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首页> 外文期刊>Materials Science and Technology: MST: A publication of the Institute of Metals >Effects of isothermal heating procedure and strontium addition on semisolid forming of AZ91 magnesium alloy
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Effects of isothermal heating procedure and strontium addition on semisolid forming of AZ91 magnesium alloy

机译：等温加热和锶添加对AZ91镁合金半固态成形的影响

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摘要

A two step isothermal heating process was developed to prepare a semisolid slurry of AZ91 alloy. In the process the alloy was heated isothermally at its liquidus temperature, cooled to a semisolid temperature, and then heated isothermally at the temperature before it was deformed. This relatively simple method was found to be a highly efficient way to generate a non-dendritic microstructure. The influence of strontium addition on the soundness of semisolid formed parts was also studied. AZ91 alloy is prone to shrinkage porosity because the freezing range of the alloy is wide. Porosity formation during the process was observed to be suppressed by the microaddition of strontium.
机译：开发了两步等温加热工艺以制备AZ91合金的半固态浆料。在此过程中，将合金在其液相线温度下等温加热，冷却至半固态温度，然后在变形之前在该温度下等温加热。发现这种相对简单的方法是产生非树突状微结构的高效方法。还研究了添加锶对半固态成形零件的完整性的影响。 AZ91合金的凝固范围广，因此容易产生收缩孔隙率。观察到在该过程中的孔隙形成被微量添加锶所抑制。

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