CN104357796B - The carburizing quenching process of automobile gear - Google Patents
The carburizing quenching process of automobile gear Download PDFInfo
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- CN104357796B CN104357796B CN201410682009.5A CN201410682009A CN104357796B CN 104357796 B CN104357796 B CN 104357796B CN 201410682009 A CN201410682009 A CN 201410682009A CN 104357796 B CN104357796 B CN 104357796B
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- kerosene
- automobile gear
- furnace
- temperature
- carburizing
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- 238000010791 quenching Methods 0.000 title claims abstract description 35
- 230000000171 quenching effect Effects 0.000 title claims abstract description 35
- 238000005255 carburizing Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000009792 diffusion process Methods 0.000 claims abstract description 11
- 238000009413 insulation Methods 0.000 claims abstract description 11
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 72
- 239000003350 kerosene Substances 0.000 claims description 47
- 229910052799 carbon Inorganic materials 0.000 claims description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 12
- 230000003247 decreasing effect Effects 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 238000005496 tempering Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001721 carbon Chemical group 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
nullThe invention provides the carburizing quenching process of a kind of automobile gear，Use pit gas carburizing furnace that automobile gear is carried out Carburization Treatment，Comprise the following steps: a) one-level preheating: after the temperature in stove is gradually increased to 880 ± 5 DEG C, automobile gear is positioned in stove，In-furnace temperature is dropped to 750 ± 5 DEG C，Insulation 30min，The carburizing quenching process of this automobile gear uses and repeats preheating and the mode of diffusion，Automobile gear effective case depth after carburizing finished product is made to reach 1.1～1.2mm，Case hardness is 58～62HRC，Improve the wearability of part、Intensity and fatigue limit，Give full play to the mechanical performance of gear material，And do not produce such as diameter change、Outside circle and the uneven change of endoporus、Plane warping and between cog change in size etc. distort，Ensure that reliability and the service life of automobile gear.
Description
Technical field
The present invention relates to technical field of heat treatment, particularly relate to the carburizing quenching process of a kind of automobile gear.
Background technology
Technology for Heating Processing refers to the overall process of part heat treatment operation, and complete Technology for Heating Processing not only can be excellent
Matter produces qualified product efficiently, improves the service life of product, and can reduce production cost,
Improve the benefit of enterprise.
Thermo-chemical treatment is the Technology that surface alloying is combined with heat treatment phase, it be by metal or
Alloy workpiece is placed in the active medium of uniform temperature insulation, is that one or several elements penetrate into workpiece surface
In, be equipped with different subsequent heat treatment, realize surface peening by surface alloying, improve surface strength,
While hardness, the performance such as wear-resisting, keep the obdurability in heart portion, be that product has higher comprehensive mechanical property
Can, wherein carburizing is to increase the carbon content on steel part top layer and certain carbon profile, being oozed by steel part
Carbon medium heat and is incubated, making carbon atom penetrate into the chemical heat treatment process on top layer.Quenching after carbunse is tempered,
Piece surface hardness can be made to improve, wear-resisting, and good core toughness.
Automobile gear can change interior tissue by carburizing quenching process, improves the wearability of part, intensity
And fatigue limit, give full play to the mechanical performance of gear material, improve the stability of automobile gear and use the longevity
Life, traditional carburizing quenching process for automobile gear, can produce after gear finished product such as diameter change,
Outside circle and the uneven change of endoporus, plane warping and between cog change in size etc. distort, and this has a strong impact on
To the mechanical performance of automobile gear, even cause scrapping of gear.
Summary of the invention
The technical problem to be solved in the present invention is: in order to solve in prior art the carburization process to automobile gear
Such as diameter change, outside circle and the uneven change of endoporus, plane warping can be produced after carburizing after finished product
And the distortion such as between cog change in size, this badly influences the mechanical performance of automobile gear, even causes gear
The problem scrapped, the invention provides the carburizing quenching process of a kind of automobile gear to solve the problems referred to above.
