CN108588387A - A kind of pre-oxidation process improving wind power gear gas carburizing efficiency - Google Patents
A kind of pre-oxidation process improving wind power gear gas carburizing efficiency Download PDFInfo
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- CN108588387A CN108588387A CN201810348110.5A CN201810348110A CN108588387A CN 108588387 A CN108588387 A CN 108588387A CN 201810348110 A CN201810348110 A CN 201810348110A CN 108588387 A CN108588387 A CN 108588387A
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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
-
- 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
- C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
-
- 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
-
- 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
- C23C8/08—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
- C23C8/10—Oxidising
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/20—Carburising
- C23C8/22—Carburising of ferrous surfaces
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- 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)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The present invention relates to a kind of pre-oxidation processes improving wind power gear gas carburizing efficiency, include the following steps：Carburizing steel processing is cut into flute profile sample；Sample is subjected to modifier treatment；It will be cleaned by ultrasonic after sample grinding process, dried；Sample is put into program-controlled cabinet-type electric furnace, pre-oxidation treatment is carried out；Sample is put into gas carburizing multipurpose furnace, carburizing, quenching, temper are successively carried out.The beneficial effects of the invention are as follows：Pre-oxidation treatment is carried out before gas carburizing, specimen surface is set to generate layer oxide film, sample surface layer wetability increases, be conducive to the absorption of active atoms of carbon, oxidation film is preferentially reduced in carburizing process, so that specimen surface the defects of there are a large amount of holes, it can accelerate infiltration of the active atoms of carbon to intrinsic silicon, an express passway is provided for the diffusion of carbon atom, gas carburizing efficiency can not only be significantly improved, and carburizing time is greatly shortened in the case where reaching identical carburized layer depth, it is energy saving.
Description
Technical field
The present invention relates to a kind of pre-oxidation processes improving wind power gear gas carburizing efficiency.
Background technology
Wind power gear is the critical component of wind power generating set, due to wind power generating set be generally mounted to wilderness, field,
In place of the wind energies such as mountain pass, seashore are larger and surrounding have no occluder, natural environment is severe, has inconvenient traffic, and repairs very difficult, wind-powered electricity generation
Gear will seriously affect the economic benefit of wind field, therefore the reliability to gear and working life proposition once breaking down
Very high requirement.
Currently, at home and abroad in the Case hardening techniques of gear, Carburization Treatment is because of its maturity of technology and with temperature
The development of the supporting technologies such as control, carbon-potential control is always the preferred technique that wind power gear is strengthened, however, using conventional gas
Carburizing there is process cycles it is long, energy consumption is high, labor intensity is big the problems such as, seriously affected production efficiency.
Invention content
The technical problem to be solved by the present invention is to：Based on the above issues, the present invention provides a kind of raising wind power gear gas
The pre-oxidation process of carburizing efficiency.
The present invention solves a technical solution used by its technical problem：A kind of raising wind power gear gas carburizing effect
The pre-oxidation process of rate, includes the following steps：
(1) carburizing steel processing is cut into sample.Sample is processed into the examination of M12 flute profiles by the preferred 20CrMnMo steel of carburizing steel
Sample.
(2) sample is subjected to modifier treatment, modifier treatment is first to be warming up to 840 DEG C of heat preservation 30min, then immediately by sample
It is put into cooling in oil, then is warming up to 680 DEG C of heat preservation 30min, taking-up is air-cooled to room temperature.
(3) sample is placed in program-controlled cabinet-type electric furnace, carries out pre-oxidation treatment, setting furnace temperature is 350~500 DEG C, heat preservation
Time is 45~60min；
(4) sample after pre-oxidation treatment is put into gas carburizing multipurpose furnace, is warming up to 800 DEG C, keep the temperature 2h, kept
0.4% carbon potential carries out carburizing, then heats to 920 DEG C, keeps carbon potential 1.2% to carry out the strong carburizings of 4h, then reduce carbon potential and arrive
0.68% carries out 4h diffusions, is then furnace-cooled to 820 DEG C, cools down again with stove after keeping the temperature 2h；It then takes out sample and is put into cooling in oil,
50 DEG C of oil temperature；Last 170 DEG C of heat preservations 5h, comes out of the stove air-cooled.
(5) sample is taken out, measures its section microhardness using HXD-1000TMC type microhardness testers after cooling, into
And measure its carburized layer depth.
