CN1256207C - Copper and copper alloy surface casting and penetrating process - Google Patents
Copper and copper alloy surface casting and penetrating process Download PDFInfo
- Publication number
- CN1256207C CN1256207C CNB021146799A CN02114679A CN1256207C CN 1256207 C CN1256207 C CN 1256207C CN B021146799 A CNB021146799 A CN B021146799A CN 02114679 A CN02114679 A CN 02114679A CN 1256207 C CN1256207 C CN 1256207C
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- copper
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- copper alloy
- heat preservation
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Abstract
The present invention relates to a copper and copper alloy casting and penetrating method which has the steps that 2 to 5% of fusing agents in weight percentage are added into alloy powder, and after uniform stirring, 3 to 8% of latex (water glass) or 2 to 5% of phenolic resin and proper amount of water are added into the mixture; the final mixture is coated on the special surface of a casting mold, and then the casting mold is put into an oven for baking; the baked casting mold is fixed in a metal mold, and after negative pressure pumping, copper or copper alloy liquid is poured on to the metal mold; after the metal liquid is solidified, the metal mold is opened immediately to take out the casting piece.
Description
Technical field
The present invention utilizes the method that casting is oozed to prepare the copper alloy surface composite.
Background technology
The eighties in 20th century casting infiltration surface modifying method that new development is got up more in the research aspect cast iron and the cast steel, as the patent No. be 89106063, name is called the patent of invention of " a kind of method that improves thickness of cast cemented alloy layer ", just on iron casting, use.Copper alloy surface method of modifying of the prior art mainly contains glow ion discharge sulfurizing, copper alloy surface siliconising (heat treatment), plasma spraying, copper alloy surface plating Ni-Fe etc., but these methods all are the after-treatment modifications that the surface of the work after moulding carries out.The present invention utilizes casting infiltration that the copper alloy workpiece is carried out surface modification, and Workpiece shaping and surface modification are once finished, and does not need expensive Special Equipment.
Summary of the invention
The present invention is a kind of copper and copper alloy surface cast-infiltration method, in alloy powder, add flux, stir, add latex or phenolic resins and an amount of water again, mix, be coated on the particular surface of casting mold, put into drying in oven then, the casting mold that oven dry is good is fixed in the metal die, takes out negative pressure, cast copper or copper alloy liquid, treat to open immediately after molten metal solidifies, take out foundry goods, waiting to ooze attaching one deck heat preservation method sheet (3) in the corresponding sand mold chamber at position before being fixed in the metal die will dry good casting mold, heat preservation method sheet (3) is by flue dust, potter's clay, wood chip, oxidant, Al adds that an amount of waterglass and the water system of mixing forms again.Heat preservation method sheet (3) is dried, and bake out temperature is controlled at 140～200 ℃, and the time is 3～4 hours.
Description of drawings
Fig. 1 is a device sketch of realizing the inventive method, and Fig. 2 is the electromicroscopic photograph of the cast(ing) surface layer tissue structure after casting is oozed.
The specific embodiment
Because the heat storage coefficient of copper alloy is little, rapid heat dissipation, for forming certain thickness casting infiltration layer on foundry goods 1 surface, at first in waiting to ooze the corresponding sand mold chamber at position, attach the certain thickness insulation material of one deck, it is heat preservation method sheet 3, to guarantee that molten metal arrives mold cavity surface and do not solidify, avoid interlayer, slag inclusion, thereby obtain qualified casting, heat preservation method sheet 3 is by flue dust, potter's clay, wood chip, oxidant, Al adds that an amount of waterglass and the water system of mixing forms again, and its thickness determines that according to thickness of workpiece heat preservation method sheet 3 will be dried, bake out temperature is controlled at 140～200 ℃, and the time is 3～4 hours; Sand mold 4,5 also will be dried, and bake out temperature determines according to desirable strength.Prepare the functional paint 2 of surface cast-infiltration then, employing is with Ni, Cr, B, Si is that main alloy powder (has wear-resisting, heat-resisting, corrosion resisting property), granularity is 70～200 orders, its manufacture craft process is as follows: at first add percentage by weight and be 2～5% flux (flux employing chloride) in alloy powder, add the phenolic resins of 3～8% latex (waterglass) or 2～5% and an amount of water after stirring again, be coated on the heat preservation method sheet 3 after mixing immediately, put into drying in oven then, bake out temperature remains on 80～180 ℃, drying time was controlled at 5～6 hours, can be fixed in the mould of taking out negative pressure by the casting mold (the technology sheet that coats coating fixes) that oven dry is good this moment, and 6 is the negative pressure pipe.Before cast, take out negative pressure and remain on-0.02～-0.08MP, then pour into a mould melted copper or copper alloy liquid, pouring temperature is controlled at 1130～1200 ℃, treats to open immediately after molten metal solidifies, and takes out foundry goods 1.
