Ultrahigh-strength multi-purpose lightweight alloy, smelting technology and application
A lightweight alloy and multi-purpose technology, applied in the field of alloys, can solve the problems of low high-temperature mechanical properties of magnesium alloys, and achieve the effects of outstanding high-temperature mechanical properties, simple preparation process, and excellent high-temperature mechanical properties
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Embodiment 1
[0026] Now place the Mg-Y master alloy preheated to 200°C in the crucible, SF 6 / CO 2 The temperature was raised under the protection of mixed gas. When the furnace temperature rises to the temperature range of 780°C, the intermediate alloy melts, and after holding the heat for 10-20 minutes, stir and remove the scale and other slag on the surface of the alloy liquid; then, lower the melting temperature to 740°C, add magnesium ingots, and hold for 10-20 minutes. After 20 minutes, stir and remove slag; continue to lower the temperature to 720°C, add Zn, stir and remove slag. Increase the current, raise the temperature to 800°C, stir the alloy liquid, and remove the slag. Finally, keep the alloy liquid at this temperature and keep it still for more than half an hour. After the alloy liquid is cooled to 780°C, it is poured into the mold. A Mg-Zn-Y alloy with a volume fraction of about 70% of the elongated phase is prepared. The Zn content in the alloy is 24wt.%, the Y content...
Embodiment 2
[0031] Now place the Mg-Y master alloy preheated to 200°C in the crucible, SF 6 / CO 2 The temperature was raised under the protection of mixed gas. When the furnace temperature rises to the temperature range of 780°C, the intermediate alloy melts, and after holding the heat for 10-20 minutes, stir and remove the scale and other slag on the surface of the alloy liquid; then, lower the melting temperature to 740°C, add magnesium ingots, and hold for 10-20 minutes. After 20 minutes, stir and remove slag; continue to lower the temperature to 720°C, add Zn, stir and remove slag. Increase the current, raise the temperature to 800°C, stir the alloy liquid, and remove the slag. Finally, keep the alloy liquid at this temperature and keep it still for more than half an hour. After the alloy liquid is cooled to 780°C, it is poured into the mold. A Mg-Zn-Y alloy with a volume fraction of about 85% of the elongated phase is obtained. The Zn content in the alloy is 30wt.%, the Y content...
Embodiment 3
[0037] Now place the Mg-Y master alloy preheated to 200°C in the crucible, SF 6 / CO 2 The temperature was raised under the protection of mixed gas. When the furnace temperature rises to the temperature range of 780°C, the intermediate alloy melts, and after holding the heat for 10-20 minutes, stir and remove the scale and other slag on the surface of the alloy liquid; then, lower the melting temperature to 740°C, add magnesium ingots, and hold for 10-20 minutes. After 20 minutes, stir and remove slag; continue to lower the temperature to 720°C, add Zn, stir and remove slag. Increase the current, raise the temperature to 800°C, stir the alloy liquid, and remove the slag. Finally, keep the alloy liquid at this temperature and keep it still for more than half an hour. After the alloy liquid is cooled to 780°C, it is poured into the mold. A Mg-Zn-Y alloy with a volume fraction of about 89% of the elongated phase is obtained. The content of Zn in the alloy is 33.3wt.%, the cont...
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Abstract
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