CN105714040A - Gear machining and heat treatment process - Google Patents
Gear machining and heat treatment process Download PDFInfo
- Publication number
- CN105714040A CN105714040A CN201410721220.3A CN201410721220A CN105714040A CN 105714040 A CN105714040 A CN 105714040A CN 201410721220 A CN201410721220 A CN 201410721220A CN 105714040 A CN105714040 A CN 105714040A
- Authority
- CN
- China
- Prior art keywords
- gear
- cooling
- nitriding
- annealing
- normalizing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The present invention discloses a gear machining and heat treatment process, and the gear machining process successively comprises forging, normalizing, quenching and tempering, vertical machining, gear shaping, annealing, vertical machining, gear shaping, vertical milling, stabilizing aging, gear grinding, nitriding and finished product inspection, wherein the step of normalizing is normalizing at (880 +/-10) DEG C for (3-4) h, and then cooling in air; the step of quenching and tempering is quenching and tempering at (850 +/-10) DEG C for (3-4) h, quenching with water, and cooling with oil; the step of the annealing is annealing at (530 +/-10) DEG C for (3-4) h, cooling in a furnace in the heating and cooling rate of less than or equal to 50 DEG C / h; the step of stabilizing aging is stabilizing aging at (510 +/-10) DEG C for (3-4) h, and cooling in the furnace in the heating and cooling rate of less than or equal to 2 5 DEG C / h; and the step of nitriding is nitriding at (510 +/-10) DEG C for (10-12) h, and cooling in the furnace in the heating and cooling rate of less than or equal to 2 5 DEG C / h. The gear machining and heat treatment process is more reasonable, and can reduce distortion after nitriding to improve the overall performance of a gear.
Description
Technical field
The invention belongs to metal heating processing technology field, specifically a kind of Gear Processing and Technology for Heating Processing.
Background technology
Gear Processing flow process: forging → normalizing → modified → vertical car → gear shaping → annealing → vertical car → gear shaping → Vertical Mill → stablize timeliness → roll flute → nitriding → product inspection.Carrying out Nitrizing Treatment technique after roll flute finished product, nitriding is last procedure of gear, it is ensured that the high accuracy grade of gear is it is necessary to strictly control nitriding deformation.And in actual production, the distortion after nitriding is always up perplexing the difficult problem that domestic and international heat treatment produces.Once deformation can not effectively control, reducing the accuracy class of gear, whole gear train assembly can produce impact shock and noise when running, reduce reliability of operation and affect machine life.
Summary of the invention
It is an object of the invention to for Shortcomings part in above-mentioned technology, the present invention provides a kind of Gear Processing and Technology for Heating Processing, and its technique is more reasonable, can reduce the distortion after nitriding, improves gear combination property.
The technical scheme realizing the object of the invention is as follows:
A kind of Gear Processing and Technology for Heating Processing, described Gear Processing flow process is that forging → normalizing → modified → vertical car → gear shaping → annealing → stand car → gear shaping → Vertical Mill → stablize timeliness → roll flute → nitriding → product inspection is characterized in that, described normalizing process is (880 ± 10) DEG C × (3～4) h, air cooling；Described modified operation is (850 ± 10) DEG C × (3～4) h, water quenching and oil-cooling；Described annealing operation is (530 ± 10) DEG C × (3～4) h, and stove is cold, warming and cooling rate≤50 DEG C/h；Described stable aging sequence is (510 ± 10) DEG C × (3-4) h, and stove is cold, warming and cooling rate≤25 DEG C/h；Described nitriding operation is (510 ± 10) DEG C × (10～12) h, and stove is cold, warming and cooling rate≤25 DEG C/h.
A kind of Gear Processing of the present invention and Technology for Heating Processing, it is modified, quenching technical is changed into water quenching and oil-cooling from oil cooling, advantage for subsequent control deformation is: improve the depth of hardening zone of gear, adopting oil cooling technique, gear hobbing backgear only has a tooth top part to be in quench-hardened case, adopts water quenching and oil-cooling technique, the back-geared tooth top of gear hobbing and tooth root, all in quench-hardened case, reduce the deflection caused due to histological difference；Improving gear centre hardness, material at high temperature flow drag improves；Improve temperature, eliminate stress abundant；Anneal and stablize timeliness, increasing before finishing grinding tooth and once stablize Ageing Treatment, reducing the machining stress of gear shaping, corase grind tooth generation；Stress relief annealing creates two advantages: heating-up temperature is low, thermal stress is little；Firing rate is slow, and thermograde is little；These 2 are all conducive to Stress Release and twist cell to reply process slowly, thus deforming reduction；Glow discharge nitriding is entering the stove initial stage, and the temperature difference that each position exists is relatively big, and the position that produced thermal stress is enough to make to take the lead in reaching a high temperature occurs flow to cause deformation.Programming rate and ammonia flow are also the key factors affecting nitriding quality.Control heating, cooling speed≤25 DEG C/h during nitriding, improve the heating uniformity at each position of gear, it is to avoid the deformation that the temperature difference produces thermal stress and causes, adopt new nitridation process, gear matrix strength is improved, and the distortion of glow discharge nitriding gear is effectively controlled.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described:
A kind of Gear Processing and Technology for Heating Processing, described Gear Processing flow process is that forging → normalizing → modified → vertical car → gear shaping → annealing → stand car → gear shaping → Vertical Mill → stablize timeliness → roll flute → nitriding → product inspection is characterized in that, described normalizing process is (880 ± 10) DEG C × (3～4) h, air cooling；Described modified operation is (850 ± 10) DEG C × (3～4) h, water quenching and oil-cooling；Described annealing operation is (530 ± 10) DEG C × (3～4) h, and stove is cold, warming and cooling rate≤50 DEG C/h；Described stable aging sequence is (510 ± 10) DEG C × (3-4) h, and stove is cold, warming and cooling rate≤25 DEG C/h；Described nitriding operation is (510 ± 10) DEG C × (10～12) h, and stove is cold, warming and cooling rate≤25 DEG C/h.
