CN87105150A - The coating that is used for stud and internal densener - Google Patents
The coating that is used for stud and internal densener Download PDFInfo
- Publication number
- CN87105150A CN87105150A CN 87105150 CN87105150A CN87105150A CN 87105150 A CN87105150 A CN 87105150A CN 87105150 CN87105150 CN 87105150 CN 87105150 A CN87105150 A CN 87105150A CN 87105150 A CN87105150 A CN 87105150A
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- Prior art keywords
- stud
- coating
- internal densener
- densener
- shellac
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Abstract
The present invention is a kind of coating that is used for stud and internal densener in casting technique.This coating is formulated by shellac and alcohol.The method of using is that stud and internal densener are carried out oil removing, processing of rust removing, then with this coating brushing on stud and internal densener surface, treat can use after the alcohol volatilization is done.The great advantage of this coating is, stud and internal densener are greatly improved than tin plating technique with the mechanical strength of foundry goods fusion, and coating price is very cheap.
Description
The present invention relates to a kind of coating that is used for steel, iron casting process, specifically a kind of coating that is used for stud and interior cold steel.
In steel, iron casting process, stud and internal densener are fused to after cast in the foundry goods, promptly become the part of foundry goods.Therefore, the surface appearance of stud and internal densener has very big influence to the quality of foundry goods.For this reason, can be at surperficial coating one deck protection thing of stud and internal densener.For a long time, the traditional practice is the electroplating surfaces with tin at stud and internal densener.Because the existence of tin can form FeSn in the junction of stud and internal densener and foundry goods, thereby will cause its mechanical strength to descend, particularly to steel-casting, this influence is particularly evident.Moreover the price of tin is expensive, also is becoming tight day in the source, and this can increase the cost of foundry goods undoubtedly.In addition, under the less situation of production scale, adopt this technology also very inconvenient.
The objective of the invention is to overcome above-mentioned weak point of the prior art, and a kind of cheap, easy to use, effective coating that is used for stud and internal densener is provided.
Main points of the present invention are to use the coating of the solution of shellac and alcohol preparation as stud and internal densener.The method of preparation is: industrial shellac and alcohol are put into the container of sealing, treat moltenly can use after all.
The ratio of shellac and alcohol with brush conveniently, coating is thin and evenly be as the criterion.Generally caning be controlled in shellac weight is 5～20%.Its best proportioning is that shellac weight is 10～15%.
The using method of this coating is: stud and internal densener are carried out oil removing, processing of rust removing, then with the shellac alcoholic solution brushing for preparing on stud and internal densener surface, treat can to deposit or use after the alcohol volatilization is done.
This coating is used for respond well on stud and the internal densener, and its result of the test is as follows:
1, rust prevention test
(1) use 13%(weight) shellac alcoholic solution brushing stud and internal densener surface.
(2) stud and the internal densener after will brushing places the atmosphere midium or long term to deposit, and observes its rust-proof effect, and the result is as shown in table 1.
Table 1
| Resting period | One month | Two months | Three months | Half a year |
| Brushing once | Non-corroding | Non-corroding | Non-corroding | The trace spot corrosion |
| The brushing secondary | Non-corroding | Non-corroding | Non-corroding | Non-corroding |
The listed situation of table 1 is the test of carrying out for 3～October in the area, Xi'an.
(3) stud and the internal densener after will brushing places indoor ground, and water spray is once observed its rust-proof effect weekly, and the result is as shown in table 2.
Table 2
| One week | Two weeks | Three weeks | All around |
| Non-corroding | Non-corroding | The trace spot corrosion | Spot corrosion |
2, the contrast test of this coating and tin plating technique
Test method: this coating or zinc-plated steel plate have been brushed in vertical insertion one in the wedge test block mould that routine test is used, then molten steel is injected mould, again the wedge test block that pours into is cut into coupon, and make steel plate be positioned at the coupon central part, at last above-mentioned two kinds of coupons that are inserted with steel plate are carried out tensile test according to a conventional method with the standard coupon of not inserting steel plate.
Accompanying drawing has been represented the coupon preparation method of this test.Wherein 1-wedge test block, 2-inserts steel plate, the coupon that 3-is to be cut.
In this test, the coupon material is ZG45, and the coupon specification is 10 millimeters circular coupons; Inserting steel plate materials is the A3 steel, and thickness is 0.8 millimeter; Coating is 13%(weight) the shellac alcoholic solution.
(1) result of tensile test as shown in Figure 3.
(3) result in sampling the carrying out Metallographic Analysis of steel plate insertion position shows: the fusion of tin plate and base metal has pore and FeSn to exist.Fusion does not better have obvious transition zone between the steel plate of brushing shellac alcoholic solution and the base metal.
From above test as can be seen, this coating is used for not only having good antirust ability on stud and the internal densener, and the foundry goods matrix had no adverse effects, compare with tin plating technique, the mechanical strength of stud and internal densener and foundry goods fusion is greatly improved, and near the intensity of foundry goods matrix.Being also advantageous in that of this coating is cheap, and be easy to use.
Claims (1)
1, a kind of coating that is used for stud and internal densener in steel, iron casting process is characterized in that being made up of shellac and alcohol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87105150A CN1003218B (en) | 1987-07-23 | 1987-07-23 | Coating for core support and internal chill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87105150A CN1003218B (en) | 1987-07-23 | 1987-07-23 | Coating for core support and internal chill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87105150A true CN87105150A (en) | 1988-02-10 |
| CN1003218B CN1003218B (en) | 1989-02-08 |
Family
ID=4815216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87105150A Expired CN1003218B (en) | 1987-07-23 | 1987-07-23 | Coating for core support and internal chill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1003218B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100415840C (en) * | 2005-10-10 | 2008-09-03 | 北京科技大学 | Process for preparing environment protection coating material by lacca modifying |
| CN102357648A (en) * | 2011-10-13 | 2012-02-22 | 李华山 | Chill coating for casting |
-
1987
- 1987-07-23 CN CN87105150A patent/CN1003218B/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100415840C (en) * | 2005-10-10 | 2008-09-03 | 北京科技大学 | Process for preparing environment protection coating material by lacca modifying |
| CN102357648A (en) * | 2011-10-13 | 2012-02-22 | 李华山 | Chill coating for casting |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1003218B (en) | 1989-02-08 |
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| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |