物理场细化镁合金凝固组织研究新进展

New Research Progress on Refinement of Magnesium Alloy Solidification Microstructure by Physical Fields

常规铸造条件下,镁合金凝固组织为发达、粗大的枝晶,铸件的强度和塑性均较低,影响其使用性能。组织细化对于提高镁合金铸件的力学性能极为重要。本文着重综述了外场孕育法细化晶粒方法,如机械振动、机械搅拌、电流、超声波和磁场等方法对镁合金微观组织的影响。

Under the common casting conditions, the solidification microstructure of magnesium alloy is developed and massive, the strength and plasticity of casting are very lower, and these influence its performance. So, the microstructure refinement is very important to improve the mechanical properties of magnesium alloy castings. It mainly described how to use the field inoculation to refine grains in this page, for example the influences of mechanical shock, mechanical stir, current, ultrasonic and magnetic on the microstructure of magnesium alloy.