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.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 Gear Processing and Technology for Heating Processing, described Gear Processing flow process is forging → normalizing → modified → vertical car → gear shaping → annealing → stand car → gear shaping → Vertical Mill → stablize timeliness → roll flute → nitriding → product inspection, it is characterized in that, described normalizing process is (880 ± 10) DEG C × (3～4) h, air cooling；Described modified operation is (850 ± 10) DEG C × (3～4) h, water quenching and oil-cooling；Described annealing operation is (530 ± 10) DEG C × (3～4) h, and stove is cold, warming and cooling rate≤50 DEG C/h；Described stable aging sequence is (510 ± 10) DEG C × (3-4) h, and stove is cold, warming and cooling rate≤25 DEG C/h；Described nitriding operation is (510 ± 10) DEG C × (10～12) h, and stove is cold, warming and cooling rate≤25 DEG C/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410721220.3A CN105714040A (en) | 2014-12-03 | 2014-12-03 | Gear machining and heat treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410721220.3A CN105714040A (en) | 2014-12-03 | 2014-12-03 | Gear machining and heat treatment process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105714040A true CN105714040A (en) | 2016-06-29 |
Family
ID=56146376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410721220.3A Pending CN105714040A (en) | 2014-12-03 | 2014-12-03 | Gear machining and heat treatment process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105714040A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106191759A (en) * | 2016-08-23 | 2016-12-07 | 常州新区河海热处理工程有限公司 | Reduce the vacuum glow glow discharge nitriding technique of industrial robot precision gear deformation |
| CN113187719A (en) * | 2021-04-28 | 2021-07-30 | 上海朋泰机械科技有限公司 | Gear ring, pump shaft, machining method of pump shaft and internal gear pump |
-
2014
- 2014-12-03 CN CN201410721220.3A patent/CN105714040A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106191759A (en) * | 2016-08-23 | 2016-12-07 | 常州新区河海热处理工程有限公司 | Reduce the vacuum glow glow discharge nitriding technique of industrial robot precision gear deformation |
| CN113187719A (en) * | 2021-04-28 | 2021-07-30 | 上海朋泰机械科技有限公司 | Gear ring, pump shaft, machining method of pump shaft and internal gear pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101403032B (en) | Thermal treatment process for quick cutting steel composite roll | |
| CN104190828B (en) | The production technology of high residual stress valve spring | |
| CN102560061B (en) | Control method of hollow gear shaft carburization and quenching distortion | |
| CN105132637B (en) | Mould double quenching tempering local strengthening Technology for Heating Processing on hydraulic press 5CrMnMo | |
| CN104498965A (en) | Carburizing and quenching method for cylindrical gear | |
| CN105364433A (en) | Hot-working die production technology | |
| CN101597682A (en) | Process for ultrafining heat-treatment on crystal grains of axle steel | |
| CN105734249A (en) | Method for refining grain size of large 1Cr11Ni2W2MoV shaft forge pieces | |
| CN102952926A (en) | Thermal refining method of press eccentric body made from 35CrMo | |
| CN107442721A (en) | A kind of warm and hot forging technique of mould | |
| CN107190130A (en) | A kind of engine shroud Technology for Heating Processing | |
| CN105714040A (en) | Gear machining and heat treatment process | |
| CN102605160B (en) | Heating processing technology for tooth punching and tempering on open large gear | |
| CN105666074A (en) | Production process for oil pump nozzle | |
| CN105695699A (en) | Micro-deformation vacuum heat treatment process for 40CrNi steel gear | |
| CN103882201A (en) | Rolling process capable of improving hot-upsetting performance of 20 Cr steel | |
| CN103060675A (en) | Annealing-free wire rod for 05-grade high-strength nut and production method of annealing-free wire rod | |
| CN105369022A (en) | Method for carrying out grain refinement on 2Cr12NiMo1W1V forge piece in production process | |
| CN103614521A (en) | Medium carbon steel material large diesel engine output shaft tempering process | |
| CN103643200A (en) | Composite carburization quenching technology for gear | |
| CN105986275A (en) | Method for producing wheel gear by 20CrMnTi carburizing steel | |
| CN106868279A (en) | A kind of elimination 20CrMnTiH residual forging heats isothermal normalizing produces the Technology for Heating Processing of acicular ferrite | |
| CN105369023A (en) | Method for refining grains of 2Cr12NiMo1W1V forge piece | |
| CN103820608A (en) | 35CrMnSi steel and heat treatment method for eliminating second-class temper brittleness and improving toughness of 35CrMnSi steel | |
| CN103834789A (en) | Heat treatment process for gear |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160629 |
|
| WD01 | Invention patent application deemed withdrawn after publication |