CN101024239A - Technology for making magnesium-alloy fired mold casting type sheel - Google Patents
Technology for making magnesium-alloy fired mold casting type sheel Download PDFInfo
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- CN101024239A CN101024239A CN 200610017461 CN200610017461A CN101024239A CN 101024239 A CN101024239 A CN 101024239A CN 200610017461 CN200610017461 CN 200610017461 CN 200610017461 A CN200610017461 A CN 200610017461A CN 101024239 A CN101024239 A CN 101024239A
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Abstract
The invention discloses a magnesium alloy investing molding shell manufacturing technique. It includes the following steps: molding, model set tree, painting, spraying sand, de-waxing, roasting, controlling the tapping temperature at 100-300 degree centigrade; adding fire retardant to soak for 3-5min; air drying; drying in the furnace at 200-400 degree centigrade; using in casting after draw a charge. The invention has the advantages of simple operation, low cost, stable product quality etc.
Description
Technical field:
The invention belongs to the magnesium alloy investment casting technical field.
Background technology:
Because the magnesium alloy investment casting technology is cast the casting dimension accuracy height, surface quality is good, complex-shaped degree is restricted hardly, combines with rapid shaping technique, both be fit to the single and mini-batch production castings production, also be fit to castings production in enormous quantities, thereby have the flexibility height, widely applicable.It mainly through molding, model group tree, coat stucco, dewaxing, roasting technique and make shell, cast magnesium alloy liquation in shell through technical process such as cooling, cleanings, is made Mg alloy castings at last then.The key of magnesium alloy investment casting technology is in casting process; stop the reaction and the high temperature magnesium alloy liquation of high temperature magnesium alloy liquation and type shell material anti-flaming anti-oxidation; this considers to add protectant problem with regard to needs in shell; what adopt at present is to make the operation stage that sands of coating at shell initial stage; in coating and sand, add protective agent; coating and sand all need formulated like this; complicated operation, cost rise; and the shell that makes protective agent loss in the roasting technique process is serious, poor effect.
Summary of the invention:
The purpose of this invention is to provide a kind of simple to operate, cost is lower, the effective technology for making magnesium-alloy fired mold casting type sheel of protection.
To achieve these goals, the present invention includes: molding, model group tree, coat stucco, dewaxing, roasting technique process, shell tapping temperature after the control roasting is 100-300 ℃, adding fire retardant in shell soaks, infiltrating time is 3-5 minute, after drying shell is encased in temperature and is in 200-400 ℃ the stove and dry, can be used for cast after coming out of the stove.
Because the present invention adds protective agent again after making shell; and the protective agent homogeneous immersion is to the interior surface of shell; when pouring into a mould; it is not oxidized to protect the magnesium alloy liquation effectively; thereby improve the Mg alloy castings quality, have simple to operate, characteristics such as cost is lower, constant product quality.
The specific embodiment:
Prepare shell and make various raw materials, after stucco, dewaxing, roasting technique process are set, coated to process molding, model group, make shell, the kind of this shell comprises sodium silicate shell, silicasol case and composite shell.Shell tapping temperature after the control roasting is 100-300 ℃, adding fire retardant in shell soaks, fire retardant is that concentration is the BAS of 5-25%, the BAS temperature is 20-80 ℃, infiltrating time is 3-5 minute, then unnecessary fire retardant poured out and carry out shell and dry, after drying shell is encased in temperature and is in 200-400 ℃ the drying oven and dry, can be used for cast after coming out of the stove.Before cast, in shell, feed carbon dioxide, pour into a mould the magnesium alloy liquation then immediately, behind the casting complete, blow carbon dioxide a moment at the magnesium alloy molten surface again, make magnesium alloy liquation and air isolated and make magnesium alloy molten surface rapid solidification, with the further oxidation of prevention magnesium alloy.After treating that the magnesium alloy cooled and solidified is finished, can shell and clear up makes Mg alloy castings.
