CN1390661A - Paint for casting Mg alloy with metal mould and its preparing process - Google Patents
Paint for casting Mg alloy with metal mould and its preparing process Download PDFInfo
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- CN1390661A CN1390661A CN 02136198 CN02136198A CN1390661A CN 1390661 A CN1390661 A CN 1390661A CN 02136198 CN02136198 CN 02136198 CN 02136198 A CN02136198 A CN 02136198A CN 1390661 A CN1390661 A CN 1390661A
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- magnesium
- alloy
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- type casting
- coating
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Abstract
A casting paint for casting Mg alloy with metal mould is prepared from talc powder (3-8 mass%), diatomite (2-5), adhesive (1.5-4), suspending agent (0.3-2), flame retarding agnet (2-7) and water (75-90). Said adhesive may be water glass, silica sol, or aluminium phosphate. Said suspending agent may be attapulgite clay or palygorskite clay. Said flame-retarding agent may be NH4BF4, KBF4, etc. Its advantages are high performance, not easy deposition and smooth surface of casting.
Description
Technical field:
What the present invention relates to is a kind of magnesium-alloy metal-type casting coating, and especially a kind of magnesium-alloy metal-type casting coating and preparation method with strong heat insulating ability, anti-flammability, caking property and coating belongs to metal material and metallurgical class field.
Background technology:
Because the chemical property of magnesium is very active, liquid magnesium very easily with atmosphere in oxygen, nitrogen and casting mold in water react.The density coefficient of skins covering of the surface such as the magnesia that reaction result generates, magnesium nitride is very low, poor thermal conductivity, a large amount of heats that reaction is emitted can not distribute rapidly, cause the temperature on the reaction interface to raise rapidly, temperature raises and has quickened the oxidation of magnesium again, the burning of aggravation magnesium.As a result, hole or oxidation elephant skin occur at cast(ing) surface, foundry goods is scrapped when serious.Therefore prevent that the burning of magnesium alloy in casting mold is to improve one of the key technology of Mg alloy castings quality (Hu Zhong, almag casting technique and quality control, Beijing: aircraft industry publishing house, 1990) in the casting process.
On the other hand,, be prone to thermal fragmentation defect in the casting process, so magnesium alloy coating should have heat-insulating property preferably, to strengthen the feeding in the magnesium alloy in course of solidification because the contraction of magnesium alloy is big.In a word, magnesium-alloy metal-type casting coating should help preventing the burning in casting mold in the magnesium alloy pouring process, and heat-insulating property, caking property and coating preferably should be arranged again.The coating that current magnesium alloy production is used is used the coating of aluminium alloy mostly, and the magnesium alloy special coating is few, and the magnesium foundry goods often produces decrepitation in the use.
Summary of the invention:
The objective of the invention is at the deficiencies in the prior art and magnesium alloy cast characteristics, a kind of novel magnesium alloy metal-type casting coating and preparation method are proposed, obtain having excellent flame retardancy, the magnesium alloy special-purpose metal mold casting coating of heat insulating ability, caking property and coating so that further obtain the high-quality Mg alloy castings of no hot tearing, any surface finish, non-oxidation elephant skin.
For realizing such purpose, magnesium-alloy metal-type casting coating provided by the invention is adjusted on the composition of the aggregate of coating, binding agent, suspending agent etc., has also added a certain amount of fire retardant in composition.Concrete composition quality percentage is: talcum powder 3-8%, diatom scholar 2-5%, binding agent 1.5-4%, suspending agent 0.3-2%, fire retardant 2-7% and water 75-90%.Binding agent can be waterglass, Ludox or aluminum phosphate etc.Suspending agent can be attapulgite clay, palygorskite clay etc.Fire retardant can be NH
4BF
4, KBF
4, sodium alkyl sulfonate and boric acid etc.
The preparation method of magnesium-alloy metal-type casting coating is characterized in that earlier suspending agent being mixed 10-30 part water in colloid mill or ball mill milling 1-5 hour, makes first liquid.Again talcum powder, diatomite and fire retardant are put into colloid mill or ball mill, added first liquid, binding agent and water milling respectively 1-3 hour, get final product magnesium-alloy metal-type casting coating.
During use, metal die is heated to about 150-300 ℃, adopts the method for spraying to be coated with the thick magnesium alloy cast paint of extension one deck 0.05～0.3mm on the metal die surface, can use after the oven dry.
