Effect of electromagnetic stirring on solidification structure of austenitic stainless steel in horizontal continuous casting

摘要

An investigation on the influence of low frequency rotary electromagnetic stirring on solidification structureof austenitic stainless steel in horizontal continuous casting was experimentally conducted and carried out on anindustrial trial basis. The results show that application of appropriate electromagnetic stirring parameters can obviouslyimprove the macrostructure of austenitic stainless steel, in which both columnar and equiaxed grains can be greatlyrefined and shrinkage porosity or cavity zone along centerline can be remarkably decreased due to eliminatingintracrystalline and enlarging equiaxed grains zone. The industrial trials verify that the electromagnetic stirring intensityof austenitic stainless steel should be higher than that of plain carbon steel. Electromagnetic stirring has somewhataffected the macrostructure of austenitic stainless steel even if the magnetic flux density of the electromagneticstirring reaches 90 mT (amplitude reaches 141 mT ) in average at frequency f=3-4Hz, which provides a referencefor the optimization of design and process parameters when applying the rotary electromagnetic stirrer