CN107937922A - A kind of impervious carbon distorsion during quenching control method of large scale double helical gear - Google Patents
A kind of impervious carbon distorsion during quenching control method of large scale double helical gear Download PDFInfo
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- CN107937922A CN107937922A CN201711404003.1A CN201711404003A CN107937922A CN 107937922 A CN107937922 A CN 107937922A CN 201711404003 A CN201711404003 A CN 201711404003A CN 107937922 A CN107937922 A CN 107937922A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F17/00—Multi-step processes for surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by subclass C21D or C22F or class C25
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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
- C21D1/78—Combined heat-treatments not provided for above
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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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
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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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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/20—Carburising
- C23C8/22—Carburising of ferrous surfaces
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Abstract
The present invention provides a kind of control method of the impervious carbon distorsion during quenching of large scale double helical gear, the control method of the impervious carbon distorsion during quenching is that existing carburizing and quenching frock is improved to supported at three point frock, and before quenching shove charge after carburization, the top and bottom of gear are exchanged, and the microstructure examination after conditioning treatment and the improvement of carburizing quenching process parameter.The control method of above-mentioned impervious carbon distorsion during quenching is used for the double word carburizing and quenching gear of turbocompressor large scale.The carburizing and quenching gear of the impervious carbon distorsion during quenching control method control of the present invention, the deflection of whole carburizing and quenching process is set to reduce more than 50%, the significantly reduction of gear shifting quadrant texturing amount, also greatly improve the quality of gear, contact fatigue strength and flexural fatigue greatly improve, stock removal reduces, and cost declines to a great extent.
Description
Technical field
The present invention relates to gear heat treatment technical field, more particularly to a kind of anti-carburizing and quenching of large scale double helical gear
Aberration control method.
Background technology
At present, the carburizing and quenching amount of distortion of large scale double helical gear is very big, often because deflection is big after carburizing and quenching,
Inadequate processing dimension is reprocessed, and reprocesses save not come, and situation about finally scrapping also occurs often, is one manufactured
Big difficult point, not only influences manufacturing cycle, and manufacture cost also greatly improves.
Carburizing and quenching deformation is global problem, and the data that developed country announces, waste in carburizing and quenching problem on deformation
Fund be quite surprising.Currently to the carburizing and quenching aberration problems of large scale double helical gear, focus mostly on to the gear that distorts
Case hardness test analysis, judge whether to use, subsequent treatment carried out for aberration problems, and by rule of thumb pair can
Energy Producing reason is analyzed, and is taken some restricted controls, was not carried out simulation test research, to carburizing and quenching work
The aberration problems of skill process are never controlled effectively.
The content of the invention
The object of the present invention is to provide a kind of impervious carbon distorsion during quenching control method of large scale double helical gear, to solve
The aberration problems of large scale double helical gear carburizing and quenching.
A kind of in order to solve the above technical problems, impervious carbon distorsion during quenching control the present invention provides large scale double helical gear
Method processed, the carburizing and quenching shove charge of the gear supports the gear using supported at three point frock, in the gear quenching shove charge
Before, quenched again after the top and bottom of the gear are exchanged.
Further, the ratio of the supported at three point frock top surface area and original supporting tool top surface area is 0.2-
0.5。
Further, the height of three support cylinders of the supported at three point frock is the 1.5-2.5 of the gear thickness
Times.
Further, the top and bottom exchange method of the gear is, during carburizing shove charge, is done in the upper surface of the gear
Mark, after the completion of carburization process when quench shove charge, will do markd upper surface and translate into following carrying out quenching shove charge again.
Further, the upper and lower surface keeping parallelism of the supported at three point frock, and carburizing and quenching shove charge when institute
State the lower surface of supported at three point frock and the furnace bottom supporting surface flat contact of carburizing glowing furnace.
Further, the conditioning treatment technique of the gear is：950 DEG C of normalizings, soaking time for " effective thickness/
It is 45mm " hours, air-cooled；860 DEG C of quenchings, soaking time is " effective thickness/40mm " hours, oil cooling；650 DEG C of tempering, during insulation
Between be " 1.5 times of Quenching Soaking Times ", it is air-cooled, carry out microstructure examination, grain size control between 5-7 grades
Preferably, the grain size control is at 6 grades.
