CN103866105A - Thermal treatment process of medium-carbon-steel gear - Google Patents
Thermal treatment process of medium-carbon-steel gear Download PDFInfo
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- CN103866105A CN103866105A CN201410082954.1A CN201410082954A CN103866105A CN 103866105 A CN103866105 A CN 103866105A CN 201410082954 A CN201410082954 A CN 201410082954A CN 103866105 A CN103866105 A CN 103866105A
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- frequency
- tempering
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- 238000007669 thermal treatment Methods 0.000 title claims abstract description 19
- 229910000954 Medium-carbon steel Inorganic materials 0.000 title claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 38
- 238000010791 quenching Methods 0.000 claims abstract description 32
- 230000000171 quenching effect Effects 0.000 claims abstract description 29
- 230000006698 induction Effects 0.000 claims abstract description 22
- 238000005496 tempering Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 9
- 239000000839 emulsion Substances 0.000 claims description 5
- 239000003607 modifier Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910001566 austenite Inorganic materials 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000007670 refining Methods 0.000 abstract 2
- 239000002344 surface layer Substances 0.000 abstract 1
- 230000035882 stress Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000004093 laser heating Methods 0.000 description 1
- 102200082816 rs34868397 Human genes 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Abstract
The invention relates to the field of machine manufacturing and particularly relates to a thermal treatment process of a medium-carbon-steel gear. The process comprises the following steps: (1) thermal refining, (2) high-frequency induction quenching, and (3) tempering. The thermal treatment process of the medium-carbon-steel gear has the beneficial effects that the thermal refining equivalent to preheat treatment is carried out before the high-frequency quenching so as to adapt to the rapid heating and uniform austenitizing requirements; and the strength of a core part of the gear is improved, and surface-layer tissues can be easily converted into austenite in a high-frequency heating process.
Description
Technical field
The present invention relates to mechanical manufacturing field, specifically a kind of gear is manufactured thermal treatment process.
Background technology
When gear high-frequency induction hardening, because rate of heating is fast, the time is short, structural transformation only occurs on surface, so amount of distortion is generally less, length of common normal changes little, is the trend of dwindling, and interior hole dimension generally shrinks.Ratio-frequency heating speed is fast, and the heated part always stress by compression that expands, can produce compression distortion while being heated to a certain plastic state.In process of cooling subsequently, length of common normal is shunk, and the endoporus of not heating is produced to compression, thereby endoporus and external diameter are shunk.Shrinkage is relevant with wall thickness, is generally that the shrinkage at wall thickness place is greater than thin-walled place shrinkage.This is that thermal stresses plays a leading role because wall thickness is when larger, and surface is stress; When wall thickness reduces, structural stress plays a leading role gradually, and surface is to tensile stress state transition, and shrinkage reduces; When wall thickness little when the certain value, may be substantially diathermanous, become and swell.
For the less pinion(gear) of modulus, generally adopt induction heating of full-depth tooth to more than transformation temperature, then spray water cooling.Although this situation is only the heating of tooth portion, heat-up time is very short, equally also has the impact of structural stress and thermal stresses after hardening, and not only tooth portion can produce distortion, and endoporus is also affected.
Summary of the invention
The present invention is directed to above-mentioned technical problem, propose a kind of medium carbon steel fishing gear gear thermal treatment process.
Concrete technology step is: a kind of Medium Carbon Steel Gear thermal treatment process, and this technique comprises following step:
The first step, modifier treatment;
Second step, high-frequency induction hardening;
The 3rd step, tempering.
Described hardening and tempering process comprises heating quenching and two steps of high tempering, and described heating quenching is by 880 DEG C × 2h of described gear heating, oil quenching after coming out of the stove; Described high tempering is 620 DEG C × 2h of heating.
Described high-frequency quenching adopts full-depth tooth continuous induction hardening, adopts pure copper annular inductor block, and induction heating frequency is 200 ~ 300KHz, and specific power is 3KW/cm
2, inductor block and outside diameter of gear spacing are 2 ~ 3mm.
Described induction hardened hydraulic pressure 0.1 ~ 0.3MPa, 15 ~ 30 DEG C of water temperatures, quench cooled time 5 ~ 15s.
Described high-frequency quenching adopts full-depth tooth heating quenching method simultaneously, ratio-frequency heating frequency 10KHz, power 450KVA.
Described tempering is 230 DEG C × 45min of tempering in stove.
Described quenching heat-eliminating medium is oil or emulsion.
The massfraction of described emulsion is 10% ~ 15%.