The beneficial effects of the invention are as follows：
(1) deficiency that conventional gas carburizing efficiency is low, and the production cycle is grown is overcome；
(2) by the processing method of pre-oxidation, sample surface layer wellability first increases, and is conducive to the suction of active atoms of carbon
Attached, in addition specimen surface generates layer oxide film, and oxidation film can be gradually reduced in carburizing process, form loose porous expansion
Channel is dissipated, more adsorption sites and diffusion admittance are provided for carbon atom in carburizing process, significantly improves gas carburizing effect
Rate improves carburized layer thickness；Hardness gradient is preferable；
Description of the drawings
The following further describes the present invention with reference to the drawings.
Fig. 1 is the section microhardness comparison diagram of section microhardness and conventional process gas carburizing that embodiment 1 obtains；
Fig. 2 is the section microhardness comparison diagram of section microhardness and conventional process gas carburizing that embodiment 2 obtains；
Fig. 3 is the section microhardness comparison diagram of section microhardness and conventional process gas carburizing that embodiment 3 obtains；
Wherein, GC represents conventional gas carburizing, and PO1+GC represents embodiment 1, and PO2+GC represents embodiment 2, PO3+GC generations
Table embodiment 3.
Specific implementation mode
Presently in connection with specific embodiment, the invention will be further described, following embodiment be intended to illustrate invention rather than
Limitation of the invention further.
Embodiment 1
(1) 20CrMnMo steel is processed into M12 flute profile samples；
(2) sample is subjected to modifier treatment, is first warming up to 840 DEG C of heat preservation 30min, is then immediately placed in sample cold in oil
But, then 680 DEG C of heat preservation 30min are warming up to, taking-up is air-cooled to room temperature.
(3) sample is placed in program-controlled cabinet-type electric furnace, carries out pre-oxidation treatment, setting furnace temperature is 350 DEG C, and soaking time is
45min；
(4) sample after pre-oxidation treatment is put into gas carburizing multipurpose furnace, is warming up to 800 DEG C, keep the temperature 2h, kept
0.4% carbon potential carries out carburizing, then heats to 920 DEG C, keeps carbon potential 1.2% to carry out the strong carburizings of 4h, then reduce carbon potential and arrive
0.68% carries out 4h diffusions, is then furnace-cooled to 820 DEG C, cools down again with stove after keeping the temperature 2h；It then takes out sample and is put into cooling in oil,
50 DEG C of oil temperature；Last 170 DEG C of heat preservations 5h, comes out of the stove air-cooled.
(5) sample is taken out, measures its section microhardness using HXD-1000TMC type microhardness testers after cooling, into
And its carburized layer depth is measured, section microhardness is shown in Fig. 1.
1 test result of embodiment：
The carburized layer depth that pre-oxidation treatment+gas carburizing obtains is about 1.46mm, is obtained compared to conventional gas carburizing
The carburized layer depth of 1.22mm increase 0.24mm, be equivalent to carburizing efficiency and improve 19.7%, and hardness gradient is preferable.
Embodiment 2
(1) 20CrMnMo steel is processed into M12 flute profile samples；
(2) sample is subjected to modifier treatment, is first warming up to 840 DEG C of heat preservation 30min, is then immediately placed in sample cold in oil
But, then 680 DEG C of heat preservation 30min are warming up to, taking-up is air-cooled to room temperature.