Further, the carburizing quenching process of the gear is：930 DEG C of carburizings, programming rate control 70-90 DEG C/it is small
When, stopped respectively when temperature rises to 650 DEG C and 850 DEG C 2 it is small when after be further continued for heating up, the carbon-potential control for oozing the stage by force exists
Between 1.0-1.05%, total soaking time is " depth of penetration/0.1mm " hours；850 DEG C of nodularization air quenchings, soaking time is " effectively
Thickness/40mm " hours；650 DEG C of high temperings, soaking time are 1.5 times of Quenching Soaking Time；780-820 DEG C of quenching, insulation
Time for " effective thickness/40mm " hours, during oil cooling, quenching oil to shift to an earlier date 5-8 it is small when heating heating, Oil-temperature control is in 80-90
Between DEG C, stirring is carried out at the same time, stops stirring within 10-20 minutes before gear oil inlet, oil inlet restarts stirring again after 30 seconds；180
DEG C tempering, soaking time is 2 times of Quenching Soaking Time.
Further, when the gear material is 12Cr2Ni4 carburizing and quenching steel, chemical composition meets GB/T3077-1999
The regulation of standard；When the gear material is 18CrNiMo7-6 steel, chemical composition meets European standard, and " EN10084-2008 oozes
The regulation of carbon steel delivery technical conditions "；When the gear material is 17CrNiMo6 steel, chemical composition meets " DIN 17210-
The regulation of 1986 case-hardened steels supply of material technical conditions ".
Further, suitable for the double word carburizing and quenching gear of turbocompressor large scale.
The impervious carbon distorsion during quenching control method of large scale double helical gear provided by the invention, fills in gear carburizing quenching
Using supported at three point frock support gear during stove, and before gear quenching shove charge, the top and bottom of gear are exchanged, are then carried out again
Quenching process, can be such that the amount of distortion of whole carburizing and quenching process significantly reduces, control or solve the dimension overproof caused by distortion
The problems such as reprocessing, even scrap, solve during due to roll flute stock removal it is big and caused by the serious uneven, hardness of infiltration layer seriously not
The problems such as uniformly and bearing capacity declines；It can greatly improve the quality of gear, contact fatigue strength and flexural fatigue are big
Width improves, and manufacture cost declines to a great extent.
Brief description of the drawings
Test in the impervious carbon distorsion during quenching control method of Fig. 1 large scale double helical gears provided in an embodiment of the present invention
Experiment simulation gear side view.
Test in the impervious carbon distorsion during quenching control method of Fig. 2 large scale double helical gears provided in an embodiment of the present invention
Experiment simulation gear top view.
Used in the impervious carbon distorsion during quenching control method of Fig. 3 large scale double helical gears provided in an embodiment of the present invention
The side view of supported at three point frock.
Used in the impervious carbon distorsion during quenching control method of Fig. 4 large scale double helical gears provided in an embodiment of the present invention
The top view of supported at three point frock.
Used in the impervious carbon distorsion during quenching control method for the large scale double helical gear that Fig. 5 comparative examples of the present invention provide
The side view of original supporting tool.
Used in the impervious carbon distorsion during quenching control method for the large scale double helical gear that Fig. 6 comparative examples of the present invention provide
The top view of original supporting tool.
Embodiment
The present invention provides a kind of impervious carbon distorsion during quenching control method of large scale double helical gear, suitable for turbine pressure
The double word carburizing and quenching gear of contracting machine large scale.This method is from the angle for controlling gear shifting quadrant texturing, to the double double helical tooths of large scale
The carburizing and quenching distortion of wheel is controlled.This method includes：The gear uses supported at three point frock in carburizing and quenching shove charge
The gear is supported, and in the gear before the quenching shove charge after carburization process, by the top and bottom tune of the gear
Change and quenched again.
Wherein, the ratio of the supported at three point frock top surface area and original supporting tool top surface area is 0.2-0.5, with
Reduce the distortion of carburizing process, and ensure the quenching uniformity of quenching process, so as to reduce quenching distortion.Also, described 3 points
Supporting tool, will carry out the calculating of elevated temperature strength, while elevated temperature strength is met, as far as possible reduce supported at three point frock with it is described
The contact area of gear.Meanwhile in order to strengthen stability of the supported at three point frock when supporting gear, the supported at three point frock
The height of three support cylinders be designed as 1.5-2.5 times of the gear thickness, the upper surface of supported at three point frock and following table
Face keeping parallelism, the furnace bottom supporting surface water of the lower surface of the supported at three point frock and carburizing glowing furnace in carburizing and quenching shove charge
Flat contact.