The technical solution adopted for the present invention to solve the technical problems is: the carburizing and quenching work of a kind of automobile gear
Skill, uses pit gas carburizing furnace that automobile gear is carried out Carburization Treatment, comprises the following steps:
A) one-level preheating: after the temperature in stove is gradually increased to 880 ± 5 DEG C, automobile gear is positioned in stove,
In-furnace temperature is dropped to 750 ± 5 DEG C, is incubated 30min；
B) two grades of preheatings: in 80min, in-furnace temperature is gradually increased to 910 ± 5 DEG C, holds in 80min
Continuous instillation methanol, the amount dripping methanol is 170 ± 5/min, persistently drips kerosene in the rear 30min of 80min,
The amount dripping kerosene is 170 ± 5/min；
C) aerofluxus: emptied by furnace air in 35min and persistently drip kerosene, the amount dripping kerosene is
185 ± 5/min；
D) oozing by force: in-furnace temperature rises to 920 ± 5 DEG C, carbon potential is 1.2%Cp, and furnace pressure is 15～20Pa, protects
Temperature 100 ± 10min also drips kerosene, and the amount dripping kerosene is 35/min；
E) one-level diffusion: in-furnace temperature is down to 900 ± 5 DEG C, and carbon potential is 1.03%Cp, and furnace pressure is 10～15Pa,
Insulation 80 ± 5min also drips kerosene, and the amount dripping kerosene is 28/min；
F) two grades of diffusions: in-furnace temperature is down to 880 ± 5 DEG C, carbon potential is 0.82%Cp, and furnace pressure is 10～15Pa,
Insulation 60 ± 5min also drips kerosene, and the amount dripping kerosene is 22/min；
G) pre-cooling: in 100min, in-furnace temperature be gradually decreased to 850 ± 5 DEG C and drip methanol and kerosene, dripping
The amount of kerosene is 15/min, and the amount dripping methanol is 25/min, and carbon potential is 0.8%Cp, and furnace pressure is 10～15Pa,
Being incubated 50min again and drip methanol, the amount dripping methanol is 25/min；
H) quenching: being come out of the stove by automobile gear and carry out oil quenching, the temperature of quenching oil controls at 70 ± 5 DEG C；
I) clean: removing the oil stain on automobile gear surface, rinse liquid temperature controls at 65 ± 5 DEG C；
J) tempering: carry out lonneal, controls in-furnace temperature 165 ± 5 DEG C, and the time is 80～100min；
K) cooling: automobile gear is taken out from stove and carries out air cooling.
As preferably, after described step i) cleans, automobile gear is placed in the environment of 75 ± 10 DEG C and is dried.
As preferably, described quenching oil is quick bright quenc hing oil.
The invention has the beneficial effects as follows, the carburizing quenching process of this automobile gear uses and repeats preheating and diffusion
Mode, make automobile gear effective case depth after carburizing finished product reach 1.1～1.2mm, case hardness
It is 58～62HRC, improves the wearability of part, intensity and fatigue limit, give full play to the machinery of gear material
Performance, and do not produce such as diameter change, outside circle and the uneven change of endoporus, plane warping with
And the distortion such as between cog change in size, it is ensured that the reliability of automobile gear and service life.
Accompanying drawing explanation
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the process curve figure of the optimum embodiment of the carburizing quenching process of automobile gear of the present invention.
Detailed description of the invention
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification,
The basic structure of the present invention is described the most in a schematic way, and therefore it only shows the composition relevant with the present invention.