As shown in Figure 2, the workpiece that obtains by said method can be seen by electron microscopic observation obviously being divided into three zones from the cast(ing) surface layer to body portion: to strengthen the functional layer of powder; Strengthen the fused layers of powder and matrix; Based on matrix transition zone.Surface composite layer combines well with the interface of matrix, defectives such as nothing is mingled with, pore.Hardness is and the closely-related important indicator of wearability to record layer surface hardness and can reach more than the HRC50, so can utilize the method to make wear-resisting, the anti-corrosion parts of various copper materials.
The present invention utilizes casting infiltration to prepare wear-resisting, the anti-corrosion parts of copper alloy surface composite. Should Technology has following features with the whole hardening constituent ratio of foundry goods: 1. alloying element can be utilized effectively; 2. foundry goods Local surfaces has property; 3. according to this instructions for use, for obtaining surperficial optimality ergosphere, foundry goods The chemical composition of mother metal can freely be selected; 4. the thickness of surperficial particularity ergosphere and composition can be according to performance requirements Design. Compare with other surface modifying methods, take full advantage of the casting solidification waste heat, do not need special Workpiece treating apparatus, workpiece can or be strengthened and once finish by castable and surface modification.
Claims (2)
1, a kind of copper and copper alloy surface cast-infiltration method, in alloy powder, add flux, stir, add latex or phenolic resins and an amount of water again, mix, be coated on the particular surface of casting mold, put into drying in oven then, the casting mold that oven dry is good is fixed in the metal die, take out negative pressure, cast copper or copper alloy, treat to open immediately after molten metal solidifies, take out foundry goods, it is characterized in that waiting to ooze attaching one deck heat preservation method sheet (3) in the corresponding sand mold chamber at position before being fixed in the metal die will dry good casting mold, go up the functional paint that the coated surfaces casting is oozed at heat preservation method sheet (3) then, heat preservation method sheet (3) is by flue dust, potter's clay, wood chip, oxidant, Al adds that an amount of waterglass and the water system of mixing forms again.
2, copper according to claim 1 and copper alloy cast-infiltration method is characterized in that heat preservation method sheet (3) is dried, and bake out temperature is controlled at 140～200 ℃, and the time is 3～4 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021146799A CN1256207C (en) | 2002-07-03 | 2002-07-03 | Copper and copper alloy surface casting and penetrating process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021146799A CN1256207C (en) | 2002-07-03 | 2002-07-03 | Copper and copper alloy surface casting and penetrating process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1439471A CN1439471A (en) | 2003-09-03 |
| CN1256207C true CN1256207C (en) | 2006-05-17 |
Family
ID=27793358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021146799A Expired - Fee Related CN1256207C (en) | 2002-07-03 | 2002-07-03 | Copper and copper alloy surface casting and penetrating process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1256207C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103240403B (en) * | 2013-05-17 | 2016-04-13 | 江西重科机械有限公司 | A kind of surface cast-infiltration technique being applicable to fine copper tuyere cover of blast furnace |
| CN103386460B (en) * | 2013-07-22 | 2015-02-04 | 河南科技大学 | Preparation technology for gradient composite wear-resistant conical liner plate |
| CN105014006B (en) * | 2015-08-04 | 2017-04-05 | 东南大学 | A kind of casting of the aluminium alloy containing titanium dioxide is oozed with coating and the method using its preparation casting impregnation coating |
| CN104999027B (en) * | 2015-08-04 | 2017-04-12 | 东南大学 | Paint containing silicon carbide and used for aluminum alloy casting infiltration and method for preparing cast-infiltration coating by using same |
| CN105081285A (en) * | 2015-09-29 | 2015-11-25 | 河南科技大学 | Cast-infiltration method for improving surface corrosion resistance of casting |
| CN105363993A (en) * | 2015-10-21 | 2016-03-02 | 南京润屹电子科技有限公司 | Graphene enhanced cast-penetrated combination for test experimental equipment units and use method of graphene enhanced cast-penetrated combination |
-
2002
- 2002-07-03 CN CNB021146799A patent/CN1256207C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1439471A (en) | 2003-09-03 |
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