CN105861936A - Heat treatment method for age hardening type nitriding gear steel - Google Patents
Heat treatment method for age hardening type nitriding gear steel Download PDFInfo
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- CN105861936A CN105861936A CN201610322106.2A CN201610322106A CN105861936A CN 105861936 A CN105861936 A CN 105861936A CN 201610322106 A CN201610322106 A CN 201610322106A CN 105861936 A CN105861936 A CN 105861936A
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- gear
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- 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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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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
-
- 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
- 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
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- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
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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
- C23C8/24—Nitriding
- C23C8/26—Nitriding of ferrous surfaces
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The invention relates to a heat treatment method for age hardening type nitriding gear steel and belongs to the field of materials and heat treatment. The age hardening type nitriding gear steel comprises, by mass, 0.10%-0.25% of C, 0.3%-1.0% of Cr, 3.0%-4.0% of Ni, 1.0%-2.0% of Mn, 0.2%-0.5% of Si, 0.5%-1.5% of Al, 0.2%-0.6% of Mo, 0.1%-0.3% of V, 0-0.030% of P, 0-0.030% of S and the balance Fe and other residual elements and inevitable impurities and is characterized in that the content ratio of the Ni/Al is 2.5-3.5, and the total content of the Cr, the Mo and the V is 1.0%-1.5%. The heat treatment method comprises the steps that after gear rough turning is conducted, solid solution treatment is conducted; after semi-finish turning and gear rough rolling (shaving) are conducted, stress relief annealing is conducted; and after gear finish rolling (shaving) or gear rough grinding is conducted, nitriding treatment is conducted. According to the heat treatment method for the age hardening type nitriding gear steel, the novel steel grade used for manufacturing high-speed heavy-load precision gears and the nitriding method for replacing conventional carburizing and quenching are provided; the gear surface hardness is 900-1000 HV, the hardness of the position, away from 0.4 mm, under the gear surface is larger than 600 HV, and the core hardness is 38-45 HRC; the quenching process is omitted, the technology is simple, and gear deformation is small; and the quality is stable, the rejection rate is low, and the production efficiency is greatly improved.
Description
The invention belongs to material and Field of Heat-treatment, be the heat treatment method of a kind of age hardening steel for manufacturing nitriding gear, use at air cooling solid solution
Reason and Nitrizing Treatment, can reach the serviceability of carburized gears.
The serviceability of gear and reliability ensure by gear material and thermal treatment quality, and for requiring at a high speed, that continuous property safe and reliable to operation is high is big
Middle gear, commonly uses the material manufactures such as 12CrNi3,12Cr2Ni4 steel, and uses carburizing quenching process.This kind of material gear need to through repeatedly carburizing and
Repeated hardening is tempered, and causes gear shifting quadrant texturing very big, and complex process, quality is unstable, and percent defective is high, and the production cycle is long.
The present invention relates to one and save carburizing and quenching, use the heat treatment method of the age hardening steel of Nitrizing Treatment method manufacture gear.This timeliness is hard
The chemical composition quality proportioning changing steel is C 0.10%～0.25%, Cr 0.3%～1.0%, Ni 3.0～4.0%, Mn 1.0%～2.0%,
Si 0.2%～0.5%, Al 0.5%～1.5%, Mo 0.2%～0.6%, V 0.1%～0.3%, P≤0.030%, S≤0.030%, surplus is Fe
With other relict elements and inevitable impurity, it is necessary to assure nickel aluminum coexists in right amount, it is ensured that Ni/Al content ratio is 2.5～3.5, it is achieved age-hardening
Effect, it is ensured that a certain amount of Cr-Mo-V coexists, it is ensured that CrMoV total content is 1.0～1.5%, it is achieved nitriding invigoration effect.
The present invention realizes the unification of material and technique, and age hardening steel uses solution treatment and Nitrizing Treatment to combine, it is achieved gear surface is strengthened
(900～1000HV) and simultaneously gear heart portion strengthening (38～45HRC), and conventional quenched and tempered steel nitriding hardness can only achieve 28～36HRC, Gu
After molten process, hardness relatively low (28～33HRC), are suitable to machining.Age hardening steel air cooling solution treatment, stress relief annealing and Nitrizing Treatment knot
The process program closed, it is achieved that the low stress of gear heat treatment and homogenization, greatly reduces distortion, stabilised quality.It is an object of the invention to province
Remove high-temperature carburizing and oil quenching, and instead air cooling solution treatment and low temperature nitriding.Solution treatment uses 840～900 DEG C 2～4h air cooling, and hardness is
28～33HRC, it is suitable for machining, inter process 400～450 DEG C 5～10h stress relief annealing, advantageously reduces machining stress, and use
500～550 DEG C 30～100h is carried out once to four change nitriding temperatures, and each temperature retention time changes the alternating temperature Nitrizing Treatment of (10～40h) accordingly
Can ensure that gear surface and heart portion multiple strengthening, it is achieved the strengthening on nitriding time top layer.
The nitriding method of the present invention is different from the feature of conventional quenched and tempered steel nitriding method, is that age hardening steel carries out nitriding under solid solution condition simultaneously hard
Changing and age-hardening, it is necessary to the requirement according to nitriding time surface strengthening is different, controlling different phase with age-hardening is main or based on nitrogen-hardening,
Or nitrogen-hardening and age-hardening are carried out simultaneously, controlling hardening process and diffusion process when selecting to relent, therefore alternating temperature nitriding is that timeliness is hard
Change the new method of steel nitriding, gear surface and heart portion can be made simultaneously to be strengthened.
