CN108977637A - A kind of straight bevel gear surface induction hardening method and its application - Google Patents
A kind of straight bevel gear surface induction hardening method and its application Download PDFInfo
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- CN108977637A CN108977637A CN201810946248.5A CN201810946248A CN108977637A CN 108977637 A CN108977637 A CN 108977637A CN 201810946248 A CN201810946248 A CN 201810946248A CN 108977637 A CN108977637 A CN 108977637A
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- bevel gear
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
- C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
- C21D1/667—Quenching devices for spray quenching
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/32—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention discloses a kind of straight bevel gear surface induction hardening methods comprising following steps: (1) the profiling inductor for being suitble to the whole tooth in straight bevel gear facewidth direction is made of rectangle copper pipe；(2) teeth portion of straight bevel gear is placed in profiling inductor；(3) teeth portion is heated to hardening heat using the intermittent heating；(4) water quenching is quenched to the teeth portion integral spray for being heated to hardening heat；(5) lonneal is to suitable hardness.This method is suitable for mid-frequency induction hardening, high-frequency induction hardening and the superaudio impewdance matching of straight bevel gear, deflection when straight bevel gear impewdance matching can be effectively reduced, the mechanical property for enhancing straight bevel gear makes the tooth face hardness of straight bevel gear and case depth uniformly and will not generate the soft band of quenching.
Description
Technical field
The present invention relates to metal surface quenching technology field more particularly to a kind of straight bevel gear surface induction hardening methods
And its application.
Background technique
The performance of workpiece can be improved in heat treatment, prolongs its service life, surface heating quenching is important heat treatment work
One of skill.Surface heating quenching is that workpiece is heated rapidly to hardening heat, then cooling rapidly, only obtains the superficial layer of workpiece
Obtain the heat treatment method of quenching structure.The parts such as gear, cam work under the alternating loads such as distortion, bending, and bear to rub
And higher stress is born than center portion in impact, surface.Therefore, the surface requirements of part intensity with higher, hardness and
Wearability, center portion requires certain intensity, enough plasticity and toughness, and part can be made to reach using quenching technology for surfaces
The performance requirement tough to this table hard-core.Impewdance matching (induced surface hardening) is common surface heating quenching method,
Gear from the soft flank of tooth into Hardened gear face technology development process, induction hardening process has played important function.Impewdance matching is benefit
The heat for electromagnetic principles such as electromagnetic induction, kelvin effect, vortex and resistance heats, heating workpiece surface quickly, and being quickly cooled down
Treatment process.When impewdance matching, workpiece is placed in inductor made of copper pipe, when the alternating current of certain frequency passes through inductor
When, the workpiece in alternating magnetic field generates induced current, under the action of kelvin effect and vortex, the high density of workpiece surface
The resistance heat that alternating current generates heats rapidly workpiece surface, reaches hardening heat, cooling with quenching water immediately, makes workpiece table
Layer is hardened.Since there is impewdance matching simple process, workpiece to deform small, high production efficiency, energy conservation, low in the pollution of the environment, technique
Process is easily achieved many advantages, such as mechanization and automation, thus is widely used.Induction hardening equipment type is divided into: work
Frequently, low frequency, intermediate frequency, superaudio, high frequency, hyperfrequency induction hardening equipment are several, are selected to be applicable in frequency according to hardening depth needs
Rate.Depth of hardening zone is bigger, and required frequency is lower, conversely, then higher.Impewdance matching is at present with intermediate frequency, superaudio, high frequency, super
Based on high frequency.
