Ifekt bilong elektromagnetik stirring long aloi element segregesen na ol samting bilong sentrifugal kasting silinda han
The casting of cylinder liner blank is mostly centrifugal casting, which is characterized by liquid metal solidification in rotating motion. The acceleration of centrifugal force field is generally tens to a hundred times of the acceleration of gravity. The characteristics of centrifugal casting determine its own shortcomings, that is, due to one-way heat dissipation, some alloys often get thick penetrating cylindrical crystal tissue, which affects the mechanical properties of the casting. In addition, the shrinkage hole and other defects are prone to occur in the process of centrifugal casting, and the greater the difference between the outer diameter of the support shoulder and the outer circle diameter of the cylinder liner, the more the defects of the shrinkage hole. Secondly, the solidification of liquid metal under a strong sentrifugal fos fil bai kamapim moa bikpela spesifik graviti segregesen bilong ol aloi tisu bilong ol aloi tisu i save kisim spesifik graviti segregesen long statik kasting. Elektromagnetik stirring em i wanpela bikpela rot bilong kamapim gut pes kwaliti na intanel oganaisesen bilong billet{{6} Magnetik fil i gat strongpela tisyu i go insait consolidation, such as the refinement of grain grains, the decrease of axial segregation in continuous casting, and the deflection of the dendrite tissue after directional solidification. In view of the influence of electromagnetic field on the solidification process, organization and performance of cast iron, this paper proposes to apply electromagnetic field in the process of centrifugal casting cylinder sleeve, and study the change of organization and performance under the condition of electromagnetic centrifugal casting. In the process of cylinder liner iron solidification, the primary phase is the first precipitate. Since the partition coefficient of Cr, Mn and C elements in the phase is less than 1, Cr, Mn and C elements continue to row in the liquid phase in the solidification front, and are enriched in the interdendrite and solid-liquid interface melt. After applying electromagnetic field, due to the action of centrifugal force and electromagnetic tangential force, in the front of the strong tangential flow, electromagnetic stirring flow not only makes the primary phase and secondary dendrite wall refinement, more conducive to Cr, Mn, and C alloy elements in liquid phase homogenization, so this is conducive to the macro segregation of alloy elements, moa yet long kondisen bilong sentrifugal fos.elemen B i save kamapim ol bikpela bea long kast ain na em i kamap leit long solidifikesen. Olsem na, wok bilong skruim strong bilong magnetik fil i go antap oltaim i no gat bikpela wok long element B, bikos long ol senis long ol kondisen bilong koagulesen bilong ol kondisen bilong koagulesen.
