CN105543758A - Thermal-shock-resistant wear-resistant engine cylinder inner-wall coating and preparation method thereof - Google Patents
Thermal-shock-resistant wear-resistant engine cylinder inner-wall coating and preparation method thereof Download PDFInfo
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- CN105543758A CN105543758A CN201510949105.6A CN201510949105A CN105543758A CN 105543758 A CN105543758 A CN 105543758A CN 201510949105 A CN201510949105 A CN 201510949105A CN 105543758 A CN105543758 A CN 105543758A
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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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
Abstract
The invention discloses a thermal-shock-resistant wear-resistant engine cylinder inner-wall coating. The coating is prepared from the following raw materials in parts by weight: 68-69 parts of 361 stainless steel powder, 6-6.5 parts of Mo powder, 25-26 parts of Ni60 powder, 10-11 parts of WC, 1.3-1.5 parts of zirconium oxide , 2.3-2.5 parts of yttrium oxide, 8.5-10 parts of sodium molybdate, 4.5-4.8 parts of acetic anhydride, 75-80 parts of dimethyl formamide, a defined amount of concentrated hydrochloric acid and 10-12 parts of tetrabutylammonium bromide. According to the coating, by the use of sodium molybdate, nano molybdenum particles are formed on the surface of metal powder and meanwhile nano molybdenum dioxide is attached to the surface of metal powder, so that the lubricity and bonding strength of the coating are improved, and the phenomenon that the friction coefficient is increased sharply because micro-bulges occur after metal is worn is prevented; and by the use of WC, zirconium oxide and yttrium oxide, the formation and extension of a thermal-shock crack of the coating are prevented effectively, the wear resistance is improved and the service life of a cylinder is prolonged.
Description
Technical field
The present invention relates to automobile cylinder inside coating technical field, particularly relate to a kind of heat shock resistance engine cylinder inwall wear-resistant coating and preparation method thereof.
Background technology
Energy-saving and emission-reduction have become the ultimate aim of Global Auto enterprise.According to data, in Air Pollutants Emissions CO 66%, NOx 43%, HC 31%, CO
233%, 20% discharge all coming from automobile of particulate.Automotive light weight technology is very important for save energy, minimizing exhaust gas emission.Adopt aluminium alloy engine replace gradually traditional cast iron engine be energy-saving and emission-reduction main by way of one of.But because the strength and stiffness of aluminium alloy are all lower than the performance of cast iron, conventional method inlays cast iron liners to improve its wear resistance at aluminum alloy cylinder inwall.Cast iron liners not only casting technique is complicated, and production cost is higher, and embedded cast iron liners adds weight and the size of aluminium alloy engine, is unfavorable for energy-saving and emission-reduction.At present, prepare wear-resistant coating to replace cast iron liners in aluminum alloy cylinder inner wall surface, become the main method of motor car engine lightweight development.For the combustion chamber that engine cylinder and piston form, cylinder sleeve and piston not only work at high temperature under high pressure, also will bear the sulfide (SO that fuel combustion generates
2, SO
3) and burning time the water vapor that generates and the air of suction form the heavy corrosion that sulfuric acid and sulfurous acid brings, and stainless steel has become a kind of at the preferred coating making material of aluminum alloy cylinder inner wall surface with the solidity to corrosion of its excellence, higher mechanical property and thermostability, but its wear resistance can't meet application requiring." research of engine cylinder inwall novel wear resistant coating " one literary composition by add in Stainless Steel Powder proper ratio from molten powder Ni60 and antifriction material Mo, development of new composite powder, adopt plasma spraying technology to prepare wear resistant friction reducing coating, and the performance corresponding to stainless steel coating to the hardness of coating, bonding strength and wear resistance is analyzed.By compound coating prepared by the Mo+Ni60 adding 32%, bonding strength brings up to 43.63MPa by 33.85MPa; Microhardness brings up to 464.15Hv0.1 by 337.3Hv0.1.316+Mo+Ni60 coating wear resistant friction reducing performance is obviously better than stainless steel coating, with GCr15 material secondary slip is joined to bull ring time, frictional coefficient is reduced to 0.01-0.02 by 0.04-0.05.
But along with the progress of science and technology, the requirement of people to environmental protection, the needs to automotive performance are more and more higher, the rotproofness of this coating, wear resistance, oilness, cracking resistance, hardness, thermal-shock resistance, resistance to thermooxidation, thermotolerance, still can not meet the demands, require further improvement.
