CN105695719A - Hardening and tempering process for high-speed gear - Google Patents
Hardening and tempering process for high-speed gear Download PDFInfo
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- CN105695719A CN105695719A CN201410688410.XA CN201410688410A CN105695719A CN 105695719 A CN105695719 A CN 105695719A CN 201410688410 A CN201410688410 A CN 201410688410A CN 105695719 A CN105695719 A CN 105695719A
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- hardening
- tempering process
- tempering
- gear
- speed gear
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Abstract
The invention discloses a hardening and tempering process for a high-speed gear. The hardening and tempering process is characterized by comprising the following steps: 1) charging at 600 to 650 DEG C and heat preservation for 3 h; 2) heating to a quenching temperature of 920 to 930 DEG C and heat preservation for 3 to 4 h; 3) oil quenching to 145 DEG C and taking of the gear out from oil; and 4) tempering at a high temperature of 640 DEG C for 5 to 6 h and air cooling out of a furnace. The high-speed gear treated by using the hardening and tempering process has good strength, high plasticity and substantially improved processing properties.
Description
Technical field
The present invention relates to a kind of high gear hardening and tempering process。
Background technology
Modified it is often referred to quenching+high tempering, to obtain the Technology for Heating Processing of tempered sorbite。Method is namely first quenched, hardening heat: sub-eutectoid steel is Ac3+30 ~ 50 DEG C；Hypereutectoid steel is Ac1+30 ~ 50 DEG C；The comparable carbon steel of steel alloy improves a bit slightly。Tempering is carried out at 500 ~ 650 DEG C after quenching。Modified main purpose is to obtain all reasonable comprehensive mechanical performance of intensity, plasticity。
The workpiece strength that current high gear hardening and tempering process obtains is bad, and plasticity is not high, and processing characteristics is also not fully up to expectations。
Summary of the invention
Because the drawbacks described above of prior art, the technical problem to be solved is to provide a kind of high gear hardening and tempering process, and the high gear intensity after the process of this hardening and tempering process is good, and plasticity is high, and processing characteristics is also obviously improved。
For achieving the above object, the invention provides a kind of high gear hardening and tempering process, it is characterised in that comprise the steps, 1) 600-650 DEG C of shove charge, and it is incubated 3h；
2) hardening heat 920-930 DEG C of insulation 3-4h it is warming up to；
3) oil quenching is fuel-displaced to 145 DEG C；
4) at 640 DEG C of high tempering 5h-6h, air cooling of coming out of the stove。
The invention has the beneficial effects as follows: the gear hardness of its output of the present invention is more uniformly distributed, modified rear Stress Release is more abundant, and deflection is less, can reduce the heat treatment allowance of gear, reduces production cost and processing intensity。
Detailed description of the invention
Embodiment 1:
The technical scheme is that a kind of high gear hardening and tempering process, it is characterised in that comprise the steps, 1) 630 DEG C of shove charges, and it is incubated 3h；
2) hardening heat 920 DEG C insulation 3h it is warming up to；
3) oil quenching is fuel-displaced to 145 DEG C；
4) at 640 DEG C of high tempering 5h-6h, air cooling of coming out of the stove。
The gear hardness of its output of the present invention is more uniformly distributed, and modified rear Stress Release is more abundant, and deflection is less, can reduce the heat treatment allowance of gear, reduces production cost and processing intensity。
Embodiment 2:
The technical scheme is that a kind of high gear hardening and tempering process, it is characterised in that comprise the steps, 1) 620 DEG C of shove charges, and it is incubated 3h；
2) hardening heat 930 DEG C insulation 3h it is warming up to；
3) oil quenching is fuel-displaced to 145 DEG C；
4) at 640 DEG C of high tempering 5h-6h, air cooling of coming out of the stove。
The gear hardness of its output of the present invention is more uniformly distributed, and modified rear Stress Release is more abundant, and deflection is less, can reduce the heat treatment allowance of gear, reduces production cost and processing intensity。
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 high gear hardening and tempering process, it is characterised in that comprise the steps, 1) 600-650 DEG C of shove charge, and it is incubated 3h；
2) hardening heat 920-930 DEG C of insulation 3-4h it is warming up to；
3) oil quenching is fuel-displaced to 145 DEG C；
4) at 640 DEG C of high tempering 5h-6h, air cooling of coming out of the stove。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410688410.XA CN105695719A (en) | 2014-11-26 | 2014-11-26 | Hardening and tempering process for high-speed gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410688410.XA CN105695719A (en) | 2014-11-26 | 2014-11-26 | Hardening and tempering process for high-speed gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105695719A true CN105695719A (en) | 2016-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410688410.XA Pending CN105695719A (en) | 2014-11-26 | 2014-11-26 | Hardening and tempering process for high-speed gear |
Country Status (1)
| Country | Link |
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| CN (1) | CN105695719A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109694951A (en) * | 2017-10-24 | 2019-04-30 | 中车戚墅堰机车车辆工艺研究所有限公司 | A kind of heat treatment method for eliminating the secondary banded structure of gear |
-
2014
- 2014-11-26 CN CN201410688410.XA patent/CN105695719A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109694951A (en) * | 2017-10-24 | 2019-04-30 | 中车戚墅堰机车车辆工艺研究所有限公司 | A kind of heat treatment method for eliminating the secondary banded structure of gear |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160622 |
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| WD01 | Invention patent application deemed withdrawn after publication |