(3) sample is placed in program-controlled cabinet-type electric furnace, carries out pre-oxidation treatment, setting furnace temperature is 350 DEG C, and soaking time is
60min；
(4) sample after pre-oxidation treatment is put into gas carburizing multipurpose furnace, is warming up to 800 DEG C, keep the temperature 2h, kept
0.4% carbon potential carries out carburizing, then heats to 920 DEG C, keeps carbon potential 1.2% to carry out the strong carburizings of 4h, then reduce carbon potential and arrive
0.68% carries out 4h diffusions, is then furnace-cooled to 820 DEG C, cools down again with stove after keeping the temperature 2h；It then takes out sample and is put into cooling in oil,
50 DEG C of oil temperature；Last 170 DEG C of heat preservations 5h, comes out of the stove air-cooled.
(5) sample is taken out, measures its section microhardness using HXD-1000TMC type microhardness testers after cooling, into
And its carburized layer depth is measured, section microhardness is shown in Fig. 2
2 test result of embodiment：
The carburized layer depth that pre-oxidation treatment+gas carburizing obtains is about 1.48mm, is obtained compared to conventional gas carburizing
The carburized layer depth of 1.22mm increase 0.26mm, be equivalent to carburizing efficiency and improve 21.3%, and hardness gradient is preferable.
Embodiment 3
(1) 20CrMnMo steel is processed into M12 flute profile samples；
(2) sample is subjected to modifier treatment, is first warming up to 840 DEG C of heat preservation 30min, is then immediately placed in sample cold in oil
But, then 680 DEG C of heat preservation 30min are warming up to, taking-up is air-cooled to room temperature；
(3) sample is placed in program-controlled cabinet-type electric furnace, carries out pre-oxidation treatment, setting furnace temperature is 500 DEG C, and soaking time is
45min；
(4) sample after pre-oxidation treatment is put into gas carburizing multipurpose furnace, is warming up to 800 DEG C, keep the temperature 2h, kept
0.4% carbon potential carries out carburizing, then heats to 920 DEG C, keeps carbon potential 1.2% to carry out the strong carburizings of 4h, then reduce carbon potential and arrive
0.68% carries out 4h diffusions, is then furnace-cooled to 820 DEG C, cools down again with stove after keeping the temperature 2h；It then takes out sample and is put into cooling in oil,
50 DEG C of oil temperature；Last 170 DEG C of heat preservations 5h, comes out of the stove air-cooled.
(5) sample is taken out, measures its section microhardness using HXD-1000TMC type microhardness testers after cooling, into
And its carburized layer depth is measured, section microhardness is shown in Fig. 3.
3 test result of embodiment：
The carburized layer depth that pre-oxidation treatment+gas carburizing obtains is about 1.57mm, is obtained compared to conventional gas carburizing
The carburized layer depth of 1.22mm increase 0.35mm, be equivalent to carburizing efficiency and improve 28.7%, and hardness gradient is preferable.
It is enlightenment with above-mentioned desirable embodiment according to the present invention, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the contents of the specification, it is necessary to determine that its is technical according to right.
Claims (5)
1. a kind of pre-oxidation process improving wind power gear gas carburizing efficiency, it is characterized in that：Include the following steps：
(1) carburizing steel processing is cut into flute profile sample；
(2) sample is subjected to modifier treatment；
(3) sample is placed in program-controlled cabinet-type electric furnace, carries out pre-oxidation treatment；
(4) sample is put into gas carburizing multipurpose furnace, carries out carburizing, quenching, temper；
(5) sample is taken out, uses HXD-1000TMC type microhardness testers to measure section microhardness after cooling, and measure it and ooze
Carbon-coating is deep, and layer depth is 550HV with hardness0.05Subject to.
2. a kind of pre-oxidation process improving wind power gear gas carburizing efficiency according to claim 1, it is characterized in that：Institute
The preferred 20CrMnMo steel of carburizing steel in the step of stating (1), sample are processed into M12 flute profile samples.
