到温度为550～700℃时，保温0.5～3小时，工件随炉冷却。
完成热处理后，对汽车变速齿轮进行抽样检测，包括抗疲劳点蚀、硬度、韧性等测试。
本发明汽车变速齿轮热处理工艺，操作步骤明确，具有高的抗疲劳点蚀、硬度、耐磨性、韧性，热处理效果好且效率高。
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明技术原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。

Claims (1)

1.一种汽车变速齿轮热处理工艺，所述汽车变速齿轮材质为40Cr钢，其特征在于，所述40Cr钢热处理工艺包括以下步骤：
a1、正火处理：工件在锻造加工后放入炉中加热到温度为750～800℃时，保温30～60分钟，达到硬度HB163～217后工件出炉，进行自然冷却；
a2、调质处理：工件粗加工后放入炉中加热到温度为840～860℃进行40～50分钟的淬火，工件出炉油冷，间隔1～1.5小时进行高温回火，加热到500～650℃时，保温40～60分钟，达到硬度HB220～285后工件出炉水冷；
a3、表面淬火：工件半精加工后在炉中加热到温度为850～860℃时，保温40～60分钟，达到硬度HRC45～55后工件出炉油冷；
a4、渗氮：工件精加工后放入存有气体渗氮的密封容器内加热到温度为550～700℃时，保温0.5～3小时，工件随炉冷却。
CN201610733649.3A 2016-08-25 2016-08-25 一种汽车变速齿轮热处理工艺 Pending CN107779565A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114000058A (zh) * 2021-11-03 2022-02-01 西安法士特汽车传动有限公司 一种稀土合金化的钢材及其渗氮方法及一种渗氮钢件

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114000058A (zh) * 2021-11-03 2022-02-01 西安法士特汽车传动有限公司 一种稀土合金化的钢材及其渗氮方法及一种渗氮钢件

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Application publication date: 20180309