结果发现：稀土显著细化了半固态铝合金的球形晶粒组织，并提高了球形晶粒的圆整度和均匀性。
The experimental result shows that re can refine the globular grains of semisolid Al-alloy remarkably, improve the roundness and uniformity of globular grains.
结果表明，改变铜液流动方式能够细化晶粒，提高凝固组织的均匀性。
The results reveal that the change of flow ways of liquid copper can evidently refine the grain size and improve the distributed uniformity of solidified structure.
温变形后组织的力学性能高于退火变形组织的原因是晶粒的细化和纳米碳化物的均匀分布。
The mechanical property of m is higher than that of annealing structure after warm compression, probably because of the fine ferrite grain with uniformly distributed nano-sized carbide particles.
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