The invention provides the carburizing quenching process of a kind of automobile gear, use pit gas carburizing furnace to automobile
Transmission gear in change speed gear box carries out Carburization Treatment, and material is 20CrMnTi, comprises the following steps:
A) one-level preheating: after the temperature in stove is gradually increased to 880 ± 5 DEG C, automobile gear is positioned in stove,
In-furnace temperature is dropped to 750 ± 5 DEG C, is incubated 30min；
B) two grades of preheatings: in 80min, in-furnace temperature is gradually increased to 910 ± 5 DEG C, holds in 80min
Continuous instillation methanol, the amount dripping methanol is 170 ± 5/min, persistently drips kerosene in the rear 30min of 80min,
The amount dripping kerosene is 170 ± 5/min；
C) aerofluxus: emptied by furnace air in 35min and persistently drip kerosene, the amount dripping kerosene is
185 ± 5/min；
D) oozing by force: in-furnace temperature rises to 920 ± 5 DEG C, carbon potential is 1.2%Cp, and furnace pressure is 15～20Pa, protects
Temperature 100 ± 10min also drips kerosene, and the amount dripping kerosene is 35/min；
E) one-level diffusion: in-furnace temperature is down to 900 ± 5 DEG C, and carbon potential is 1.03%Cp, and furnace pressure is 10～15Pa,
Insulation 80 ± 5min also drips kerosene, and the amount dripping kerosene is 28/min；
F) two grades of diffusions: in-furnace temperature is down to 880 ± 5 DEG C, carbon potential is 0.82%Cp, and furnace pressure is 10～15Pa,
Insulation 60 ± 5min also drips kerosene, and the amount dripping kerosene is 22/min；
G) pre-cooling: in 100min, in-furnace temperature be gradually decreased to 850 ± 5 DEG C and drip methanol and kerosene, dripping
The amount of kerosene is 15/min, and the amount dripping methanol is 25/min, and carbon potential is 0.8%Cp, and furnace pressure is 10～15Pa,
Being incubated 50min again and drip methanol, the amount dripping methanol is 25/min；
H) quenching: being come out of the stove by automobile gear and carry out oil quenching, the temperature of quenching oil controls at 70 ± 5 DEG C；
I) clean: removing the oil stain on automobile gear surface, rinse liquid temperature controls at 65 ± 5 DEG C；
J) tempering: carry out lonneal, controls in-furnace temperature 165 ± 5 DEG C, and the time is 80～100min；
K) cooling: automobile gear is taken out from stove and carries out air cooling.
After described step i) cleans, automobile gear is placed in the environment of 75 ± 10 DEG C and is dried, described quenching
Oil is quick bright quenc hing oil.
The carburizing quenching process of this automobile gear uses and repeats preheating and the mode of diffusion, makes automobile gear exist
After carburizing finished product, effective case depth reaches 1.1～1.2mm, and case hardness is 58～62HRC, improves zero
The wearability of part, intensity and fatigue limit, give full play to the mechanical performance of gear material, and do not produce
Such as diameter change, outside circle and the uneven change of endoporus, plane warping and between cog change in size etc. are abnormal
Become, it is ensured that the reliability of automobile gear and service life.
In order to further illustrate technical scheme, below in conjunction with embodiment to the present invention side of being preferable to carry out
Case is described, but it is to be understood that these describe simply as further illustrating the features and advantages of the present invention,
Rather than limiting to the claimed invention.
Embodiment
Using pit gas carburizing furnace that the transmission gear in automobile gearbox is carried out Carburization Treatment, material is
20CrMnTi, as it is shown in figure 1, comprise the following steps:
A) one-level preheating: be positioned in stove by automobile gear after the temperature in stove is gradually increased to 880 DEG C, will
In-furnace temperature drops to 750 DEG C, is incubated 30min；
B) two grades of preheatings: in 80min, in-furnace temperature is gradually increased to 910 DEG C, persistently drips in 80min
Entering methanol, the amount dripping methanol is 170/min, persistently drips kerosene in the rear 30min of 80min, drips coal
The amount of oil is 170/min；
C) aerofluxus: emptied by furnace air in 35min and persistently drip kerosene, the amount dripping kerosene is
185/min；
D) oozing by force: in-furnace temperature rises to 920 DEG C, carbon potential is 1.2%Cp, and furnace pressure is 15～20Pa, insulation
100min also drips kerosene, and the amount dripping kerosene is 35/min；
E) one-level diffusion: in-furnace temperature is down to 900 DEG C, and carbon potential is 1.03%Cp, and furnace pressure is 10～15Pa,
Insulation 80min also drips kerosene, and the amount dripping kerosene is 28/min；
F) two grades of diffusions: in-furnace temperature is down to 880 DEG C, carbon potential is 0.82%Cp, and furnace pressure is 10～15Pa,
Insulation 60min also drips kerosene, and the amount dripping kerosene is 22/min；
G) pre-cooling: in 100min, in-furnace temperature be gradually decreased to 850 DEG C and drip methanol and kerosene, dripping kerosene
Amount be 15/min, drip methanol amount be 25/min, carbon potential is 0.8%Cp, and furnace pressure is 10～15Pa,
Being incubated 50min again and drip methanol, the amount dripping methanol is 25/min；
H) quenching: being come out of the stove by automobile gear and carry out oil quenching, the temperature of quenching oil controls at 70 DEG C；
I) clean: removing the oil stain on automobile gear surface, rinse liquid temperature controls at 65 DEG C；
I ') automobile gear is placed in the environment of 75 DEG C it is dried；
J) tempering: carry out lonneal, controls in-furnace temperature 165 DEG C, and the time is 90min；
K) cooling: automobile gear is taken out from stove and carries out air cooling.
