CN103223457A - Application and brushing method of chilling type tellurium powder coating material - Google Patents
Application and brushing method of chilling type tellurium powder coating material Download PDFInfo
- Publication number
- CN103223457A CN103223457A CN2013101242681A CN201310124268A CN103223457A CN 103223457 A CN103223457 A CN 103223457A CN 2013101242681 A CN2013101242681 A CN 2013101242681A CN 201310124268 A CN201310124268 A CN 201310124268A CN 103223457 A CN103223457 A CN 103223457A
- Authority
- CN
- China
- Prior art keywords
- brushing
- tellurium powder
- powder coating
- coating
- sand core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium Chemical compound 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[Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 229910052714 tellurium Inorganic materials 0.000 title claims abstract description 38
- 239000011248 coating agent Substances 0.000 title claims abstract description 34
- 238000000576 coating method Methods 0.000 title claims abstract description 34
- 239000000843 powder Substances 0.000 title claims abstract description 32
- 230000001680 brushing Effects 0.000 title claims abstract description 26
- 239000000463 material Substances 0.000 title abstract description 10
- 239000004576 sand Substances 0.000 claims abstract description 16
- 239000011347 resin Substances 0.000 claims abstract description 11
- 229920005989 resin Polymers 0.000 claims abstract description 11
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- 241000005139 Lycium andersonii Species 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound 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- 238000004140 cleaning Methods 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound 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[Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000005087 graphitization Methods 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 150000002843 nonmetals Chemical class 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
Abstract
The present invention relates to an application and a brushing method of a chilling type tellurium powder coating material, belongs to the field of new material applications, and specifically to an application of the chilling type tellurium powder coating material in a resin sand core surface. The brushing method for brushing the chilling type tellurium powder coating material on the resin sand core surface comprises the following steps: (1) preparing the coating material according to a certain ratio; and (2) brushing. The chilling type tellurium powder coating material adopts an alcohol base tellurium powder coating material, and is brushed on the surface of the sand core, such that shrinkage porosity phenomenon generated on a cylinder oil channel hot spot position can disappear, wherein the brushing position forms a chilling layer with a thickness of 2-4 mm by observing a microstructure so as to effectively refine grains, and a morphology of graphite adjacent to the brushing position is transformed into a D type from an A type. In addition, during a use process, coating layer performances are stable, no phenomenon such as failure and shedding appears, phenomenon such as sand binding and sintering in water jacket is not generated, and a statistic leakage rate in a year of a cylinder is substantially reduced, wherein the leakage rate is reduced to 0.3% from the original 1.2%.
Description
Technical field
The present invention relates to the application and the brushing method of Quench type tellurium powder coating, belong to the application of new material.
Background technology
Tellurium is a kind of exotic material, is the byproduct that obtains in the refined copper process, be a kind of between metal and nonmetal between transition elements, slightly metallic luster does not possess ductility, easily pulverizes.The atomic number of tellurium is 52, and atomic weight is 127.6,452 degrees centigrade of fusing points, 1390 degrees centigrade of boiling points, density 6.25g/cm
3, be hexagoinal lattice when solid-state.It is added in the gray iron liquid of fusing can promote that metal cools off in very short time, accelerate setting rate, thereby hinder graphitization, crystal grain thinning obtains sound casting, very early since founder author just use tellurium element that the gray iron microstructure and property is improved.
The tellurium powder coating is metallurgical effect and a surface alloying action principle of utilizing tellurium, cast(ing) surface is carried out Alloying Treatment, form chill at desired cast(ing) surface, prevent that the shrinkage porosite seepage defect from appearring in foundry goods, in China's automobile manufacture industry, extensively adopt this technology, efficiently solve the shrinkage porosite leakage problems at thin-wall complicated foundry goods such as motor cylinder block oil duct position, aspect the solution foundry goods shrinkage porosite relatively more outstanding effect is being arranged.Therefore tellurium powder product obtains using comparatively widely at casting iron field, but in use still has some problems, such as: 1, tellurium powder cost height, cause product cost to increase when producing foundry goods in enormous quantities, benefit descends; 2, easily washed away in the casting process, cause losing efficacy by iron liquid; 3, the foundry goods body at brushing position is prone to sintering scab, influences the foundry goods apparent mass and increases postorder cleaning polishing amount.Therefore cause the use of tellurium powder product to have certain limitation in view of the foregoing.
Summary of the invention
The objective of the invention is to solve the weak point that above-mentioned prior art exists, provide a kind of can cost low, be difficult for being washed away, the application and the brushing method of Quench type tellurium powder coating that the casting leakage rate is low.
The present invention is achieved by the following technical solutions:
Quench type tellurium powder coating is in the application on resin sand core surface;
The brushing of Quench type tellurium powder coating is at the brushing method on resin sand core surface, and its special character is may further comprise the steps:
(1) proportioning: add industrial alcohol in the tellurium powder, it is configured to the alcohol radical tellurium powder coating that Baume degrees is 29-31, the mass fraction of tellurium is about 5%, needs coating is stirred every 2 minutes in the use, keeps away liquid layering appearance precipitation and causes density unevenness even;
(2) brushing: the thick anti-scab water based paint of dip-coating 0.1-0.2mm at first at first on the resin sand core surface of foundry goods shrinkage porosite position correspondence, oven dry is about 20 minutes under the high-temperature furnace gas about 200 ℃, the deployed tellurium powder coating of artificial then brushing, require even cover sand wicking surface, do not have and pile up and the sagging phenomenon, coating layer thickness is 0.2-0.3mm, at room temperature leaves standstill at last 1 hour, treats that its dry tack free can use.
