CN106808166A - The manufacture craft of carburizing steel gear - Google Patents

The manufacture craft of carburizing steel gear Download PDF

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Publication number
CN106808166A
CN106808166A CN201510846054.4A CN201510846054A CN106808166A CN 106808166 A CN106808166 A CN 106808166A CN 201510846054 A CN201510846054 A CN 201510846054A CN 106808166 A CN106808166 A CN 106808166A
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CN
China
Prior art keywords
carburizing
manufacture craft
workpiece
quenching
steel gear
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Pending
Application number
CN201510846054.4A
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Chinese (zh)
Inventor
赵敏
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赵敏
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Priority to CN201510846054.4A priority Critical patent/CN106808166A/en
Publication of CN106808166A publication Critical patent/CN106808166A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/14Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels

Abstract

The invention discloses a kind of manufacture craft of 20CrMo carburizings steel gear, including following operation:Forging stock → normalizing → machining → partial annealing → machining → carburizing and quenching → tempering → ball blast, wherein partial annealing technique is under the protection of atmosphere, in Ac1+(30-50)DEG C temperature conditionss under be incubated 2 hours, and air cooling after cooling to 700 ~ 720 DEG C with the furnace.The manufacture craft of 20CrMo carburizings steel gear of the present invention can not only more thoroughly eliminate inner stress of work, and the crystalline phase institutional framework of workpiece can be improved, so that workpiece substrate tissue is more uniform, the deflection in follow-up carburizing and quenching operation is smaller, it is ensured that the machining accuracy of workpiece.

