中文摘要：

作为最流行的使用的高速度的钢之一， M2 作为切工具拥有优秀坚硬和坚韧。在内部树枝状的区域散布的最容易溶解的碳化物的网络是考虑是 M2 的典型微观结构的学术上，它能被增加冷却的率精制。在这份报纸，一个新奇的扔方法说出溶性金属模子(FMM ) 被采用精制 M2 高速度的钢的微观结构。结果证明没有 melts 作文的任何污染，扔方法的 FMM 能由 100% 改进冷却的率。

英文摘要：

As one of the most popular used high-speed steels, M2 possesses excellent hardness and toughness as cutting tools. Networks of eutectic carbides distributing in the inter-dendritic region are academically considered to be the typical microstructure of M2, which can be refined by increasing cooling rate. In this paper, a novel casting method named fusible metal mold （FMM） is employed to refine the microstructure of M2 high-speed steel. Results show that FMM casting method can improve cooling rate by 100% without any contamination of the melts＇ composition.