CN109865796A - A kind of copper alloy permanent mold foundry facing and preparation method thereof - Google Patents
A kind of copper alloy permanent mold foundry facing and preparation method thereof Download PDFInfo
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- CN109865796A CN109865796A CN201910329978.5A CN201910329978A CN109865796A CN 109865796 A CN109865796 A CN 109865796A CN 201910329978 A CN201910329978 A CN 201910329978A CN 109865796 A CN109865796 A CN 109865796A
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- copper alloy
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- bentonite
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Abstract
The present invention relates to a kind of copper alloy permanent mold foundry facings and preparation method thereof, the present invention selects talcum powder, mica powder, boron nitride powder as refractory aggregate, sodium bentonite and sodium carboxymethylcellulose are suspending agent, and waterglass and calgon are binder, water surplus.The good environmental protection of new coating of the invention, coating and die surface adhesion strength are high, preferably die surface are protected by the erosive wear of alloy melt, not extend the service life of mold；The defects of release property of casting is good, any surface finish, dense internal organization, no shrinkage cavity shrinkage porosity, stomata and cold shut effectively raises the surface quality of copper-alloy casting.
Description
Technical field
The present invention relates to non-ferrous metallurgy fields, and in particular to a kind of copper alloy permanent mold foundry facing and its preparation
Method.
Background technique
Copper and its alloy because having excellent conductive and heat-conductive Neng ﹑ ductility and corrosion resisting property, good processing performance and
Casting character, antifriction quality and wearability and it is in beautiful color the features such as, be widely used in the fields such as aviation, automobile and ocean.
Permanent mold casting is widely applied a kind of casting technique in copper alloy Foundry Production, permanent mold casting have processing performance it is high,
The advantages that dimensional accuracy is high, surface quality of continuous castings is good.But in permanent mold casting production process, because its operating condition is severe, mould
Tool mold cavity surface to bear the erosive wear of high-temperature liquid metal and the effect of thermal stress, cause die surface generate fatigue crack and
The failure modes such as erosion corrosion and premature failure, influence the normal work of mold.It is casting so improving the service life of mold
Make one of the major issue to be solved in production process.Metal-type casting coating is as raising die life and improves casting
One of key technology of defect, role can not be ignored during metal material moulding.Currently, domestic common graphite
Powder is coated on metal mold surface as copper alloy cast paint with water compo, and graphite water paint is cheap, manufacturing process
Simply, certain lubrication and demoulding can be played the role of, but coating composition is uneven, coating greasy property is poor, copper alloy casting
The problems such as part rough surface and black pollution, it is difficult to meet modern casting technique requirement.Using the cast paint of external import,
Coating property is more domestic more preferable, but price is generally higher.
Summary of the invention
The present invention is in view of the deficienciess of the prior art, develop a kind of good, at low cost, free of contamination environment-friendly type of greasy property
Coating puts forth effort to solve the problems such as copper alloy permanent mold cast paint demolding performace in production process is poor, easy to fall off and presence is polluted,
Die life and copper-alloy casting quality are helped to improve, has important meaning for the development of China's copper alloy casting field
Justice.
To achieve the above object, the present invention selects talcum powder, mica powder, boron nitride powder as refractory aggregate, Na-bentonite
Soil is suspending agent with sodium carboxymethylcellulose, and waterglass and calgon are binder, water surplus.Its component and each component
Mass percent is as follows:
Talcum powder 30 ~ 40%, mica powder 10 ~ 20%, boron nitride 5 ~ 10%, sodium bentonite 4 ~ 8%, sodium carboxymethylcellulose 0.3 ~
0.7%, waterglass 4 ~ 10%, calgon 0.8 ~ 1.6%, surplus is water.
The talcum powder, mica powder, boron nitride powder, sodium bentonite and sodium carboxymethylcellulose granularity be 200 ~
400 mesh.
Preparation method the following steps are included:
1) add water that the paste solution of 20wt% is made sodium bentonite, dissolve sodium bentonite sufficiently, standing makes to activate for 24 hours
Reaction sufficiently carries out；
2) calgon and sodium carboxymethylcellulose add water that the aqueous solution of 10wt% and 5wt% is made respectively, and stand makes it for 24 hours
Sufficiently dissolution is stand-by；
3) 10min is mixed in natrium bentonite grout and remaining water, waterglass is added and stirs evenly, adds carboxymethyl
Sodium cellulosate and sodium hexametaphosphate solution are stirred until homogeneous, and talcum powder, mica powder, boron nitride powder is added and stirs 20min, obtains copper
Alloying metal mold casting coating.