Quench type tellurium powder coating of the present invention, what adopt is alcohol radical tellurium powder coating, cylinder-body oil duct thermal center place shrinkage porosite phenomenon is disappeared its brushing, find that by observing metallographic structure the brushing position forms the chill of 2-4mm, effectively refinement crystal grain, near graphite form changes the D type into by the A type, and use floating coat stable performance, inefficacy, obscission appear, the water jacket inner chamber does not have the scab sintering phenomenon, cylinder body year statistics percolation ratio is declined to a great extent, and drops to 0.3% by original 1.2%.
The specific embodiment
Below provide the specific embodiment of the present invention, be used for formation of the present invention is described in further detail.
Quench type tellurium powder coating is in the application on resin sand core surface;
The brushing of Quench type tellurium powder coating may further comprise the steps at the brushing method on resin sand core surface:
(1) proportioning: add industrial alcohol in the tellurium powder, it is configured to Baume degrees is 30 alcohol radical tellurium powder coating, and the mass fraction of tellurium is about 5%, needs coating is stirred every 2 minutes in the use, keeps away the liquid layering and precipitation occurs and cause density unevenness even;
(2) brushing: the thick anti-scab water based paint of dip-coating 0.2mm at first at first on the resin sand core surface of foundry goods shrinkage porosite position correspondence, oven dry is about 20 minutes under the high-temperature furnace gas about 200 ℃, the deployed tellurium powder coating of artificial then brushing, require even cover sand wicking surface, do not have and pile up and the sagging phenomenon, coating layer thickness is 0.2mm, at room temperature leaves standstill at last 1 hour, treats that its dry tack free can use.
Washed away to drop and caused the problem that lost efficacy for solving tellurium powder coating in the casting process, except in the brushing process by operation requirement carries out, we also adopt running gate system are carried out improved ancillary method: 1, change ingate position, make it away from coating, thereby reduce the coating surface flow rate of liquid, reduce the scouring force that coating is subjected to; 2, enlarge minimum choked flow sectional area, reduced to about 11s by original 15s the duration of pouring, thereby reduce the time that coating surface is washed away by iron liquid, the adhesion effect of tellurium powder coating is guaranteed.
The unspecified content of the present invention is prior art, and those skilled in the art can obtain to inspire from present embodiment and prior art, is out of shape to obtain other embodiment.Therefore, protection scope of the present invention should be determined according to the protection domain of claim.
Claims (2)
1. Quench type tellurium powder coating is in the application on resin sand core surface.
2. the brushing of Quench type tellurium powder coating is characterized in that may further comprise the steps at the brushing method on resin sand core surface:
(1) proportioning: add industrial alcohol in the tellurium powder, it is configured to the alcohol radical tellurium powder coating that Baume degrees is 29-31, the mass fraction of tellurium is about 5%, needs coating is stirred every 2 minutes in the use, keeps away liquid layering appearance precipitation and causes density unevenness even;
(2) brushing: the thick anti-scab water based paint of dip-coating 0.1-0.2mm at first at first on the resin sand core surface of foundry goods shrinkage porosite position correspondence, oven dry is about 20 minutes under the high-temperature furnace gas about 200 ℃, the deployed tellurium powder coating of artificial then brushing, require even cover sand wicking surface, do not have and pile up and the sagging phenomenon, coating layer thickness is 0.2-0.3mm, at room temperature leaves standstill at last 1 hour, treats that its dry tack free can use.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101242681A CN103223457A (en) | 2013-04-11 | 2013-04-11 | Application and brushing method of chilling type tellurium powder coating material |
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| CN2013101242681A CN103223457A (en) | 2013-04-11 | 2013-04-11 | Application and brushing method of chilling type tellurium powder coating material |
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| CN103286257A (en) * | 2013-05-30 | 2013-09-11 | 芜湖永达科技有限公司 | Technological process for treating casting surface |
| CN104128558A (en) * | 2014-08-19 | 2014-11-05 | 成都桐林铸造实业有限公司 | Casting process for solving leakage and sand bonding |
| CN104985154A (en) * | 2015-06-29 | 2015-10-21 | 安庆市吉安汽车零件锻轧有限公司 | Method for producing camshaft through chilled cast iron |
| CN106111920A (en) * | 2016-08-15 | 2016-11-16 | 合肥江淮铸造有限责任公司 | Reducing gearbox core brush coating process in one |
| CN110586851A (en) * | 2019-09-06 | 2019-12-20 | 卓然(靖江)设备制造有限公司 | Cast steel coating |
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| CN103286257A (en) * | 2013-05-30 | 2013-09-11 | 芜湖永达科技有限公司 | Technological process for treating casting surface |
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| CN106111920A (en) * | 2016-08-15 | 2016-11-16 | 合肥江淮铸造有限责任公司 | Reducing gearbox core brush coating process in one |
| CN110586851A (en) * | 2019-09-06 | 2019-12-20 | 卓然(靖江)设备制造有限公司 | Cast steel coating |
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Application publication date: 20130731 |