Claims (2)
1, a kind of technology for making magnesium-alloy fired mold casting type sheel, comprise: molding, model group tree, coat stucco, dewaxing, roasting technique process, the shell tapping temperature that it is characterized in that controlling after the roasting is 100-300 ℃, adding fire retardant in shell soaks, infiltrating time is 3-5 minute, after drying shell is encased in temperature and is in 200-400 ℃ the stove and dry, can be used for cast after coming out of the stove.
2, a kind of technology for making magnesium-alloy fired mold casting type sheel according to claim 1 is characterized in that described fire retardant is that concentration is the BAS of 5-25%, and the BAS temperature is 20-80 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610017461 CN101024239A (en) | 2006-02-24 | 2006-02-24 | Technology for making magnesium-alloy fired mold casting type sheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610017461 CN101024239A (en) | 2006-02-24 | 2006-02-24 | Technology for making magnesium-alloy fired mold casting type sheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101024239A true CN101024239A (en) | 2007-08-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610017461 Pending CN101024239A (en) | 2006-02-24 | 2006-02-24 | Technology for making magnesium-alloy fired mold casting type sheel |
Country Status (1)
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| CN (1) | CN101024239A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102380578A (en) * | 2011-11-10 | 2012-03-21 | 华中科技大学 | Vacuum pouring method for gypsum mold high-precision casting of aluminum and magnesium alloy |
| CN102836963A (en) * | 2012-09-09 | 2012-12-26 | 安徽厚林精密金属科技有限公司 | Support casting process |
| CN103231016A (en) * | 2012-12-31 | 2013-08-07 | 湖北汽车工业学院 | Casting method of magnesium alloy casting |
| CN105014011A (en) * | 2015-07-12 | 2015-11-04 | 河北钢研德凯科技有限公司 | Precision casting magnesium alloy mould housing preparation process |
| CN106363131A (en) * | 2016-09-21 | 2017-02-01 | 上海万泽精密铸造有限公司 | Modification method for ceramic shell surface layer for titanium alloy casting |
| CN107486543A (en) * | 2017-08-10 | 2017-12-19 | 合肥市田源精铸有限公司 | A kind of full form casting process of case of transmission |
| CN114273638A (en) * | 2020-09-28 | 2022-04-05 | 中国科学院金属研究所 | Low-pressure precision casting method of magnesium alloy thin-wall shell part |
-
2006
- 2006-02-24 CN CN 200610017461 patent/CN101024239A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102380578A (en) * | 2011-11-10 | 2012-03-21 | 华中科技大学 | Vacuum pouring method for gypsum mold high-precision casting of aluminum and magnesium alloy |
| CN102380578B (en) * | 2011-11-10 | 2013-09-04 | 华中科技大学 | Vacuum pouring method for gypsum mold high-precision casting of aluminum and magnesium alloy |
| CN102836963A (en) * | 2012-09-09 | 2012-12-26 | 安徽厚林精密金属科技有限公司 | Support casting process |
| CN102836963B (en) * | 2012-09-09 | 2015-02-25 | 安徽厚林精密金属科技有限公司 | Support casting process |
| CN103231016A (en) * | 2012-12-31 | 2013-08-07 | 湖北汽车工业学院 | Casting method of magnesium alloy casting |
| CN105014011A (en) * | 2015-07-12 | 2015-11-04 | 河北钢研德凯科技有限公司 | Precision casting magnesium alloy mould housing preparation process |
| CN106363131A (en) * | 2016-09-21 | 2017-02-01 | 上海万泽精密铸造有限公司 | Modification method for ceramic shell surface layer for titanium alloy casting |
| CN107486543A (en) * | 2017-08-10 | 2017-12-19 | 合肥市田源精铸有限公司 | A kind of full form casting process of case of transmission |
| CN114273638A (en) * | 2020-09-28 | 2022-04-05 | 中国科学院金属研究所 | Low-pressure precision casting method of magnesium alloy thin-wall shell part |
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