Straight bevel gear carries out surface to the lesser straight bevel gear of modulus since the size at its teeth portion both ends is different
The inductor of impewdance matching still uses traditional design method, and carries out Medium frequency induction to the biggish straight bevel gear of modulus and add
When hot, if the working face of inductor has constant gap along cone tooth overall length, the small end of bevel gear teeth portion can be overheated consumingly,
And big end can underheat.To solve this problem, most common method is rule of thumb suitably to increase small splaying
And it is allowed to be greater than big splaying.It is exactly the cone angle for suitably reducing inductor working face there are also another solution, makes it
Less than the cone angle of outside circle, this method, which is actually also equal to, increases small splaying, inhibits small end overheat whereby.It is above two
Solution all has the following disadvantages: that the blindness of 1. inductors production is very big, and accuracy is poor, often to manufacture experimently several inductors
The waste that working hour and material are caused to suitable gap can just be groped；2. it is unstable to quench quality, it is mainly shown as the tooth of bevel gear
Surface hardness and case depth are uneven.In addition, inductor is formed with copper pipe compacting and butt welding, the connection of inductor head
Water flowing part using minimum pipe ф 6mm copper pipe.Through testing, the inductor using ф 6mm copper pipe production below exists
It can be blown from tip when quenching, so the production of tip size is restricted, cause the gap of inductor tip and root portion
Reach 4~5mm, there are biggish soft bands for dedendum flank after teeth portion quenching, and the presence of soft band will lead to gear in transmission process
The flank of tooth is collapsed or broken teeth.The hardness of the flank of tooth is uneven, case depth is uneven and the thin-skinned band of lower tooth is larger is easy to make
At premature component failure.Therefore, the quality for how avoiding the biggish straight bevel gear of modulus from occurring in mid-frequency induction hardening is asked
Topic is always Field of Heat-treatment technical problem in the urgent need to address.
Summary of the invention
It is an object of the invention to solve above-mentioned shortcoming and defect of the existing technology, a kind of straight bevel gear table is provided
Face induction hardening method, this method are suitable for mid-frequency induction hardening, high-frequency induction hardening and the superaudio induction of straight bevel gear
Quenching, can effectively reduce deflection when straight bevel gear impewdance matching, enhance the mechanical property of straight bevel gear, bore straight-tooth
The tooth face hardness and case depth of gear are uniform and will not generate the soft band of quenching.
To solve its technical problem, the technical scheme adopted by the invention is as follows:
A kind of straight bevel gear surface induction hardening method, includes the following steps:
(1) the profiling inductor for being suitble to the whole tooth in straight bevel gear facewidth direction is made of rectangle copper pipe；
(2) teeth portion of straight bevel gear is placed in profiling inductor；
(3) teeth portion is heated to hardening heat using the intermittent heating；
(4) water quenching is quenched to the teeth portion integral spray for being heated to hardening heat；
(5) lonneal is to suitable hardness.
The present inventor improves the surface induction hardening method of straight bevel gear by series further investigation.First
It is to make using rectangle copper pipe and according to the whole tooth profiling of straight bevel gear the profiling inductor being adapted to therewith, in this way, quenching adds
When hot, it is ensured that temperature and hardness of the teeth portion of gear in facewidth direction are uniform, without small end overheat, the big end of teeth portion
The phenomenon that underheat, can also minimize the gap between inductor and tooth root.In conjunction with the heating method of interval, utilize
Heat-conduction principle reduces the temperature difference inside and outside teeth portion, makes entire teeth portion homogeneous heating, so that reaching keeps the temperature of entire teeth portion equal
It is even, the uniform uniform effect of case depth of the hardness of the entire flank of tooth；Meanwhile after quenching, the dedendum flank of teeth portion will not be generated
Soft band.The heating method of interval can also reduce the thermal stress and transformation stress that gear is subject to, to reduce gear shifting quadrant texturing.
Preferably, in step (2), the intermittent heating specifically:
A: being heated to 550 DEG C ± 10 DEG C for teeth portion surface, then stops heating 5~10 seconds, makes surface and the center portion of teeth portion
Temperature it is uniform；
B: teeth portion surface being continued to be heated to 650 DEG C ± 10 DEG C, then stop heating 5~10 seconds, make teeth portion surface and
The temperature of center portion is uniform；
C: continue teeth portion surface to be heated to hardening heat.
