CN103016196A - Piston applicable to heavy oil - Google Patents
Piston applicable to heavy oil Download PDFInfo
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- CN103016196A CN103016196A CN2012105776541A CN201210577654A CN103016196A CN 103016196 A CN103016196 A CN 103016196A CN 2012105776541 A CN2012105776541 A CN 2012105776541A CN 201210577654 A CN201210577654 A CN 201210577654A CN 103016196 A CN103016196 A CN 103016196A
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- arc oxidation
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Abstract
The invention provides a piston applicable to heavy oil. The piston comprises a piston body and a reinforcing layer covering the head area of the piston body, wherein the piston body is made of an aluminum alloy material, and the reinforcing layer is a micro-arc oxidation layer which is 25-32 mu.m thick. The micro-arc oxidation layer is a ceramic layer which comprises aluminum oxide components, is resistant of corrosion and wear, has higher microhardness compared with the common reinforcing layer, is resistance-insulated and enables the surface of the aluminum alloy material on the head part of the piston body to be subjected to in-situ formation through arc discharge by taking the piston body as an anode in a micro-arc oxidation solution. The micro-arc oxidation solution comprises the following components in proportions: 1-5g/l of sodium hydroxide, 6-15g/l of sodium silicate, 1-4g/l of sodium tungstate, 1-4g/l of EDTA (Ethylene Diamine Tetraacetic Acid) and 0.5-1g/l of additive. The piston provided by the invention can meet the requirement of burning the heavy oil, has corrosion resistance of being 300 times of that of a piston subjected to anodic oxidation treatment and being 3600 times of that of an untreated piston.
Description
Technical field
The present invention relates to a kind of piston, especially a kind of piston that is applicable to the burning heavy oil motor.
Background technique
Heavy oil is to remain heavy oil after crude oil extracts Qi You diesel oil, and characteristics are that molecule is large, and viscosity is high, and the proportion of heavy oil is between 0.82～0.95, and specific heat is at 10,000～11,111cal/kg, and its composition mainly contains carbohydrate, sulphur, inorganic matter.In in the past 200 years, along with the world industry development, 2,466 hundred million tons of tradition petroleum production and storage amounts, nearly 45% has been exploited, and 3.4 hundred million tons of natural gas annual outputs still can not meet the demands, and medium-sized boats and ships particularly southeastern coastal areas fishing boat are all using the lower heavy oil (863,000,000,000 tons of heavy oil memory spaces) of price, heavy oil is high except viscosity, and its Sulpher content, tenor, acid content and nitrogen content are also higher.Add the fishing boat operation on the sea, during use combustion motor corrosion larger, corroding heavier is valve and piston, as the piston normal operation life-span be three months.
Piston is called as the heart of motor, and it is one of most important part in the motor.Its function is to bear gas pressure, and passes to connecting rod by wrist pin and order about crankshaft rotating, and when engine operation, piston directly reaches 2200 ℃ high-temperature gas with transient temperature and contacts, and its head temperature reaches 300 ℃ ~ 400 ℃, and temperature distributing disproportionation is spared; Piston head is bearing very large gas pressure when working stroke, requires that the piston thermal conductivity is good, thermal expansion coefficient is little; And have enough hot strengths, a wear-resisting and corrosion resisting property.Generally piston crown is carried out the processing such as anode surface composite material on the industry, but the anticorrosive effect of the present prepared piston of processing method is very little.
Development along with automobile industry, require motor to possess high-power, high moment of torsion, high output, high-temperature and high pressure of explosion, common anodizing can not satisfy the demands gradually, be mainly manifested in oxide layer hardness low, wear no resistance, friction factor is very fast to piston ring scuffing greatly; So demand adopting the above-mentioned corrosion-resistant problem of the comprehensive solution of a kind of new piston surface processing technology urgently.
Summary of the invention
The technical issues that need to address of the present invention provide a kind of piston that can make and satisfy RF requirement, have the piston of anti-corrosion capacity.
For realizing above-mentioned technical purpose, the present invention realizes by the following technical solutions: a kind of piston that is applicable to heavy oil, comprise piston only and the reinforced layer that covers the piston only upper area, described piston only is aluminum alloy material, and described reinforced layer is the differential arc oxidation layer.
Further, described differential arc oxidation layer is to include the corrosion-resistant, wear-resisting of aluminium sesquioxide composition and compare with common reinforced layer and have higher micro-penetration hardness and the ceramic layer of insulation resistance by what arc discharge made that the aluminum alloy material surface original position of piston only head forms as anode with piston only (1) in microarc oxidation solution.
Further, the component of described microarc oxidation solution comprises sodium hydroxide, sodium silicate, sodium tungstate, EDTA and additive.Additive is wherein one or both the mixing of boric acid or citric acid.
