CN109023224A - A kind of flank of tooth shallow-layer ion nitriding method of thin-walled fine module gear - Google Patents

A kind of flank of tooth shallow-layer ion nitriding method of thin-walled fine module gear Download PDF

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Publication number
CN109023224A
CN109023224A CN201811058573.4A CN201811058573A CN109023224A CN 109023224 A CN109023224 A CN 109023224A CN 201811058573 A CN201811058573 A CN 201811058573A CN 109023224 A CN109023224 A CN 109023224A
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CN
China
Prior art keywords
gear
thin
flank
tooth
fine module
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Pending
Application number
CN201811058573.4A
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Chinese (zh)
Inventor
陈汉兵
邹安炳
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Guizhou Qunjian Precision Machine Co Ltd
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Guizhou Qunjian Precision Machine Co Ltd
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Priority to CN201811058573.4A priority Critical patent/CN109023224A/en
Publication of CN109023224A publication Critical patent/CN109023224A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C8/00Solid 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
    • C23C8/06Solid 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
    • C23C8/36Solid 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
    • C23C8/38Treatment of ferrous surfaces
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18Hardening; Quenching with or without subsequent tempering
    • C21D1/25Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/32Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C8/00Solid 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
    • C23C8/02Pretreatment of the material to be coated

Abstract

The invention discloses a kind of flank of tooth shallow-layer ion nitriding methods of thin-walled fine module gear, this method includes following process: gear blank → rough turn → quenched → smart car → gear hobbing → gear honing → glow discharge nitriding → ball blast → inspection → storage, wherein glow discharge nitriding is after cleaning up gear surface, it is placed on glow discharge nitriding equipment cathode disc, 35mm distance is kept between adjacent parts, 80Pa or less is first evacuated in furnace, it is then charged with nitrogen 800Pa, gear part is heated to using auxiliary thermal source, 460 DEG C, it is evacuated to 80Pa or less again, thermal decomposition ammonia is slowly introducing to 280Pa, after soaking time 60min, cool to 200 DEG C or less taking-up gear parts with the furnace.The present invention solves the unstability of thin-walled fine module gear glow discharge nitriding layer depth, improve fine module gear flank of tooth ion-nitriding layer quality, with preferable process stability, to keep thin-walled fine module gear wear-resisting property good, and nitrided case depth stable and uniform, process reproducibility are good.