For inventor by a large amount of further investigation discoveries, the temperature of heating is larger to the Effect on Mechanical Properties of straight bevel gear,
The too low heat conduction efficiency that will cause of temperature is lower, pre-heat effect is not achieved, temperature is excessively high then can be larger to the generation of the tissue of gear
It influences.And by the temperature heated for the first time control in 550 DEG C of ± 10 DEG C of ranges, the temperature of reheating is controlled at 650 DEG C ± 10 DEG C
Range, in this way, the teeth portion of gear can be made to obtain suitable heat conduction efficiency, pre-heat effect is good, and the temperature difference of intermittent-heating is moderate,
The tissue of gear will not be produced bigger effect, it is good to the quenching effect of gear.
Preferably, in step (3), the quenching, which is taken, quenches mode every tooth.It is of the invention every tooth quenching mode with it is existing
It is identical every tooth quenching technical, the present invention repeats no more.Existing straight bevel gear quenching is typically all to press teeth portion progressive hardening,
And the present invention is identical using the left and right stress state for quench by the way of tooth quenching certifiable gear tooth, reduces stress pair
The influence of gear, to further decrease gear shifting quadrant texturing.
Preferably, in step (4), the temperature of the lonneal is 180 DEG C or more.Preferably, described in step (4)
The number of lonneal is twice, to keep the temperature 3 hours every time.Due to impewdance matching be workpiece surface occur structural transformation, 180 DEG C
The stress generated when quenching can be eliminated to greatest extent while guaranteeing high rigidity by being tempered above and keeping the temperature 3 hours.Temperature is too low
Or the time too short elimination for being all unfavorable for stress, if excessive will cause of residual stress is easy to produce in postorder grinding
Grinding crack；Soaking time is too long, can waste energy consumption.After being tempered for the first time, a part of residual austenite cognition is transformed into geneva
Body generates new stress, and second of tempering can eliminate this part of stress well.
Preferably, in step (1), the medial surface of the profiling inductor offers the hole for water spraying for flash quenching water,
The outer surface of the profiling inductor is equipped with cooling water pipe, and the open end of the profiling inductor is symmetrically welded with two pieces of confluences
Row.Further specifically, the open end of the busbar connector (also referred to as " contact plate ") and the profiling inductor is welded, the confluence
The effect of row is that electric current is made to constitute circuit, is made of copper sheet.
When quenching, quenching water is flowed into from the Single port of rectangle copper pipe, and is sprayed through hole for water spraying, is carried out with the teeth portion to gear
Quenching.And the effect of cooling water pipe is circulation cooling water, to be cooled down to profiling inductor.It can be seen that of the invention is imitative
In shape inductor, cooling water pipe is to be independently arranged, and cooling water and quenching water are independently to separate, in this way, the knot of profiling inductor
Structure and specification size are not limited by cooling water pipe, effectively reduce the gap between inductor and tooth root, will not be quenched
The case where inductor is burnt when fiery.
In addition, the object of the invention is also to provide the application of the straight bevel gear surface induction hardening method, it is described
Straight bevel gear surface induction hardening method is suitable for mid-frequency induction hardening, high-frequency induction hardening and superaudio impewdance matching.It is excellent
Choosing, the straight bevel gear surface induction hardening method is applied to the mid-frequency induction hardening of straight bevel gear.Illustrate hereby, this
Invention is not construed as limiting the material of straight bevel gear, and the straight bevel gear of all suitable surface induction hardenings is all suitable for table of the invention
Face induction hardening method.