Wherein, the top and bottom exchange method of the gear is, during carburizing shove charge, subscript is done in the upper surface of the gear
Note, after the completion of carburization process when quench shove charge, will mark markd upper surface translate into it is following carry out quenching shove charge again, so as to protect
The gear and the support end contact surface of supported at three point frock are upper surface of the gear in carburizing during card quenching.
Also, the conditioning treatment technique of the gear is：950 DEG C of normalizings, soaking time is " effective thickness/45mm " is small
When, it is air-cooled；860 DEG C of quenchings, soaking time is " effective thickness/40mm " hours, oil cooling；650 DEG C of tempering, soaking time are " 1.5
Times Quenching Soaking Time ", it is air-cooled, microstructure examination is carried out, grain size is controlled between 5-7 grades, and grain size is preferably controlled in 6
Level.
The carburizing quenching process of the gear is：930 DEG C of carburizings, programming rate are controlled at 70-90 DEG C/h, work as temperature
Stopped respectively when rising to 650 DEG C and 850 DEG C 2 it is small when after be further continued for heating up, ooze the carbon-potential control in stage by force in 1.0-1.05%
Between, total soaking time is " depth of penetration/0.1mm " hours；850 DEG C of nodularization air quenchings, soaking time are " effective thickness/40mm "
Hour；650 DEG C of high temperings, soaking time are 1.5 times of Quenching Soaking Time；780-820 DEG C of quenching, soaking time are " to have
Imitate thickness/40mm " hours, during oil cooling, quenching oil to shift to an earlier date 5-8 it is small when heating heating, Oil-temperature control is between 80-90 DEG C, together
When be stirred, stop stirring within 10-20 minutes before gear oil inlet, oil inlet restarts stirring again after 30 seconds；180 DEG C of tempering, are protected
The warm time is 2 times of Quenching Soaking Time.
When the gear material is 12Cr2Ni4 carburizing and quenching steel, chemical composition meets the rule of GB/T3077-1999 standards
It is fixed；When the gear material is 18CrNiMo7-6 steel, chemical composition meets European standard, and " EN10084-2008 carburizing steel is delivered goods
The regulation of technical conditions "；When the gear material is 17CrNiMo6 steel, chemical composition meets that " DIN 17210-1986 surfaces are hard
The regulation of change steel supply of material technical conditions ".
The turbocompressor impervious carbon distorsion during quenching control method of large scale double helical gear of the present invention, is being oozed
In the technical process of carbon quenching, the deflection of the double word carburizing and quenching gear of large scale can be made significantly to reduce, can not only be controlled
The problem of being not enough ground when making roll flute big because of deflection, reprocess or even scrap caused by dimension overproof；Also can control due to roll flute
When stock removal it is big, cause the serious uneven of infiltration layer, the problem of hardness declines, and bearing capacity declines；More importantly gear
Quality greatly improve, contact fatigue strength, flexural fatigue greatly improve；In addition stock removal reduces, and cost can also decline to a great extent.
The present invention is suitable for compressor and is controlled with the impervious carbon distorsion during quenching of large scale double helical gear, is also applied for other large scales
The impervious carbon distorsion during quenching control of double helical gear.
Embodiment 1
Gear material 12Cr2Ni4 (chemical composition meets GB/T3077-1999 standards) is simulated, simulates the size ginseng of gear
See Fig. 1 and Fig. 2, carry out the method test of the impervious carbon distorsion during quenching control of double helical gear with it, comprise the following steps：
(1) conditioning treatment：950 DEG C of normalizings, it is air-cooled when insulation 5 is small；860 DEG C of quenchings, when insulation 5 is small, oil cooling, 650 DEG C
Tempering, it is air-cooled when insulation 7.5 is small, and microstructure examination is carried out, grain size is controlled at 6 grades.
(2) carburizing and quenching shove charge：Referring to Fig. 3 and Fig. 4, using supported at three point frock, supported at three point frock top surface area with
The ratio of original supporting tool top surface area is 0.2, and such supported at three point frock is less than original frock with the contact area of gear
With the 40% of tooth contact area；The height of its three support cylinders is higher than 1.5 times of gear thickness；Supported at three point frock needs
The calculating of elevated temperature strength is carried out, while elevated temperature strength is met, reduces its contact area with gear as far as possible.Supported at three point work
Upper and lower contact surface is filled in two parallel planes, and supported at three point work holds contact surface and the supporting surface of furnace bottom keeps water
It is flat；After the completion of carburization process when quenching shove charge, the top and bottom of gear are exchanged, ensure gear and three point branch during quenching
The support end contact surface for supportting frock is upper surface of the gear in carburizing.
