Application of Physical Refinement Methods in Metal Solidification Process
Physical refining method has become an important way to improve the solidification structure of metal and the performance of metallurgical products due to the advantages of non-pollution of melt and keeping the matrix compo-sition of materials.With the demanding requirements for the cleanliness,chemical refining methods such as adding nucleation agents will be limited in various fields,and physical refining methods are widely used.Physical refinement methods can be divided into two categories:Contact and non-contact.The contact type mainly includes mechanical stir-ring,ultrasonic wave,pulse current and so on,while non-contact type mainly includes electromagnetic stirring,mechanical vibration,pulsed magnetic field and pulsed magnetic oscillation.The typical physical refining methods of metal solidification structure were reviewed in aspect of refining mechanism,development process and industrial appli-cation,and future development trend of physical refining methods was prospected.