快凝加硼M2高速钢的制备工艺、组织和硬度  

Preparation,Microstructure and Hardness of Rapidly Solidified M2 High Speed Steel Added Boron

作　　者：李谦[1] 曹兴国[1] 栗振思[1] 倪瑞澄[1] 

机构地区：[1]洛阳工学院,上海材料研究所

出　　处：《机械工程材料》1995年第1期28-31,共4页Materials For Mechanical Engineering

摘　　要：采用单辊平面流铸工艺成功地制取了加硼高速钢Ｍ２＋１．１Ｂ、Ｍ２＋１．５Ｂ、Ｍ２＋２．０Ｂ的急冷条带。条带具有极高的硬度，其组织由微晶和非晶混合组成。Ｍ２＋１．１Ｂ急冷态主要由细小均匀的亚稳过饱和δ－Ｆｅ胞状微晶组成，硼含量愈高，非晶度增大，Ｍ２＋２．０Ｂ急冷态主要由非晶组成。The melt spinning process of the boron modified M2 high-speed steel-M2+1.1B,M2+ 1.5B and M2+2.0B,is discussed in this paper. The planar flow casting method is used to obtain a rapidly solidified ribbon. The ribbon has high hardness.The rapidly solidified ribbon of M2+ 1.1B consist almost entirely of a single homogeneous,metastable and highly super-saturated δ-Fe,which has ultrafine solidified cells.With the increase of boron content,the amount of amorphous phase increases gradually.The as-quenched M2+2.0 B alloy is amorphous almost.

关 键 词：快速凝固 高速钢 硼合金化 非晶态 制备工艺 

分 类 号：TG244[金属学及工艺—铸造]