CN102400140A - Treatment method for surface micro-arc oxidation of agricultural plough - Google Patents
Treatment method for surface micro-arc oxidation of agricultural plough Download PDFInfo
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- CN102400140A CN102400140A CN 201110337435 CN201110337435A CN102400140A CN 102400140 A CN102400140 A CN 102400140A CN 201110337435 CN201110337435 CN 201110337435 CN 201110337435 A CN201110337435 A CN 201110337435A CN 102400140 A CN102400140 A CN 102400140A
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Abstract
The invention provides a treatment method for surface micro-arc oxidation of an agricultural plough, which comprises the following steps in sequence: (1) a working surface of the plough is burnished by using a fine sandpaper so as to remove an oxide layer on the working surface of the plough, and is successively cleaned for 15min by using ultrasonic waves in acetone and distilled water; (2) the plough is placed in a plating solution of A00 commercially pure aluminum, is dipped for 2 to 5min at a temperature of 730 DEG C in a crucible furnace and is then diffused for 60 to 70min at a temperature of 900 DEG C, so as to enable a plating to be homogenized and thickened; (3) the surface of the dipped and plated plough is burnished and polished by using a silicon carbide sandpaper, and is successively cleaned for 10min by using ultrasonic waves in the acetone and the distilled water; (4) the dipped and plated plough is put in an alkaline working solution, and by taking the dipped and plated plough as a positive electrode, taking a working tank as a negative electrode and controlling the working temperature at 30 DEG C, the dipped and plated plough is treated for 65 to 95min under a condition that a single pulse power supply is used, the pulsed voltage is 350 to 450V, and the working frequency of pulses is 60 to 200Hz; and (5) the treated plough is cleaned for 5 times by using the distilled water, and then the plough subjected to surface micro-arc oxidation is obtained. The wear-resisting property of the plough with a micro-arc oxidation ceramic layer, which is obtained by adopting the treatment method, is obviously better than the wear-resisting property of the existing alloy steel plough. By adopting the micro-arc oxidation ceramic layer obtained by adopting the treatment method, the wear-resisting property of the surface of the plough is obviously increased, and the service life of the plough is obviously prolonged.
Description
Technical field
The present invention relates to a kind of treatment process of agricultural plough surface by micro-arc oxidation, and the agricultural plough product that uses this treatment process to obtain.
Background technology
At present, Chinese agriculture belongs to state-owned farm and the household person farming is main.In the farming pattern of family, the general many employing cast irons of the ploughshare of arable land usefulness, but the toughness of cast iron is relatively poor, is impacted easily in the farming and fragmentation.The method that adopts magnesium iron casting ploughshare (seeing CN 1048480A and CN 101589661A) or electroplate colter (CN 102181896A) is also arranged, solve the toughness problem of plough.But because cast iron inherent characteristic, toughness is relatively poor, even electroplated the colter surface, the matrix itself that can not solve plough is a cast iron and cause the problem of the poor toughness of matrix.Most casual household peasants improve the work-ing life of plough in order to solve production cost, mainly use the plough of joist steel cutting welding; The plough material is a steel; Or to buy material be the plough of steel, so just can solve the flexible problem of plough, but the wear resisting property of the workplace of plough is relatively poor.And state-owned large-scale farm, special reclamation area, Heilungkiang, the agricultural machinery and implement majority is external import, and the material of plough is generally alloy steel material and forms through modulation treatment, and the wear resistance of this plough is relatively poor, the cutting edge rust of ploughing in the use, it is higher to change the plough cost.
All there is the problem of wearing no resistance in the above-mentioned said plough that no matter is casual household or farm are used.In order to reduce cost and the wear resistance that improves the metallic surface, can adopt ways such as collosol and gel, plasma spraying, laser surface modification and plasma immersion ion injection to handle to metal surface modification.Yet sol-gel method exists bonding strength not high, and plasma spraying and the complex-shaped workpiece of laser surface modification intractable, plasma immersion ion inject exists the high problem of equipment manufacturing cost.Under simple, the easy to operate and economical and efficient prerequisite, adopt differential arc oxidation can effectively improve the wear resisting property on plough surface at equipment.Simultaneously, adopt the method for differential arc oxidation to improve the wear resistance on ploughshare surface and the research of erosion resistance, Shang Weijian studies report.
