CN102806305B - Preparation method of dope for metal type casting of magnesium alloy thin-walled component - Google Patents
Preparation method of dope for metal type casting of magnesium alloy thin-walled component Download PDFInfo
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- CN102806305B CN102806305B CN201210305826.XA CN201210305826A CN102806305B CN 102806305 B CN102806305 B CN 102806305B CN 201210305826 A CN201210305826 A CN 201210305826A CN 102806305 B CN102806305 B CN 102806305B
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- 238000005266 casting Methods 0.000 title claims abstract description 27
- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 21
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 17
- 239000002184 metal Substances 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000000843 powder Substances 0.000 claims abstract description 38
- 238000003756 stirring Methods 0.000 claims abstract description 25
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 24
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000203 mixture Substances 0.000 claims abstract description 23
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000010425 asbestos Substances 0.000 claims abstract description 15
- 229910052895 riebeckite Inorganic materials 0.000 claims abstract description 15
- 239000000440 bentonite Substances 0.000 claims abstract description 14
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 14
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 14
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 8
- 238000005303 weighing Methods 0.000 claims abstract description 6
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000011248 coating agent Substances 0.000 claims description 29
- 238000000576 coating method Methods 0.000 claims description 29
- HTSGKJQDMSTCGS-UHFFFAOYSA-N 1,4-bis(4-chlorophenyl)-2-(4-methylphenyl)sulfonylbutane-1,4-dione Chemical compound C1=CC(C)=CC=C1S(=O)(=O)C(C(=O)C=1C=CC(Cl)=CC=1)CC(=O)C1=CC=C(Cl)C=C1 HTSGKJQDMSTCGS-UHFFFAOYSA-N 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 10
- 229910052845 zircon Inorganic materials 0.000 claims description 10
- 230000007547 defect Effects 0.000 claims description 6
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract 5
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 abstract 2
- 239000000725 suspension Substances 0.000 abstract 2
- 238000000034 method Methods 0.000 description 12
- 229910000838 Al alloy Inorganic materials 0.000 description 11
- 238000010120 permanent mold casting Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000003434 inspiratory effect Effects 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 229910021652 non-ferrous alloy Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical group [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses a preparation method of a dope for metal type casting of a magnesium alloy thin-walled component. The dope comprises the following components in percentage by weight: 1.5 to 2.5 percent of kieselguhr, 2 to 3 percent of magnesium oxide powder, 1.2 to 1.8 percent of titanium dioxide powder, 1 to 2 percent of zirconite powder, 1.5 to 2.5 percent of bentonite, 2 to 4 percent of asbestos powder, 1.2 to 1.4 percent of silica sol and the balance of alcohol. The preparation method comprises the following steps of 1) weighing the materials according to the proportion; 2) taking 30 percent of the total alcohol, adding the bentonite into the alcohol, stirring until the bentonite is suspended, sequentially adding the magnesium oxide powder, the titanium dioxide powder and the zirconite powder into the suspension, and stirring the suspension for about 15 to 25 minutes to uniformly mix the materials and obtain a mixture I; 3) mixing and stirring the kieselguhr, the asbestos powder and the silica sol for about 10 to 20 minutes, adding 20 percent of the total alcohol into the mixture, and stirring the materials for about 5 to 15 minutes to uniformly mix the materials and obtain a mixture II; and 4) mixing the mixture I, the mixture II and 50 percent of residual alcohol, and stirring the materials for about 20 to 30 minutes to obtain the dope.
Description
Technical field
The present invention relates to casting field, particularly a kind of preparation method of magnesium alloy thin wall pieces coating for metal mold casting.
Background technology
Permanent mold casting is also known as diecasting, and it is that liquid metals is poured into metal mold, to obtain a kind of casting method of foundry goods.Casting mold makes with metal, can Reusability repeatedly (hundreds of time to several thousand times).Permanent mold casting is fertile foundry goods at present, and have certain restriction in weight and vpg connection, the weight as foundry goods can not be too large; Wall thickness is also restricted, and less casting section thickness is also difficult to cast out.