Compared with prior art, the invention has the benefit that
1. the present invention makes the profiling inductor being adapted to therewith according to the whole tooth profiling of straight bevel gear using rectangle copper pipe,
When Quench heating, temperature and hardness of the teeth portion of gear in facewidth direction are uniform, are not in the small end overheat of teeth portion, big end adds
Hot insufficient phenomenon.In addition profiling inductor of the invention is equipped with independent cooling water pipe, cooling water and quenching water are independent point
Meter is opened up, the gap between profiling inductor and the tooth root of gear is small, and the structural stability of profiling inductor is good, service life
It is long, it is not easily damaged.
2. the present invention can reduce the temperature difference inside and outside teeth portion using the intermittent heating, make entire teeth portion homogeneous heating, thus
Reaching keeps the temperature of entire teeth portion uniform, and the uniform uniform effect of case depth of the hardness of the entire flank of tooth can also reduce tooth
The thermal stress being subject to and transformation stress are taken turns, to reduce gear shifting quadrant texturing；Simultaneously as between profiling inductor and Gear Root
Gap is small, and after quenching, the dedendum flank of teeth portion will not generate soft band.
3. the present invention quenches the teeth portion of gear using by the way of tooth quenching, make the left and right stress shape of gear tooth
State is identical, influence of the stress to gear is reduced, to further decrease gear shifting quadrant texturing.
Exist in existing straight bevel gear mid-frequency induction hardening method 4. surface induction hardening method of the invention compensates for
Defect, through the method for the present invention quenching processing after straight bevel gear deformation it is small, the hardness and case depth of the flank of tooth are uniform,
The soft band of quenching will not be generated, quenching effect is good.
Detailed description of the invention
Fig. 1 is the process flow chart of straight bevel gear surface induction hardening method of the present invention；
Fig. 2 is the structural schematic diagram of profiling inductor of the present invention；
Fig. 3 is the face the A-A cross-sectional view of Fig. 2；
Fig. 4 is the distribution schematic diagram of the hole for water spraying of profiling inductor of the present invention.
In figure, profiling inductor 1, hole for water spraying 2, cooling water pipe 3, busbar connector 4.
Specific embodiment
Embodiment 1
A kind of profiling inductor for straight bevel gear surface induction hardening, as shown in Figures 2 to 4, the profiling sense
Answering device 1 is to be made using rectangle copper pipe and according to the whole tooth profiling in straight bevel gear facewidth direction, bores tooth with straight-tooth
The whole tooth of wheel is adapted to fitting.In addition, the medial surface of the profiling inductor 1 is uniformly provided with the hole for water spraying for flash quenching water
2, the outer surface soldering of the profiling inductor 1 has cooling water pipe 3, and the open end two sides of the profiling inductor are symmetrically welded with
Two pieces of busbar connectors 4, busbar connector 4 are made of copper sheet.
In use, profiling inductor 1 to be placed on to the teeth portion of straight bevel gear.When quenching, water is quenched from the one of rectangle copper pipe
Port flows into, and sprays through hole for water spraying 2, is quenched with the teeth portion to gear.The effect of cooling water pipe 3 is circulation cooling water,
To be cooled down to profiling inductor 1.Cooling water pipe is to be independently arranged, and cooling water and quenching water are independently to separate, in this way, profiling
The structure and specification size of inductor 1 are not limited by cooling water pipe, effectively reduce the gap between inductor and tooth root,
The case where inductor is burnt when being not in quenching.
Embodiment 2
The mid-frequency induction hardening task for a collection of straight bevel gear that certain client forms a complete production network was accepted by my company, specifically such as
Under:
Straight bevel gear material be 42CrMo, quenching and tempering hardness be 229~277HBW, big end modulus m:14mm, tooth number Z: 55,
The facewidth: 105mm.
Mid-frequency induction hardening technical requirements: 55~60HRC of tooth face hardness, case depth >=3.0mm, martensitic structure: 4
~6 grades.