Differential arc oxidation is as in the aqueous electrolyte liquid with valve metals such as Al, Mg, Ti or its alloy; Utilize electrochemical method; In changing the surface micropore of material, produce the spark discharge spot, under thermochemistry, plasma chemistry and electrochemical acting in conjunction, original position generates the method for ceramic membrane.This method has basically no environmental pollution property waste liquid and exhaust gas discharging problem, meets the idea of development of environmental type process for modifying surface.
Summary of the invention
The invention provides a kind of treatment process of agricultural plough surface by micro-arc oxidation, gained has the obvious wear resisting property owing to existing steel matter plough of wear resisting property of the plough of arc differential oxide ceramic layer.
The present invention also provides and has used the resulting agricultural plough of this treatment process.
A kind of agricultural plough surface by micro-arc oxidation treatment process may further comprise the steps in order:
(1) will plough the zone of oxidation of working-surface, successively in acetone and zero(ppm) water, use ultrasonic cleaning 15min with fine sandpaper polishing removing working-surface;
(2) plough is placed the plating bath of A00 commercial-purity aluminium, in crucible oven in 730 ℃ soak 2 ~ 5min after, through 900 ℃ of DIFFUSION TREATMENT 60 ~ 70min, make the thickening of coating homogenizing;
(3) sanding and polishing is carried out with carborundum paper in the plough surface after the immersion plating, successively in acetone and zero(ppm) water, use ultrasonic cleaning 10min;
(4) plough after the immersion plating is put into working fluid; With the plough after the immersion plating is that positive pole, work nest are negative pole; And the control working temperature is 30 ℃, is that 350 ~ 450V, pulsed operation frequency are to handle 65 ~ 95min under the condition of 60 ~ 200Hz in monopulse power supply, pulsed voltage;
(5) plough of handling cleans 5 times with zero(ppm) water, promptly obtains the plough that surface by micro-arc oxidation is handled.
The described working fluid of said step (4) is an alkaline system, and every liter of alkaline system working fluid comprises 7 ~ 15g sodium aluminate, 2 ~ 10g yellow soda ash, 3 ~ 6g Pottasium Hydroxide, 1 ~ 6g water glass and 0 ~ 3g sodium dihydric hypophosphite composition.
Adopt the recirculated water cooling in the said step (4), the control electrolyte temperature is no more than 30 ℃.
The described work nest of said step (4) is to be processed by stainless steel.
The present invention has formed on the plough surface and has contained Fe
2Al
5And Al
2O
3Ceramic layer, this ceramic layer is made up of transition layer, tight zone and porous outer layer, the bonding strength on plough after this ceramic layer and immersion plating surface is greater than 45MPa; The thickness of this ceramic layer is even, can reach 25 μ m.The surface roughness Ra of this ceramic layer is about 0.3 ~ 0.45 μ m.Plough surface that surface-treated is crossed and GCr15 steel ball are to mill, and frictional coefficient is 0.18 ~ 0.4.The work-ing life of the plough that surface-treated is crossed is than improving at least 1 times the work-ing life of unmodified plough.
Working-surface hot-dip aluminizing at plough among the present invention can effectively improve the thermotolerance and the erosion resistance of plough.Simultaneously, the ceramic layer of differential arc oxidation generation can effectively improve good toughness, wear resistance and the erosion resistance of the working-surface of plough.Because coating and substrate are metallurgical binding, combine slightly height, the coating major part matrix of growing into is so the matrix dimensional change is little after the oxidation.Differential arc oxidation method among the present invention is simple, the restriction of the face shaping of not ploughed, environmentally safe.
