CN108866311A - A kind of heat treatment process of 20CrMnMoA steel pricker gear - Google Patents
A kind of heat treatment process of 20CrMnMoA steel pricker gear Download PDFInfo
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- CN108866311A CN108866311A CN201810892387.4A CN201810892387A CN108866311A CN 108866311 A CN108866311 A CN 108866311A CN 201810892387 A CN201810892387 A CN 201810892387A CN 108866311 A CN108866311 A CN 108866311A
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- Prior art keywords
- bevel gear
- 20crmnmoa
- gear
- steel pricker
- heat treatment
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 38
- 239000010959 steel Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000010438 heat treatment Methods 0.000 title claims abstract description 27
- 230000008569 process Effects 0.000 title claims abstract description 25
- 238000010791 quenching Methods 0.000 claims abstract description 22
- 230000000171 quenching effect Effects 0.000 claims abstract description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000005255 carburizing Methods 0.000 claims abstract description 11
- 238000004321 preservation Methods 0.000 claims abstract description 11
- 238000012545 processing Methods 0.000 claims abstract description 9
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 6
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 6
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 6
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 6
- 238000005496 tempering Methods 0.000 claims abstract description 6
- 229910001566 austenite Inorganic materials 0.000 claims description 29
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 24
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 17
- 229910000734 martensite Inorganic materials 0.000 claims description 17
- 230000000717 retained effect Effects 0.000 claims description 16
- 238000004140 cleaning Methods 0.000 claims description 15
- 239000011159 matrix material Substances 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 238000001953 recrystallisation Methods 0.000 claims description 7
- 238000005242 forging Methods 0.000 claims description 6
- 238000010792 warming Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 5
- 238000001764 infiltration Methods 0.000 claims description 5
- 230000008595 infiltration Effects 0.000 claims description 5
- 239000003350 kerosene Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 4
- 239000001110 calcium chloride Substances 0.000 claims description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims 1
- 229910052729 chemical element Inorganic materials 0.000 abstract description 4
- 230000006872 improvement Effects 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 238000002386 leaching Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/60—Aqueous agents
-
- 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
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/613—Gases; Liquefied or solidified normally gaseous material
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- 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
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/001—Austenite
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The present invention provides a kind of heat treatment process of 20CrMnMoA steel pricker gear, and bevel gear chemical element component and its mass percentage are C：0.17%~0.23%, Si：0.17%~0.37%, Mn：0.8%~1.3%, Cr：1.0%~1.3%, Ti：0.04%~0.12%, Mo：0.20%~0.30%, Ni<0.03%, Cu<0.03%, P<0.035%, S<0.035%, the surplus is iron, by after anti-carburizi ng processing, carburizing, heat preservation, two-stage quenching, normalized treatment, tempering through over mechanical processing be made a kind of high intensity, high impact toughness, high tensile property 20CrMnMoA steel pricker gear.
Description
Technical field
The present invention relates to the processing technique field of mechanical part, in particular at the heat of a kind of 20CrMnMoA steel pricker gear
Science and engineering skill.
Background technique
Recently as the development of national economy, axis class, the demand of bevel gear class part are more and more, service life and carrying
Ability directly affects the economic benefit of machinery production producer, improves axis class, the bearing capacity of bevel gear class part and uses the longevity
It orders more and more important in machinery industry.Common bevel gear, axis and carburizing part need to be after forging, cutting, then carry out normalizing, seep
The techniques heat treatment such as carbon quenching and lonneal, having obtained superficial layer is hard carburized layer, center portion for good resultant force
The tissue of performance is learned, contains martensite, retained austenite and massive carbide etc. in structure organization, these tissues and quenching
The residual stress of generation has decisive action to the mechanical property such as hardness, torsional strength etc. of axis and carburizing part.
Intensity, the harden ability of 20CrMnMoA steel ratio 20CrMnTi steel are high, but impact flexibility is slightly lower.Carburizing steel is mainly used as,
Can cool down direct quenching after carburizing, and bending strength is higher, wear-resisting property is good.It can use, cut after quenched low-temperature is tempered or is quenched
It is medium to cut processability.For manufacturing the biggish heavy load carburizing part in Tractor Industry middle section and the biggish gear of stress, gear
Axis, worm screw etc..
Bevel gear needs to work in cyclic loading, shock loading, very large contacting stress and be seriously worn under conditions of, because
This requires surface hard and wear-resisting, and center portion is strong and tough, has high fatigue limit.Therefore, it is necessary to optimize 20CrMnMoA steel heat treatment
Technique prepares the bevel gear of high intensity, high impact toughness, high tensile property.