Magnesium-alloy metal-type casting coating provided by the invention has significant advantage, has stronger heat insulating ability, anti-flammability, caking property and coating, and has good suspension, is difficult for precipitation in the use.This coating has significantly reduced the hot cracking tendency of permanent mold casting Mg alloy castings.During cast; this coating has formed one deck restitutive protection atmosphere between casting mold-magnesium liquid interface; and make Mg alloy surface form one deck compact protective film; the carrying out that has stoped oxidation; prevent the burning of when cast magnesium alloy in casting mold, helped obtaining the Mg alloy castings of any surface finish, non-oxidation elephant skin.
The specific embodiment:
Below by specific embodiment technical scheme of the present invention is further described.
Embodiment 1:
Magnesium-alloy metal-type casting coating composition (mass percent): talcum powder 6%, diatom scholar 2%, waterglass 3%, attapulgite clay 0.3%, sodium alkyl sulfonate 0.2%, boric acid 3% and water 85.5%.
Attapulgite clay is mixed 10 parts of water milling 2 hours in colloid mill or ball mill, make first liquid.Again talcum powder, diatomite, sodium alkyl sulfonate and boric acid are put into colloid mill or ball mill, added first liquid, waterglass and water milling respectively 2 hours, get final product magnesium-alloy metal-type casting coating.
During use, metal die is heated to about 250 ℃, adopts the method for spraying to be coated with the thick magnesium alloy cast paint of extension one deck 0.1mm on the metal die surface, can use after the oven dry.This coating has prevented the burning of when cast magnesium alloy in casting mold, has obtained the Mg alloy castings of no hot tearing, any surface finish, non-oxidation elephant skin.
Embodiment 2:
Magnesium-alloy metal-type casting coating composition (mass percent): talcum powder 3%, diatom scholar 4%, Ludox 4%, palygorskite clay 0.8%, NH
4BF
40.6%, boric acid 3% and water 84.6%.
Palygorskite clay is mixed 20 parts of water milling 3 hours in colloid mill or ball mill, make first liquid.Again with talcum powder, diatomite, NH
4BF
4Put into colloid mill or ball mill with boric acid, added first liquid, Ludox and water milling respectively 2 hours, get final product magnesium-alloy metal-type casting coating.
During use, metal die is heated to about 200 ℃, adopts the method for spraying to be coated with the thick magnesium alloy cast paint of extension one deck 0.2mm on the metal die surface, can use after the oven dry.This coating has prevented the burning of when cast magnesium alloy in casting mold, has obtained the Mg alloy castings of no hot tearing, any surface finish, non-oxidation elephant skin.
Embodiment 3:
Magnesium-alloy metal-type casting coating composition (mass percent): talcum powder 5%, diatom scholar 3%, Ludox 3%, aluminum phosphate 1%, palygorskite clay 0.7%, KBF
40.5%, sodium alkyl sulfonate 2% and water 84.8%.
Palygorskite clay is mixed 20 parts of water milling 3 hours in colloid mill or ball mill, make first liquid.Again with talcum powder, diatomite, KBF
4, sodium alkyl sulfonate puts into colloid mill or ball mill, adds first liquid, Ludox, aluminum phosphate and water milling respectively 3 hours, get final product magnesium-alloy metal-type casting coating.
During use, metal die is heated to about 200 ℃, adopts the method for spraying to be coated with the thick magnesium alloy cast paint of extension one deck 0.15mm on the metal die surface, can use after the oven dry.This coating has prevented the burning of when cast magnesium alloy in casting mold, has obtained the Mg alloy castings of no hot tearing, any surface finish, non-oxidation elephant skin.
Claims (5)
1, a kind of magnesium-alloy metal-type casting coating is characterized in that composition quality percentage is: talcum powder 3-8%, diatom scholar 2-5%, binding agent 1.5-4%, suspending agent 0.3-2%, fire retardant 2-7% and water 75-90%.
2,, it is characterized in that binding agent is waterglass, Ludox or aluminum phosphate as the said magnesium-alloy metal-type casting coating of claim 1.
3,, it is characterized in that suspending agent is attapulgite clay, palygorskite clay as the said magnesium-alloy metal-type casting coating of claim 1.
4,, it is characterized in that fire retardant is NH as the said magnesium-alloy metal-type casting coating of claim 1
4BF
4, KBF
4, sodium alkyl sulfonate and boric acid.
