CN103286257A - Technological process for treating casting surface - Google Patents
Technological process for treating casting surface Download PDFInfo
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- CN103286257A CN103286257A CN2013102116008A CN201310211600A CN103286257A CN 103286257 A CN103286257 A CN 103286257A CN 2013102116008 A CN2013102116008 A CN 2013102116008A CN 201310211600 A CN201310211600 A CN 201310211600A CN 103286257 A CN103286257 A CN 103286257A
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Abstract
The invention provides a technological process for treating a casing surface and belongs to the technical field of production and manufacture of casting parts. According to the technological process, industrial alcohol is added to an alcohol-based tellurium powder coating before painting the alcohol-based tellurium powder coating on a sand core surface; the alcohol-based tellurium powder coating and the industrial alcohol are prepared into a painting liquid with a baume degree of 29 to 31; the tellurium in the painting liquid accounts for 4 to 8% of the total weight of the painting liquid; while being painted on the sand core surface, the painting liquid is stirred at every 2 to 5 minutes. The technological process is improved in concentration ratio of the painting liquid, design of a casting sand mould, usage of an adhering preventing sand coating, casting temperature and setting of temperature holding time, so that a coating formed by painting the painting liquid is stable in performance and free of failure and falling off, a phenomenon that the adhering sand is sintered in an inner cavity of a casting water jacket is avoided, and the leakage rate is greatly decreased.
Description
Technical field
The invention belongs to cast member manufacturing technology field, more particularly, relate to a kind of process that cast(ing) surface is handled.
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.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 the 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 automobile manufacture industry, extensively adopt this technology to solve the shrinkage porosite leakage problems at thin-wall complicated foundry goods such as motor cylinder block oil duct position.But in use still there are 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 by iron liquid in the casting process and drop, cause losing efficacy; 3, the core cavity at brushing tellurium powder coating position is prone to sintering scab, influences the foundry goods apparent mass, and increases postorder cleaning polishing amount.
Summary of the invention
Technical problem to be solved by this invention is: at the deficiencies in the prior art, providing a kind of can guarantee to smear liquid to smear the back coating performance stable, inefficacy, obscission appear, foundry goods water jacket inner chamber does not have the scab sintering phenomenon, the process that cast(ing) surface is handled that percolation ratio obtains declining to a great extent.
Solve above-described technical problem, the technical scheme that the present invention takes is:
The present invention is a kind of process that cast(ing) surface is handled, described foundry goods cooperates casting to form by sand mo(u)ld and the core that is fixed in the sand mo(u)ld, described process comprises the processing step of the core surface being smeared alcohol radical tellurium powder coating, described alcohol radical tellurium powder coating is before smear on the core surface, earlier in alcohol radical tellurium powder coating, add industrial alcohol, it is 29-31 the liquid of smearing that alcohol radical tellurium powder coating and industrial alcohol are configured to Baume degrees, the weight accounting of smearing tellurium in the liquid is to smear 4-8% of total amount of liquid, described when smearing liquid and smearing on the core surface, stirred smearing liquid every 2-5 minutes.
Preferably, the described liquid of smearing is when smearing to the core surface, and the thick anti-scab water based paint of dip-coating 0.1-0.2mm at first on the core surface is dried 15-30min with core then under high-temperature furnace gas.
Preferably, core is manually smeared liquid on the core surface dry 15-30min under high-temperature furnace gas after, smears the even cover sand wicking surface of liquid, and the coating layer thickness of smearing liquid is 0.2-0.3mm.
Preferably, after liquid is smeared on described core surface, core was at room temperature left standstill more than 1 hour, the core dry tack free can be used.
Preferably, when described core was dried 15-30min under high-temperature furnace gas, high-temperature furnace gas was not less than 200 degrees centigrade.
Adopt technical scheme of the present invention, can obtain following beneficial effect:
The process that cast(ing) surface is handled of the present invention, improve from design, antiseized sand coating use and pouring temperature and the temperature retention time setting of baste bulk concentration proportioning, cast sand mo(u)ld, thereby can guaranteeing to smear liquid, to smear the back coating performance stable, inefficacy, obscission appear, foundry goods water jacket inner chamber does not have the scab sintering phenomenon, and percolation ratio is declined to a great extent.After adopting process of the present invention, foundry goods oil duct thermal center place shrinkage porosite phenomenon disappears, and finds 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.The stable performance of use floating coat occur to be lost efficacy, obscission, and the water jacket inner chamber does not have scab sintering phenomenon 3, the casting leakage rate is declined to a great extent, and dropped to 0.3% by original 1.2%; Process of the present invention is simultaneously being guaranteed cheaply under the situation the dynamical effect of bringing into play the tellurium powder coating.