Automobile gear after the present embodiment Carburization Treatment is carried out performance measurement, and wherein the degree of depth reaches 1.1mm,
Case hardness is 61.2HRC, and it is 0.03mm that endoporus loses circle, and flank of tooth cydariform amount is 0.01, and distortion degree is described
Minimum, laminating production requirement.
With the above-mentioned desirable embodiment according to the present invention for enlightenment, by above-mentioned description, related work
Personnel can carry out various change and amendment completely in the range of without departing from this invention technological thought.
The content that the technical scope of this invention is not limited in description, it is necessary to according to right
Determine its technical scope.
Claims (3)
1. the carburizing quenching process of an automobile gear, it is characterised in that: use pit gas carburizing furnace to vapour
Skiving wheel carries out Carburization Treatment, comprises the following steps:
A) one-level preheating: after the temperature in stove is gradually increased to 880 ± 5 DEG C, automobile gear is positioned in stove,
In-furnace temperature is dropped to 750 ± 5 DEG C, is incubated 30min；
B) two grades of preheatings: in 80min, in-furnace temperature is gradually increased to 910 ± 5 DEG C, holds in 80min
Continuous instillation methanol, the amount dripping methanol is 170 ± 5/min, persistently drips kerosene in the rear 30min of 80min,
The amount dripping kerosene is 170 ± 5/min；
C) aerofluxus: emptied by furnace air in 35min and persistently drip kerosene, the amount dripping kerosene is
185 ± 5/min；
D) oozing by force: in-furnace temperature rises to 920 ± 5 DEG C, carbon potential is 1.2%Cp, and furnace pressure is 15～20Pa, protects
Temperature 100 ± 10min also drips kerosene, and the amount dripping kerosene is 35/min；
E) one-level diffusion: in-furnace temperature is down to 900 ± 5 DEG C, and carbon potential is 1.03%Cp, and furnace pressure is 10～15Pa,
Insulation 80 ± 5min also drips kerosene, and the amount dripping kerosene is 28/min；
F) two grades of diffusions: in-furnace temperature is down to 880 ± 5 DEG C, carbon potential is 0.82%Cp, and furnace pressure is 10～15Pa,
Insulation 60 ± 5min also drips kerosene, and the amount dripping kerosene is 22/min；
G) pre-cooling: in 100min, in-furnace temperature be gradually decreased to 850 ± 5 DEG C and drip methanol and kerosene, dripping
The amount of kerosene is 15/min, and the amount dripping methanol is 25/min, and carbon potential is 0.8%Cp, and furnace pressure is 10～15Pa,
Being incubated 50min again and drip methanol, the amount dripping methanol is 25/min；
H) quenching: being come out of the stove by automobile gear and carry out oil quenching, the temperature of quenching oil controls at 70 ± 5 DEG C；
I) clean: removing the oil stain on automobile gear surface, rinse liquid temperature controls at 65 ± 5 DEG C；
J) tempering: carry out lonneal, controls in-furnace temperature 165 ± 5 DEG C, and the time is 80～100min；
K) cooling: automobile gear is taken out from stove and carries out air cooling.