Preferably, proportioning is as follows in the component of described microarc oxidation solution, sodium hydroxide 1g/l～5g/l, sodium silicate 6 g/l ~ 15g/l, sodium tungstate 1g/l ~ 4g/l, EDTA1g/l ~ 4g/l, additive 0.5g/l ~ 1g/l.
Preferably, the parameter of described arc discharge is: current density 15～20A/dm
2, forward voltage 650 ~ 700V, negative voltage 50 ~ 80V, time 25 ~ 35min.
Further, described differential arc oxidation tunic layer thickness is 25-32 μ m.
The present invention has following beneficial effect: evidence, under equivalent environment, on following multiple different piston drips behind the acid etching liquid, 20 seconds post-etchings of pot type piston without any processing, the corrosion in 20 minutes of the piston of anodizing, the piston that differential arc oxidation is processed is gradually corrosion after 80 hours, the piston anti-corrosion capacity that differential arc oxidation is processed is brought up to 300 times of anodizing, 3600 times of piston of being untreated, so just can make piston satisfy RF requirement, have stronger anti-corrosion capacity.
Description of drawings
In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing, wherein:
Fig. 1 is piston overall structure schematic diagram of the present invention;
Among the figure, 1, piston only, 2, reinforced layer.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.But the invention is not restricted to following embodiment.
Referring to accompanying drawing 1, a kind of piston that is applicable to heavy oil comprises piston only 1 and the reinforced layer 2 that covers piston only upper area (being piston crown) outer surface, and described piston only is aluminum alloy material, and described reinforced layer 2 is the differential arc oxidation layer of aluminum alloy.Described differential arc oxidation layer is in the microarc oxidation solution that configures, adopt anode oxidation method, with piston only 1 as anode, utilize arc discharge to strengthen and the anodic oxidation reactions of activation on anode, thereby the ceramic layer that forms in the aluminum alloy material surface original position of piston only head, mainly include the aluminium sesquioxide composition in this ceramic layer, this ceramic layer is corrosion-resistant, wear-resisting, and compares with common reinforced layer and to have higher micro-penetration hardness and insulation resistance.
The component of above-mentioned microarc oxidation solution comprises sodium hydroxide, sodium silicate, sodium tungstate, EDTA and additive.Proportioning is in the component of the described microarc oxidation solution of the present embodiment: sodium hydroxide 3g/l, sodium silicate 10g/l, sodium tungstate 2.5g/l, EDTA 2.5g/l, boric acid 0.5g/l and citric acid 0.5g/l.
In the present embodiment, the parameter of described arc discharge is: current density 18A/dm
2, forward voltage 680V, negative voltage 65V, time 30min.Described differential arc oxidation tunic layer thickness is 30 μ m.
Under equivalent environment, above-mentioned piston dripped upper acid etching liquid after, do anti-corrosion comparative trial with other kind piston, its result is:
Without 20 seconds post-etchings of pot type piston of any processing, the corrosion in 20 minutes of the piston of anodizing, the piston that differential arc oxidation is processed is gradually corrosion after 80 hours.
Evidence: the piston anti-corrosion capacity that differential arc oxidation is processed is brought up to 300 times of anodizing, is 3600 times of piston of being untreated.And piston thermal conductivity of the present invention is good, thermal expansion coefficient is little; And have enough hot strengths, a wear-resisting and corrosion resisting property.
Be other several embodiments of the present invention in the following table, the corrosion resisting property index of the piston of processing through the following example all reaches above-mentioned scope of experiment.
Claims (7)
1. piston that is applicable to heavy oil comprises piston only (1) and covers the reinforced layer (2) of piston only head zone that it is characterized in that: described piston only is aluminum alloy material, and described reinforced layer (2) is the differential arc oxidation layer.
2. the piston that is applicable to heavy oil according to claim 1 is characterized in that: described differential arc oxidation layer is to include the corrosion-resistant, wear-resisting of aluminium sesquioxide composition and compare with common reinforced layer and have higher micro-penetration hardness and the ceramic layer of insulation resistance by what arc discharge made that the aluminum alloy material surface original position of piston only head forms as anode with piston only (1) in microarc oxidation solution.
3. the piston that is applicable to heavy oil according to claim 2, it is characterized in that: the component of described microarc oxidation solution comprises sodium hydroxide, sodium silicate, sodium tungstate, EDTA and additive.
4. the piston that is applicable to heavy oil according to claim 3 is characterized in that described additive is wherein one or both the mixing of boric acid or citric acid.
5. the piston that is applicable to heavy oil according to claim 4 is characterized in that proportioning is as follows in the component of described microarc oxidation solution: sodium hydroxide 1～5g/l, sodium silicate 6～15g/l, sodium tungstate 1～4g/l, EDTA 1～4g/l, additive 0.5～1g/l.
6. the piston that is applicable to heavy oil according to claim 5 is characterized in that the parameter of described arc discharge is: current density 15～20A/dm
2, forward voltage 650～700V, negative voltage 50～80V, time 25～35min.