Description of drawings
Make briefly bright to each accompanying drawing of this specification expressed content and the mark among the figure below:
Fig. 1 is the process flow diagram of the process that cast(ing) surface is handled of the present invention;
The specific embodiment
Contrast accompanying drawing below, by the description to embodiment, the effect of the mutual alignment between the shape of the specific embodiment of the present invention such as related each member, structure, the each several part and annexation, each several part and operation principle etc. are described in further detail:
As shown in Figure 1, the present invention is a kind of process that cast(ing) surface is handled, described foundry goods cooperates casting to form by sand mo(u)ld and the core that is fixed in the sand mo(u)ld, described process comprises the processing step of the core surface being smeared alcohol radical tellurium powder coating, alcohol radical tellurium powder coating is before smear on the core surface, earlier in alcohol radical tellurium powder coating, add industrial alcohol, it is 29-31 the liquid of smearing that alcohol radical tellurium powder coating and industrial alcohol are configured to Baume degrees, the weight accounting of smearing tellurium in the liquid is to smear 4-8% of total amount of liquid, described when smearing liquid and smearing on the core surface, stirred smearing liquid every 2-5 minutes, thereby avoid smearing the liquid layering and precipitation occurs, cause density unevenness even, can improve the quality when smearing.
Preferably, the described liquid of smearing is when smearing to the core surface, and the thick anti-scab water based paint of dip-coating 0.1-0.2mm at first on the core surface is dried 15-30min with core then under high-temperature furnace gas.
Preferably, described core is manually smeared liquid on the core surface dry 15-30min under high-temperature furnace gas after, requires to smear the even cover sand wicking surface of liquid, does not have and piles up and the sagging phenomenon, and the coating layer thickness of smearing liquid is 0.2-0.3mm.
Preferably, after liquid is smeared on described core surface, core was at room temperature left standstill more than 1 hour, the core dry tack free can be used, and itself and sand mo(u)ld are used, and carries out cast casting work.
Preferably, when described core was dried 15-30min under high-temperature furnace gas, high-temperature furnace gas was not less than 200 degrees centigrade.
By the position of the distance between ingate and the core, make ingate away from the coating on the core, reduce the coating surface flow rate of liquid, reduce the scouring force that coating is subjected to; Enlarge minimum choked flow sectional area reduced the duration of pouring, reduce the time that coating surface is washed away by iron liquid, tellurium powder coating adhesion effect is guaranteed.
The process that cast(ing) surface is handled of the present invention, improve from design, antiseized sand coating use and pouring temperature and the temperature retention time setting of baste bulk concentration proportioning, cast sand mo(u)ld, thereby can guaranteeing to smear liquid, to smear the back coating performance stable, inefficacy, obscission appear, foundry goods water jacket inner chamber does not have the scab sintering phenomenon, and percolation ratio is declined to a great extent.After adopting process of the present invention, foundry goods oil duct thermal center place shrinkage porosite phenomenon disappears, and finds 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.The stable performance of use floating coat occur to be lost efficacy, obscission, and the water jacket inner chamber does not have scab sintering phenomenon 3, the casting leakage rate is declined to a great extent, and dropped to 0.3% by original 1.2%; Process of the present invention is simultaneously being guaranteed cheaply under the situation the dynamical effect of bringing into play the tellurium powder coating.
By reference to the accompanying drawings the present invention has been carried out exemplary description above; obviously the concrete realization of the present invention is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present invention and technical scheme to carry out; or without improving design of the present invention and technical scheme are directly applied to other occasions, all in protection scope of the present invention.
Claims (5)
1. process that cast(ing) surface is handled, described foundry goods cooperates casting to form by sand mo(u)ld and the core that is fixed in the sand mo(u)ld, described process comprises the processing step of the core surface being smeared alcohol radical tellurium powder coating, it is characterized in that: described alcohol radical tellurium powder coating is before smear on the core surface, earlier in alcohol radical tellurium powder coating, add industrial alcohol, it is 29-31 the liquid of smearing that alcohol radical tellurium powder coating and industrial alcohol are configured to Baume degrees, the weight accounting of smearing tellurium in the liquid is to smear 4-8% of total amount of liquid, described when smearing liquid and smearing on the core surface, stirred smearing liquid every 2-5 minutes.
2. the process that cast(ing) surface is handled according to claim 1, it is characterized in that: the described liquid of smearing is when smearing to the core surface, the thick anti-scab water based paint of dip-coating 0.1-0.2mm at first on the core surface is dried 15-30min with core then under high-temperature furnace gas.