Description

A kind of flank of tooth shallow-layer ion nitriding method of thin-walled fine module gear
Technical field
The present invention relates to a kind of flank of tooth shallow-layer ion nitriding methods of thin-walled fine module gear, belong to metal material nitriding skill Art field.
Background technique
Glow discharge nitriding technology has high efficiency, high-wearing feature, energy saving, reduction labor intensity, environmental pollution The features such as few.With manufacturing continuous development, high requirement is proposed to the service life of part, using conventional heat treatment Technology is difficult to achieve the purpose that prolong its service life, generally use chemical treatment nitriding method to piece surface strengthen to Improve part service life.But it is shallower for the nitrided case depth of thin-walled fine module gear demand, generally less than 0.05~ 0.15mm, when being handled using conventional glow ion nitriding, it is difficult to obtain satisfactory nitriding layer, it may appear that nitrided case depth is inclined Deep phenomenon, is easy to cause gear teeth brittle failure, causes gear initial failure, influence the service life of gear.
Summary of the invention
It is thin to control the object of the present invention is to provide a kind of flank of tooth shallow-layer ion nitriding method of thin-walled fine module gear Wall fine module gear nitrided case depth improves the service life of thin-walled fine module gear.
A kind of flank of tooth shallow-layer ion nitriding method of thin-walled fine module gear of the invention, including following process: gear blank → Rough turn → quenched → smart car → gear hobbing → gear honing → glow discharge nitriding → ball blast → inspection → storage.
In the above method, the rough turn process is that subsequent finish reserves 0.8~1.4mm machining allowance.
In the above method, the quenched process is in the special atmosphere oven for be put into part 850~870 DEG C, heat preservation 80~ 5~8min is quickly cooled down after 100min in 80~90 DEG C of quenching oils, is then placed into tempering furnace, in 620~640 DEG C return After keeping the temperature 90~120min in stove, quickly removes and be cooled to room temperature in water.
In the above method, the smart car process is part gear blank size.
In the above method, the gear hobbing process is that subsequent gear honing reserves 0.005~0.01mm of size machining allowance.
In the above method, the glow discharge nitriding process is to be placed on glow discharge nitriding equipment after cleaning up gear surface On cathode disc, 30~40mm distance is kept between adjacent gear, first will be evacuated to 80Pa in furnace hereinafter, being then charged with nitrogen Gear is heated to 450~470 DEG C using auxiliary thermal source, then is evacuated to 80Pa hereinafter, being slowly introducing heat by 600~1000Pa Ammonia is decomposed to 260~290Pa, after 50~100min of soaking time, cools to 200 DEG C with the furnace hereinafter, taking out gear.
In the above method, the quenched process, the temperature control process of glow discharge nitriding process use thermocouple measuring temperature, pressure Using sheet type manometer measures pressure, time, temperature, pressure are recorded using recording instrument, temperature uniformity requirement is ±5℃。
By adopting the above-described technical solution, the present invention has the advantages that the present invention solve thin-walled fine module gear from The unstability of sub- nitrided case depth improves fine module gear flank of tooth ion-nitriding layer quality, has preferable process Stability, the thin-walled fine module gear wear-resisting property of the method processing is good through the invention, improves contact fatigue strength, and And nitrided case depth stable and uniform, process reproducibility are good.The present invention realizes 0.05~0.15mm of gear glow discharge nitriding layer depth.
Detailed description of the invention
Fig. 1 is the pressue-graph of intermediate ion nitriding process of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and examples to this hair It is bright to be described in further detail.
The embodiment of the present invention: the thin-walled fine module gear in the present embodiment is made using 40CrNiMoA.The present invention A kind of thin-walled fine module gear flank of tooth shallow-layer ion nitriding method, this method includes following process: gear blank → rough turn → tune Matter → smart car → gear hobbing → gear honing → glow discharge nitriding → ball blast → inspection → storage.The present invention is after gear honing process using ion Nitriding carries out a kind of method of shallow-layer glow discharge nitriding to the flank of tooth.Glow discharge nitriding be after cleaning up gear surface be placed on from On sub- nitriding equipment cathode disc, 35mm distance is kept between adjacent parts.First 80Pa is evacuated in furnace hereinafter, being then charged with Gear part is heated to, 460 DEG C by nitrogen 800Pa using auxiliary thermal source, then is evacuated to 80Pa hereinafter, being slowly introducing heat point Ammonia is solved to 280Pa, after soaking time 60min, cools to 200 DEG C or less taking-up gear parts with the furnace.Glow discharge nitriding process Press process is as shown in Figure 1.
When processing according to above-mentioned operation, rough turn process is that subsequent finish reserves 1mm machining allowance.Quenched process is by tooth Wheel part is put into 860 DEG C of special atmosphere oven, is quickly cooled down 6min in 80 DEG C of quenching oils after keeping the temperature 90min, is then put again Enter in tempering furnace, after keeping the temperature 100min in 620 DEG C of tempering furnace, quickly removes and be cooled to room temperature in water.Smart car process is Gear part gear blank size.Gear hobbing process is that subsequent gear honing reserves size 0.008mm machining allowance.The quenched process, ion The temperature control process of nitriding process uses thermocouple measuring temperature, and pressure uses sheet type manometer measures pressure, using automatic note It records instrument and records time, temperature, pressure, temperature uniformity requires to be ± 5 DEG C.
Basic principle of the invention: the material of thin-walled fine module gear (40CrNiMoA) is structural alloy steel, typical Heat treatment is that surface is strengthened in ionic nitriding, and still, because of glow discharge nitriding wide temperature range, surface has been in temperature-rise period There is the infiltration of nitrogen-atoms, causes the deep-controlled difference of fine module gear shallow-layer glow discharge nitriding, unstable quality.The present invention is in ion The temperature-rise period of nitridation shortens glow discharge nitriding process using auxiliary heating source for heating to technological temperature, is penetrated by control nitrogen-atoms Temperature range, soaking time, to obtain preferable nitrided case depth (0.05~0.15mm), and nitriding layer is uniform and stable, matter It measures, to improve the service life of thin-walled fine module gear.

Claims (7)

