CN110306152A - A kind of pinion steel surface boronizing process - Google Patents
A kind of pinion steel surface boronizing process Download PDFInfo
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- CN110306152A CN110306152A CN201811463885.3A CN201811463885A CN110306152A CN 110306152 A CN110306152 A CN 110306152A CN 201811463885 A CN201811463885 A CN 201811463885A CN 110306152 A CN110306152 A CN 110306152A
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- Prior art keywords
- steel surface
- boron
- gear
- additive
- ammonia
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/02—Pretreatment of the material to be coated
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—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
-
- 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
- C23C8/60—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 solids, e.g. powders, pastes
- C23C8/62—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 solids, e.g. powders, pastes only one element being applied
- C23C8/68—Boronising
- C23C8/70—Boronising of ferrous surfaces
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The present invention provides a kind of pinion steel surface boronizing processes, comprising the following steps: (1) carries out nanosizing processing to gear steel surface using surface mechanical attrition method；(2) boron supplying agent and additive are dispersed in gear steel surface after mixing, are put into permeation furnace, are heated after being passed through ammonia.By carrying out nanosizing processing to gear steel surface first, accelerate the chemical reaction velocity of surface mass, then using ammonia as reaction medium, ammonia is thermally decomposed to generate activated nitrogen atom and hydrogen.One side activated nitrogen atom can preferentially penetrate into gear surface, play activation；On the other hand, the collective effect of hydrogen and additive makes to decompose the boron oxide generated reduction generation pure boron by boron source, accelerates the reduction process of boron in boron supplying agent, realizes the infiltration of boron at a lower temperature.This method can be handled without vacuum condition, existing conventional equipment, and process costs are low, and the application especially in terms of spiral bevel gear can improve surface strength and service life.
Description
Technical field
The invention belongs to metal surface technical field of thermal treatment, and in particular to a kind of pinion steel surface boronizing technique side
Method.
Background technique
Gear is the key components and parts of mechanical industry, and the overwhelming majority is manufactured using steel.It can be improved by boronizing technology
Steel material is wear-resisting, corrosion-resistant and antifatigue etc. performances, to effectively improve gear quality.Boronising is that boron element is penetrated into metal
Material surface, obtains the diffusion process of boride infiltration layer, and boride layer has very high hardness, excellent wearability and good resistance to
Corrosivity.
In recent years, people have carried out a large amount of research to boriding process and Borizing Mechanism, and common boriding process has solid
Powder method, salt bath diffusion method and gas boronising.Liu Xiang et al. (heat processing technique, 2004, (4): 36-37) has studied steel boronising
The quadrature analysis of technique, research shows that Optimal Temperature be 950 DEG C, but part be heat-treated at high temperature there are deflection greatly, at
A series of problems, such as this height and big brittlement of boriding layer；Bear loves homeland (external metal heat treatmet, 2002,23 (6): 21-24) with three
Boron fluoride gas is boron source, has studied gas boriding technique, although treatment temperature can be reduced using boron triflouride gas boronising,
But boron trifluoride has toxicity and corrosivity, and boronising easily sets off an explosion in boron trifluoride atmosphere, can not play gas boriding behaviour
Make advantage simple, that boride layer is uniform, actually brings very big difficulty to production.Application No. is in 200510027282.5
State's invention patent discloses a kind of technological process for surface low temperature boriding of low carbon steel, and uses poisonous gas B (OCH3) it is boronising
Agent, there are security risks.
Summary of the invention
Present invention combination nanotechnology, after carrying out nanosizing processing to gear surface, with borate or boron in permeation furnace
Acid anhydride is boron supplying agent, realizes under the collective effect of ammonia and additive and forces boronising at a lower temperature, ultimately forms hardness
Higher, more smooth compisite seeping layer.To solve the problems, such as that it is big that above-mentioned boriding process medium temperature spends height, gas boron source toxicity.
To achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of pinion steel surface boronizing process, comprising the following steps: (1) using surface mechanical attrition method to pinion steel
Surface carries out nanosizing processing；(2) boron supplying agent and additive are dispersed in gear steel surface after mixing, are put into permeation furnace
It is interior, heating treatment is carried out after being passed through ammonia, is warming up to 450~500 DEG C first, preheats 1h, is continuously heating to 700~720 DEG C, is seeped
Boron cools to room temperature with the furnace after keeping the temperature 2~4h.
Preferably, the boron supplying agent is sodium tetraborate or boric anhydride, and boron supplying agent decomposes when heated generates boron oxide.
Preferably, the additive is the mixture of silicon carbide, aluminium powder, ammonium chloride and sodium carbonate.Each component presses quality hundred
Divide than composition are as follows: silicon carbide is 60~65%, aluminium powder 30~35%, ammonium chloride 3~5%, sodium carbonate 3~5%.In permeation furnace
Ammonia is generated nitrogen and hydrogen by thermal decomposition in furnace, and nitrogen, which is changed into activated nitrogen atom and preferentially penetrates into gear steel surface, to be formed
Fe2N has activated gear steel surface；The boron oxide generated is decomposed in the common work of additive and hydrogen by sodium tetraborate or boric anhydride
Pure boron is generated with lower reduction, boron occurs interfacial reaction formation boride layer in gear steel surface and inwardly spreads, to realize
In the infiltration of gear steel surface.
Preferably, described that the mechanical milling method of nanosizing processing is carried out using metal material surface to gear steel surface
Nano Assay machine, so that gear steel surface reaches nanoscale structures.
The utility model has the advantages that
(1) present invention carries out nanosizing processing to gear steel surface first, has after pinion steel surface grain refinement big
The crystal boundary of amount, they can be used as the quick diffusion admittance of atom, accelerate the chemical reaction velocity of surface mass.
(2) ammonia is filled in permeation furnace, ammonia is thermally decomposed to generate activated nitrogen atom and hydrogen.One side active nitrogen is former
Son can preferentially penetrate into gear surface, play activation；On the other hand, the collective effect of hydrogen and additive makes boron oxide also
Raw pure boron is originated in, the reduction process of boron in boron supplying agent is accelerated, improves permeation effect.Avoid using gas boron source toxicity, danger
Dangerous big problem realizes the infiltration of boron at a lower temperature.In addition, this method is without vacuum condition, existing conventional equipment energy
Processing, process costs are low, and high yield rate.
(3) by the hardness test to infiltration layer, process through the invention can form infiltration layer in gear steel surface
Thickness about at 40 μm, microhardness is 1800~2000HV, so that the comprehensive performance of gear steel surface is preferable, is preferably sent out
Wave the excellent performance of infiltration layer.Application especially in terms of spiral bevel gear can improve surface strength and service life.
Specific embodiment
Below with reference to embodiment, the present invention will be further explained.
Embodiment 1
Nanosizing processing is carried out to gear steel surface first, utilizes existing SNC-1 metal-surface nano experimental machine pair
Pinion steel is handled, and is cleaned up after so that its surface is reached nanostructure.
Using sodium tetraborate as boron supplying agent, the usage amount of each component by mass percentage is respectively that silicon carbide is in additive
60%, aluminium powder 32%, ammonium chloride 3%, sodium carbonate 5%.Sodium tetraborate and additive are dispersed in pinion steel table after mixing
Face is put into permeation furnace, is heated after being passed through ammonia, is warming up to 450~470 DEG C in advance first, is preheated 1h, is continued to heat up
To 700~720 DEG C, boronising cools to room temperature with the furnace after keeping the temperature 2~4h.Finally the hardness of infiltration layer is detected.