Summary of the invention
The purpose of the present invention is to provide a kind of heat treatment process of 20CrMnMoA steel pricker gear, it is intended to prepare high-strength
The bevel gear of degree, high impact toughness, high tensile property.
The present invention provides a kind of heat treatment process of 20CrMnMoA steel pricker gear, the 20CrMnMoA steel pricker gear chemistry
Elemental composition and its mass percentage are：C：0.17%~0.23%, Si：0.17%~0.37%, Mn：0.8%~
1.3%, Cr：1.0%~1.3%, Ti：0.04%~0.12%, Mo：0.20%~0.30%, Ni<0.03%, Cu<
0.03%, P<0.035%, S<0.035%, the surplus is iron, and the heat treatment process includes the following steps：
S1：Preparatory process：By bevel gear forging cleaning, drying, the disc between the gear teeth of bevel gear is carried out at anti-carburizi ng
Reason；
S2：Carburizing：The mode for using temperature heating, is heated to 920-930 DEG C to gas carbruizing furance, bevel gear is vertical
Stack in furnace, be vented, keep the temperature 2.5h, drip when heat preservation kerosene 160-180 drop/minute, infiltration layer reach cool to 830 after requirement ±
10℃；
S3：Heat preservation：Keep the temperature soaking 2h；
S4：Two-stage quenching：It is dipped vertically into calcium chloride solution at a temperature of between 820-850 DEG C to by bevel gear, it will
Bevel gear is warming up to 700-750 DEG C, keeps the temperature 1h, then bevel gear is immersed liquid nitrogen by bevel gear rapid cooling to after 210-240 DEG C
In be quenched to -20 DEG C -0 DEG C；
S5：It is cleaned and dried：Spray cleaning solution cleaning is carried out to bevel gear, washes away the calcium chloride solution on bevel gear surface, then spray
It is dry after leaching antirust solution；
S6：Normalized treatment；
S7：Through over mechanical processing finished product bevel gear after tempering.
As a further improvement of the present invention, the calcium chloride cool time is 4-8s in step S4, and the Quenching in liquid nitrogen time is 10-
20s。
As a further improvement of the present invention, the calcium chloride cool time is 6s in step S4, and the Quenching in liquid nitrogen time is 15s.
As a further improvement of the present invention, the wheel teeth portion matrix of 20CrMnMoA steel pricker gear is superfine needle-shaped geneva
Body, for residual austenite content 1.2~3.4%, center portion matrix is thinner lath martensite, residual austenite content 10~
15%.
As a further improvement of the present invention, the grain size grade of the retained austenite recrystallization of 20CrMnMoA steel pricker gear
It Wei not be 14-15 grades.
Compared with prior art, the invention has the advantages that：
1. two-stage quenching technical of the invention is pressed for the first time using calcium chloride solution as quenching medium, rapidly make bevel gear cooling
Cooling makes the austenite on surface layer change martensite, and the volume expansion on surface layer forms compression on the surface layer of bevel gear, and reduction is quenched
The generation of fire crack line, then make by way of being warming up to 700-750 DEG C tying again for retained austenite in 20CrMnMoA steel pricker gear
Crystalline substance further refines bevel gear interior tissue, and finally using Quenching in liquid nitrogen to subzero, the retained austenite of bevel gear is into one
Step is converted to martensite, and the wheel teeth portion residual austenite content of final 20CrMnMoA steel pricker gear obtained is shown 1.2~3.4
It writes and improves bevel gear hardness, intensity, impact flexibility and tensile property.
2. the present invention uses and first passes through this maximum quenching medium of cooling velocity at 600 DEG C of calcium chloride solution to bevel gear
Short time pole cold quenching is carried out, metal grain is refined, by being quenched again using the liquid nitrogen further long period after recrystallization, in this way
The wheel portion matrix for obtaining bevel gear is superfine acicular martensite, and center portion matrix is thinner lath martensite, retained austenite
Grain size reach higher level, crystal grain is tiny, and tissue line succession is high, and yield strength is big, can improve the strong of bevel gear
Degree can improve the tensile property and toughness of bevel gear again.
3. on the one hand the temperature-rise period in two-stage quenching technical of the present invention recrystallizes retained austenite, on the other hand
A part of martensite transfor mation is austenite, increases the residual austenite of the content of retained austenite in bevel gear, especially center portion
The content of body, 1.2~3.4, the content of the retained austenite of center portion contains the residual austenite content of wheel portion in retained austenite
Amount is 10~15%, wheel teeth portion hardness with higher, wearability and the hot crackability resistant to high temperatures of the bevel gear of this structure
Can, center portion impact flexibility with higher and shock resistance.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with specific embodiment.Obviously, described
Embodiment be only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiment of the present invention, ability
Domain those of ordinary skill every other embodiment obtained without creative efforts, belongs to guarantor of the present invention
The range of shield.