3. a kind of pre-oxidation process improving wind power gear gas carburizing efficiency according to claim 1, it is characterized in that：Institute
Modifier treatment is in the step of stating (2)：840 DEG C of heat preservation 30min are first warming up to, sample is then immediately placed in cooling in oil, then
680 DEG C of heat preservation 30min are warming up to, room temperature is air-cooled to after taking-up.
4. a kind of pre-oxidation process improving wind power gear gas carburizing efficiency according to claim 1, it is characterized in that：Institute
Pre-oxidation treatment temperature is 350~500 DEG C in the step of stating (3), and soaking time is 45~60min.
5. a kind of pre-oxidation process improving wind power gear gas carburizing efficiency according to claim 1, it is characterized in that：Institute
The step of stating be in (4)：800 DEG C are warming up to, 2h is kept the temperature, 0.4% carbon potential is kept to carry out carburizing, then heats to 920 DEG C, is kept
Carbon potential 1.2% carries out the strong carburizings of 4h, then reduces carbon potential and carry out 4h diffusions to 0.68%, is then furnace-cooled to 820 DEG C, keeps the temperature after 2h again
Cool down with stove；It then takes out sample and is put into oil cooling, 50 DEG C of oil temperature；Last 170 DEG C of heat preservations 5h, comes out of the stove air-cooled.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810348110.5A CN108588387A (en) | 2018-04-18 | 2018-04-18 | A kind of pre-oxidation process improving wind power gear gas carburizing efficiency |
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| CN201810348110.5A CN108588387A (en) | 2018-04-18 | 2018-04-18 | A kind of pre-oxidation process improving wind power gear gas carburizing efficiency |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110343994A (en) * | 2019-08-08 | 2019-10-18 | 常州天山重工机械有限公司 | A kind of micro- aberration control method of flywheel ring gear carburizing and quenching |
| CN112375895A (en) * | 2020-07-09 | 2021-02-19 | 无锡市海峰海林精密轴承有限公司 | GCr15 steel ball surface layer optimized modification heat treatment process |
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| CN101984139A (en) * | 2010-11-30 | 2011-03-09 | 江苏丰东热技术股份有限公司 | Carburizing method for wind power gear used for wind power generation |
| CN103014601A (en) * | 2012-12-09 | 2013-04-03 | 常州大学 | Austenitic stainless steel ion nitriding permeation catalyzing process |
| CN104195567A (en) * | 2014-06-23 | 2014-12-10 | 杭州前进齿轮箱集团股份有限公司 | Cemented quenching heat treatment method of automobile engine gears |
| CN104894506A (en) * | 2015-06-24 | 2015-09-09 | 南车戚墅堰机车车辆工艺研究所有限公司 | Automobile transmission gear heat treatment method |
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2018
- 2018-04-18 CN CN201810348110.5A patent/CN108588387A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101984139A (en) * | 2010-11-30 | 2011-03-09 | 江苏丰东热技术股份有限公司 | Carburizing method for wind power gear used for wind power generation |
| CN103014601A (en) * | 2012-12-09 | 2013-04-03 | 常州大学 | Austenitic stainless steel ion nitriding permeation catalyzing process |
| CN104195567A (en) * | 2014-06-23 | 2014-12-10 | 杭州前进齿轮箱集团股份有限公司 | Cemented quenching heat treatment method of automobile engine gears |
| CN104894506A (en) * | 2015-06-24 | 2015-09-09 | 南车戚墅堰机车车辆工艺研究所有限公司 | Automobile transmission gear heat treatment method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110343994A (en) * | 2019-08-08 | 2019-10-18 | 常州天山重工机械有限公司 | A kind of micro- aberration control method of flywheel ring gear carburizing and quenching |
| CN110343994B (en) * | 2019-08-08 | 2022-01-11 | 常州天山重工机械有限公司 | Carburizing and quenching micro-distortion control method for flywheel gear ring |
| CN112375895A (en) * | 2020-07-09 | 2021-02-19 | 无锡市海峰海林精密轴承有限公司 | GCr15 steel ball surface layer optimized modification heat treatment process |
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