CN103866105B - A kind of Medium Carbon Steel Gear thermal treatment process - Google Patents
A kind of Medium Carbon Steel Gear thermal treatment process Download PDFInfo
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- CN103866105B CN103866105B CN201410082954.1A CN201410082954A CN103866105B CN 103866105 B CN103866105 B CN 103866105B CN 201410082954 A CN201410082954 A CN 201410082954A CN 103866105 B CN103866105 B CN 103866105B
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- 238000007669 thermal treatment Methods 0.000 title claims abstract description 15
- 229910000954 Medium-carbon steel Inorganic materials 0.000 title claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 48
- 238000010791 quenching Methods 0.000 claims abstract description 32
- 230000006698 induction Effects 0.000 claims abstract description 28
- 230000000171 quenching effect Effects 0.000 claims abstract description 27
- 238000005496 tempering Methods 0.000 claims abstract description 25
- 239000003607 modifier Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000000839 emulsion Substances 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 5
- 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
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 229910001566 austenite Inorganic materials 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000003750 conditioning effect Effects 0.000 abstract description 2
- 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
- 238000005516 engineering process Methods 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000004093 laser heating Methods 0.000 description 1
- 102200082816 rs34868397 Human genes 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The present invention relates to mechanical manufacturing field, specifically a kind of gear manufacture thermal treatment process.A kind of Medium Carbon Steel Gear thermal treatment process, this technique comprises following step: the first step, modifier treatment; Second step, high-frequency induction hardening; 3rd step, tempering.The beneficial effect of a kind of Medium Carbon Steel Gear thermal treatment process of the present invention is: before high-frequency quenching, carry out modifier treatment, be equivalent to conditioning heat treatment, to adapt to the requirement of rapid heating and uniform austenitic.Improve the heart portion intensity of gear and make textura epidermoidea be easy to be transformed into austenite when ratio-frequency heating.
Description
Technical field
The present invention relates to mechanical manufacturing field, specifically a kind of gear manufacture thermal treatment process.
Background technology
Because rate of heating is fast, the time is short during gear high-frequency induction hardening, only on surface, structural transformation occurs, so amount of distortion is general less, length of common normal change is little, and in reducing trend, hole size generally shrinks.Ratio-frequency heating speed is fast, and always expand stress by compression in heated part, can produce compression distortion when being heated to a certain plastic state.In process of cooling subsequently, length of common normal is shunk, and produces compression to the endoporus do not heated, thus 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 be due to wall thickness larger time, thermal stresses plays a leading role, and surface is stress; When wall thickness reduces, then structural stress plays a leading role gradually, and surface is to tensile stress state transition, and shrinkage reduces; When wall thickness little to certain value time, may be substantially diathermanous, then become and swell.
For the pinion(gear) that modulus is less, more than general employing full-depth tooth induction heating to transformation temperature, then water-spraying control.Although this situation is only teeth portion heating, heat-up time is very short, equally also there is the impact of structural stress and thermal stresses after hardening, and not only teeth 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 heat treatment technique.
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; 3rd step, tempering;
Described modifier treatment comprises heating quenching and high tempering two steps, and described heating quenching is by described gear heating (860 DEG C ~ 880 DEG C) × 2h, quenches after coming out of the stove; Described high tempering is heating (600 DEG C ~ 620 DEG C) × 2h;
Described high-frequency induction hardening adopts full-depth tooth continuous induction hardening, and adopt pure copper annular inductor block, induction heating frequency is 200 ~ 300KHz, and specific power is 3KW/cm2, and inductor block and outside diameter of gear spacing are 2 ~ 3mm;
Described quenching heat-eliminating medium is oil or emulsion; The hydraulic pressure of described oil or emulsion is 0.1 ~ 0.3MPa, liquid temperature 15 ~ 30 DEG C, quench cooled time 5 ~ 15s.
A kind of Medium Carbon Steel Gear thermal treatment process, this technique comprises following step: the first step, modifier treatment; Second step, high-frequency induction hardening; 3rd step, tempering;
Described modifier treatment comprises heating quenching and high tempering two steps, and described heating quenching is by described gear heating (860 DEG C ~ 880 DEG C) × 2h, quenches after coming out of the stove; Described high tempering is heating (600 DEG C ~ 620 DEG C) × 2h;
Described high-frequency induction hardening adopts full-depth tooth heating quenching method simultaneously, ratio-frequency heating frequency 10KHz, power 450KVA;
Described quenching heat-eliminating medium is oil or emulsion; The hydraulic pressure of described oil or emulsion is 0.1 ~ 0.3MPa, liquid temperature 15 ~ 30 DEG C, quench cooled time 5 ~ 15s.
Further, described tempering is tempering in stove (210 DEG C ~ 230 DEG C) × 45min.