Embodiment 2
By same processing method in embodiment 1, nanosizing processing is carried out to gear steel surface first.Boric anhydride is used instead to supply
Boron agent, it is 62% that the usage amount of each component by mass percentage, which is respectively silicon carbide, in additive, aluminium powder 30%, ammonium chloride 4%,
Sodium carbonate 4%.Boric anhydride and additive are dispersed in gear steel surface after mixing, is put into permeation furnace, it is laggard to be passed through ammonia
Row heat treatment, is warming up to 450~470 DEG C in advance first, preheats 1h, is continuously heating to 700~720 DEG C, after boronising keeps the temperature 2~4h
Cool to room temperature with the furnace.Finally the hardness of infiltration layer is detected.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the principle of the present invention, several improvement can also be made, these improvement also should be regarded as of the invention
Protection scope.
Claims (5)
1. a kind of pinion steel surface boronizing process, it is characterised in that the following steps are included:
(1) nanosizing processing is carried out to gear steel surface using surface mechanical attrition method；
(2) gear steel surface is dispersed in after mixing with boron supplying agent and additive, be put into permeation furnace, carried out after being passed through ammonia
Heat treatment, is warming up to 450~500 DEG C in advance first, preheats 1h, is continuously heating to 700~720 DEG C, boronising keep the temperature after 2~4h with
Furnace is cooled to room temperature.
2. a kind of pinion steel surface boronizing process according to claim 1, it is characterised in that: the boron supplying agent is four
Boratex or boric anhydride.
3. a kind of pinion steel surface boronizing process according to claim 1, it is characterised in that: the additive is carbon
SiClx, aluminium powder, ammonium chloride and sodium carbonate mixture.
4. a kind of pinion steel surface boronizing process according to claim 3, it is characterised in that: the additive presses matter
Measure percentage composition are as follows: silicon carbide is 60~65%, aluminium powder 30~35%, ammonium chloride 3~5%, sodium carbonate 3~5%.
5. a kind of pinion steel surface boronizing process according to claim 1, it is characterised in that: in the step (1)
The mechanical milling method of nanosizing processing is carried out using Nano surface of metal material testing machine to gear steel surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811463885.3A CN110306152A (en) | 2018-12-03 | 2018-12-03 | A kind of pinion steel surface boronizing process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811463885.3A CN110306152A (en) | 2018-12-03 | 2018-12-03 | A kind of pinion steel surface boronizing process |
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| CN110306152A true CN110306152A (en) | 2019-10-08 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU685719A1 (en) * | 1978-04-10 | 1979-09-15 | Ленинградский Институт Авиационного Приборостроения | Method of gaseous boronizing of items |
| CN85105832A (en) * | 1985-08-02 | 1986-06-10 | 兰州炼油厂机械厂 | Superalloy salt bath boronizing agent and preparation method thereof |
| CN1970825A (en) * | 2006-12-08 | 2007-05-30 | 湖北工业大学 | Surface low-temperature boriding process for hot-work die steel |
| CN102080204A (en) * | 2011-03-10 | 2011-06-01 | 大连三木得科技有限公司 | Heating processing technology of metal steel tube |
| CN104451536A (en) * | 2014-12-12 | 2015-03-25 | 西安理工大学 | Method for rapidly boriding Q235 steel |
-
2018
- 2018-12-03 CN CN201811463885.3A patent/CN110306152A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU685719A1 (en) * | 1978-04-10 | 1979-09-15 | Ленинградский Институт Авиационного Приборостроения | Method of gaseous boronizing of items |
| CN85105832A (en) * | 1985-08-02 | 1986-06-10 | 兰州炼油厂机械厂 | Superalloy salt bath boronizing agent and preparation method thereof |
| CN1970825A (en) * | 2006-12-08 | 2007-05-30 | 湖北工业大学 | Surface low-temperature boriding process for hot-work die steel |
| CN102080204A (en) * | 2011-03-10 | 2011-06-01 | 大连三木得科技有限公司 | Heating processing technology of metal steel tube |
| CN104451536A (en) * | 2014-12-12 | 2015-03-25 | 西安理工大学 | Method for rapidly boriding Q235 steel |
Non-Patent Citations (1)
| Title |
|---|
| 雷天同等: "粉末法硼氮和碳氮共渗中氮原子的扩散和作用", 《金属热处理》 * |
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Application publication date: 20191008 |