The mid-frequency induction hardening technology of this batch of straight bevel gear is as follows:
1. pressing the profiling sensor structure of embodiment 1, is made of the rectangle copper pipe of 14 × 4mm and be suitble to the straight bevel gear facewidth
The profiling inductor of the whole tooth in direction, the cooling water pipe of profiling inductor outer surface soldering are the copper pipe of ф 6mm；
2. profiling inductor to be placed on to the teeth portion of straight bevel gear；
3. teeth portion surface is heated to 550 DEG C ± 10 DEG C；
4. stopping heating 5~10 seconds, keep teeth portion surface and center portion temperature uniform；
5. teeth portion surface is continued to be heated to 650 DEG C of ± 10 DEG C of preheatings；
6. stopping heating 5~8 seconds, keep teeth portion surface and center portion temperature uniform；
7. teeth portion surface is continued to be heated to 850 DEG C ± 10 DEG C, and make to open the quenching whole tooth of water after entire teeth portion temperature is uniform
Quenching, using the quenching mode every tooth when quenching；
8. twice with 220 DEG C of tempering, keeping the temperature 3 hours every time.
In the present embodiment, the 42CrMo material that selection quenching and tempering hardness is similarly 229~277HBW does mid-frequency induction hardening
Tooth is tested, the size for testing tooth is identical with straight bevel gear teeth portion size, and gear is quenched-is tempered simultaneously, is then carried out
Destructive test.It tests respectively in three teeth portion big end, middle part, small end position interception samples, obtained technical parameter is such as
Under:
1. hardness:
2. case depth:
3. metallographic structure: big end, middle-end, the tempered martensite at three positions of small end are identical, press " the Chinese people
Republic's machinery industry standard " JB/T9204-1999 can be chosen as 5 grades.
By detecting above, indices reach customer requirement.
It can be seen that being quenched in actual production using straight bevel gear surface induction hardening method of the invention bevel gear intermediate frequency
Fire is more accurate, and the hardness of entire teeth portion, case depth are uniform after quenching, and martensitic structure is identical, and user's reflection makes
It is very good with effect.
Embodiment 3
The mating bevel gear wheel of PXZ1500 Hydraulic crushers that certain client is used for a long time relies on import for a long time.Bore tooth
Wheel material be 40Cr, 250~280HBW of quenching and tempering hardness, big end modulus m:30mm, steamboat tooth number Z: 26, bull wheel tooth number Z: 77, tooth
It is wide: 310mm.
Mid frequency induction hardening technical requirements: 53~55HRC of tooth face hardness, case depth >=2.5mm.
It is as follows to the mid-frequency induction hardening technology of the bevel gear:
1. pressing the profiling sensor structure of embodiment 1, is made of the rectangle copper pipe of 14 × 4mm and be suitble to the straight bevel gear facewidth
The profiling inductor of the whole tooth in direction, the cooling water pipe of profiling inductor outer surface soldering are the copper pipe of ф 6mm；
2. profiling inductor to be placed on to the teeth portion of straight bevel gear；
3. the teeth portion surface of straight bevel gear is heated to 550 DEG C ± 10 DEG C；
4. stopping heating 5~10 seconds, keep teeth portion surface and center portion temperature uniform；
5. teeth portion surface is continued to be heated to 650 DEG C of ± 10 DEG C of preheatings；
6. stopping heating 5~8 seconds, keep teeth portion surface and center portion temperature uniform；
7. teeth portion surface is continued to be heated to 850 DEG C ± 10 DEG C, and make to open the quenching whole tooth of water after entire teeth portion temperature is uniform
Quenching, using the quenching mode every tooth when quenching；
8. twice with 350 DEG C of tempering, keeping the temperature 3 hours every time
In the present embodiment, as follows to the technical parameter obtained after above-mentioned bevel gear mid-frequency induction hardening:
1. surface hardness: 53~55HRC；
2. case depth are as follows: 2.8mm.
Above-mentioned technical parameter complies fully with the requirement of bevel gear heat treatment technics.
