Abstract
The crack morphologies of 304 stainless steel strip after twin roll casting were observed by scanning electron microscope (SEM). Its phase transformation was calculated by Jmatpro software. Then a 3D stress model of twin roll cast stainless steel strip was developed by ANSYS software. The simulation results show good accordance with the crack observation. Then the stress fields with different casting speeds were simulated, and the cracking possibilities were evaluated. The results show that the stress mainly distributes on the contact surface between molten pool and roll. The risky points are located at the outlet, specifically, close to the side dams and the center of molten pool. With the increase of casting speed, the stress decreases and the stress peak caused by phase transformation disappears gradually. When the optimized casting speed is 0.2-0.4 m/s, no crack initiates on the stainless steel strip during twin roll casting process.
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