1. a kind of flank of tooth shallow-layer ion nitriding method of thin-walled fine module gear, it is characterised in that: including following process: gear blank → Rough turn → quenched → smart car → gear hobbing → gear honing → glow discharge nitriding → ball blast → inspection → storage.
2. the flank of tooth shallow-layer ion nitriding method of thin-walled fine module gear according to claim 1, it is characterised in that: described Rough turn process is that subsequent finish reserves 0.8~1.4mm machining allowance.
3. the flank of tooth shallow-layer ion nitriding method of thin-walled fine module gear according to claim 1, it is characterised in that: described Quenched process after keeping the temperature 80~100min, is quenched at 80~90 DEG C in the special atmosphere oven for be put into part 850~870 DEG C It is quickly cooled down 5~8min in oil, then places into tempering furnace, 90~120min is kept the temperature in 620~640 DEG C of tempering furnace Afterwards, it quickly removes and is cooled to room temperature in water.
4. the flank of tooth shallow-layer ion nitriding method of thin-walled fine module gear according to claim 1, it is characterised in that: described Smart car process is part gear blank size.
5. the flank of tooth shallow-layer ion nitriding method of thin-walled fine module gear according to claim 1, it is characterised in that: described Gear hobbing process is that subsequent gear honing reserves 0.005~0.01mm of size machining allowance.
6. the flank of tooth shallow-layer ion nitriding method of thin-walled fine module gear according to claim 1, it is characterised in that: described Glow discharge nitriding process is placed on glow discharge nitriding equipment cathode disc, protects between adjacent gear after cleaning up gear surface 30~40mm distance is held, first will be evacuated to 80Pa in furnace hereinafter, 600~1000Pa of nitrogen is then charged with, using auxiliary thermal source Gear is heated to 450~470 DEG C, then is evacuated to 80Pa hereinafter, being slowly introducing thermal decomposition ammonia to 260~290Pa, heat preservation After 50~100min of time, 200 DEG C are cooled to the furnace hereinafter, taking out gear.
7. the flank of tooth shallow-layer ion nitriding method of thin-walled fine module gear according to claim 1, it is characterised in that: described Quenched process, the temperature control process of glow discharge nitriding process use thermocouple measuring temperature, and pressure uses sheet type manometry pressure Power records time, temperature, pressure using recording instrument, and temperature uniformity requires to be ± 5 DEG C.
CN201811058573.4A 2018-09-11 2018-09-11 A kind of flank of tooth shallow-layer ion nitriding method of thin-walled fine module gear Pending CN109023224A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112276500A (en) * 2020-10-20 2021-01-29 贵州群建精密机械有限公司 Method for processing small-modulus sector worm gear

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102876854A (en) * 2012-10-12 2013-01-16 上海电机学院 Tempering treatment technical method for 1Cr12 martensite stainless steel pressure spring forge piece
CN103831598A (en) * 2012-11-23 2014-06-04 大连名阳实业有限公司 Method for machining inner hole of thin-wall external gear
CN104308483A (en) * 2014-09-05 2015-01-28 南京金鑫传动设备有限公司 Method for manufacturing small module gear
CN105695922A (en) * 2014-11-25 2016-06-22 上海新力动力设备研究所 Surface glow ion nitriding method of 30Cr3SiNiMoVA steel
CN105714238A (en) * 2014-12-04 2016-06-29 重庆聆益机械有限公司 Pre-oxidation rapid nitriding process for heavy-duty gear
CN105714088A (en) * 2014-12-05 2016-06-29 重庆永林机械设备有限公司 Spindle box gear heat treatment technology
CN106514165A (en) * 2016-12-15 2017-03-22 贵州群建精密机械有限公司 Glow-ion nitriding treatment method for gear made of 05Cr17Ni4Cu4Nb material
CN107058939A (en) * 2017-04-18 2017-08-18 东莞市欣悦模具有限公司 Nitrogen spring plunger rod(Piston rod)Technology for Heating Processing
CN107858633A (en) * 2017-12-26 2018-03-30 武汉钢铁有限公司 A kind of sensing heating nitriding method of orientation silicon steel

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102876854A (en) * 2012-10-12 2013-01-16 上海电机学院 Tempering treatment technical method for 1Cr12 martensite stainless steel pressure spring forge piece
CN103831598A (en) * 2012-11-23 2014-06-04 大连名阳实业有限公司 Method for machining inner hole of thin-wall external gear
CN104308483A (en) * 2014-09-05 2015-01-28 南京金鑫传动设备有限公司 Method for manufacturing small module gear
CN105695922A (en) * 2014-11-25 2016-06-22 上海新力动力设备研究所 Surface glow ion nitriding method of 30Cr3SiNiMoVA steel
CN105714238A (en) * 2014-12-04 2016-06-29 重庆聆益机械有限公司 Pre-oxidation rapid nitriding process for heavy-duty gear
CN105714088A (en) * 2014-12-05 2016-06-29 重庆永林机械设备有限公司 Spindle box gear heat treatment technology
CN106514165A (en) * 2016-12-15 2017-03-22 贵州群建精密机械有限公司 Glow-ion nitriding treatment method for gear made of 05Cr17Ni4Cu4Nb material
CN107058939A (en) * 2017-04-18 2017-08-18 东莞市欣悦模具有限公司 Nitrogen spring plunger rod(Piston rod)Technology for Heating Processing
CN107858633A (en) * 2017-12-26 2018-03-30 武汉钢铁有限公司 A kind of sensing heating nitriding method of orientation silicon steel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112276500A (en) * 2020-10-20 2021-01-29 贵州群建精密机械有限公司 Method for processing small-modulus sector worm gear

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Application publication date: 20181218