【摘要】 在16Mn、20MnVB、25MnTiB和09CuPTi钢中,RE/S比值分别达到2.2、2.0和1.2时,获得净化钢液的最佳效果。稀土变质氧化物取决于钢中~aCe/~aAl和~aCe·~aS/~aAl·~ao的比值,并对疲劳性能的改善起重要的作用;上述钢中RE/S比值分别达2.5、1.8和1.5时,将获得完全硫化物和氧化物的变质效果。因此为了得到高质量的稀土处理钢,必须控制钢中合适的RE/S比值的范围。更多还原

【Abstract】 When the ratio of RE/S in steel reachs to a certain value, for example RE/S =2.2 in 16Mn steel, RE/S = 2.0 in 20MnVB steel, RE/S = 1.5 in MnTiB steel, RE/S = 1.2 in 09CuPTi steel, the best effect purifying malden steel is obtained. The modification of oxides by RE addition is important to the improvement of fatigue resistance and it depends on the ratio of αco·αs/ αA1·α0 and aCe/αAI in steel. When RE/S ratio is 2.5, 1.8 or 1.5 in steel 16Mn or 20MnVB, 25MnTiB and 09CuPTi respectively, the all sulfide and oxide modification will be achieved. Therefore the optimal ratio range of RE/S in steel must be controlled.更多还原