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Manufacturing process of aluminum alloy

  • Author:Zhangyuer
  • Source:www.xy-global.com
  • Release on:2021-10-22
Synthetic process aluminum and aluminum alloys can be melted in a variety of different ways. Coreless induction furnace and trough induction furnace, crucible furnace and reflective open hearth furnace (burning with natural gas or fuel oil), resistance furnace and electrothermal radiation furnace are often used. There are a wide range of charges, from high-quality pre alloyed ingots to charges composed of low-grade waste. However, even under the conditions suitable for melting and pouring, molten aluminum is vulnerable to three types of adverse effects: under high temperature conditions, the adsorption of hydrogen leads to the increase of hydrogen dissolved in the molten liquid over time. At high temperature, the molten liquid oxidizes with the passage of time. Loss of alloying elements. Hydrogen is easily adsorbed by molten aluminum. Unfortunately, in molten aluminum alloys, the solubility of hydrogen is basically greater than that in solid aluminum. When the aluminum alloy solidifies, the hydrogen is discharged from the melt, the shrinkage porosity is expanded and enlarged, and the mechanical properties are lost. Hydrogen generally comes from wet charge and wet melting tools, but the main hydrogen source is moisture in the environment. Because it is almost difficult to prevent the adsorption of hydrogen during smelting, hydrogen must be removed from the molten liquid before pouring. A more commonly used method is to blow dry nitrogen or argon bubbles into the molten liquid. The use of chlorine to remove hydrogen is particularly effective.