Further, 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 heat treatment technique is: before high-frequency quenching, carry out modifier treatment, be equivalent to conditioning heat treatment, to adapt to the requirement of rapid heating and uniform austenitic.Improve the heart portion intensity of gear and make textura epidermoidea be easy to be transformed into austenite when ratio-frequency heating.
Embodiment
embodiment one
Fishing gear gear, material is 45 steel, and modulus is 1mm, modified rear hardness 20 ~ 26HRC, teeth portion surface high frequency induction quenching hardness 48 ~ 52HRC.
Its thermal treatment process comprises following step:
The first step, modifier treatment;
Heating quenching, heating 880 DEG C × 2h, oil quenching after coming out of the stove.
High tempering, heating 620 DEG C × 2h.After modified, hardness 21 ~ 25HRC.
Second step, high-frequency induction hardening; Described high-frequency induction hardening adopts full-depth tooth continuous induction hardening, and adopt pure copper annular inductor block, 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.Quenching medium adopts massfraction to be the emulsion of 10% ~ 15%; The hydraulic pressure of emulsion is 0.1 ~ 0.3MPa, liquid temperature 15 ~ 30 DEG C, 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.
3rd step, tempering, tempering 230 DEG C × 45min in stove.
embodiment two
Ring gear, material is S45C steel, modulus 9mm, and 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, heating 880 DEG C × 2h, oil quenching after coming out of the stove.
High tempering, heating 620 DEG C × 2h.After modified, hardness 21 ~ 25HRC.
Second step, high-frequency induction hardening; Described high-frequency induction hardening adopts full-depth tooth heating method simultaneously, ratio-frequency heating frequency 10KHz, power 450KVA.
Tempering 230 DEG C × 45min in 3rd step, tempering stove.
embodiment three
Spur gear wheel, material is 40Cr steel, modulus 5mm, and teeth portion high-frequency induction hardening, tempered-hardness are 48 ~ 52HRC.
Its thermal treatment process is:
The first step, modified heating quenching, heating 880 DEG C × 2h, oil quenching after coming out of the stove.
High tempering, heating 620 DEG C × 2h.After modified, hardness 21 ~ 25HRC.
Second step, high-frequency induction hardening, gear high-frequency induction hardening adopts 100KW induction heating equipment.Single turn ring sensor is adopted 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 massfraction to be the emulsion of 10% ~ 15%;
3rd step, tempering in stove (200 ~ 220) DEG C × 60min.
Claims (4)
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; 3rd step, tempering;
Described modifier treatment comprises heating quenching and high tempering two steps, and described heating quenching is by described gear heating (860 DEG C ~ 880 DEG C) × 2h, quenches after coming out of the stove; Described high tempering is heating (600 DEG C ~ 620 DEG C) × 2h;
Described high-frequency induction hardening adopts full-depth tooth continuous induction hardening, and adopt pure copper annular inductor block, 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 quenching heat-eliminating medium is oil or emulsion; The hydraulic pressure of described oil or emulsion is 0.1 ~ 0.3MPa, liquid temperature 15 ~ 30 DEG C, quench cooled time 5 ~ 15s.
2. 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; 3rd step, tempering;
Described modifier treatment comprises heating quenching and high tempering two steps, and described heating quenching is by described gear heating (860 DEG C ~ 880 DEG C) × 2h, quenches after coming out of the stove; Described high tempering is heating (600 DEG C ~ 620 DEG C) × 2h;
Described high-frequency induction hardening adopts full-depth tooth heating quenching method simultaneously, ratio-frequency heating frequency 10KHz, power 450KVA;
Described quenching heat-eliminating medium is oil or emulsion; The hydraulic pressure of described oil or emulsion is 0.1 ~ 0.3MPa, liquid temperature 15 ~ 30 DEG C, quench cooled time 5 ~ 15s.
3. a kind of Medium Carbon Steel Gear thermal treatment process according to claim 1, is characterized in that, described tempering is tempering in stove (210 DEG C ~ 230 DEG C) × 45min.
4. a kind of Medium Carbon Steel Gear thermal treatment process according to claim 1, is characterized in that, the massfraction of described emulsion is 10% ~ 15%.
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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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| CN201410082954.1A CN103866105B (en) | 2014-03-10 | 2014-03-10 | A kind of Medium Carbon Steel Gear thermal treatment process |
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| CN103866105B true CN103866105B (en) | 2016-03-30 |
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| 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 (7)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130248058A1 (en) * | 2012-03-20 | 2013-09-26 | Brunswick Corporation | Heat Treatment Process for Engine Ring Gear |
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2014
- 2014-03-10 CN CN201410082954.1A patent/CN103866105B/en active Active
Patent Citations (7)
| 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 |
| 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 |
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