A kind of processing method of alkaline earth magnesium alloy plate
A processing method and technology for magnesium alloys, which are applied in the field of alloy material production, can solve the problems of difficult processing and poor plasticity of magnesium alloys, and achieve the effect of improving mechanical properties.
Inactive Publication Date: 2015-11-25
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology
Although magnesium alloys have the potential to be widely used, the poor shape of magnesium alloys and the difficulty of processing have always been the technical bottleneck for their large-scale production and application. Therefore, improving the shape of deformed magnesium alloys is an urgent need for the development of its processing technology and the improvement of product quality.
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[0014] Embodiment: Material selection by weight percentage Raw materials for future use: Al: 7.5%-8.3%, Ca: 1.0%-1.3%, Sr: 0.2%-0.4%, Mn: 0.2%-0.4%, and the balance is Mg. Preheat the crucible to dark red, add pure magnesium ingots and pure aluminum ingots at about 550°C, protect with a mixed gas of SF6 and CO2; use a heating rate of 10°C / min to rapidly heat up, wait until the added alloy is melted before use Stir the solution evenly with a molybdenum rod; raise the temperature to 720-750°C, add Mg-Ca intermediate alloy, Al-Sr intermediate alloy, melt while stirring, stand still for about 15 minutes after complete melting, and keep the temperature unchanged; stand still for about 20 minutes , Casting between 690°C and 750°C, the casting mold is preheated to 200°C. The obtained alloy is firstly subjected to solution treatment process: 400°C for 10h; extrusion process: extrusion temperature is 200°C, extrusion ratio is 14:1, and extrusion rate is 2mm / min; then aging treatment pr...
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Abstract
The present invention discloses an alkaline earth magnesium alloy and a plate melting-casting treatment method thereof. The alkaline earth magnesium alloy comprises, by weight, 7.5-8.3% of Al, 1.0-1.3% of Ca, 0.2-0.4% of Sr, 0.2-0.4% of Mn, and the balance of Mg. The method comprises: adding pure magnesium ingots and pure aluminum ingots at a temperature of about 550 DEG C under protection of SF6 and CO2 mixed gas; rapidly heating at a 10 DEG C / min heating rate, melting, and uniformly stirring the solution by using a molybdenum rod; heating to a temperature of 720-750 DEG C, adding a Mg-Ca interalloy, an Al-Sr interalloy, melting while stirring, standing for about 15 min after completely melting, and maintaining a constant temperature; and standing again for about 20 min, casting at a temperature of 690-750 DEG C, and preheating a casting mold to a temperature of 200 DEG C. With the invention, the form of the second phase of the alkaline earth base heat resistance magnesium alloy is improved, and comprehensive mechanical performances of the prepared alkaline earth magnesium alloy plate are excellent.
Description
technical field [0001] The invention belongs to the field of alloy material production, and in particular relates to an alkaline earth magnesium alloy and a plate melting and casting treatment method thereof. Background technique [0002] Magnesium alloy has low density, high specific strength and specific stiffness, high electrical and thermal conductivity, excellent damping and shock absorption performance and electromagnetic shielding performance, good casting forming performance and cutting performance, and is easy to recycle, so it is used in aerospace, automobile It has broad application prospects in manufacturing, home appliances, electronic communications and other fields, and has become a very important modern industrial material. Mg-Al based alloy is currently the most widely used magnesium alloy system due to its good die casting, processing and mechanical properties, and the alloy has the advantages of low density, high specific strength and specific stiffness. ...
Claims
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IPC IPC(8): C22C23/02C22C1/03C22F1/06
Inventor 张代东房大庆张晓茹葛秀琴郝晓伟柴跃生
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY