Investigation of Impact Toughness of Electromagnetic Centrifugal Cast High Speed Steel

摘要：

　　The effect of external magnetic field on the solidification structure and impact toughness of high-speed steel (HSS)produced by electromagnetic centrifugal casting(EMCC)have been investigated.It was found that the solidification structure could be improved effectively by electromagnetic stirring,which was characterized by elimination of the inclined columnar dendrites and refinement of the grain size.The results may be related to the changes of the fluid layers of liquid-solid phase interface.Moreover,the impact toughness of the test steel increased with the exciting current increasing from 12 to 18 A,but decreased when the current was above 18 A.SEM analysis showed that impact fracture surface was dimple fracture due to effect of the refined equiaxed grains when the current was 18 A,which was considered an important reason for the improvement of impact toughness.

关键词： electromagnetic centrifugal casting high speed steel Impact toughness grain refinement

作者: WANG Ming-jia GU Tao WANG Zi-xi

作者单位: State Key Laboratory of Metastable Materials Science and Technology,Yanshan University,Qinhuangdao 066004,Hebei,China

会议类型: 国际会议

会议名称: The 7th International Conference on Electromagnetic Processing of Materials(第七届冶金与材料电磁过程国际大会)

会议地点: 北京

会议语种:英文

页码: 1-6

在线出版日期: 2012-10-22（万方平台首次上网日期，不代表论文的发表时间）