3. the process that cast(ing) surface is handled according to claim 1 and 2, it is characterized in that: described core is dried 15-30min under high-temperature furnace gas after, manually smear liquid on the core surface, smear the even cover sand wicking surface of liquid, the coating layer thickness of smearing liquid is 0.2-0.3mm.
4. the process that cast(ing) surface is handled according to claim 3, it is characterized in that: after liquid is smeared on described core surface, core was at room temperature left standstill more than 1 hour, the core dry tack free can be used.
5. the process that cast(ing) surface is handled according to claim 4, it is characterized in that: when described core was dried 15-30min under high-temperature furnace gas, high-temperature furnace gas was not less than 200 degrees centigrade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102116008A CN103286257A (en) | 2013-05-30 | 2013-05-30 | Technological process for treating casting surface |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013102116008A CN103286257A (en) | 2013-05-30 | 2013-05-30 | Technological process for treating casting surface |
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| CN103286257A true CN103286257A (en) | 2013-09-11 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104190859A (en) * | 2014-06-26 | 2014-12-10 | 芜湖市鸿坤汽车零部件有限公司 | Alcohol-based casting coating for lost foam casting and manufacturing method thereof |
| CN104209461A (en) * | 2014-09-01 | 2014-12-17 | 山西模范机械制造有限公司 | Method for producing chilled cast iron camshaft by adopting ethanol-based tellurium powder chilled paint |
| CN104232867A (en) * | 2014-09-01 | 2014-12-24 | 山西模范机械制造有限公司 | Method for producing cold-shock cast iron camshaft by using ethanol-based tellurium powder shock-cooling paint |
| 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 |
| CN105312489A (en) * | 2015-11-28 | 2016-02-10 | 西峡县西泵特种铸造有限公司 | Paint for improving inner runner flaky graphite layer of austenitic nodular iron casting and method |
| CN108723293A (en) * | 2017-04-24 | 2018-11-02 | 通用汽车环球科技运作有限责任公司 | Sand core for eliminating degeneration epidermis |
| CN110586850A (en) * | 2019-09-06 | 2019-12-20 | 邯郸慧桥复合材料科技有限公司 | Wear-resistant part casting coating |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102527924A (en) * | 2011-08-04 | 2012-07-04 | 冯英宇 | Telluro coating used for casting |
| CN102728785A (en) * | 2011-04-09 | 2012-10-17 | 山东信达汽车配件制造有限公司 | Chilling coating for lost foam casting engine block and its preparation method |
| CN103223457A (en) * | 2013-04-11 | 2013-07-31 | 芜湖乐锐思信息咨询有限公司 | Application and brushing method of chilling type tellurium powder coating material |
-
2013
- 2013-05-30 CN CN2013102116008A patent/CN103286257A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102728785A (en) * | 2011-04-09 | 2012-10-17 | 山东信达汽车配件制造有限公司 | Chilling coating for lost foam casting engine block and its preparation method |
| CN102527924A (en) * | 2011-08-04 | 2012-07-04 | 冯英宇 | Telluro coating used for casting |
| CN103223457A (en) * | 2013-04-11 | 2013-07-31 | 芜湖乐锐思信息咨询有限公司 | Application and brushing method of chilling type tellurium powder coating material |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104190859A (en) * | 2014-06-26 | 2014-12-10 | 芜湖市鸿坤汽车零部件有限公司 | Alcohol-based casting coating for lost foam casting and manufacturing method thereof |
| CN104209461A (en) * | 2014-09-01 | 2014-12-17 | 山西模范机械制造有限公司 | Method for producing chilled cast iron camshaft by adopting ethanol-based tellurium powder chilled paint |
| CN104232867A (en) * | 2014-09-01 | 2014-12-24 | 山西模范机械制造有限公司 | Method for producing cold-shock cast iron camshaft by using ethanol-based tellurium powder shock-cooling paint |
| 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 |
| CN105312489A (en) * | 2015-11-28 | 2016-02-10 | 西峡县西泵特种铸造有限公司 | Paint for improving inner runner flaky graphite layer of austenitic nodular iron casting and method |
| CN108723293A (en) * | 2017-04-24 | 2018-11-02 | 通用汽车环球科技运作有限责任公司 | Sand core for eliminating degeneration epidermis |
| CN108723293B (en) * | 2017-04-24 | 2020-10-16 | 通用汽车环球科技运作有限责任公司 | Sand casting device, forming method and automobile component using casting device |
| CN110586850A (en) * | 2019-09-06 | 2019-12-20 | 邯郸慧桥复合材料科技有限公司 | Wear-resistant part casting coating |
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Application publication date: 20130911 |