Summary of the invention
The object of the invention is exactly the defect in order to make up prior art, provides a kind of heat shock resistance engine cylinder inwall wear-resistant coating and preparation method thereof.
The present invention is achieved by the following technical solutions:
A kind of heat shock resistance engine cylinder inwall wear-resistant coating, is made up of the raw material of following weight part: 316 powder of stainless steel 68-69, Mo powder 6-6.5, Ni60 powder 25-26, WC10-11, zirconium dioxide 1.3-1.5, yttrium oxide 2.3-2.5, Sodium orthomolybdate 8.5-10, acetic anhydride 4.5-4.8, dimethyl formamide 75-80, concentrated hydrochloric acid are appropriate, Tetrabutyl amonium bromide 10-12.
The preparation method of described heat shock resistance engine cylinder inwall wear-resistant coating, comprises the following steps:
(1) by Sodium orthomolybdate, acetic anhydride, dimethyl formamide mixing, adding concentrated hydrochloric acid adjust ph is 2.5-3, add Tetrabutyl amonium bromide while stirring again, be heated to 49-50 DEG C, stirring reaction 50-60 minute, add WC, zirconium dioxide, yttrium oxide again, continue stirring reaction 1-1.4 hour, obtain mixture;
(2) mixed with other remaining components by described mixture, grinding evenly, is heated to 186-195 DEG C and keeps this temperature to be evaporated completely to dimethyl formamide, then being clayed into power by gained block,
(3) by above-mentioned powder in nitrogen environment, at 500-510 DEG C, react 1.4-1.5 hour, obtain powder;
(4) powder that (3) step obtains being milled to granularity is 15-45 μm, 1-1.2 hour is dried at 80-85 DEG C, then plasma spraying is carried out, processing parameter Ar flow 45L/min, H flow 10/min, powder sending quantity 60L/min. carrier gas flux 2.5L/min, electric current 650A, power 48kW, spray is apart from 160mm.
Advantage of the present invention is: the present invention, by using Sodium orthomolybdate, forms nanometer molybdenum particle at metal powder surface, adheres to nanometer titanium dioxide molybdenum simultaneously, improve the oilness of coating, improve the bonding strength of coating simultaneously, after preventing metal to be worn, occur dimpling, cause frictional coefficient sharply to increase; By using WC, zirconium dioxide, yttrium oxide, effectively preventing the formation and spreading of the thermal shock crack of coating, improve resistance to abrasion, extending the work-ing life of cylinder.
Embodiment
A kind of heat shock resistance engine cylinder inwall wear-resistant coating, is made up of the raw material of following weight part (kilogram): 316 powder of stainless steel 68, Mo powder 6, Ni60 powder 25, WC10, zirconium dioxide 1.3, yttrium oxide 2.3, Sodium orthomolybdate 8.5, acetic anhydride 4.5, dimethyl formamide 75, concentrated hydrochloric acid are appropriate, Tetrabutyl amonium bromide 10.
The preparation method of described heat shock resistance engine cylinder inwall wear-resistant coating, comprises the following steps:
(1) by Sodium orthomolybdate, acetic anhydride, dimethyl formamide mixing, adding concentrated hydrochloric acid adjust ph is 2.5, then adds Tetrabutyl amonium bromide while stirring, be heated to 49 DEG C, stirring reaction 50 minutes, then add WC, zirconium dioxide, yttrium oxide, continue stirring reaction 1 hour, obtain mixture;
(2) mixed with other remaining components by described mixture, grinding evenly, is heated to 186 DEG C and keeps this temperature to be evaporated completely to dimethyl formamide, then being clayed into power by gained block,
(3) by above-mentioned powder in nitrogen environment, at 500 DEG C react 1.4 hours, obtain powder;
(4) powder that (3) step obtains being milled to granularity is 15 μm, dries 1 hour, then carry out plasma spraying at 80 DEG C, processing parameter Ar flow 45L/min, H flow 10/min, powder sending quantity 60L/min. carrier gas flux 2.5L/min, electric current 650A, power 48kW, spray is apart from 160mm.
By the equal compact structure of microscopic examination coating, do not have continuous hole and tiny crack, coating structure is good layered distribution, and bonding strength is 59.5MPa, and microhardness is 483.9HV0.1, and frictional coefficient is 0.007.
