The refined microstructure is insensitive to cooling rate, being independent of casting thickness.
这种合金的细小显微组织对冷却速度不敏感，不因铸件壁厚不同而变化。
The cast iron modified by re offers refined microstructure in which the carbides become blocky or granular, thus increasing the mechanical properties.
经稀土变质处理的铸铁组织细化，其碳化物呈团块状或颗粒状，从而提高了力学性能。
The experimental results show that super-refined microstructure is formed in the remelting layer. The bending strength and wear resistance are enhanced evidently.
结果表明，激光熔凝处理后获得超细化的枝品组织，其抗弯强度和耐磨性显著提高。
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