Further, the copper alloy permanent mold cast paint is applied in copper alloy manufacture field, the application packet
Include following steps:
1) preheating of metal die: metal die is preheated at 160 ~ 320 DEG C, keeps the temperature 1 ~ 3h；
2) it sprays: metal die being sprayed using spray coating method, set spray distance parameter as 10 ~ 30cm, spray gun pressure is joined
Number is set as 0.5MP.
The present invention has the advantages that coating good environmental protection of the invention, coating and die surface adhesion strength are high, preferably
Protect die surface by the erosive wear of alloy melt, not extend the service life of mold；The release property of casting is good, surface
It is bright and clean, the defects of dense internal organization, no shrinkage cavity shrinkage porosity, stomata and cold shut, effectively raise the surface matter of copper-alloy casting
Amount.
Detailed description of the invention
Fig. 1 is copper alloy water meter case produced by the invention.
Fig. 2 is the cast(ing) surface of common coating material production.
Specific embodiment
It elaborates below by way of specific embodiment to technical solution of the present invention.Following embodiment is not constituted to this
The restriction of invention.
Embodiment 1
The component and weight percent of copper alloy permanent mold cast paint: talcum powder 32%, mica powder 15%, boron nitride powder 8%, sodium
Base bentonite 4%, sodium carboxymethylcellulose 0.4%, waterglass 5%, calgon 1%, water surplus.
The preparation method is as follows:
1) add water that the paste solution of 20wt% is made sodium bentonite, dissolve sodium bentonite sufficiently, standing makes to activate for 24 hours
Reaction sufficiently carries out；
2) calgon and sodium carboxymethylcellulose add water that the aqueous solution of 10wt% and 5wt% is made respectively, and stand makes it for 24 hours
Sufficiently dissolution is stand-by；
3) 10min is mixed in natrium bentonite grout and remaining water, waterglass is added and stirs evenly, adds carboxymethyl
Sodium cellulosate and sodium hexametaphosphate solution are stirred until homogeneous, and talcum powder, mica powder, boron nitride powder is added and stirs 20min, obtains copper
Alloying metal mold casting coating.
Application method:
Metal die is preheated at 180 DEG C, keeps the temperature 3h；
Metal die is sprayed using spray coating method, sets spray distance parameter as 10cm, spray gun pressure parameter is set as
0.5MP。
Good, any surface finish using the copper-alloy casting release property of the coating material production, dense internal organization, no shrinkage cavity shrinkage porosity,
The surface quality of the defects of stomata and cold shut, copper alloy water meter case produced are high, as shown in Figure 1.And use common coating
Its surface defect of the casting of production is more serious, as shown in Figure 2.
Embodiment 2
The component and weight percent of copper alloy permanent mold cast paint: talcum powder 35%, mica powder 18%, boron nitride powder 5%, sodium
Base bentonite 6%, sodium carboxymethylcellulose 0.7%, waterglass 4%, calgon 1.3%, water surplus.
The preparation method is as follows:
1) add water that the paste solution of 20wt% is made sodium bentonite, dissolve sodium bentonite sufficiently, standing makes to activate for 24 hours
Reaction sufficiently carries out；
2) calgon and sodium carboxymethylcellulose add water that the aqueous solution of 10wt% and 5wt% is made respectively, and stand makes it for 24 hours
Sufficiently dissolution is stand-by；
3) 10min is mixed in natrium bentonite grout and remaining water, waterglass is added and stirs evenly, adds carboxymethyl
Sodium cellulosate and sodium hexametaphosphate solution are stirred until homogeneous, and talcum powder, mica powder, boron nitride powder is added and stirs 20min, obtains copper
Alloying metal mold casting coating.
Application method:
Metal die is preheated at 250 DEG C, keeps the temperature 2h；
Metal die is sprayed using spray coating method, sets spray distance parameter as 20cm, spray gun pressure parameter is set as
0.5MP。
Good, any surface finish using the copper-alloy casting release property of the coating material production, dense internal organization, no shrinkage cavity shrinkage porosity,
The surface quality of the defects of stomata and cold shut, copper alloy water meter case produced are high.
Embodiment 3
The component and weight percent of copper alloy permanent mold cast paint: talcum powder 38%, mica powder 10%, boron nitride powder 7%, sodium
Base bentonite 8%, sodium carboxymethylcellulose 0.4%, waterglass 5%, calgon 1.6%, water surplus.