(3) carburizing quenching process parameter is used in test：When 930 DEG C of carburizings 10 are small, carbon-potential control rises between 1.0-1.05%
Warm speed control at 80 DEG C/h, stopped respectively when temperature rises to 650 DEG C and 850 DEG C 2 it is small when after be further continued for heating up；Ball
When 850 DEG C of insulations 5 of change air quenching are small；When 650 DEG C of high temperings 7.5 are small；When 780 DEG C of quenching and preserving heats 5 are small, using oil cooling, during oil cooling,
Quenching oil to shift to an earlier date 7 it is small when heating heating, Oil-temperature control is carried out at the same time stirring at 85 DEG C, before gear oil inlet stopping in 20 minutes stir
Mix, oil inlet restarts stirring again after 30 seconds；When 180 DEG C of tempering insulations 10 are small.
Comparative example 1
Difference from Example 1 is：Step (2) uses original supporting tool, and original supporting tool is such as
Shown in Fig. 5 and Fig. 6.
Data process＆analysis：The deformation data of embodiment 1 is shown in Table 1a, and the deformation data of comparative example 1 is shown in Table 1b, its
In, diameter A and diameter B represent orthogonal two diameters on gear, diameter A it is upper with represent gear upper end respectively on diameter B
The measured value in face；The measured value of gear lower face is represented under diameter A and under diameter B.Contrast from experimental test data can
Going out, the ovality deflection after 1 carburizing and quenching of embodiment is zero, and the ovality deflection of comparative example 1 is 0.03 millimeter, therefore,
Ovality deflection of the ovality deformation of embodiment 1 significantly lower than comparative example 1.In addition, from the contrasts of experimental test data also
As can be seen that the taper deformation amount 0.01mm of embodiment 1, the taper deformation amount+0.03mm of comparative example 1, the taper of embodiment 1 becomes
Shape amount reduces 0.02mm compared with the taper deformation amount of comparative example 1, that is, reduces 66.7%.
The deformation data of table 1a, embodiment 1
The deformation data of table 1b, comparative example 1
Embodiment 2
Gear material 12Cr2Ni4 (chemical composition meets GB/T3077-1999 standards) is simulated, simulates the size ginseng of gear
See Fig. 1 and Fig. 2, carry out the method test of the impervious carbon distorsion during quenching control of double helical gear with it, comprise the following steps：
(1) conditioning treatment：950 DEG C of normalizings, it is air-cooled when insulation 5 is small；860 DEG C of quenchings, when insulation 5 is small, oil cooling, 650 DEG C
Tempering, it is air-cooled when insulation 7.5 is small, and microstructure examination is carried out, grain size is controlled at 6 grades.
(2) carburizing and quenching shove charge：Referring to Fig. 3 and Fig. 4, using supported at three point frock, supported at three point frock top surface area with
The ratio of original supporting tool top surface area is 0.35, and such supported at three point frock is less than original frock with the contact area of gear
With the 40% of tooth contact area；The height of its three support cylinders is higher than 1.5 times of gear thickness；Supported at three point frock is passed through
The calculating of elevated temperature strength, the upper and lower contact surface of supported at three point frock is in two parallel planes；When quenching shove charge, gear
Above and below is exchanged, and supported at three point work holds contact surface and the supporting surface holding of furnace bottom is horizontal.
(3) carburizing quenching process parameter is used in test：When 930 DEG C of carburizings 10 are small, carbon-potential control rises between 1.0-1.05%
Warm speed control at 80 DEG C/h, stopped respectively when temperature rises to 650 DEG C and 850 DEG C 2 it is small when after be further continued for heating up；Ball
When 850 DEG C of insulations 5 of change air quenching are small；When 650 DEG C of high temperings 7.5 are small；When 780 DEG C of quenching and preserving heats 5 are small, using oil cooling, during oil cooling,
Quenching oil to shift to an earlier date 7 it is small when heating heating, Oil-temperature control is carried out at the same time stirring at 85 DEG C, before gear oil inlet stopping in 20 minutes stir
Mix, oil inlet restarts stirring again after 30 seconds；When 180 DEG C of tempering insulations 10 are small.
