CN107937703A - The conditioning treatment technique of compressor 35CrMoV ionic nitriding gears - Google Patents
The conditioning treatment technique of compressor 35CrMoV ionic nitriding gears Download PDFInfo
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- CN107937703A CN107937703A CN201711058097.1A CN201711058097A CN107937703A CN 107937703 A CN107937703 A CN 107937703A CN 201711058097 A CN201711058097 A CN 201711058097A CN 107937703 A CN107937703 A CN 107937703A
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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
- 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
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
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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
- C23C8/02—Pretreatment of the material to be coated
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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
- C23C8/36—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 using ionised gases, e.g. ionitriding
- C23C8/38—Treatment of ferrous surfaces
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- Mechanical Engineering (AREA)
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- Organic Chemistry (AREA)
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- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Heat Treatment Of Articles (AREA)
- Rolling Contact Bearings (AREA)
Abstract
A kind of conditioning treatment process the present invention provides compressor with 35CrMoV ionic nitriding gears, including improve the technical process such as design, normalized treatment, quenching treatment, temper and the stable processing of roughing figure.Compressor provided by the invention 35CrMoV ionic nitriding conditioning treatment processes, pass through the design of Optimizing Process Parameters, improvement roughing figure, the hardness of 35CrMoV gears is set to reach HB303 341, according to U.S.'s AGMA standards for gears, the yield strength allowable of gear can be made to improve 33.6%, permissible bending stress and improve 10%, allowable contact stress brings up to 3 grades by 2 grades, improves 10% or so, minimum hardened layer requirement reduces 16.7%.The bearing capacity of gear is set significantly to improve, contact fatigue strength and flexural fatigue greatly improve, and can replace the surface Hardening Treatment of part carburizing and quenching gear, avoid the aberration problems of carburizing and quenching gear.
Description
Technical field
The present invention relates to gear heat treatment technical field, more particularly to a kind of compressor 35CrMoV ionic nitriding gears
Conditioning treatment technique.
Background technology
At present, turbine centrifugal compressor is normalizing, quenching, temper with the conditioning treatment technique of 35CrMoV gears,
Center portion performance after processing is yield strength >=735MPa, hardness HB269~302.In order to improve the bearing capacity of gear and tired
In the labor service life, the patent of our applications in 2015, yield strength >=833MPa, hardness HB293~341 are brought up to by center portion performance；
In order to further excavate the potentiality of 35CrMoV materials, suitable for the development of wind turbine technology, by improving and optimizating technological parameter, excellent
Change the design of roughing figure, the hardness of 35CrMoV gears is reached HB303-341, hardness number tends to reach the standard grade, the center portion of pretreatment
Comprehensive mechanical property is more stablized, and the ionic nitriding gear through conditioning treatment of the present invention, can according to U.S.'s AGMA standards for gears
The yield strength allowable of gear is improved 33.6%, permissible bending stress and improve 10%, allowable contact stress brings up to 3 by 2 grades
Level, improves 10% or so, minimum hardened layer requirement reduces 16.7%.The bearing capacity of gear is set significantly to improve, contact fatigue
Intensity and flexural fatigue greatly improve, and can replace the surface Hardening Treatment of part carburizing and quenching gear, avoid carburizing and quenching
The aberration problems of gear, significantly expand the application range of ionic nitriding gear.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of preparation heat of compressor 35CrMoV ionic nitriding gears
Treatment process, to the bearing capacity excavated the potentiality of 35CrMoV materials, improve compressor 35CrMoV ionic nitriding gears.