Magnesium alloy thin wall pieces in permanent mold casting process because cooling velocity is fast, easily in foundry goods, form the defects such as cold shut, pin hole and shrinkage porosite and foundry goods is scrapped, therefore, the quality how improving Mg alloy thin wall permanent mold casting foundry goods is the problem that casting research worker is devoted to study always.The patent No. is that the Chinese invention patent " metal mold casting of aluminum alloy thin-walled piece enthalpy changing coating " of ZL03108033.2 proposes a kind of enthalpy changing coating being applicable to metal mold casting of aluminum alloy thin-walled piece, by the exothermic reaction of coating, and improve the mold-filling capacity of aluminum alloy thin wall pieces, the phenomenon of cold shut and the misrun formed in foundry goods can be solved, thus improve the quality of aluminum alloy thin wall pieces.Meanwhile, due to the exothermic reaction of coating, the shrinkage defect of aluminum alloy thin wall pieces also can be alleviated to a certain extent.But the carrier fluid due to this enthalpy changing coating is water, in the exothermal reaction process of coating, water produces gasification due to the heat of releasing, not easily discharge in thin-walled die cavity at once, easily assemble at thin wall component, thus making aluminium alloy in casting process, these aqueous vapors are absorbed in aluminium alloy castings and form needle pore defect." casting handbook " the 3rd volume (casting nonferrous alloy, casting branch of Chinese Mechanical Engineering Society compiles, China Machine Press, 2006) a kind of coating of aluminium alloy thin-walled foundry goods working surface of mould cavity is proposed in, its main refractory aggregate composition is zinc oxide, titanium dioxide, flake asbestos, binding agent is waterglass, and carrier fluid is water.
Publication number is that the Chinese invention patent application of CN102145372A discloses and also discloses a kind of metal mold casting of aluminum alloy thin-walled piece coating.
Visible, in prior art for the coating of thin-wall part metal mold all for Birmasil, and for the report that rarely has of magnesium alloy, due to the nature difference of magnesium alloy and aluminium alloy, cause the thin-wall part metal-type casting coating for aluminium alloy of the prior art to be directly applied to magnesium alloy, therefore, a kind of coating for metal mold casting being suitable for magnesium alloy thin wall pieces of exploitation is needed badly.
Summary of the invention
For the deficiencies in the prior art, an object of the present invention is the preparation method providing a kind of magnesium alloy thin wall pieces coating for metal mold casting, and the casting flaw of the magnesium alloy thin wall pieces using this coating to cast is reduced.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of preparation method of magnesium alloy thin wall pieces coating for metal mold casting, described coating is made up of following component by weight percentage: diatomite 1.5-2.5%, magnesia powder 2-3%, titanium dioxide powder 1.2-1.8%, zircon powder 1-2%, bentonite 1.5-2.5%, flake asbestos 2-4%, Ludox 1.2-1.4%, surplus is alcohol, and described preparation method comprises the steps:
1) weighing and burden is carried out by said ratio;
2) get the alcohol of alcohol gross weight 30%, add bentonite, stir and make it suspend, then add MgO powder, TiO successively
2powder and zircon powder, stir about 15-25 minute, makes it even, obtains compound I;
3) diatomite, flake asbestos and Ludox are carried out mix and blend and be about 10-20 minute, add the alcohol of alcohol gross weight 20%, then stir about 5-15 minute, make it mix, obtain compound II;
4) compound I and compound II is mixed with the alcohol of remaining alcohol gross weight 50%, then stir about 20-30 minute.
The present invention has following beneficial effect:
1) the present invention adopts diatomite, flake asbestos and magnesium oxide particle matched combined, and aggregate good heat insulating, resistance to fire intensity are high, and the cavity filling of magnesium alloy can be improved, and feeding is good, thus reduces defect.
2) with the addition of appropriate bentonite in coating, make it have certain suspendability, make this being coated with property of coating good, and easily preserve.
3) carrier fluid of coating is alcohol, the moisture containing minute quantity, and volatilization is exceedingly fast, in thin-walled die cavity, not easily form the gathering of gas, greatly reduce the inspiratory capacity in Mg alloy thin wall casting pouring process, thus decrease the defect level of pin hole, improve the quality of Mg alloy thin wall foundry goods.
4) preparation method is sub-category, mixes step by step, makes the performance stable homogeneous of coating, easily uses and store.
