【摘要】 本文研究了稀土对半钢热加工性能的影响。在900～1100℃的温度范围及2×10^-3～1×10^-2s^-1的变形速度范围内,研究稀土加入后热拉伸试样断面收缩率及断口形貌变化情况。由此得出,改善半钢热加工性能的合适的稀土加入量应为0.02～0.05％。更多还原

【Abstract】 The effect of RE （Rare Earth Element） addition on the hot workability of cast semi-steelhas been studied. The reduction of area and change in fracture morphology because of RE ad-dition after hot tensile fracture at temperature 900～1100℃ and strain rate 2×10^-3～1×10^-2s^-1were examined, thereby leading to the conclusion that the optimum amount of RE addition isabout 0.02～0.05% for improving the hot workability of cast semi-steel.更多还原