Comparative example 2
Difference from Example 2 is：Step (2) uses original supporting tool, and original supporting tool is such as
Shown in Fig. 5 and Fig. 6.
Data process＆analysis：The deformation data of embodiment 2 is shown in Table 2a, and the deformation data of comparative example 2 is shown in Table 2b, its
In, diameter A and diameter B represent orthogonal two diameters on gear, diameter A it is upper with represent gear upper end respectively on diameter B
The measured value in face；The measured value of gear lower face is represented under diameter A and under diameter B respectively.Contrast from experimental test data can
To find out, the ovality deflection after 2 carburizing and quenching of embodiment is 0.02mm, and the ovality deflection of comparative example 2 is 0.04 milli
Rice, i.e. the ovality deflection of the ovality deformation ratio comparative example 1 of embodiment 1 reduces 50%.In addition, from experimental test number
According to contrast it can also be seen that embodiment 2 taper deformation amount 0.01mm, the taper deformation amount+0.02mm of comparative example 2, implement
The taper deformation amount of example 2 reduces 0.01mm compared with the taper deformation amount of comparative example 2, that is, reduces 50%.
The deformation data of table 2a, embodiment 2
The deformation data of table 2b, comparative example 2
It should be noted last that above embodiment is merely illustrative of the technical solution of the present invention and unrestricted,
Although the present invention is described in detail with reference to example, it will be understood by those of ordinary skill in the art that, can be to the present invention
Technical solution technical scheme is modified or replaced equivalently, without departing from the spirit and scope of technical solution of the present invention, it should all cover
Among scope of the presently claimed invention.
Claims (10)
- A kind of 1. control method of the impervious carbon distorsion during quenching of large scale double helical gear, it is characterised in that：The carburizing of the gear Quench shove charge and the gear is supported using supported at three point frock, before the gear quenching shove charge, by the top and bottom of the gear Quenched again after exchange.
- 2. the control method of the impervious carbon distorsion during quenching of large scale double helical gear as claimed in claim 1, it is characterised in that：Institute It is 0.2-0.5 to state supported at three point frock top surface area and the ratio of original supporting tool top surface area.
- 3. the control method of the impervious carbon distorsion during quenching of large scale double helical gear as claimed in claim 1, it is characterised in that：Institute The height for stating three support cylinders of supported at three point frock is 1.5-2.5 times of the gear thickness.
- 4. the control method of the impervious carbon distorsion during quenching of large scale double helical gear as claimed in claim 1, it is characterised in that：Institute Stating the top and bottom exchange method of gear is, during carburizing shove charge, is marked in the upper surface of the gear, after the completion of carburization process When quenching shove charge, will do markd upper surface translate into below carry out quenching shove charge again.
- 5. the control method of the impervious carbon distorsion during quenching of large scale double helical gear as claimed in claim 1, it is characterised in that：Institute State the upper and lower surface keeping parallelism of supported at three point frock, and during carburizing and quenching shove charge the supported at three point frock following table Face and the furnace bottom supporting surface flat contact of carburizing glowing furnace.
- 6. the control method of the impervious carbon distorsion during quenching of large scale double helical gear as claimed in claim 1, it is characterised in that：Institute The conditioning treatment technique for stating gear is：950 DEG C of normalizings, soaking time for " effective thickness/45mm " hours, it is air-cooled；860 DEG C are quenched Fire, soaking time are " effective thickness/40mm " hours, oil cooling；650 DEG C of tempering, soaking time are " during 1.5 times of quenching and preserving heats Between ", it is air-cooled, microstructure examination is carried out, grain size is controlled between 5-7 grades.
- 7. the control method of the impervious carbon distorsion during quenching of large scale double helical gear as claimed in claim 6, it is characterised in that：Institute Grain size control is stated at 6 grades.