Detailed description of the invention
Embodiment one
A kind of preparation method of magnesium alloy thin wall pieces coating for metal mold casting, described coating is made up of following component by weight percentage: diatomite 1.5%, magnesia powder 3%, titanium dioxide powder 1.2%, zircon powder 2%, bentonite 1.5%, flake asbestos 4%, Ludox 1.2%, surplus is alcohol, and described preparation method comprises the steps:
1) weighing and burden is carried out by said ratio;
2) get the alcohol of alcohol gross weight 30%, add bentonite, stir and make it suspend, then add MgO powder, TiO successively
2powder and zircon powder, stir 15 minutes, makes it even, obtain compound I;
3) diatomite, flake asbestos and Ludox are carried out mix and blend 20 minutes, add the alcohol of alcohol gross weight 20%, then stir 5 minutes, make it mix, obtain compound II;
4) compound I and compound II is mixed with the alcohol of remaining alcohol gross weight 50%, then stir 30 minutes.
Embodiment two
A kind of preparation method of magnesium alloy thin wall pieces coating for metal mold casting, described coating is made up of following component by weight percentage: diatomite 2.5%, magnesia powder 2%, titanium dioxide powder 1.8%, zircon powder 1%, bentonite 2.5%, flake asbestos 2%, Ludox 1.4%, surplus is alcohol, and described preparation method comprises the steps:
1) weighing and burden is carried out by said ratio;
2) get the alcohol of alcohol gross weight 30%, add bentonite, stir and make it suspend, then add MgO powder, TiO successively
2powder and zircon powder, stir 25 minutes, makes it even, obtain compound I;
3) diatomite, flake asbestos and Ludox are carried out mix and blend 10 minutes, add the alcohol of alcohol gross weight 20%, then stir 15 minutes, make it mix, obtain compound II;
4) compound I and compound II is mixed with the alcohol of remaining alcohol gross weight 50%, then stir 20 minutes.
Embodiment three
A kind of preparation method of magnesium alloy thin wall pieces coating for metal mold casting, described coating is made up of following component by weight percentage: diatomite 2.0%, magnesia powder 2.5%, titanium dioxide powder 1.5%, zircon powder 1.5%, bentonite 2.0%, flake asbestos 3.0%, Ludox 1.3%, surplus is alcohol, and described preparation method comprises the steps:
1) weighing and burden is carried out by said ratio;
2) get the alcohol of alcohol gross weight 30%, add bentonite, stir and make it suspend, then add MgO powder, TiO successively
2powder and zircon powder, stir 20 minutes, makes it even, obtain compound I;
3) diatomite, flake asbestos and Ludox are carried out mix and blend 15 minutes, add the alcohol of alcohol gross weight 20%, then stir 10 minutes, make it mix, obtain compound II;
4) compound I and compound II is mixed with the alcohol of remaining alcohol gross weight 50%, then stir 25 minutes.
Applicant states, the present invention illustrates detailed process equipment and process flow process of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned detailed process equipment and process flow process, namely do not mean that the present invention must rely on above-mentioned detailed process equipment and process flow process and could implement.Person of ordinary skill in the field should understand, any improvement in the present invention, to equivalence replacement and the interpolation of auxiliary element, the concrete way choice etc. of each raw material of product of the present invention, all drops within protection scope of the present invention and open scope.
