CN106808166A - The manufacture craft of carburizing steel gear - Google Patents
The manufacture craft of carburizing steel gear Download PDFInfo
- 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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- China
- Prior art keywords
- carburizing
- manufacture craft
- workpiece
- steel gear
- machining
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/14—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Articles (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
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
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.
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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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510846054.4A Pending CN106808166A (en) | 2015-11-30 | 2015-11-30 | The manufacture craft of carburizing steel gear |
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| Country | Link |
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| CN (1) | CN106808166A (en) |
Cited By (3)
| 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 |
-
2015
- 2015-11-30 CN CN201510846054.4A patent/CN106808166A/en active Pending
Cited By (4)
| 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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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170609 |