In order to solve the above technical problems, the present invention provides a kind of preparation of 35CrMoV ionic nitriding gears of compressor
Heat treatment process, comprises the following steps：
The design of roughing figure, mechanical property examination circle is cut in the cylindrical retraction 50-100mm in the side of the gear；
Normalized treatment, 900-910 DEG C of normalizing temperature, furnace temperature is equal to or less than 500 DEG C of shove charges, by no more than per hour
100 DEG C of speed heating, the soaking time of normalizing temperature is by " effective thickness/40mm " hours calculate, then air-cooled, and require to dissipate
Put；
Quenching treatment, 900 DEG C of hardening heat, furnace temperature is equal to or less than 500 DEG C of shove charges, by no more than 100 DEG C per hour
Speed heating, Quenching Soaking Time is by " effective thickness/40mm " hours calculate；Workpiece quenching is come out of the stove to quenching into cooling medium
Transfer time is no more than 30 seconds, and workpiece of the effective thickness less than 80mm uses oil cooling, and 40-80 DEG C of oil cooling temperature, effective thickness exists
For the workpiece of 80mm-130mm using oil cooling is turned after water-based hardening liquid cooling, water-based hardening liquid cooling temperature is water base to quench less than 40 DEG C
The time of fiery liquid cooling is calculated for every 1 millimeter for 1 second by effective thickness, and workpiece of the effective thickness more than 130mm turns oil after using water cooling
Cold, water cooling temperature is less than 40 DEG C, and the water cooling time is calculated for every 1.5 millimeters for 1 second by effective thickness；
Temper, 600 DEG C ± 10 DEG C of temperature, shove charge below 350 DEG C of furnace temperature, by the speed no more than 70 DEG C per hour
Degree heating, soaking time is calculated by " 1.5-2 times of Quenching Soaking Time ", then air-cooled；
Stabilization is handled, stable 570 DEG C for the treatment of temperature, shove charge below 300 DEG C of furnace temperature, by the speed no more than 70 DEG C per hour
Heating, is kept the temperature by the time identical with tempering insulation time, is cooled down and is cooled down with the speed not higher than 50 DEG C per hour, is dropped to
250 DEG C come out of the stove it is air-cooled.
Further, in the quenching treatment, during shove charge, diameter is more than 1000mm or effective thickness more than 130mm's
Workpiece, the levels interval that one layer of workpiece or two workpiece are filled by each pallet are more than 2 times of thickness of workpiece and put.
Further, in the temper, tempering furnace sets agitation fan, the uniformity of furnace temperature is maintained at ± 10 DEG C
In the range of.
Further, chemical composition of the temperature of the temper according to 35CrMoV ionic nitriding gear materials, workpiece
Effective dimensions and volume factor and quenching shove charge situation, adjusted in the range of 600 DEG C ± 10 DEG C.
Further, the stable processing is carried out after the completion of workpiece semifinishing.
Further, the ball hardness number after the 35CrMoV ionic nitridings gear conditioning treatment is HB303~341,
Tensile strength >=900MPa.
Further, the chemical composition of the 35CrMoV ionic nitridings gear material meets GB/T3077-1999 standards
Regulation.
Further, the conditioning treatment technique is suitable for turbine centrifugal compressor 35CrMoV ionic nitriding gears.
The compressor provided by the invention conditioning treatment technique of 35CrMoV ionic nitriding gears, passes through optimize technique
Parameter, the design for improving roughing figure, make the hardness of 35CrMoV gears reach HB303-341, according to U.S. AGMA gear marks
Standard, makes the yield strength allowable of gear improve 33.6%, permissible bending stress and improves 10%, allowable contact stress is by 2 grades of raisings
To 3 grades, 10% or so is improved, minimum hardened layer requirement reduces 16.7%.The bearing capacity of gear is set significantly to improve, contact is tired
Labor intensity and flexural fatigue greatly improve, and can replace the surface Hardening Treatment of part carburizing and quenching gear, avoid carburizing and quench
The aberration problems of fiery gear.The conditioning treatment technique of compressor provided by the invention 35CrMoV ionic nitriding gears, not only
It can be carried out with centrifugal compressor 35CrMoV gears or ring gear, may be also used in other all application 35CrMoV materials
On the workpiece of ionic nitriding heat treatment.