Claims (2)
1. a heat shock resistance engine cylinder inwall wear-resistant coating, is characterized in that being made up of the raw material of following weight part: 316 powder of stainless steel 68-69, Mo powder 6-6.5, Ni60 powder 25-26, WC10-11, zirconium dioxide 1.3-1.5, yttrium oxide 2.3-2.5, Sodium orthomolybdate 8.5-10, acetic anhydride 4.5-4.8, dimethyl formamide 75-80, concentrated hydrochloric acid are appropriate, Tetrabutyl amonium bromide 10-12.
2. the preparation method of heat shock resistance engine cylinder inwall wear-resistant coating according to claim 1, is characterized in that comprising the following steps:
(1) by Sodium orthomolybdate, acetic anhydride, dimethyl formamide mixing, adding concentrated hydrochloric acid adjust ph is 2.5-3, add Tetrabutyl amonium bromide while stirring again, be heated to 49-50 DEG C, stirring reaction 50-60 minute, add WC, zirconium dioxide, yttrium oxide again, continue stirring reaction 1-1.4 hour, obtain mixture;
(2) mixed with other remaining components by described mixture, grinding evenly, is heated to 186-195 DEG C and keeps this temperature to be evaporated completely to dimethyl formamide, then being clayed into power by gained block,
(3) by above-mentioned powder in nitrogen environment, at 500-510 DEG C, react 1.4-1.5 hour, obtain powder;
(4) powder that (3) step obtains being milled to granularity is 15-45 μm, 1-1.2 hour is dried at 80-85 DEG C, then plasma spraying is carried out, processing parameter Ar flow 45L/min, H flow 10/min, powder sending quantity 60L/min. carrier gas flux 2.5L/min, electric current 650A, power 48kW, spray is apart from 160mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510949105.6A CN105543758A (en) | 2015-12-18 | 2015-12-18 | Thermal-shock-resistant wear-resistant engine cylinder inner-wall coating and preparation method thereof |
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| CN201510949105.6A CN105543758A (en) | 2015-12-18 | 2015-12-18 | Thermal-shock-resistant wear-resistant engine cylinder inner-wall coating and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105803454A (en) * | 2016-05-10 | 2016-07-27 | 贵州大学 | Composite coating material based on 45# steel substrate and preparing method of coating |
| CN115231934A (en) * | 2022-08-16 | 2022-10-25 | 郑州振中电熔新材料有限公司 | Yttrium zirconium spraying powder and preparation method and application thereof |
Citations (3)
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| WO1998014628A1 (en) * | 1996-10-02 | 1998-04-09 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Coated wear resisting parts for internal combustion engines, specially piston rings, and method for their production |
| CN102815749A (en) * | 2012-08-08 | 2012-12-12 | 西安工程大学 | Preparation method of molybdenum dioxide nanorod |
| CN105088126A (en) * | 2015-08-13 | 2015-11-25 | 马鞍山蓝科再制造技术有限公司 | Anti-thermal-shock thermal barrier coating with low thermal conductivity and preparation method thereof |
-
2015
- 2015-12-18 CN CN201510949105.6A patent/CN105543758A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998014628A1 (en) * | 1996-10-02 | 1998-04-09 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Coated wear resisting parts for internal combustion engines, specially piston rings, and method for their production |
| CN102815749A (en) * | 2012-08-08 | 2012-12-12 | 西安工程大学 | Preparation method of molybdenum dioxide nanorod |
| CN105088126A (en) * | 2015-08-13 | 2015-11-25 | 马鞍山蓝科再制造技术有限公司 | Anti-thermal-shock thermal barrier coating with low thermal conductivity and preparation method thereof |
Non-Patent Citations (1)
| Title |
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| 肖立新等: "发动机汽缸内壁新型耐磨涂层研究", 《热喷涂技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105803454A (en) * | 2016-05-10 | 2016-07-27 | 贵州大学 | Composite coating material based on 45# steel substrate and preparing method of coating |
| CN115231934A (en) * | 2022-08-16 | 2022-10-25 | 郑州振中电熔新材料有限公司 | Yttrium zirconium spraying powder and preparation method and application thereof |
| CN115231934B (en) * | 2022-08-16 | 2023-11-03 | 郑州振中电熔新材料有限公司 | Yttrium zirconium spraying powder and preparation method and application thereof |
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Application publication date: 20160504 |