Claims (1)
1. the preparation method of a magnesium alloy thin wall pieces coating for metal mold casting, it is characterized in that, described coating is made up of following component by weight percentage: diatomite 1.5-2.5%, magnesia powder 2-3%, titanium dioxide powder 1.2-1.8%, zircon powder 1-2%, bentonite 1.5-2.5%, flake asbestos 2-4%, Ludox 1.2-1.4%, surplus is alcohol, adopt diatomite, flake asbestos and magnesium oxide particle matched combined, aggregate good heat insulating, resistance to fire intensity are high, and the cavity filling of magnesium alloy can be improved, feeding is good, thus reduces defect; Described preparation method comprises the steps:
1) weighing and burden is carried out by said ratio;
2) get the alcohol of alcohol gross weight 30%, add bentonite, stir and make it suspend, then add MgO powder, TiO successively
2powder and zircon powder, stir about 15-25 minute, makes it even, obtains compound I;
3) diatomite, flake asbestos and Ludox are carried out mix and blend and be about 10-20 minute, add the alcohol of alcohol gross weight 20%, then stir about 5-15 minute, make it mix, obtain compound II;
4) compound I and compound II is mixed with the alcohol of remaining alcohol gross weight 50%, then stir about 20-30 minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210305826.XA CN102806305B (en) | 2012-08-24 | 2012-08-24 | Preparation method of dope for metal type casting of magnesium alloy thin-walled component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210305826.XA CN102806305B (en) | 2012-08-24 | 2012-08-24 | Preparation method of dope for metal type casting of magnesium alloy thin-walled component |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102806305A CN102806305A (en) | 2012-12-05 |
| CN102806305B true CN102806305B (en) | 2015-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210305826.XA Active CN102806305B (en) | 2012-08-24 | 2012-08-24 | Preparation method of dope for metal type casting of magnesium alloy thin-walled component |
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| CN113333666B (en) * | 2021-06-08 | 2022-08-19 | 安徽信息工程学院 | Wear-resistant casting coating composition and preparation method thereof |
Citations (8)
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|---|---|---|---|---|
| CN1390661A (en) * | 2002-07-25 | 2003-01-15 | 上海交通大学 | Paint for casting Mg alloy with metal mould and its preparing process |
| CN101342570A (en) * | 2007-07-12 | 2009-01-14 | 中宏（天津）实业有限公司 | Preparation method for magnesium alloy cast paint |
| JP4309712B2 (en) * | 2003-07-30 | 2009-08-05 | 株式会社木村鋳造所 | Full mold casting method |
| CN101658899A (en) * | 2009-09-17 | 2010-03-03 | 上海交通大学 | Magnesium-alloy metal-type casting coating and preparation method thereof |
| CN101985156A (en) * | 2010-11-08 | 2011-03-16 | 哈尔滨理工大学 | Alcohol-based coating for magnesium alloy casting and processing method thereof |
| CN102145372A (en) * | 2011-03-15 | 2011-08-10 | 上海爱尔思轻合金制品有限公司 | Coating for metal mold casting of aluminum alloy thin-walled piece and preparation method and coating method thereof |
| JP2011167739A (en) * | 2010-02-19 | 2011-09-01 | Kyodo Yushi Co Ltd | Nonferrous metal die casting mold release agent |
| CN102430701A (en) * | 2011-11-29 | 2012-05-02 | 朱小英 | Coating for metal low pressure casting of magnesium alloy |
-
2012
- 2012-08-24 CN CN201210305826.XA patent/CN102806305B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1390661A (en) * | 2002-07-25 | 2003-01-15 | 上海交通大学 | Paint for casting Mg alloy with metal mould and its preparing process |
| JP4309712B2 (en) * | 2003-07-30 | 2009-08-05 | 株式会社木村鋳造所 | Full mold casting method |
| CN101342570A (en) * | 2007-07-12 | 2009-01-14 | 中宏（天津）实业有限公司 | Preparation method for magnesium alloy cast paint |
| CN101658899A (en) * | 2009-09-17 | 2010-03-03 | 上海交通大学 | Magnesium-alloy metal-type casting coating and preparation method thereof |
| JP2011167739A (en) * | 2010-02-19 | 2011-09-01 | Kyodo Yushi Co Ltd | Nonferrous metal die casting mold release agent |
| CN101985156A (en) * | 2010-11-08 | 2011-03-16 | 哈尔滨理工大学 | Alcohol-based coating for magnesium alloy casting and processing method thereof |
| CN102145372A (en) * | 2011-03-15 | 2011-08-10 | 上海爱尔思轻合金制品有限公司 | Coating for metal mold casting of aluminum alloy thin-walled piece and preparation method and coating method thereof |
| CN102430701A (en) * | 2011-11-29 | 2012-05-02 | 朱小英 | Coating for metal low pressure casting of magnesium alloy |
Non-Patent Citations (1)
| Title |
|---|
| 《镁合金金属型涂料的研究》;张亮;《中国优秀硕士学位论文全文数据库工程科技I辑2010年第10期》;20101015(第10期);第11-19页 * |
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| CN102806305A (en) | 2012-12-05 |
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