Brief description of the drawings
Fig. 1 is that the ionic nitriding gear mechanical property examination circle of the embodiment of the present invention 1 cuts the location drawing；
Fig. 2 is that the ionic nitriding gear mechanical property examination circle of comparative example 1 of the present invention cuts the location drawing；
Fig. 3 is that the ionic nitriding gear mechanical property examination circle of the embodiment of the present invention 2 cuts the location drawing；
Fig. 4 is that the ionic nitriding gear mechanical property examination circle of comparative example 2 of the present invention cuts the location drawing；
Fig. 5 improves for the yield strength allowable of the gear after conditioning treatment process provided in an embodiment of the present invention
33.6% AGMA standard simplified figures；
Fig. 6 improves for the permissible bending stress of the gear after conditioning treatment process provided in an embodiment of the present invention
The AGMA standard simplified figures of 10-44.9%；
Fig. 7 improves one for the allowable contact stress of the gear after conditioning treatment process provided in an embodiment of the present invention
The AGMA standard simplified figures of a rank；
Fig. 8 reduces for the minimum case depth of the gear after conditioning treatment process provided in an embodiment of the present invention
16.7% AGMA standard simplified figures.
Embodiment
A kind of conditioning treatment technique the invention discloses compressor with 35CrMoV ionic nitriding gears, it is described
The chemical composition of 35CrMoV ionic nitriding gear materials meets the regulation of GB/T3077-1999 standards, be particularly suitable for turbine from
The conditioning treatment of heart compressor 35CrMoV ionic nitriding gears, the technique comprise the following steps：
(1) design of roughing figure, in roughing G- Design, by mechanical property try circle by side top it is cylindrical cut,
It is improved to cut in the cylindrical retraction 50-100mm in side, it is therefore an objective to be further ensured that strong after the conditioning treatment of working gear position
Degree, hardness meet design and the requirement of industrial and mineral.
(2) normalized treatment, 900 DEG C of normalizing temperature, furnace temperature is less than 500 DEG C of shove charges, by the speed not higher than 100 DEG C per hour
Heating, soaking time is by " effective thickness/40mm " hours calculate, then air-cooled, it is desirable to dissipate.
(3) quenching treatment, 900 DEG C of hardening heat, furnace temperature is equal to or less than 500 DEG C of shove charges, by not higher than per hour 100
DEG C speed heating, soaking time is by " effective thickness/40mm " hours calculate, and workpiece of the effective thickness less than 80mm is using oily
It is cold；The workpiece of effective thickness 80mm-150mm is using water-based hardening liquid cooling T1Second (T1Calculated within 1 second for every millimeter by effective thickness) after
Turn oil cooling；Workpiece of the effective thickness more than 150mm uses water cooling T2Second (T2Calculated within 1 second by every millimeter of effective thickness) after turn oil cooling.
Requirement is put in shove charge, and diameter is more than 1000mm, and either each pallet of the effective thickness more than 120mm only fills one layer of workpiece or two
The levels interval of a workpiece is greater than 2 times of thickness of workpiece；
(4) temper, 600 DEG C of temperature, shove charge below 350 DEG C of furnace temperature, by the speed not higher than 70 DEG C per hour
Heating, soaking time is calculated by " 1.5 times of Quenching Soaking Times ", then air-cooled；Also, the temperature uniformity of tempering furnace will ensure
In the range of 10 DEG C of plus-minus.
(5) stablize processing, carry out stablizing processing after semifinishing, 580 DEG C for the treatment of temperature of stabilization, 300 DEG C of furnace temperature with
Lower shove charge, heats up by the speed not higher than 70 DEG C per hour, and soaking time is cooled down with small not higher than every by the soaking time of tempering
When 50 DEG C speed cooling, drop to 250 DEG C come out of the stove it is air-cooled.
Conditioning treatment work with reference to embodiment to compressor provided by the invention with 35CrMoV ionic nitriding gears
Skill elaborates.
Embodiment 1
Turbine centrifugal compressor 35CrMoV ring gear materials, its chemical composition：C:0.34wt%；Si：0.25wt%；Mn：
0.58wt%；Cr：1.09wt%；Mo：0.23wt%；S：0.008wt%；P：0.026wt%；V：0.13wt%；Fe：Surplus.
Ionic nitriding heat treatment is carried out to it, is comprised the following steps：
(1) design of roughing figure, referring to Fig. 1, design is improved by roughing figure, by mechanical property examination circle in gear
The cylindrical retraction 100mm in side is cut, it is therefore an objective to is further ensured that the intensity after the conditioning treatment of working gear position, hardness meet
Design and the requirement of industrial and mineral.
