Method for modifying rare earth Y to AlSi7Mg alloy
An alloy and rare earth technology, applied in the field of metamorphic aluminum-silicon alloy, can solve problems such as AlSi7Mg alloy pore defects, and achieve the effect of improving mechanical properties, improving shape, and easy control of composition
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specific Embodiment approach 1
[0015] Specific embodiment 1: The method for modifying AlSi7Mg alloy by rare earth Y in this embodiment is realized through the following steps: 1. Weigh 34.05% to 45.05% of high-purity aluminum with a mass purity of 99.99%, 54.2% to 62.5% by weight percentage Al-12Si master alloy, 0.25%~0.45% mass purity of 99.99% high-purity magnesium and 0.5%~3% Al-10Y master alloy; 2. The high-purity aluminum and Al-12Si master alloy taken in step 1 After cleaning and drying, put it into a crucible resistance furnace with a power of 7.5kW, heat it until it is completely melted, and control the temperature of the melt at 720°C to 730°C; 3. Use a graphite bell jar with a temperature of 300°C to press the high-purity magnesium weighed in step 1 Put it into the melt obtained in step 2, keep it warm for 10-20min, and obtain the AlSi7Mg alloy melt, wherein the graphite bell jar is preheated at 300°C for 10-30min before use; 4. Rotate the AlSi7Mg alloy melt in step 3 After refining treatment by b...
specific Embodiment approach 2
[0019] Embodiment 2: This embodiment differs from Embodiment 1 in that the volume purity of the high-purity argon gas in Step 4 is not less than 99.999%. Other steps and parameters are the same as those in Embodiment 1.
specific Embodiment approach 3
[0020] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that in step one, 36.55% to 42% of high-purity aluminum with a mass purity of 99.99%, 56% to 60.6% of Al- 12Si master alloy, 0.35%~0.42% high-purity magnesium with a mass purity of 99.99%, and 1.5%~2.5% Al-10Y master alloy. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.
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