5, a kind of preparation method as the said magnesium-alloy metal-type casting coating of claim 1, it is characterized in that earlier suspending agent being mixed 10-30 part water in colloid mill or ball mill milling 1-5 hour, make first liquid, again talcum powder, diatomite and fire retardant are put into colloid mill or ball mill, added first liquid, binding agent and water milling respectively 1-3 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021361983A CN1164385C (en) | 2002-07-25 | 2002-07-25 | Paint for casting Mg alloy with metal mould and its preparing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021361983A CN1164385C (en) | 2002-07-25 | 2002-07-25 | Paint for casting Mg alloy with metal mould and its preparing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1390661A true CN1390661A (en) | 2003-01-15 |
| CN1164385C CN1164385C (en) | 2004-09-01 |
Family
ID=4748547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021361983A Expired - Fee Related CN1164385C (en) | 2002-07-25 | 2002-07-25 | Paint for casting Mg alloy with metal mould and its preparing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1164385C (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100347257C (en) * | 2006-03-16 | 2007-11-07 | 沈阳金安铸造材料厂 | Water-based dipping paint without pollution |
| CN101879578A (en) * | 2010-06-18 | 2010-11-10 | 中国兵器工业第五二研究所 | Mold release agent for rare-earth magnesium alloy pressure casting and prepration method thereof |
| CN102430701A (en) * | 2011-11-29 | 2012-05-02 | 朱小英 | Coating for metal low pressure casting of magnesium alloy |
| CN102675938A (en) * | 2012-05-10 | 2012-09-19 | 中南林业科技大学 | Hydrophobic silicate fireproof coating and preparation method thereof |
| CN102744362A (en) * | 2012-07-26 | 2012-10-24 | 珠海市斗门福联造型材料实业有限公司 | Alcohol group casting coating with both dry-wet indication function and sintering peeling function and production process thereof |
| CN102806305A (en) * | 2012-08-24 | 2012-12-05 | 朱小英 | Preparation method of dope for metal type casting of magnesium alloy thin-walled component |
| CN102806306A (en) * | 2012-08-24 | 2012-12-05 | 朱小英 | Coating for metal mold casting of magnesium alloy thin-wall parts |
| CN101773980B (en) * | 2010-02-19 | 2013-02-06 | 南通爱尔思轻合金精密成型有限公司 | Alcohol group mould coating used for low-pressure casting of aluminum alloy sand mold and coating process thereof |
| CN102921880A (en) * | 2012-11-07 | 2013-02-13 | 徐州鹏举金鱼草工艺品有限公司 | Water-based paint for iron casting through lost foam casting die |
| WO2013044904A1 (en) * | 2011-09-30 | 2013-04-04 | Ask Chemicals Gmbh | Coating compositions for inorganic casting moulds and cores and use thereof and method for sizing |
| CN105127365A (en) * | 2015-08-31 | 2015-12-09 | 宁夏共享化工有限公司 | Color-changing casting coating capable of indicating moisture change during drying coating and preparation method thereof |
| CN105583356A (en) * | 2016-01-19 | 2016-05-18 | 中北大学 | Preparation method of coating for casting magnesium alloy lost foam |
| CN105772624A (en) * | 2016-04-27 | 2016-07-20 | 霍邱县鑫瑞金属制品有限责任公司 | Glass-powder-contained high-breathability water-base expendable pattern casting coating for magnesium alloy casting and preparing method for glass-powder-contained high-breathability water-base expendable pattern casting coating for magnesium alloy casting |
| CN106367173A (en) * | 2016-08-29 | 2017-02-01 | 遵义航天新力精密铸锻有限公司 | Preparation and usage method of protective lubricant for forging |
| CN107052230A (en) * | 2017-05-27 | 2017-08-18 | 大连理工大学 | A kind of alcohol radical anti-flaming dope for improving magnesium alloy mold-filling capacity and preparation method thereof |
| CN107083083A (en) * | 2017-04-11 | 2017-08-22 | 石家庄钢铁有限责任公司 | A kind of coating for preventing that low Ni descaling of steel stock is not net and application method and application |
| CN115055642A (en) * | 2022-05-26 | 2022-09-16 | 西北工业大学 | Method for combined flame retardance and oxidation resistance of 3DP sand magnesium alloy castings |
-
2002
- 2002-07-25 CN CNB021361983A patent/CN1164385C/en not_active Expired - Fee Related
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100347257C (en) * | 2006-03-16 | 2007-11-07 | 沈阳金安铸造材料厂 | Water-based dipping paint without pollution |
