The Effect of Process Annealing Temperature on The Evaluation of Anisotropy and Deep Drawability of Stainless Steel Sheet SUS304
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Abstract
This research aims to investigate the effect of process annealing temperature on the formability in different rolling directions, specifically focusing on the anisotropic behavior of stainless-steel sheet. The objective of the study is to design and conduct experiments to evaluate the deep drawing behavior and drawability of SUS304 stainless steel sheets, which are widely used in various industrial products. The goal is to develop a comparative predictive approach for analyzing the influence of annealing temperature based on mechanical properties, flange width, and wall thickness variation of drawn cups. The specimens were annealed at three temperature levels: 200 °C, 400 °C, and 600 °C in an electric furnace for 5 minutes, with 30 specimens per condition. Tensile tests and cylindrical cup drawing tests were then conducted using an Erichsen forming test machine, with the drawing ratio set at the standard value of 1.8. The experimental results showed that the difference in flange width and wall thickness of the cups varied inversely with the annealing temperature. Forming along the rolling direction resulted in the greatest reduction in wall thickness but the widest flange, whereas forming in the transverse direction led to the smallest reduction in wall thickness and the narrowest flange. These forming behaviors correspond well with the mechanical properties obtained from the tensile tests.
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