Experimental Study on Semi-solid Steels for Rheorolling

The experimental study on the familiar 6OSi2Mn and lCr18Ni9Ti materials for rheorolling in the semi-solid state using the directly rolling system designed by oneself has done. Experimental results show that the segregation of liquid occurs when the semi-solid slurry is rolled, which influence the microstructure and mechanical properties of workpiece under room temperature. The globular solid particles don't present plastic deformation unless high solid fraction. At the same time, the mechanical properties of workpiece is good while the semi-solid slurry is rolled a pass and no other treatment. Surface cracks found on the surface of workpiece are caused by temperature difference between the slurry and the roller or other factors. And it is necessary to restrict the flow of the slurry in the width direction during rolling for avoiding edge cracks.