The present invention discloses a kind of heat treatment process of 20CrMnMoA steel pricker gear, specific embodiment is as follows.
Embodiment 1
A kind of heat treatment process of 20CrMnMoA steel pricker gear, 20CrMnMoA steel pricker gear chemical element component and its matter
Measuring percentage composition is：C：0.17%, Si：0.17%, Mn：0.8%, Cr：1.0%, Ti：0.04%, Mo：0.20%, Ni<
0.03%, Cu<0.03%, P<0.035%, S<0.035%, the surplus is iron, and the heat treatment process includes the following steps：
S1：Preparatory process：By bevel gear forging cleaning, drying, the disc between the gear teeth of bevel gear is carried out at anti-carburizi ng
Reason；
S2：Carburizing：The mode for using temperature heating, is heated to 950 DEG C to gas carbruizing furance, bevel gear vertical pile is entered
In furnace, exhaust keeps the temperature 2.5h, and kerosene 160-180 drop/minute is dripped when heat preservation, and infiltration layer cools to 830 ± 10 DEG C after reaching requirement；
S3：Heat preservation：Keep the temperature soaking 2h；
S4：Two-stage quenching：It is dipped vertically into calcium chloride solution at a temperature of between 820-850 DEG C to by bevel gear, it will
After bevel gear rapid cooling 4s to 210-240 DEG C, bevel gear is warming up to 700-750 DEG C, keeps the temperature 1h, then bevel gear is immersed into liquid
10s to -20 DEG C -0 DEG C is quenched in nitrogen；
S5：It is cleaned and dried：Spray cleaning solution cleaning is carried out to bevel gear, washes away the calcium chloride solution on bevel gear surface, then spray
It is dry after leaching antirust solution；
S6：Normalized treatment；
S7：Through over mechanical processing finished product bevel gear after tempering.
The wheel teeth portion matrix of 20CrMnMoA steel pricker gear is superfine acicular martensite after testing, and retained austenite contains
Amount is 3.4%, and center portion matrix is thinner lath martensite, and residual austenite content is in 10%, 20CrMnMoA steel pricker gear
The grain size number of retained austenite recrystallization is 14 grades.
Embodiment 2
A kind of heat treatment process of 20CrMnMoA steel pricker gear, 20CrMnMoA steel pricker gear chemical element component and its matter
Measuring percentage composition is：C：0.23%, Si：0.37%, Mn：1.3%, Cr：1.3%, Ti：0.12%, Mo：0.30%, Ni<
0.03%, Cu<0.03%, P<0.035%, S<0.035%, the surplus is iron, and the heat treatment process includes the following steps：
S1：Preparatory process：By bevel gear forging cleaning, drying, the disc between the gear teeth of bevel gear is carried out at anti-carburizi ng
Reason；
S2：Carburizing：The mode for using temperature heating, is heated to 920-930 DEG C to gas carbruizing furance, bevel gear is vertically folded
It is put into furnace, is vented, keep the temperature 2.5h, kerosene 160-180 drop/minute is dripped when heat preservation, infiltration layer cools to 830 ± 10 after reaching requirement
℃；
S3：Heat preservation：Keep the temperature soaking 2h；
S4：Two-stage quenching：It is dipped vertically into calcium chloride solution at a temperature of between 820-850 DEG C to by bevel gear, it will
After bevel gear rapid cooling 8s to 210-240 DEG C, bevel gear is warming up to 700-750 DEG C, keeps the temperature 1h, then bevel gear is immersed into liquid
20s to -20 DEG C -0 DEG C is quenched in nitrogen；
S5：It is cleaned and dried：Spray cleaning solution cleaning is carried out to bevel gear, washes away the calcium chloride solution on bevel gear surface, then spray
It is dry after leaching antirust solution；
S6：Normalized treatment；
S7：Through over mechanical processing finished product bevel gear after tempering.
The wheel teeth portion matrix of the 20CrMnMoA steel pricker gear is superfine acicular martensite, residual austenite after testing
Body content is 1.2%, and center portion matrix is thinner lath martensite, and residual austenite content is in 15%, 20CrMnMoA steel pricker tooth
The grain size number of the retained austenite recrystallization of wheel is 14 grades.