(2) normalized treatment, room temperature shove charge, 500 DEG C are raised to by power, afterwards 100 DEG C of heating on an hourly basis, 900 DEG C of guarantors
When temperature 3.5 is small, coming out of the stove, it is air-cooled to dissipate.
(3) quenching treatment, room temperature shove charge, 500 DEG C are raised to by power, afterwards 100 DEG C of heating on an hourly basis, 900 DEG C of guarantors
When temperature 3.5 is small, then water-based hardening liquid, which cools down 140 seconds, turns oil cooling, levels interval 280mm.
(4) temper, room temperature shove charge, 350 DEG C are raised to by power, afterwards 70 DEG C of heating on an hourly basis, in 600 DEG C of guarantors
Temperature 5.5 is come out of the stove air-cooled when small.Then mechanical properties test is carried out, inspection result is shown in Table 1.
(5) processing is stablized：The speed heating of 300 DEG C of charging temperature, on an hourly basis 70 DEG C, when 570 DEG C of insulations 5.5 are small, stove
It is cold per hour 50 DEG C speed cooling, drop to 200 DEG C come out of the stove it is air-cooled.
Comparative example 1
Difference from Example 1 is：Referring to Fig. 2, in the design of step (1) roughing figure, mechanical property examination circle exists
Side top is cylindrical to be cut；Step (2) requires after coming out of the stove without bulk storage；Step (3) direct oil quenching, does not have levels space requirement.
Then mechanical properties test is carried out, inspection result is shown in Table 2.
From the contrast of the inspection result of Tables 1 and 2 as can be seen that after tested after 1 ionic nitriding of embodiment heat treatment
35CrMoV gears, its center portion mechanical performance index：Yield strength, tensile strength, Brinell hardness, elongation, the contraction percentage of area,
The indexs such as impact absorbing energy than the yield strength of comparative example 1, tensile strength, Brinell hardness, elongation, the contraction percentage of area,
The indexs such as impact absorbing energy are all high.The compressor 35CrMoV ionic nitriding gears that this explanation embodiment of the present invention 1 provides
Conditioning treatment technique, by Optimizing Process Parameters, improve roughing figure design, make the 35CrMoV after conditioning treatment from
The bearing capacity of son nitridation gear significantly improves, contact fatigue strength and flexural fatigue is also even greatly improves.
The mechanical performance data of table 1, embodiment 1
| Numbering | Yield strength | Tensile strength | Elongation percentage | The contraction percentage of area | Ballistic work (J) | HB |
| Embodiment 1 | 865MPa | 997MPa | 17.5 | 64 | 78、72 | 306 |
The mechanical performance data of table 2, comparative example 1
| Numbering | Yield strength | Tensile strength | Elongation percentage | The contraction percentage of area | Ballistic work (J) | HB |
| Comparative example 1 | 842MPa | 962MPa | 17.0 | 66 | 62、72 | 302 |
Embodiment 2
Turbocompressor 35CrMoV gear materials, its chemical composition：C:0.34wt%；Si：0.25wt%；Mn：
0.58wt%；Cr：1.09wt%；Mo：0.23wt%；S：0.008wt%；P：0.026wt%；V：0.13wt%；Fe：Surplus.
Ionic nitriding heat treatment is carried out to it, is comprised the following steps：
(1) design of roughing figure, referring to Fig. 3, design is improved by roughing figure, by mechanical property examination circle in gear
The cylindrical retraction 50mm in side is cut, it is therefore an objective to is further ensured that the intensity after the conditioning treatment of working gear position, hardness meet
Design and the requirement of industrial and mineral.
(2) normalized treatment, room temperature shove charge, 500 DEG C are raised to by power, afterwards 100 DEG C of heating on an hourly basis, 900 DEG C of guarantors
When temperature 3 is small, coming out of the stove, it is air-cooled to dissipate.
(3) quenching treatment, room temperature shove charge, 500 DEG C are raised to by power, afterwards 100 DEG C of heatings on an hourly basis, 900 DEG C of insulations 3
Hour, then water-based hardening liquid, which cools down 120 seconds, turns oil cooling, shove charge levels interval 240mm.