| CN101773980B (en) * | 2010-02-19 | 2013-02-06 | 南通爱尔思轻合金精密成型有限公司 | Alcohol group mould coating used for low-pressure casting of aluminum alloy sand mold and coating process thereof |
| CN101879578A (en) * | 2010-06-18 | 2010-11-10 | 中国兵器工业第五二研究所 | Mold release agent for rare-earth magnesium alloy pressure casting and prepration method thereof |
| CN101879578B (en) * | 2010-06-18 | 2012-06-27 | 中国兵器工业第五二研究所 | Mold release agent for rare-earth magnesium alloy pressure casting and prepration method thereof |
| WO2013044904A1 (en) * | 2011-09-30 | 2013-04-04 | Ask Chemicals Gmbh | Coating compositions for inorganic casting moulds and cores and use thereof and method for sizing |
| CN103826775A (en) * | 2011-09-30 | 2014-05-28 | Ask化学品股份有限公司 | Coating compositions for inorganic casting moulds and cores and use thereof and method for sizing |
| CN102430701A (en) * | 2011-11-29 | 2012-05-02 | 朱小英 | Coating for metal low pressure casting of magnesium alloy |
| CN102430701B (en) * | 2011-11-29 | 2013-06-05 | 宁波兴柯汽车新材料科技有限公司 | Coating for metal low pressure casting of magnesium alloy |
| CN102675938A (en) * | 2012-05-10 | 2012-09-19 | 中南林业科技大学 | Hydrophobic silicate fireproof coating and preparation method thereof |
| CN102744362A (en) * | 2012-07-26 | 2012-10-24 | 珠海市斗门福联造型材料实业有限公司 | Alcohol group casting coating with both dry-wet indication function and sintering peeling function and production process thereof |
| CN102806306A (en) * | 2012-08-24 | 2012-12-05 | 朱小英 | Coating for metal mold casting of magnesium alloy thin-wall parts |
| CN102806305A (en) * | 2012-08-24 | 2012-12-05 | 朱小英 | Preparation method of dope for metal type casting of magnesium alloy thin-walled component |
| CN102806305B (en) * | 2012-08-24 | 2015-02-25 | 戴初发 | Preparation method of dope for metal type casting of magnesium alloy thin-walled component |
| CN102806306B (en) * | 2012-08-24 | 2015-02-25 | 戴初发 | Coating for metal mold casting of magnesium alloy thin-wall parts |
| CN102921880A (en) * | 2012-11-07 | 2013-02-13 | 徐州鹏举金鱼草工艺品有限公司 | Water-based paint for iron casting through lost foam casting die |
| CN105127365A (en) * | 2015-08-31 | 2015-12-09 | 宁夏共享化工有限公司 | Color-changing casting coating capable of indicating moisture change during drying coating and preparation method thereof |
| CN105583356A (en) * | 2016-01-19 | 2016-05-18 | 中北大学 | Preparation method of coating for casting magnesium alloy lost foam |
| CN105772624A (en) * | 2016-04-27 | 2016-07-20 | 霍邱县鑫瑞金属制品有限责任公司 | Glass-powder-contained high-breathability water-base expendable pattern casting coating for magnesium alloy casting and preparing method for glass-powder-contained high-breathability water-base expendable pattern casting coating for magnesium alloy casting |
| CN106367173A (en) * | 2016-08-29 | 2017-02-01 | 遵义航天新力精密铸锻有限公司 | Preparation and usage method of protective lubricant for forging |
| CN107083083A (en) * | 2017-04-11 | 2017-08-22 | 石家庄钢铁有限责任公司 | A kind of coating for preventing that low Ni descaling of steel stock is not net and application method and application |
| CN107052230A (en) * | 2017-05-27 | 2017-08-18 | 大连理工大学 | A kind of alcohol radical anti-flaming dope for improving magnesium alloy mold-filling capacity and preparation method thereof |
| CN115055642A (en) * | 2022-05-26 | 2022-09-16 | 西北工业大学 | Method for combined flame retardance and oxidation resistance of 3DP sand magnesium alloy castings |
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| CN1164385C (en) | 2004-09-01 |
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| C06 | Publication | ||
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI HAOHUA MOLD CO., LTD. Free format text: FORMER OWNER: SHANGHAI JIAOTONG UNIV. Effective date: 20071116 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20071116 Address after: 200233 A408 room, No. 900, Shanghai, Yishan Road Patentee after: Shanghai Haohua Mould Co., Ltd. Address before: 200030 No. 1954, Huashan Road, Shanghai Patentee before: Shanghai Jiao Tong University |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040901 Termination date: 20140725 |
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| EXPY | Termination of patent right or utility model |