Embodiment 3
A kind of heat treatment process of 20CrMnMoA steel pricker gear, 20CrMnMoA steel pricker gear chemical element component and its matter
Measuring percentage composition is：C：0.21%, Si：0.26%, Mn：0.11%, Cr：1.2%, Ti：0.08%, Mo：0.25%, Ni<
0.03%, Cu<0.03%, P<0.035%, S<0.035%, the surplus is iron, and the heat treatment process includes the following steps：
S1：Preparatory process：By bevel gear forging cleaning, drying, the disc between the gear teeth of bevel gear is carried out at anti-carburizi ng
Reason；
S2：Carburizing：The mode for using temperature heating, is heated to 920-930 DEG C to gas carbruizing furance, bevel gear is vertically folded
It is put into furnace, is vented, keep the temperature 2.5h, kerosene 160-180 drop/minute is dripped when heat preservation, infiltration layer cools to 830 ± 10 after reaching requirement
℃；
S3：Heat preservation：Keep the temperature soaking 2h；
S4：Two-stage quenching：It is dipped vertically into calcium chloride solution at a temperature of between 820-850 DEG C to by bevel gear, it will
After bevel gear rapid cooling 6s to 210-240 DEG C, bevel gear is warming up to 700-750 DEG C, keeps the temperature 1h, then bevel gear is immersed into liquid
15s to -20 DEG C -0 DEG C is quenched in nitrogen；
S5：It is cleaned and dried：Spray cleaning solution cleaning is carried out to bevel gear, washes away the calcium chloride solution on bevel gear surface, then spray
It is dry after leaching antirust solution；
S6：Normalized treatment；
S7：Through over mechanical processing finished product bevel gear after tempering.
After testing, the wheel teeth portion matrix of 20CrMnMoA steel pricker gear is superfine acicular martensite, and retained austenite contains
Amount is 2.1%, and center portion matrix is thinner lath martensite, and residual austenite content is in 12%, 20CrMnMoA steel pricker gear
The grain size number of retained austenite recrystallization is 15 grades.
Table 1 is the hardness and mechanical experimental results of bevel gear.
The performance indicator of 1 bevel gear of table
Embodiment 1-3's the result shows that, bevel gear provided by the invention by calcium chloride solution it is this at 600 DEG C it is cooling
The maximum quenching medium of speed carries out short time pole cold quenching to bevel gear, refines metal grain, by using liquid again after recrystallization
The quenching of nitrogen further long period is achieved in that the wheel portion matrix of bevel gear is superfine acicular martensite, center portion matrix be compared with
Thin lath martensite, the grain size of retained austenite reach higher level, and crystal grain is tiny, and tissue line succession is high, surrender
Intensity is big, can improve the intensity of bevel gear but also improve the tensile property and toughness of bevel gear, therefore bevel gear of the invention
With high rigidity, high tensile/yield strength and high impact flexibility.
Above to a kind of heat treatment process of 20CrMnMoA steel pricker gear provided by the present invention.Tool used herein
Principle and implementation of the present invention are described for body embodiment, and the above embodiments are only used to help understand originally
The method and its core concept of invention.It should be pointed out that for those skilled in the art, not departing from this hair
, can be with several improvements and modifications are made to the present invention under the premise of bright principle, these improvement and modification also fall into power of the present invention
In the protection scope that benefit requires.
Claims (5)
1. a kind of heat treatment process of 20CrMnMoA steel pricker gear, it is characterised in that：The 20CrMnMoA steel pricker gear chemistry
Elemental composition and its mass percentage are：C：0.17%~0.23%, Si：0.17%~0.37%, Mn：0.8%~
1.3%, Cr：1.0%~1.3%, Ti：0.04%~0.12%, Mo：0.20%~0.30%, Ni<0.03%, Cu<
0.03%, P<0.035%, S<0.035%, the surplus is iron, and the heat treatment process includes the following steps：
S1：Preparatory process：By bevel gear forging cleaning, drying, anti-carburizi ng processing is carried out to the disc between the gear teeth of bevel gear；
S2：Carburizing：The mode for using temperature heating, is heated to 920-930 DEG C to gas carbruizing furance, bevel gear vertical pile is entered
In furnace, exhaust keeps the temperature 2.5h, and kerosene 160-180 drop/minute is dripped when heat preservation, and infiltration layer cools to 830 ± 10 DEG C after reaching requirement；
S3：Heat preservation：Keep the temperature soaking 2h；
S4：Two-stage quenching：It is dipped vertically into calcium chloride solution at a temperature of between 820-850 DEG C to by bevel gear, tooth will be bored
Rapid cooling is taken turns to after 210-240 DEG C, bevel gear is warming up to 700-750 DEG C, keeps the temperature 1h, then bevel gear is immersed in liquid nitrogen and is quenched
Fire is to -20 DEG C -0 DEG C；
S5：It is cleaned and dried：Spray cleaning solution cleaning is carried out to bevel gear, washes away the calcium chloride solution on bevel gear surface, then spray anti-
It is dry after rust liquid；
S6：Normalized treatment；
S7：Through over mechanical processing finished product bevel gear after tempering.
