甩带法制备灰铸铁薄片的组织与性能  

Microstructure and Property of Gray Cast Iron Thin Slice Prepared Through Melt Spinning

作　　者：高培虎[1] 张延京[1] 杨忠[1] 郭永春[1] 李建平[1] 

机构地区：[1]西安工业大学材料与化工学院,陕西西安710021

出　　处：《热加工工艺》2016年第13期117-120,123,共5页Hot Working Technology

基　　金：国家重大基础科研项目(2012CB619602-3;2012CB619606-2);陕西省教育厅专项科研计划项目(2012JC13);陕西省光电材料与功能器件重点实验室基金项目(2015ZDJJ03)

摘　　要：采用真空甩带法在不同转速下制备灰铸铁薄片,通过扫描电镜,能谱分析和显微硬度测试研究了灰铸铁薄带的组织与性能。研究发现,采用20、30、40 m/s不同线速度制备的灰铸铁薄片组织是以Fe_2C为主要碳化物的枝晶状组织。随着甩带线速度的增加,枝晶尺寸明显增大且枝晶生长具有方向性。当甩带线速度为40 m/s时,试样的平均显微硬度达到1613.9 HV,甩带制备的薄片显微硬度值高出原始铸态灰铸铁4~6倍。Gray cast iron thin slices were prepared through melt spinning at different rotational velocities. Microstrucmre and properties of gray cast iron thin slices were investigated through SEM, EDS and microhardness test. Results show that Fe2C with dendritic shape was the main carbide in the gray cast iron thin slices prepared at the line velocities of 20 m/s, 30 m/s and 40m/s. With the increase of the melt spinning line velocity, the dendrite sizes increase and the dendrite grows directionally. The microhardness of the gray cast iron thin slice prepared at the line velocity of 40 m/s reaches to 1613.9 HV, which is four to six times higher than that of as-cast gray iron.

关 键 词：灰铸铁 薄片 甩带 组织 性能 

分 类 号：TG113.1[金属学及工艺—物理冶金] TG113.2[金属学及工艺—金属学]