CN105624691A - Carburizing and quenching process for 20Cr2Ni4A steel gear - Google Patents
Carburizing and quenching process for 20Cr2Ni4A steel gear Download PDFInfo
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- CN105624691A CN105624691A CN201410688417.1A CN201410688417A CN105624691A CN 105624691 A CN105624691 A CN 105624691A CN 201410688417 A CN201410688417 A CN 201410688417A CN 105624691 A CN105624691 A CN 105624691A
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- carburizing
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- quenching process
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Abstract
The invention discloses a carburizing and quenching process for a 20Cr2Ni4A steel gear. The carburizing and quenching process is characterized by comprising the following steps of firstly, temperature equalization: raising the temperature of a pit-type carburizing furnace to 560 to 570DEG C, placing workpieces into the pit-type carburizing furnace and preheating for 1 hour; secondly, temperature rise and exhaust: dropping kerosene at the speed of 5 to 5.5ml/min, carburizing at 920DEG C, insulating for 3 hours, wherein the furnace pressure is 200mm of water column height, dispersing at 920DEG C, then discharging from the furnace and performing air cooling; thirdly, high-temperature tempering: performing high-temperature tempering at 600DEG C; fourthly, secondary quenching: introducing ammonia at 810DEG C for carbonitriding and then quenching; and fifthly, low-temperature tempering: performing low-temperature tempering at 150DEG C and insulating for 3 hours. According to the process, the flow is simple, and more repeated working procedures are omitted, so that the working efficiency is improved; and in addition, the carburized gear is good in various properties.
Description
Technical field
The present invention relates to a kind of 20Cr2Ni4A steel gear carburizing quenching process.
Background technology
Current 20Cr2Ni4A steel gear carburizing quenching process is more complicated, also without unified specification, not unified standard, the steel gear quality causing production is uneven, a lot of operations that repeat also make under production efficiency, increase the work burden of workman, make the competitiveness of product in market not high simultaneously. For some operators just entered a profession, it does not have a clear and definite method technique, cause, when operation, mistakes and omissions often occur, in some instances it may even be possible to cause serious consequence.
Summary of the invention
Because the drawbacks described above of prior art, the technical problem to be solved is to provide a kind of 20Cr2Ni4A steel gear carburizing quenching process, and this technique is simple, eliminates a lot of repeatability operation, improve work efficiency, and the gear various aspects of performance after carburizing is all relatively good.
For achieving the above object, the invention provides a kind of 20Cr2Ni4A steel gear carburizing quenching process, it is characterised in that comprise the steps, 1) samming: pit carburizing furnace is warming up to 560-570 DEG C, puts the workpiece in preheating 1h;
2) intensification aerofluxus: drip kerosene 5-5.5ml/min, oozes by force 920 DEG C of insulation 3h, and furnace pressure is that 200mm water column is high, is diffused at 920 DEG C, air cooling of then coming out of the stove;
3) high tempering: carry out high tempering at 600 DEG C;
4) secondary quenching: carry out carbo-nitriding at 810 DEG C of logical ammonias, then quench;
5) lonneal: carry out lonneal at 150 DEG C, and be incubated 3h.
The invention has the beneficial effects as follows: present invention process is simple, eliminate a lot of repeatability operation, improve work efficiency, and the gear various aspects of performance after carburizing is all relatively good.
Detailed description of the invention
Technical scheme disclosed by the invention is a kind of 20Cr2Ni4A steel gear carburizing quenching process, it is characterised in that comprise the steps, 1) samming: pit carburizing furnace is warming up to 560-570 DEG C, puts the workpiece in preheating 1h;
2) intensification aerofluxus: drip kerosene 5-5.5ml/min, oozes by force 920 DEG C of insulation 3h, and furnace pressure is that 200mm water column is high, is diffused at 920 DEG C, air cooling of then coming out of the stove;
3) high tempering: carry out high tempering at 600 DEG C;
4) secondary quenching: carry out carbo-nitriding at 810 DEG C of logical ammonias, then quench;
5) lonneal: carry out lonneal at 150 DEG C, and be incubated 3h.
Present invention process is simple, eliminates a lot of repeatability operation, improves work efficiency, and the gear various aspects of performance after carburizing is all relatively good.
The preferred embodiment of the present invention described in detail above. Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to the design of the present invention without creative work. Therefore, all technical staff in the art, all should in the protection domain being defined in the patent claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (1)
1. a 20Cr2Ni4A steel gear carburizing quenching process, it is characterised in that comprise the steps, 1) samming: pit carburizing furnace is warming up to 560-570 DEG C, puts the workpiece in preheating 1h;
2) intensification aerofluxus: drip kerosene 5-5.5ml/min, oozes by force 920 DEG C of insulation 3h, and furnace pressure is that 200mm water column is high, is diffused at 920 DEG C, air cooling of then coming out of the stove;
3) high tempering: carry out high tempering at 600 DEG C;
4) secondary quenching: carry out carbo-nitriding at 810 DEG C of logical ammonias, then quench;
5) lonneal: carry out lonneal at 150 DEG C, and be incubated 3h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410688417.1A CN105624691A (en) | 2014-11-26 | 2014-11-26 | Carburizing and quenching process for 20Cr2Ni4A steel gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410688417.1A CN105624691A (en) | 2014-11-26 | 2014-11-26 | Carburizing and quenching process for 20Cr2Ni4A steel gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105624691A true CN105624691A (en) | 2016-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410688417.1A Pending CN105624691A (en) | 2014-11-26 | 2014-11-26 | Carburizing and quenching process for 20Cr2Ni4A steel gear |
Country Status (1)
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| CN (1) | CN105624691A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106521402A (en) * | 2016-11-29 | 2017-03-22 | 金川集团股份有限公司 | Whole heat treatment method for 23CrNi3MoA hollow steel rock drill rod |
| CN112025231A (en) * | 2020-08-18 | 2020-12-04 | 南京军平机械制造有限公司 | Machining process for machining cutter |
| CN112276500A (en) * | 2020-10-20 | 2021-01-29 | 贵州群建精密机械有限公司 | Method for processing small-modulus sector worm gear |
-
2014
- 2014-11-26 CN CN201410688417.1A patent/CN105624691A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106521402A (en) * | 2016-11-29 | 2017-03-22 | 金川集团股份有限公司 | Whole heat treatment method for 23CrNi3MoA hollow steel rock drill rod |
| CN112025231A (en) * | 2020-08-18 | 2020-12-04 | 南京军平机械制造有限公司 | Machining process for machining cutter |
| CN112025231B (en) * | 2020-08-18 | 2022-08-23 | 南京军平机械制造有限公司 | Machining process for machining cutter |
| CN112276500A (en) * | 2020-10-20 | 2021-01-29 | 贵州群建精密机械有限公司 | Method for processing small-modulus sector worm gear |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160601 |