7. each described piston that is applicable to heavy oil is characterized in that described differential arc oxidation layer thickness is 25～32 μ m according to claim 1～6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105776541A CN103016196A (en) | 2012-12-27 | 2012-12-27 | Piston applicable to heavy oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105776541A CN103016196A (en) | 2012-12-27 | 2012-12-27 | Piston applicable to heavy oil |
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| Publication Number | Publication Date |
|---|---|
| CN103016196A true CN103016196A (en) | 2013-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012105776541A Pending CN103016196A (en) | 2012-12-27 | 2012-12-27 | Piston applicable to heavy oil |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103409782A (en) * | 2013-07-29 | 2013-11-27 | 西安交通大学 | Microarc oxidation-based surface super-hydrophobicity treatment technology for aluminium material |
| CN103615337A (en) * | 2013-12-09 | 2014-03-05 | 泰州市优力克机械制造有限公司 | Natural gas engine piston |
| CN104131324A (en) * | 2014-08-12 | 2014-11-05 | 广西玉柴机器股份有限公司 | Aluminum alloy piston for internal combustion engine |
| CN105431624A (en) * | 2013-06-14 | 2016-03-23 | Ks科尔本施密特有限公司 | Method for producing an oxidation protection layer for a piston for use in internal combustion engines and piston having an oxidation protection layer |
| CN105926015A (en) * | 2016-05-12 | 2016-09-07 | 安徽纯启动力机械有限公司 | Electrochemical surface hardening treatment process of aluminum alloy die casting |
Citations (5)
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| CN1624185A (en) * | 2004-12-14 | 2005-06-08 | 东风汽车有限公司 | Surface treatment method for engine aluminum alloy piston |
| CN1651615A (en) * | 2004-12-02 | 2005-08-10 | 西安理工大学 | Heat etching proof surface treatment method of piston combustion chamber for natural gas fual engine |
| CN1851251A (en) * | 2006-05-15 | 2006-10-25 | 曲阜金皇活塞股份有限公司 | Surface-treated piston for internal combustion engine, and its preparing method |
| CN2869351Y (en) * | 2005-12-01 | 2007-02-14 | 重庆博奥实业有限公司 | Magnesium alloy piston for motorcycle engine |
| CN201068822Y (en) * | 2007-08-17 | 2008-06-04 | 石家庄金刚内燃机零部件集团有限公司 | Novel piston with ceramic film protection layer |
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2012
- 2012-12-27 CN CN2012105776541A patent/CN103016196A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1651615A (en) * | 2004-12-02 | 2005-08-10 | 西安理工大学 | Heat etching proof surface treatment method of piston combustion chamber for natural gas fual engine |
| CN1624185A (en) * | 2004-12-14 | 2005-06-08 | 东风汽车有限公司 | Surface treatment method for engine aluminum alloy piston |
| CN2869351Y (en) * | 2005-12-01 | 2007-02-14 | 重庆博奥实业有限公司 | Magnesium alloy piston for motorcycle engine |
| CN1851251A (en) * | 2006-05-15 | 2006-10-25 | 曲阜金皇活塞股份有限公司 | Surface-treated piston for internal combustion engine, and its preparing method |
| CN201068822Y (en) * | 2007-08-17 | 2008-06-04 | 石家庄金刚内燃机零部件集团有限公司 | Novel piston with ceramic film protection layer |
Non-Patent Citations (1)
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| 宣天鹏: "《表面工程技术的设计与选择》", 31 May 2011, 机械工业出版社 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105431624A (en) * | 2013-06-14 | 2016-03-23 | Ks科尔本施密特有限公司 | Method for producing an oxidation protection layer for a piston for use in internal combustion engines and piston having an oxidation protection layer |
| CN105431624B (en) * | 2013-06-14 | 2022-03-18 | Ks科尔本施密特有限公司 | Method for producing an oxidation protection layer for a piston used in an internal combustion engine and piston having an oxidation protection layer |
| CN103409782A (en) * | 2013-07-29 | 2013-11-27 | 西安交通大学 | Microarc oxidation-based surface super-hydrophobicity treatment technology for aluminium material |
| CN103409782B (en) * | 2013-07-29 | 2016-06-29 | 西安交通大学 | Aluminum surface super-hydrophobic based on micro-arc oxidation processes technique |
| CN103615337A (en) * | 2013-12-09 | 2014-03-05 | 泰州市优力克机械制造有限公司 | Natural gas engine piston |
| CN104131324A (en) * | 2014-08-12 | 2014-11-05 | 广西玉柴机器股份有限公司 | Aluminum alloy piston for internal combustion engine |
| CN105926015A (en) * | 2016-05-12 | 2016-09-07 | 安徽纯启动力机械有限公司 | Electrochemical surface hardening treatment process of aluminum alloy die casting |
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Application publication date: 20130403 |