Description

The manufacture craft of carburizing steel gear
Technical field
The present invention relates to a kind of Gearmaking Technology, the gear of gear is specifically made for a kind of use 20CrMo carburizing steel Manufacture craft.
Background technology
Motorcycle-gear is typically made using 20CrMo steel, during the cold working using 20CrMo steel making gears, In order to eliminate inner stress of work, reduce the deformation of workpiece and prevent workpiece from ftractureing, generally using 500 ~ 600 DEG C of stress relief annealing Processed.Although can to a certain extent remove inner stress of work, inner stress of work using the stress relief annealing technique Not fully, matrix is also not uniform enough for removal, causes to process the deflection of workpiece in the follow-up carburizing quenching process of gear It is whard to control, it is denatured larger.
In consideration of it, the present invention proposes a kind of manufacture craft of carburizing steel gear, the manufacture craft of the carburizing steel gear is not Inner stress of work only can be more thoroughly eliminated, and the crystalline phase institutional framework of workpiece can be improved so that workpiece substrate group Knit more uniform, the deflection in follow-up carburizing and quenching operation is smaller, it is ensured that the machining accuracy of workpiece.
The content of the invention
The technical problem of solution is to propose a kind of manufacture craft of carburizing steel gear, the making of the 20CrMo carburizing steel gears Technique can not only more thoroughly eliminate inner stress of work, and can improve the crystalline phase institutional framework of workpiece so that workpiece Matrix is more uniform, and the deflection in follow-up carburizing and quenching operation is smaller, it is ensured that the machining accuracy of workpiece.
State technical purpose, the manufacture craft of carburizing steel gear of the invention, including following operation:Forging stock → normalizing → machine Processing → partial annealing → machining → carburizing and quenching → tempering → ball blast, wherein partial annealing technique is the guarantor in atmosphere Under shield, in Ac1+(30-50)DEG C temperature conditionss under be incubated 2 hours, and air cooling after cooling to 700 ~ 720 DEG C with the furnace.
The protective atmosphere is methanol gas.
Beneficial effects of the present invention are:The manufacture craft of carburizing steel gear of the present invention is due to the heating of partial annealing operation Temperature is the Ac1+ of 20CrMo steel(30-50)DEG C, the crystalline phase tissue part austenitizing of 20CrMo carburizing steel can be made, then empty During cold, structural transformation is fine pearlite and ferrite, effectively eliminates the stress produced during cold working;Together When, due to tissue part's austenitizing, there is no the stress relief annealing of tissue change in relatively general, destressing effect is good, and Matrix evenly, is relatively easy to control follow-up carburizing and quenching deformation;Therefore, the making work of carburizing steel gear of the present invention Skill can not only more thoroughly eliminate inner stress of work, and can improve the crystalline phase institutional framework of workpiece so that workpiece base Body tissue is more uniform, and the deflection in follow-up carburizing and quenching operation is smaller, it is ensured that the machining accuracy of workpiece.
Specific embodiment
Specific embodiment of the invention is elaborated below.
The manufacture craft of carburizing steel gear of the present invention, including following operation:Forging stock → normalizing → machining → not exclusively move back Fire → machining → carburizing and quenching → tempering → ball blast, wherein partial annealing technique be under the atmosphere protection of methanol gas, In Ac1+(30-50)DEG C temperature conditionss under be incubated 2 hours, and air cooling after cooling to 700 ~ 720 DEG C with the furnace.Carburizing steel of the present invention Other operations of the manufacture craft of gear are same as the prior art, no longer tire out one by one and state.
The manufacture craft of carburizing steel gear of the present invention is the Ac1 of 20CrMo steel due to the heating-up temperature of partial annealing operation +(30-50)DEG C, the critical-temperature Ac1 of 20CrMo steel is 743 DEG C, can make the crystalline phase tissue part austenite of 20CrMo carburizing steel Change, in subsequent process air cooler, structural transformation is fine pearlite and ferrite, effectively eliminate product during cold working Raw stress;Simultaneously as tissue part's austenitizing, there is no the stress relief annealing of tissue change in relatively general, and going should Power effect is good, and matrix is evenly, is relatively easy to control follow-up carburizing and quenching deformation;Therefore, carburizing steel of the present invention The manufacture craft of gear can not only more thoroughly eliminate inner stress of work, and can improve the crystalline phase knot of tissue of workpiece Structure so that workpiece substrate tissue is more uniform, the deflection in follow-up carburizing and quenching operation is smaller, it is ensured that the processing essence of workpiece Degree.
First embodiment
The manufacture craft of the present embodiment carburizing steel gear, including following operation:Forging stock → normalizing → machining → partial annealing → machining → carburizing and quenching → tempering → ball blast, wherein partial annealing technique be under the atmosphere protection of methanol gas, 2 hours are incubated under 780 DEG C of temperature conditionss, and air cooling after cooling to 720 DEG C with the furnace.The making work of the present embodiment carburizing steel gear Other operations of skill are same as the prior art, no longer tire out one by one and state.
The manufacture craft of the present embodiment carburizing steel gear is 780 DEG C, the temperature due to the heating-up temperature of partial annealing operation Degree falls in the Ac1+ of 20CrMo steel(30-50)Between DEG C, the crystalline phase tissue part austenitizing of 20CrMo carburizing steel can be made, with Afterwards in process air cooler, structural transformation is fine pearlite and ferrite, effectively eliminate produce during cold working should Power.Simultaneously as tissue part's austenitizing, there is no the stress relief annealing of tissue change, destressing effect in relatively general It is good, and matrix is evenly, is relatively easy to control follow-up carburizing and quenching deformation.Therefore, carburizing steel gear of the present invention Manufacture craft can not only more thoroughly eliminate inner stress of work, and can improve the crystalline phase institutional framework of workpiece so that Workpiece substrate tissue is more uniform, and the deflection in follow-up carburizing and quenching operation is smaller, it is ensured that the machining accuracy of workpiece.
Second embodiment
The manufacture craft of the present embodiment carburizing steel gear, including following operation:Forging stock → normalizing → machining → partial annealing → machining → carburizing and quenching → tempering → ball blast, wherein partial annealing technique be under the atmosphere protection of methanol gas, 2 hours are incubated under 775 DEG C of temperature conditionss, and air cooling after cooling to 700 DEG C with the furnace.The making work of the present embodiment carburizing steel gear Other operations of skill are same as the prior art, no longer tire out one by one and state.
The manufacture craft of the present embodiment carburizing steel gear is 775 DEG C, the temperature due to the heating-up temperature of partial annealing operation Degree falls in the Ac1+ of 20CrMo steel(30-50)Between DEG C, the crystalline phase tissue part austenitizing of 20CrMo carburizing steel can be made, with Afterwards in process air cooler, structural transformation is fine pearlite and ferrite, effectively eliminate produce during cold working should Power.Simultaneously as tissue part's austenitizing, there is no the stress relief annealing of tissue change, destressing effect in relatively general It is good, and matrix is evenly, is relatively easy to control follow-up carburizing and quenching deformation.Therefore, carburizing steel gear of the present invention Manufacture craft can not only more thoroughly eliminate inner stress of work, and can improve the crystalline phase institutional framework of workpiece so that Workpiece substrate tissue is more uniform, and the deflection in follow-up carburizing and quenching operation is smaller, it is ensured that the machining accuracy of workpiece.
The manufacture craft of 3rd embodiment the present embodiment carburizing steel gear, including following operation:Forging stock → normalizing → machine adds Work → partial annealing → machining → carburizing and quenching → tempering → ball blast, wherein partial annealing technique is in methanol gas Under atmosphere protection, 2 hours are incubated under 790 DEG C of temperature conditionss, and air cooling after cooling to 710 DEG C with the furnace.The present embodiment carburizing Other operations of the manufacture craft of steel gear are same as the prior art, no longer tire out one by one and state.
The manufacture craft of the present embodiment carburizing steel gear is 790 DEG C, the temperature due to the heating-up temperature of partial annealing operation Degree falls in the Ac1+ of 20CrMo steel(30-50)Between DEG C, the crystalline phase tissue part austenitizing of 20CrMo carburizing steel can be made, with Afterwards in process air cooler, structural transformation is fine pearlite and ferrite, effectively eliminate produce during cold working should Power.Simultaneously as tissue part's austenitizing, there is no the stress relief annealing of tissue change, destressing effect in relatively general It is good, and matrix is evenly, is relatively easy to control follow-up carburizing and quenching deformation.Therefore, carburizing steel gear of the present invention Manufacture craft can not only more thoroughly eliminate inner stress of work, and can improve the crystalline phase institutional framework of workpiece so that Workpiece substrate tissue is more uniform, and the deflection in follow-up carburizing and quenching operation is smaller, it is ensured that the machining accuracy of workpiece.
Certainly, described above is not limitation of the present invention, and the present invention is also not limited to the example above, the art Those of ordinary skill, in essential scope of the invention, the change made, remodeling, addition or replace, should all belong to the present invention It should be understood by those skilled in the art that, the present invention is not limited to the above embodiments, described in above-described embodiment and specification Merely illustrate the principles of the invention, without departing from the spirit and scope of the present invention, the present invention also have various change And improvement, these changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended Claims and its equivalent thereof.