The beneficial effect of a kind of medium carbon steel fishing gear of the present invention gear thermal treatment process is: before high-frequency quenching, carry out modifier treatment, be equivalent to conditioning heat treatment, to adapt to rapid heating and the evenly requirement of austenitizing.Improve the heart portion intensity of gear and made textura epidermoidea in the time of ratio-frequency heating, be easy to be transformed into austenite.
Embodiment
embodiment mono-
Fishing gear gear, material is 45 steel, modulus is 1mm, modified rear hardness 20 ~ 26HRC, the surface high frequency induction quenching hardness 48 ~ 52HRC of tooth portion.
Its thermal treatment process comprises following step:
The first step, modifier treatment;
Heating quenching, 880 DEG C × 2h of heating, oil quenching after coming out of the stove.
High tempering, 620 DEG C × 2h of heating.After modified, hardness 21 ~ 25HRC.
Second step, high-frequency induction hardening; Described high-frequency quenching adopts full-depth tooth continuous induction hardening, adopts pure copper annular inductor block, and induction heating frequency is 200 ~ 300KHz, and specific power is 3KW/cm
2, inductor block and outside diameter of gear spacing are 2 ~ 3mm.Adopt JBK-302 type quenching machine.Induction hardened hydraulic pressure 0.1 ~ 0.3MPa, 15 ~ 30 DEG C of water temperatures, quench cooled time 5 ~ 15s.
High-frequency induction hardening electrical parameter, frequency 280KHz, anode voltage 9.5KV, anodic current 4 ~ 5A, grid current 0.8A, heat-up time 30s, rotating speed 18.4rs
-1.
The 3rd step, tempering, 230 DEG C × 45min of tempering in stove.
embodiment bis-
Ring gear, material is S45C steel, modulus 9mm, the flank of tooth and tooth root high-frequency induction hardening, its hardness is respectively 500 ~ 660HV and more than 405HV.
Its thermal treatment process comprises following step:
The first step, modifier treatment;
Heating quenching, 880 DEG C × 2h of heating, oil quenching after coming out of the stove.
High tempering, 620 DEG C × 2h of heating.After modified, hardness 21 ~ 25HRC.
Second step, high-frequency induction hardening; Described high-frequency quenching adopts full-depth tooth heating method simultaneously, ratio-frequency heating frequency 10KHz, power 450KVA.
230 DEG C × 45min of tempering in the 3rd step, tempering stove.
embodiment tri-
Spur gear wheel, material is 40Cr steel, modulus 5mm, tooth portion high-frequency induction hardening, tempered-hardness are 48 ~ 52HRC.
Its thermal treatment process is:
The first step, modified heating quenching, 880 DEG C × 2h of heating, oil quenching after coming out of the stove.
High tempering, 620 DEG C × 2h of heating.After modified, hardness 21 ~ 25HRC.
Second step, high-frequency quenching gear high-frequency induction hardening adopt 100KW induction heating equipment.Adopt single turn ring sensor to carry out the quenching of full-depth tooth laser heating.First carry out preheating, its heating schedule is: voltage of supply 380V; Anode voltage 10.7KV; Anodic current 8.9A; Grid current 1.0A; Quenching medium adopts the emulsion that massfraction is 10% ~ 15%;
The 3rd step, tempering in stove (200 ~ 220) DEG C × 60min.
Claims (8)
1. a Medium Carbon Steel Gear thermal treatment process, is characterized in that, this technique comprises following step:
The first step, modifier treatment;
Second step, high-frequency induction hardening;
The 3rd step, tempering.
2. a kind of Medium Carbon Steel Gear thermal treatment process according to claim 1, it is characterized in that, described hardening and tempering process comprises heating quenching and two steps of high tempering, and described heating quenching is by described gear heating (860 DEG C ~ 880 DEG C) × 2h, after coming out of the stove, quenches; Described high tempering is heating (600 DEG C ~ 620 DEG C) × 2h.
3. a kind of Medium Carbon Steel Gear thermal treatment process according to claim 2, is characterized in that, described high-frequency quenching adopts full-depth tooth continuous induction hardening, adopts pure copper annular inductor block, and induction heating frequency is 200 ~ 300KHz, and specific power is 3KW/cm
2, inductor block and outside diameter of gear spacing are 2 ~ 3mm.
4. a kind of Medium Carbon Steel Gear thermal treatment process according to claim 3, is characterized in that, described induction hardened hydraulic pressure 0.1 ~ 0.3MPa, 15 ~ 30 DEG C of water temperatures, quench cooled time 5 ~ 15s.
5. a kind of Medium Carbon Steel Gear thermal treatment process according to claim 2, is characterized in that, described high-frequency quenching adopts full-depth tooth heating quenching method simultaneously, ratio-frequency heating frequency 10KHz, power 450KVA.