This client wanted to use production domesticization import substitutes, exist in the gear of other factory's mid frequency induction hardenings for save the cost originally
Use process early stage will appear flank of tooth be collapsed and broken teeth phenomenon, and analysis reason is precisely due to quenching hardness is uneven, hardened-depth
It is shallow that difference is larger, there are caused by larger soft band.And utilize the tooth of straight bevel gear surface induction hardening method of the present invention quenching
The phenomenon that wheel does not find initial failure, using effect is very good, completely instead of import gear, produces huge economic effect
Benefit.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention rather than protects to the present invention
The limitation of range is protected, although the invention is described in detail with reference to the preferred embodiments, those skilled in the art should
Understand, it can be with modification or equivalent replacement of the technical solution of the present invention are made, without departing from the essence of technical solution of the present invention
And range.
Claims (9)
1. a kind of straight bevel gear surface induction hardening method, which comprises the steps of:
(1) the profiling inductor for being suitble to the whole tooth in straight bevel gear facewidth direction is made of rectangle copper pipe；
(2) teeth portion of straight bevel gear is placed in profiling inductor；
(3) teeth portion is heated to hardening heat using the intermittent heating；
(4) water quenching is quenched to the teeth portion integral spray for being heated to hardening heat；
(5) lonneal is to suitable hardness.
2. straight bevel gear surface induction hardening method as described in claim 1, which is characterized in that in step (2), between described
It has a rest heating method specifically:
A: being heated to 550 DEG C ± 10 DEG C for teeth portion surface, then stops heating 5~10 seconds；
B: teeth portion surface being continued to be heated to 650 DEG C ± 10 DEG C, then stops heating 5~10 seconds；
C: continue teeth portion surface to be heated to hardening heat.
3. straight bevel gear surface induction hardening method as described in claim 1, which is characterized in that described to quench in step (3)
Fire, which is taken, quenches mode every tooth.
4. straight bevel gear surface induction hardening method as described in claim 1, which is characterized in that described low in step (4)
The temperature of temperature tempering is 180 DEG C or more.
5. straight bevel gear surface induction hardening method as claimed in claim 4, which is characterized in that described low in step (4)
The number of temperature tempering is twice, to keep the temperature 3 hours every time.
6. straight bevel gear surface induction hardening method as described in claim 1, which is characterized in that the profiling inductor
Medial surface offers the hole for water spraying for flash quenching water.
7. straight bevel gear surface induction hardening method as claimed in claim 6, which is characterized in that described imitative in step (1)
The outer surface of shape inductor is equipped with cooling water pipe.
8. straight bevel gear surface induction hardening method as claimed in claim 7, which is characterized in that described imitative in step (1)
The open end of shape inductor is symmetrically welded with two pieces of busbar connectors.
9. straight bevel gear surface induction hardening method as described in any one of claims 1 to 8 is in mid-frequency induction hardening, high frequency
Application in impewdance matching and superaudio impewdance matching.
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| CN110030362A (en) * | 2018-12-24 | 2019-07-19 | 南京儒一航空机械装备有限公司 | A kind of straight bevel gear and manufacturing process |
| CN111334656A (en) * | 2018-12-19 | 2020-06-26 | 通用汽车环球科技运作有限责任公司 | Method for thermal processing with a gradient temperature profile |
| CN111926168A (en) * | 2020-09-03 | 2020-11-13 | 山东大众机械制造股份有限公司 | Heat treatment process for driving wheel |
| CN112813231A (en) * | 2021-01-04 | 2021-05-18 | 中车齐齐哈尔车辆有限公司 | Coupler pin hole quenching inductor and coupler pin hole quenching process |
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| CN111926168A (en) * | 2020-09-03 | 2020-11-13 | 山东大众机械制造股份有限公司 | Heat treatment process for driving wheel |
| CN112813231A (en) * | 2021-01-04 | 2021-05-18 | 中车齐齐哈尔车辆有限公司 | Coupler pin hole quenching inductor and coupler pin hole quenching process |
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