2. the carburizing quenching process of automobile gear as claimed in claim 1, it is characterised in that: in described step
After rapid i) cleaning, automobile gear is placed in the environment of 75 ± 10 DEG C and is dried.
3. the carburizing quenching process of automobile gear as claimed in claim 1, it is characterised in that: described quenching
Oil is quick bright quenc hing oil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410682009.5A CN104357796B (en) | 2014-11-24 | 2014-11-24 | The carburizing quenching process of automobile gear |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410682009.5A CN104357796B (en) | 2014-11-24 | 2014-11-24 | The carburizing quenching process of automobile gear |
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| CN104357796A CN104357796A (en) | 2015-02-18 |
| CN104357796B true CN104357796B (en) | 2016-11-23 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104805271A (en) * | 2015-04-28 | 2015-07-29 | 柳州科尔特锻造机械有限公司 | Heat treatment process for automobile gears |
| CN104831291A (en) * | 2015-05-11 | 2015-08-12 | 吴芳吉 | Carburization process for automobile hub |
| CN104831290A (en) * | 2015-05-11 | 2015-08-12 | 柳州金盾机械有限公司 | Carburizing and quenching process of straight-tooth cylindrical gear |
| CN104962700A (en) * | 2015-06-17 | 2015-10-07 | 柳州金特新型耐磨材料股份有限公司 | Wear-resistant material quenching process |
| CN105154633B (en) * | 2015-10-26 | 2018-05-29 | 江苏保捷锻压有限公司 | A kind of rapid carburization heat treatment process of automobile differential drive gear |
| CN105506539A (en) * | 2015-12-10 | 2016-04-20 | 常州天山重工机械有限公司 | Carburizing and quenching process of high-hardness micro carbide on surface of carburizing part |
| CN105483603B (en) * | 2015-12-10 | 2018-02-16 | 常州天山重工机械有限公司 | A kind of Technology for Heating Processing of shallow-layer deep cementing gear hardness gradient |
| CN106756753B (en) * | 2016-12-12 | 2018-10-02 | 中车戚墅堰机车车辆工艺研究所有限公司 | The carburization quenching method of low-speed heavy-loaded gear |
| CN106756754B (en) * | 2016-12-12 | 2019-09-27 | 中车戚墅堰机车车辆工艺研究所有限公司 | The carburization quenching method of automobile gearbox gear |
| CN107356622A (en) * | 2017-05-16 | 2017-11-17 | 沈阳透平机械股份有限公司 | A kind of distortion sample for the test of carburizing and quenching gear deflection |
| CN111394686B (en) * | 2020-04-03 | 2021-12-14 | 南阳浩帆车辆部件有限公司 | Heat treatment method of small module gear |
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| CN102154652A (en) * | 2011-03-11 | 2011-08-17 | 江苏南方轴承股份有限公司 | Medium-deep-layer carburization or carbonitriding thermal processing technology for bearings or clutch parts |
| CN102191364A (en) * | 2011-05-25 | 2011-09-21 | 浙江浦江齿轮有限公司 | Carburizing and quenching process for gear made of alloy steel |
| CN102776471A (en) * | 2012-07-10 | 2012-11-14 | 镇江中船设备有限公司 | Carburizing quenching technology for low-carbon alloy steel parts |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006097096A (en) * | 2004-09-29 | 2006-04-13 | Daido Steel Co Ltd | Bearing steel component subjected to carburizing or carbonitriding |
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2014
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102154652A (en) * | 2011-03-11 | 2011-08-17 | 江苏南方轴承股份有限公司 | Medium-deep-layer carburization or carbonitriding thermal processing technology for bearings or clutch parts |
| CN102191364A (en) * | 2011-05-25 | 2011-09-21 | 浙江浦江齿轮有限公司 | Carburizing and quenching process for gear made of alloy steel |
| CN102776471A (en) * | 2012-07-10 | 2012-11-14 | 镇江中船设备有限公司 | Carburizing quenching technology for low-carbon alloy steel parts |
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