Embodiment
The concrete steps of 1 embodiment of embodiment: the zone of oxidation of working-surface with fine sandpaper polishing removing working-surface will be ploughed in (1), successively in acetone and zero(ppm) water, use ultrasonic cleaning 15min; (2) plough is placed the plating bath of A00 commercial-purity aluminium, in crucible oven in 730 ℃ soak 2 ~ 5min after, through 900 ℃ of DIFFUSION TREATMENT 60 ~ 70min, make the thickening of coating homogenizing; (3) sanding and polishing is carried out with carborundum paper in the plough surface after the immersion plating, successively in acetone and zero(ppm) water, use ultrasonic cleaning 10min; (4) plough after the immersion plating being put into working fluid, is that positive pole, work nest are negative pole with the plough after the immersion plating, and the control working temperature is 30 ℃, is that 400V, pulsed operation frequency are to handle 95min under the condition of 200Hz in monopulse power supply, pulsed voltage; (5) plough of handling cleans 5 times with zero(ppm) water, promptly obtains the plough that surface by micro-arc oxidation is handled.Said alkaline working fluid comprises 7 ~ 15g sodium aluminate, 2 ~ 10g yellow soda ash, 3 ~ 6g Pottasium Hydroxide, 1 ~ 6g water glass and 1g sodium dihydric hypophosphite composition.The bonding strength on ceramic layer that the agricultural plough surface by micro-arc oxidation treatment process of this embodiment obtains and the surface of the plough after the immersion plating is greater than 50MPa; The thickness of this ceramic layer is even, can reach 18 μ m.The surface roughness Ra of this ceramic layer is about 0.4 μ m.Plough surface that surface-treated is crossed and GCr15 steel ball are to mill, and frictional coefficient is 0.37.
The difference of 2 embodiments of embodiment and embodiment 1 is: said alkaline working fluid comprises 7 ~ 15g sodium aluminate, 2 ~ 10g yellow soda ash, 3 ~ 6g Pottasium Hydroxide, 1 ~ 6g water glass and 0.8g sodium dihydric hypophosphite composition.The bonding strength on ceramic layer that the agricultural plough surface by micro-arc oxidation treatment process of this embodiment obtains and the surface of the plough after the immersion plating is greater than 58MPa; The thickness of this ceramic layer is even, can reach 22 μ m.The surface roughness Ra of this ceramic layer is about 0.32 μ m.Plough surface that surface-treated is crossed and GCr15 steel ball are to mill, and frictional coefficient is 0.21.
The difference of 3 embodiments of embodiment and embodiment 1 is, with the difference of step (4) among the embodiment 1 for being that 350V, pulsed operation frequency are to handle 65min under the condition of 200Hz in monopulse power supply, pulsed voltage.The bonding strength on ceramic layer that the agricultural plough surface by micro-arc oxidation treatment process of this embodiment obtains and the surface of the plough after the immersion plating is greater than 48MPa; The thickness of this ceramic layer is even, can reach 17 μ m.The surface roughness Ra of this ceramic layer is about 0.3 μ m.Plough surface that surface-treated is crossed and GCr15 steel ball are to mill, and frictional coefficient is 0.18.
Claims (6)
1. agricultural plough surface by micro-arc oxidation treatment process may further comprise the steps in order:
(1) will plough the zone of oxidation of working-surface, successively in acetone and zero(ppm) water, use ultrasonic cleaning 15min with fine sandpaper polishing removing working-surface;
(2) plough is placed the plating bath of A00 commercial-purity aluminium, in crucible oven in 730 ℃ soak 2 ~ 5min after, through 900 ℃ of DIFFUSION TREATMENT 60 ~ 70min, make the thickening of coating homogenizing;
(3) sanding and polishing is carried out with carborundum paper in the plough surface after the immersion plating, successively in acetone and zero(ppm) water, use ultrasonic cleaning 10min;
(4) plough after the immersion plating is put into working fluid; With the plough after the immersion plating is that positive pole, work nest are negative pole; And the control working temperature is 30 ℃, is that 350 ~ 450V, pulsed operation frequency are to handle 65 ~ 95min under the condition of 60 ~ 200Hz in monopulse power supply, pulsed voltage;
(5) plough of handling cleans 5 times with zero(ppm) water, promptly obtains the plough that surface by micro-arc oxidation is handled.