The working condition of gear is to bear fatigue load under contact stress, the flank of tooth wants to bear under the wear-resisting and flank of tooth shear stress, and tooth root bears
Tired bending stress, therefore, it is achieved replacing Carburization Treatment with Nitrizing Treatment, the core of technique not only gear surface is wear-resisting, it is important to energy under the flank of tooth
Bearing shear stress, therefore it is required that high surface hardness (>=900HV), high shear strength under the flank of tooth, certain nitriding layer depth is necessary, the most deeply
Layer nitriding can not meet whole requirements of gear, it is necessary to realizes deep layer hardening, it is ensured that under the flank of tooth, at 0.4mm, hardness is more than 600HV, and this is this
The key of invention nitridation process, and under common nitriding gear teeth face, at 0.4mm, hardness can only achieve 400～500HV.The present invention uses alternating temperature nitriding
Process is to strengthen nitriding time top layer, only in the case of age hardening steel and alternating temperature nitridation process correctly combine, just can reach These parameters (0.4mm
Place's hardness is more than 600HV).
The present invention can save carburizing and quenching and use air cooling solution treatment, has fundamentally stopped gear shifting quadrant texturing, uses Nitrizing Treatment to reach gear surface hardening
And heart portion is simultaneously through age-hardening, it is ensured that the serviceability of gear and precision.
Use the present invention to manufacture gear, technique can be greatly simplified and improve production efficiency, fundamentally solving gear shifting quadrant texturing, steady quality, percent defective
The lowest.It is suitable for manufacture die casting and mould of plastics.
Claims (4)
1. a heat treatment method for age-hardening type nitriding pinion steel, described nitriding pinion steel chemical composition quality proportioning is C
0.10%～0.25%, Cr 0.3%～1.0%, Ni 3.0%～4.0%, Mn 1.0%～2.0%, Si 0.2%～0.5%, Al
0.5%～1.5%, Mo 0.2%～0.6%, V 0.1%～0.3%, P≤0.030%, S≤0.030%, surplus be Fe and other
Relict element and inevitable impurity, is characterized in that in chemical composition, Ni/Al content ratio is 2.5～3.5, and CrMoV total content is
1.0～1.5%；Described heat treatment method includes solution treatment, stress relief annealing and Nitrizing Treatment.
2. heat treatment method as described in claim 1, it is characterised in that carry out solution treatment after gear is rough turn: 840～900 DEG C of insulations
2～4 hours air coolings, hardness 28～33HRC.
3. heat treatment method as described in claim 1, it is characterised in that stress relief annealing after gear half finish turning and thick rolling (shaving) tooth:
5～10 hours stoves of 400～450 DEG C of insulations are cold.
4. heat treatment method as described in claim 1, it is characterised in that Nitrizing Treatment after gear essence rolling (shaving) tooth or corase grind tooth: alternating temperature ion
Nitriding or gas nitriding, 500～550 DEG C are incubated 30～100 hours, gear surface hardness 900～1000HV, 0.4mm under gear surface
Place's hardness is more than 600HV, centre hardness 38～45HRC, depth of penetration 0.5～1.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610322106.2A CN105861936A (en) | 2016-05-10 | 2016-05-10 | Heat treatment method for age hardening type nitriding gear steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610322106.2A CN105861936A (en) | 2016-05-10 | 2016-05-10 | Heat treatment method for age hardening type nitriding gear steel |
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| CN105861936A true CN105861936A (en) | 2016-08-17 |
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| CN201610322106.2A Pending CN105861936A (en) | 2016-05-10 | 2016-05-10 | Heat treatment method for age hardening type nitriding gear steel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106435351A (en) * | 2016-06-17 | 2017-02-22 | 江苏苏凯冶电设备制造有限公司 | Novel steel nitriding plug and processing process thereof |
| CN107723631A (en) * | 2017-09-01 | 2018-02-23 | 东风精密铸造安徽有限公司 | A kind of compression mod heat-treatment technology method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560282A (en) * | 2012-01-30 | 2012-07-11 | 杜树芳 | Nitrided gear steel and heat treatment method thereof |
| CN104762561A (en) * | 2015-04-08 | 2015-07-08 | 杜树芳 | Nitriding wearing-resistant steel and thermal treatment method thereof |
| CN105734592A (en) * | 2014-12-12 | 2016-07-06 | 重庆晨宇机床制造有限公司 | Heat treatment technology for 45-steel gear |
| CN105755476A (en) * | 2014-12-13 | 2016-07-13 | 青岛勤德索具有限公司 | Heat treatment process for gear steel |
-
2016
- 2016-05-10 CN CN201610322106.2A patent/CN105861936A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560282A (en) * | 2012-01-30 | 2012-07-11 | 杜树芳 | Nitrided gear steel and heat treatment method thereof |
| CN105734592A (en) * | 2014-12-12 | 2016-07-06 | 重庆晨宇机床制造有限公司 | Heat treatment technology for 45-steel gear |
| CN105755476A (en) * | 2014-12-13 | 2016-07-13 | 青岛勤德索具有限公司 | Heat treatment process for gear steel |
| CN104762561A (en) * | 2015-04-08 | 2015-07-08 | 杜树芳 | Nitriding wearing-resistant steel and thermal treatment method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106435351A (en) * | 2016-06-17 | 2017-02-22 | 江苏苏凯冶电设备制造有限公司 | Novel steel nitriding plug and processing process thereof |
| CN106435351B (en) * | 2016-06-17 | 2018-05-18 | 江苏久恒新材料科技有限公司 | A kind of steel nitriding top and its processing technology |
| CN107723631A (en) * | 2017-09-01 | 2018-02-23 | 东风精密铸造安徽有限公司 | A kind of compression mod heat-treatment technology method |
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