- 8. the control method of the impervious carbon distorsion during quenching of large scale double helical gear as claimed in claim 1, it is characterised in that：Institute The carburizing quenching process for stating gear is：930 DEG C of carburizings, programming rate is controlled at 70-90 DEG C/h, when temperature rises to 650 DEG C Stopped respectively during with 850 DEG C 2 it is small when after be further continued for heating up, ooze the carbon-potential control in stage by force between 1.0-1.05%, total insulation Time is " depth of penetration/0.1mm " hours；850 DEG C of nodularization air quenchings, soaking time are " effective thickness/40mm " hours；650℃ High tempering, soaking time are 1.5 times of Quenching Soaking Time；780-820 DEG C quenching, soaking time for " effective thickness/ 40mm " hours, during oil cooling, quenching oil to shift to an earlier date 5-8 it is small when heating heating, Oil-temperature control is carried out at the same time and stirs between 80-90 DEG C Mix, stop stirring within 10-20 minutes before gear oil inlet, oil inlet restarts stirring again after 30 seconds；180 DEG C of tempering, soaking time are 2 times of Quenching Soaking Time.
- 9. the control method of the impervious carbon distorsion during quenching of large scale double helical gear as claimed in claim 1, it is characterised in that：Institute When to state gear material be 12Cr2Ni4 carburizing and quenching steel, chemical composition meets the regulation of GB/T3077-1999 standards；The gear When material is 18CrNiMo7-6 steel, chemical composition meets European standard " EN10084-2008 carburizing steel delivery technical conditions " Regulation；When the gear material is 17CrNiMo6 steel, chemical composition meets " DIN17210-1986 case-hardened steel supply of material technologies The regulation of condition ".
- 10. such as the control method of the impervious carbon distorsion during quenching of claim 1-9 any one of them large scale double helical gears, it is special Sign is：Suitable for the double word carburizing and quenching gear of turbocompressor large scale.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108823522A (en) * | 2018-07-12 | 2018-11-16 | 中国航发哈尔滨轴承有限公司 | A method of it is modified to steel ball surface using steel ball thermo-chemical treatment special tooling |
| CN108842130A (en) * | 2018-07-12 | 2018-11-20 | 中国航发哈尔滨轴承有限公司 | A method of it is modified to spherical roller surface using spherical roller thermo-chemical treatment special tooling |
| CN108893703A (en) * | 2018-07-12 | 2018-11-27 | 中国航发哈尔滨轴承有限公司 | A method of it is modified to cylindrical roller surface using angular distribution tapered strut tooling |
| CN110343994A (en) * | 2019-08-08 | 2019-10-18 | 常州天山重工机械有限公司 | A kind of micro- aberration control method of flywheel ring gear carburizing and quenching |
| CN112899612A (en) * | 2021-01-20 | 2021-06-04 | 重庆齿轮箱有限责任公司 | Gear carburizing and quenching process |
| CN113699357A (en) * | 2021-09-10 | 2021-11-26 | 贵州群建精密机械有限公司 | Method for controlling carburizing and quenching deformation of thin-wall gear |
| CN114164339A (en) * | 2021-12-16 | 2022-03-11 | 河南中原特钢装备制造有限公司 | Production method for reducing heat treatment deformation of roller |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108823522A (en) * | 2018-07-12 | 2018-11-16 | 中国航发哈尔滨轴承有限公司 | A method of it is modified to steel ball surface using steel ball thermo-chemical treatment special tooling |
| CN108842130A (en) * | 2018-07-12 | 2018-11-20 | 中国航发哈尔滨轴承有限公司 | A method of it is modified to spherical roller surface using spherical roller thermo-chemical treatment special tooling |
| CN108893703A (en) * | 2018-07-12 | 2018-11-27 | 中国航发哈尔滨轴承有限公司 | A method of it is modified to cylindrical roller surface using angular distribution tapered strut tooling |
| CN110343994A (en) * | 2019-08-08 | 2019-10-18 | 常州天山重工机械有限公司 | A kind of micro- aberration control method of flywheel ring gear carburizing and quenching |
| CN110343994B (en) * | 2019-08-08 | 2022-01-11 | 常州天山重工机械有限公司 | Carburizing and quenching micro-distortion control method for flywheel gear ring |
| CN112899612A (en) * | 2021-01-20 | 2021-06-04 | 重庆齿轮箱有限责任公司 | Gear carburizing and quenching process |
| CN112899612B (en) * | 2021-01-20 | 2023-03-17 | 重庆齿轮箱有限责任公司 | Gear carburizing and quenching process |
| CN113699357A (en) * | 2021-09-10 | 2021-11-26 | 贵州群建精密机械有限公司 | Method for controlling carburizing and quenching deformation of thin-wall gear |
| CN114164339A (en) * | 2021-12-16 | 2022-03-11 | 河南中原特钢装备制造有限公司 | Production method for reducing heat treatment deformation of roller |
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