6. a kind of Medium Carbon Steel Gear thermal treatment process according to claim 2, is characterized in that, described tempering is tempering in stove (210 DEG C ~ 230 DEG C) × 45min.
7. a kind of Medium Carbon Steel Gear thermal treatment process according to claim 2, is characterized in that, described quenching heat-eliminating medium is oil or emulsion.
8. a kind of Medium Carbon Steel Gear thermal treatment process according to claim 7, is characterized in that, the massfraction of described emulsion is 10% ~ 15%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410082954.1A CN103866105B (en) | 2014-03-10 | 2014-03-10 | A kind of Medium Carbon Steel Gear thermal treatment process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410082954.1A CN103866105B (en) | 2014-03-10 | 2014-03-10 | A kind of Medium Carbon Steel Gear thermal treatment process |
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| CN103866105A true CN103866105A (en) | 2014-06-18 |
| CN103866105B CN103866105B (en) | 2016-03-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107916320A (en) * | 2016-10-09 | 2018-04-17 | 抚顺市鑫盛挖掘机配件制造有限公司 | A kind of quenching technical of size in the 45# round steel crawler belt axis pins of ￠ 36 to ￠ 45 |
Citations (8)
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|---|---|---|---|---|
| US4885831A (en) * | 1988-09-26 | 1989-12-12 | Dana Corporation | Method for forming a contour hardened gear |
| CN101006189A (en) * | 2004-08-18 | 2007-07-25 | 毕晓普创新有限公司 | Method of manufacturing a hardened forged steel component |
| CN101435010A (en) * | 2007-11-15 | 2009-05-20 | 杨国正 | Carring bar intermediate frequency induction hardening heat treatment process and intermediate frequency quenching machine tool |
| CN102029347A (en) * | 2010-12-29 | 2011-04-27 | 中原特钢股份有限公司 | Manufacturing method of gear shaft forge piece for offshore drilling platform |
| CN102605378A (en) * | 2012-01-13 | 2012-07-25 | 浙江吉利汽车研究院有限公司 | Carburizing and quenching method |
| CN102758146A (en) * | 2012-08-01 | 2012-10-31 | 郑州机械研究所 | Alloy material and method for manufacturing open pinion in gasifier by using same |
| CN102952926A (en) * | 2012-10-24 | 2013-03-06 | 荣成锻压机床有限公司 | Thermal refining method of press eccentric body made from 35CrMo |
| US20130248058A1 (en) * | 2012-03-20 | 2013-09-26 | Brunswick Corporation | Heat Treatment Process for Engine Ring Gear |
-
2014
- 2014-03-10 CN CN201410082954.1A patent/CN103866105B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4885831A (en) * | 1988-09-26 | 1989-12-12 | Dana Corporation | Method for forming a contour hardened gear |
| CN101006189A (en) * | 2004-08-18 | 2007-07-25 | 毕晓普创新有限公司 | Method of manufacturing a hardened forged steel component |
| CN101435010A (en) * | 2007-11-15 | 2009-05-20 | 杨国正 | Carring bar intermediate frequency induction hardening heat treatment process and intermediate frequency quenching machine tool |
| CN102029347A (en) * | 2010-12-29 | 2011-04-27 | 中原特钢股份有限公司 | Manufacturing method of gear shaft forge piece for offshore drilling platform |
| CN102605378A (en) * | 2012-01-13 | 2012-07-25 | 浙江吉利汽车研究院有限公司 | Carburizing and quenching method |
| US20130248058A1 (en) * | 2012-03-20 | 2013-09-26 | Brunswick Corporation | Heat Treatment Process for Engine Ring Gear |
| CN102758146A (en) * | 2012-08-01 | 2012-10-31 | 郑州机械研究所 | Alloy material and method for manufacturing open pinion in gasifier by using same |
| CN102952926A (en) * | 2012-10-24 | 2013-03-06 | 荣成锻压机床有限公司 | Thermal refining method of press eccentric body made from 35CrMo |
Non-Patent Citations (2)
| Title |
|---|
| 王荣声等: "《工程材料及机械制造基础》", 31 December 1997, article "四、回火；五、表面淬火", pages: 5-6 * |
| 金荣植: "《齿轮热处理实用技术500问》", 31 January 2012, article "齿轮的调质热处理技术", pages: 50 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107916320A (en) * | 2016-10-09 | 2018-04-17 | 抚顺市鑫盛挖掘机配件制造有限公司 | A kind of quenching technical of size in the 45# round steel crawler belt axis pins of ￠ 36 to ￠ 45 |
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| CN103866105B (en) | 2016-03-30 |
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