The preparation method is as follows:
1) add water that the paste solution of 20wt% is made sodium bentonite, dissolve sodium bentonite sufficiently, standing makes to activate for 24 hours
Reaction sufficiently carries out；
2) calgon and sodium carboxymethylcellulose add water that the aqueous solution of 10wt% and 5wt% is made respectively, and stand makes it for 24 hours
Sufficiently dissolution is stand-by；
3) 10min is mixed in natrium bentonite grout and remaining water, waterglass is added and stirs evenly, adds carboxymethyl
Sodium cellulosate and sodium hexametaphosphate solution are stirred until homogeneous, and talcum powder, mica powder, boron nitride powder is added and stirs 20min, obtains copper
Alloying metal mold casting coating.
Application method:
Metal die is preheated at 300 DEG C, keeps the temperature 1h；
Metal die is sprayed using spray coating method, sets spray distance parameter as 30cm, spray gun pressure parameter is set as
0.5MP。
Good, any surface finish using the copper-alloy casting release property of the coating material production, dense internal organization, no shrinkage cavity shrinkage porosity,
The surface quality of the defects of stomata and cold shut, copper alloy water meter case produced are high.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with
Modification, is all covered by the present invention.
Claims (5)
1. a kind of copper alloy permanent mold cast paint, which is characterized in that by mass percentage include following component: talcum powder 30
~ 40%, mica powder 10 ~ 20%, boron nitride powder 5 ~ 10%, sodium bentonite 4 ~ 8%, sodium carboxymethylcellulose 0.3 ~ 0.7%, waterglass 4
~ 10%, calgon 0.8 ~ 1.6%, surplus is water.
2. copper alloy permanent mold cast paint according to claim 1, it is characterised in that the talcum powder, mica powder,
The granularity of boron nitride powder, sodium bentonite and sodium carboxymethylcellulose is 200 ~ 400 mesh.
3. a kind of preparation method of copper alloy permanent mold cast paint as described in claim 1, which is characterized in that including following step
It is rapid:
1) add water that the paste solution of 20wt% is made sodium bentonite, dissolve sodium bentonite sufficiently, standing makes to activate for 24 hours
Reaction sufficiently carries out；
2) calgon and sodium carboxymethylcellulose add water that the aqueous solution of 10wt% and 5wt% is made respectively, and stand makes it for 24 hours
Sufficiently dissolution is stand-by；
3) 10min is mixed in natrium bentonite grout and remaining water, waterglass is added and stirs evenly, adds carboxymethyl
Sodium cellulosate and sodium hexametaphosphate solution are stirred until homogeneous, and talcum powder, mica powder, boron nitride powder is added and stirs 20min, obtains copper
Alloying metal mold casting coating.
4. a kind of copper alloy permanent mold cast paint as described in claim 1 is in the application of copper alloy manufacture field.
5. application according to claim 4, which comprises the steps of:
1) preheating of metal die: metal die is preheated at 160 ~ 320 DEG C, keeps the temperature 1 ~ 3h；
2) it sprays: metal die being sprayed using spray coating method, set spray distance parameter as 10 ~ 30cm, spray gun pressure is joined
Number is set as 0.5MP.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2021006609A (en) * | 2019-06-28 | 2021-01-21 | スリーエム イノベイティブ プロパティズ カンパニー | Coating composition, heat-resistant coating, and method of forming the same |
| CN112496254A (en) * | 2020-11-13 | 2021-03-16 | 龙口市大川活塞有限公司 | Heat-preservation demolding coating for casting |
| CN112552013A (en) * | 2020-12-23 | 2021-03-26 | 山东鲁阳节能材料股份有限公司 | Adhesive for high-temperature self-adhesive refractory blanket, preparation method of adhesive and high-temperature self-adhesive refractory blanket |
| CN114231063A (en) * | 2022-01-11 | 2022-03-25 | 松山湖材料实验室 | Coating, preparation method thereof and method for spraying coating on metal mold cavity |
| CN115815520A (en) * | 2023-02-14 | 2023-03-21 | 中北大学 | Core coating for aluminum alloy freeze casting and preparation process thereof |
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| CN112552013A (en) * | 2020-12-23 | 2021-03-26 | 山东鲁阳节能材料股份有限公司 | Adhesive for high-temperature self-adhesive refractory blanket, preparation method of adhesive and high-temperature self-adhesive refractory blanket |
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| CN115815520A (en) * | 2023-02-14 | 2023-03-21 | 中北大学 | Core coating for aluminum alloy freeze casting and preparation process thereof |
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Application publication date: 20190611 |
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