2. according to the described treatment process of claim 1, it is characterized in that the pretreatment process on the plough of said step (1) surface is for to remove the working-surface zone of oxidation with sand papering, then ultrasonic cleaning 15min in acetone and water successively.
3. according to the described treatment process of claim 1, it is characterized in that the treatment process on plough after the immersion plating of said step (3) surface is for to carry out sanding and polishing with carborundum paper, then ultrasonic cleaning 10min in acetone and water successively.
4. according to the described treatment process of claim 1; It is characterized in that; The working fluid of said step (4) is an alkaline system, and every liter of alkaline system working fluid comprises 7 ~ 15g sodium aluminate, 2 ~ 10g yellow soda ash, 3 ~ 6g Pottasium Hydroxide, 1 ~ 6g water glass and 0 ~ 3g sodium dihydric hypophosphite composition.
5. according to the described treatment process of claim 1, it is characterized in that adopt the recirculated water cooling in the said step (4), the control electrolyte temperature is no more than 30 ℃.
6. according to the described treatment process of claim 1, it is characterized in that the described work nest of said step (4) is to be processed by stainless steel.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105369317A (en) * | 2015-12-10 | 2016-03-02 | 苏州市嘉明机械制造有限公司 | Preparation technology of insulating thrust runner collar with long service life |
| CN106757257A (en) * | 2016-11-11 | 2017-05-31 | 佛山市三水雄鹰铝表面技术创新中心有限公司 | Oxidation trough aluminium ion and retrieval of sulfuric acid and shortening oxidation pole span energy conserving system and technique |
| CN106757256A (en) * | 2016-11-11 | 2017-05-31 | 佛山市三水雄鹰铝表面技术创新中心有限公司 | Oxidation trough aluminium ion and retrieval of sulfuric acid and use pulse power energy conserving system and technique instead |
| CN109183128A (en) * | 2018-09-06 | 2019-01-11 | 慈溪市合金属制品有限公司 | A kind of plated film intelligence alloy for kitchen Metal Structural Parts |
| CN112853247A (en) * | 2020-12-26 | 2021-05-28 | 四川添腾科技有限公司 | Surface treatment process of anti-corrosion fastener |
-
2011
- 2011-11-01 CN CN 201110337435 patent/CN102400140A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105369317A (en) * | 2015-12-10 | 2016-03-02 | 苏州市嘉明机械制造有限公司 | Preparation technology of insulating thrust runner collar with long service life |
| CN106757257A (en) * | 2016-11-11 | 2017-05-31 | 佛山市三水雄鹰铝表面技术创新中心有限公司 | Oxidation trough aluminium ion and retrieval of sulfuric acid and shortening oxidation pole span energy conserving system and technique |
| CN106757256A (en) * | 2016-11-11 | 2017-05-31 | 佛山市三水雄鹰铝表面技术创新中心有限公司 | Oxidation trough aluminium ion and retrieval of sulfuric acid and use pulse power energy conserving system and technique instead |
| CN106757257B (en) * | 2016-11-11 | 2018-07-06 | 佛山市三水雄鹰铝表面技术创新中心有限公司 | Oxidation trough aluminium ion and retrieval of sulfuric acid and shortening oxidation pole span energy conserving system and technique |
| CN109183128A (en) * | 2018-09-06 | 2019-01-11 | 慈溪市合金属制品有限公司 | A kind of plated film intelligence alloy for kitchen Metal Structural Parts |
| CN112853247A (en) * | 2020-12-26 | 2021-05-28 | 四川添腾科技有限公司 | Surface treatment process of anti-corrosion fastener |
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Application publication date: 20120404 |