Claims (2)

1. a kind of manufacture craft of carburizing steel gear, it is characterised in that:Including following operation:Forging stock → normalizing → machining → no Full annealing → machining → carburizing and quenching → tempering → ball blast, wherein partial annealing technique be under the protection of atmosphere, Ac1+(30-50)DEG C temperature conditionss under be incubated 2 hours, and air cooling after cooling to 700 ~ 720 DEG C with the furnace.
2. the manufacture craft of carburizing steel gear according to claim 1, it is characterised in that:The protective atmosphere is methyl alcohol gas Body.
CN201510846054.4A 2015-11-30 2015-11-30 The manufacture craft of carburizing steel gear Pending CN106808166A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510846054.4A CN106808166A (en) 2015-11-30 2015-11-30 The manufacture craft of carburizing steel gear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510846054.4A CN106808166A (en) 2015-11-30 2015-11-30 The manufacture craft of carburizing steel gear

Publications (1)

Publication Number Publication Date
CN106808166A true CN106808166A (en) 2017-06-09

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CN201510846054.4A Pending CN106808166A (en) 2015-11-30 2015-11-30 The manufacture craft of carburizing steel gear

Country Status (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107858595A (en) * 2017-11-29 2018-03-30 宁波市鸿博机械制造有限公司 A kind of hydraulic pump splined spindle
CN111218551A (en) * 2020-03-03 2020-06-02 贾春腾 Heat treatment process for clutch disc hub
CN112792523A (en) * 2020-12-28 2021-05-14 江阴市万里锻件有限公司 Preparation method of high-strength gear for excavator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107858595A (en) * 2017-11-29 2018-03-30 宁波市鸿博机械制造有限公司 A kind of hydraulic pump splined spindle
CN111218551A (en) * 2020-03-03 2020-06-02 贾春腾 Heat treatment process for clutch disc hub
CN111218551B (en) * 2020-03-03 2021-12-07 西伯瀚(泰兴)传动技术有限公司 Heat treatment process for clutch disc hub
CN112792523A (en) * 2020-12-28 2021-05-14 江阴市万里锻件有限公司 Preparation method of high-strength gear for excavator

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Application publication date: 20170609