2. a kind of heat treatment process of 20CrMnMoA steel pricker gear according to claim 1, it is characterised in that：Step S4
The middle calcium chloride cool time is 4-8s, and the Quenching in liquid nitrogen time is 10-20s.
3. a kind of heat treatment process of 20CrMnMoA steel pricker gear according to claim 1, it is characterised in that：Step S4
The middle calcium chloride cool time is 6s, and the Quenching in liquid nitrogen time is 15s.
4. a kind of heat treatment process of 20CrMnMoA steel pricker gear according to claim 1, it is characterised in that：It is described
The wheel teeth portion matrix of 20CrMnMoA steel pricker gear is superfine acicular martensite, and residual austenite content is 1.2~3.4%, the heart
Portion's matrix is thinner lath martensite, and residual austenite content is 10~15%.
5. a kind of heat treatment process of 20CrMnMoA steel pricker gear according to claim 1, it is characterised in that：It is described
The grain size number of the retained austenite recrystallization of 20CrMnMoA steel pricker gear is 14-15 grades.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113510449A (en) * | 2021-04-07 | 2021-10-19 | 中国重汽集团济南动力有限公司 | A kind of hard-tooth surface axle wheel side inclined inner gear ring and its manufacturing method |
| JP2023089730A (en) * | 2021-12-16 | 2023-06-28 | 株式会社神戸製鋼所 | Steel material, steel parts, and method of manufacturing steel parts |
| CN116751937A (en) * | 2023-06-06 | 2023-09-15 | 常州市聚科精工制造有限公司 | A kind of low alloy high strength steel quenched and tempered steel and its quenching and tempering process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101265582A (en) * | 2008-04-30 | 2008-09-17 | 上海热处理厂有限公司 | 20CrMnMo energy-saving carburizing composite heat treating process |
| CN104451043A (en) * | 2014-11-29 | 2015-03-25 | 江西洪都航空工业集团有限责任公司 | Intensive quenching process for 20CrMnMo steel |
| CN107299204A (en) * | 2017-03-31 | 2017-10-27 | 西南大学 | A kind of processing method of raising 20CrMnMo hardness of steel |
| CN108165883A (en) * | 2018-01-22 | 2018-06-15 | 弗兰德传动系统有限公司 | 20crmnmo steel and its processing method |
-
2018
- 2018-08-07 CN CN201810892387.4A patent/CN108866311A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101265582A (en) * | 2008-04-30 | 2008-09-17 | 上海热处理厂有限公司 | 20CrMnMo energy-saving carburizing composite heat treating process |
| CN104451043A (en) * | 2014-11-29 | 2015-03-25 | 江西洪都航空工业集团有限责任公司 | Intensive quenching process for 20CrMnMo steel |
| CN107299204A (en) * | 2017-03-31 | 2017-10-27 | 西南大学 | A kind of processing method of raising 20CrMnMo hardness of steel |
| CN108165883A (en) * | 2018-01-22 | 2018-06-15 | 弗兰德传动系统有限公司 | 20crmnmo steel and its processing method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113510449A (en) * | 2021-04-07 | 2021-10-19 | 中国重汽集团济南动力有限公司 | A kind of hard-tooth surface axle wheel side inclined inner gear ring and its manufacturing method |
| CN113510449B (en) * | 2021-04-07 | 2024-03-19 | 中国重汽集团济南动力有限公司 | Hard tooth surface axle wheel edge inclined annular gear and manufacturing method thereof |
| JP2023089730A (en) * | 2021-12-16 | 2023-06-28 | 株式会社神戸製鋼所 | Steel material, steel parts, and method of manufacturing steel parts |
| JP7545949B2 (en) | 2021-12-16 | 2024-09-05 | 株式会社神戸製鋼所 | Steel material, steel part, and manufacturing method of steel part |
| CN116751937A (en) * | 2023-06-06 | 2023-09-15 | 常州市聚科精工制造有限公司 | A kind of low alloy high strength steel quenched and tempered steel and its quenching and tempering process |
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