(4) temper, room temperature shove charge, 350 DEG C are raised to by power, afterwards 70 DEG C of heating on an hourly basis, in 600 DEG C of guarantors
Temperature 4.5 is come out of the stove air-cooled when small.Then mechanical properties test is carried out, inspection result is shown in Table 3.
(5) processing is stablized：Stablizing processing is carried out after semifinishing, stablizes 570 DEG C for the treatment of temperature, charging temperature
300 DEG C, on an hourly basis 70 DEG C speed heating, 570 DEG C insulation 4.5 it is small when, furnace cooling per hour 50 DEG C speed cooling, drop to
200 DEG C come out of the stove it is air-cooled.
Comparative example 2
Difference from Example 2 is：Referring to Fig. 4, in the design of step (1) roughing figure, mechanical property examination circle exists
Side top is cylindrical to be cut；Step (2) requires after coming out of the stove without bulk storage；Step (3) direct oil quenching, does not have levels space requirement.
Then mechanical properties test is carried out, inspection result is shown in Table 4.
From the contrast of the inspection result of table 3 and table 4 as can be seen that after tested after 2 ionic nitriding of embodiment heat treatment
35CrMoV gears, its center portion mechanical performance index：Yield strength, tensile strength, Brinell hardness, elongation, the contraction percentage of area,
Impact absorbing energy etc. is all apparently higher than the yield strength of comparative example 2, tensile strength, Brinell hardness, elongation, section shrinkage
The indexs such as rate, impact absorbing energy.The compressor 35CrMoV ionic nitriding gears that this explanation embodiment of the present invention 2 provides
Conditioning treatment technique, by Optimizing Process Parameters, improve roughing figure design, make the 35CrMoV after conditioning treatment from
The bearing capacity of son nitridation gear significantly improves, and contact fatigue strength and flexural fatigue also greatly improve.
The mechanical performance data of table 3, embodiment 2
The mechanical performance data of table 4, comparative example 2
| Numbering | Yield strength | Tensile strength | Elongation percentage | The contraction percentage of area | Ballistic work (J) | HB |
| Comparative example 2 | 833 | 970 | 15.5 | 62 | 47、52 | 293 |
A kind of compressor provided by the invention conditioning treatment technique of 35CrMoV ionic nitriding gears, passes through improvement
Optimizing Process Parameters, the design for optimizing roughing figure, make the hardness of the 35CrMoV gears after conditioning treatment reach HB303-
341, it can be widely applied to turbocompressor ionic nitriding gear or ring gear etc..Referring to Fig. 5, Fig. 6, Fig. 7 and Fig. 8, through this
The 35CrMoV ionic nitriding gears of invention conditioning treatment, according to U.S.'s AGMA standards for gears, make the yield strength allowable of gear
Improve 33.6%, permissible bending stress and improve 10%, allowable contact stress brings up to 3 grades by 2 grades, improves 10% or so, minimum
Case depth requirement can reduce 16.7% so that the bearing capacity of 35CrMoV ionic nitriding gears significantly improves, contact fatigue
Intensity and flexural fatigue greatly improve, and significantly expand the application range of ionic nitriding gear.
