论文部分内容阅读
快速凝固使Ａｌ－Ｓｒ合金产生了微观组织细化、缺陷密度增加、成分均匀化以及固溶体过饱和化等变化。在Ａｌ－Ｓｒ合金快速凝固条带（以下称激冷带）横截面上出现“双区”组织。冷却速度达到１０６Ｋ／ｓ激冷带的激冷侧晶粒达到纳米级。变质实验结果表明：不同冷却速度下形成的Ａｌ－Ｓｒ中间合金具有不同的变质效果，快速凝固的Ａｌ－Ｓｒ中间合金达到与常规Ａｌ－Ｓｒ中间合金相同的变质度，其用量减少５０％～６０％，潜伏期缩短５０％左右。
The rapid solidification causes the Al-Sr alloy to have the microstructure refinement, the defect density increase, the component homogenization and the supersaturation of the solid solution. In the Al-Sr alloy rapid solidification strip (hereinafter referred to as the cooling zone) cross-section “double zone” organization. Cooling rate of 106K / s chilling side of the chilled side of the grain to nano-scale. The results of the metamorphic experiment show that the Al-Sr master alloy formed at different cooling rates has different metamorphic effects. The rapidly solidified Al-Sr master alloy reaches the same degeneracy as the conventional Al-Sr master alloy, and its dosage is reduced by 50% -60 %, Shorten the incubation period by about 50%.