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 (8)
1. a kind of compressor conditioning treatment technique of 35CrMoV ionic nitriding gears, it is characterised in that including following step
Suddenly：
Roughing G- Design, mechanical property examination circle is cut in the cylindrical retraction 50-100mm in the side of the gear；
Normalized treatment, 900-910 DEG C of normalizing temperature, furnace temperature is equal to or less than 500 DEG C of shove charges, by no more than 100 DEG C per hour
Speed heating, the soaking time of normalizing temperature is by " effective thickness/40mm " hours calculate, then air-cooled, and require to dissipate；
Quenching treatment, 900 DEG C of hardening heat, furnace temperature is equal to or less than 500 DEG C of shove charges, by the speed no more than 100 DEG C per hour
Degree heating, Quenching Soaking Time is by " effective thickness/40mm " hours calculate；Workpiece quenching is come out of the stove to the transfer quenched into cooling medium
Time is no more than 30 seconds, and workpiece of the effective thickness less than 80mm uses oil cooling, and 40-80 DEG C of oil cooling temperature, effective thickness is in 80mm-
The workpiece of 130mm after water-based hardening liquid cooling using oil cooling is turned, and water-based hardening liquid cooling temperature is less than 40 DEG C, and water-based hardening liquid is cold
But time is calculated for every 1 millimeter for 1 second by effective thickness, and workpiece of the effective thickness more than 130mm turns oil cooling, water cooling after using water cooling
Temperature is less than 40 DEG C, and the water cooling time is calculated for every 1.5 millimeters for 1 second by effective thickness；
Temper, 600 DEG C ± 10 DEG C of temperature, shove charge below 350 DEG C of furnace temperature, by the speed liter no more than 70 DEG C per hour
Temperature, soaking time is calculated by " 1.5-2 times of Quenching Soaking Time ", then air-cooled；
Stabilization is handled, stable 570 DEG C for the treatment of temperature, shove charge below 300 DEG C of furnace temperature, by the speed liter no more than 70 DEG C per hour
Temperature, is kept the temperature by the time identical with tempering insulation time, is cooled down and is cooled down with the speed not higher than 50 DEG C per hour, is dropped to
250 DEG C come out of the stove it is air-cooled.
2. the compressor according to claim 1 conditioning treatment technique of 35CrMoV ionic nitriding gears, its feature exist
In：In the quenching treatment, during shove charge, diameter is more than 1000mm or effective thickness is more than the workpiece of 130mm, by each pallet
The levels interval for filling one layer of workpiece or two workpiece is more than 2 times of thickness of workpiece and puts.
3. the compressor according to claim 1 conditioning treatment technique of 35CrMoV ionic nitriding gears, its feature exist
In：In the temper, tempering furnace sets agitation fan, the uniformity of furnace temperature is maintained in the range of ± 10 DEG C.
4. the compressor according to claim 3 conditioning treatment technique of 35CrMoV ionic nitriding gears, its feature exist
In：The temperature of the temper is according to the chemical composition of 35CrMoV ionic nitriding gear materials, the effective dimensions of workpiece and body
Product coefficient and quenching shove charge situation, adjust in the range of 600 DEG C ± 10 DEG C.
5. the compressor according to claim 1 conditioning treatment technique of 35CrMoV ionic nitriding gears, its feature exist
In：The stable processing is carried out after the completion of workpiece semifinishing.
6. the compressor according to claim 1 conditioning treatment technique of 35CrMoV ionic nitriding gears, its feature exist
In：Ball hardness number after the 35CrMoV ionic nitridings gear conditioning treatment is HB303~341, tensile strength >=
900MPa。
7. the compressor according to claim 1 conditioning treatment technique of 35CrMoV ionic nitriding gears, its feature exist
In：The chemical composition of the 35CrMoV ionic nitridings gear material meets the regulation of GB/T3077-1999 standards.
8. according to claim 1-7 any one of them compressor conditioning treatment technique of 35CrMoV ionic nitriding gears,
It is characterized in that：The conditioning treatment technique is suitable for turbine centrifugal compressor 35CrMoV ionic nitriding gears.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110153650A (en) * | 2019-04-30 | 2019-08-23 | 沈阳透平机械股份有限公司 | The processing method of the saddle-shaped groove blade seat of large-scale axial flow type compressor |
| CN112553419A (en) * | 2020-10-27 | 2021-03-26 | 沈阳透平机械股份有限公司 | Critical heat treatment method for martensite alloy steel welded impeller |
| CN115011779A (en) * | 2022-06-23 | 2022-09-06 | 东风商用车有限公司 | High-speed heavy-load automobile nitrided inner gear ring and production process thereof |
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| CN110153650A (en) * | 2019-04-30 | 2019-08-23 | 沈阳透平机械股份有限公司 | The processing method of the saddle-shaped groove blade seat of large-scale axial flow type compressor |
| CN112553419A (en) * | 2020-10-27 | 2021-03-26 | 沈阳透平机械股份有限公司 | Critical heat treatment method for martensite alloy steel welded impeller |
| CN115011779A (en) * | 2022-06-23 | 2022-09-06 | 东风商用车有限公司 | High-speed heavy-load automobile nitrided inner gear ring and production process thereof |
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