【作者】 和优锋； 邢书明； 谢水生； 黄国杰； 程雷； 付垚；

【Author】 Youfeng HE~1,Shuming XING~2,Shuisheng XIE~1 Guojie HUANG~1,Lei CHENG~1,Yao Fu~1 1.State Key Laboratory for Fabrication and Process of Nonferrous Metals, General Research Institute for Nonferrous Metals,Beijing,100088,China; 2.School of Electromechanical Engineering,Beijing Jiaotong University,Beijing,100044,China

【机构】 北京有色金属研究总院有色金属材料制备加工国家重点实验室； 北京交通大学机械与电子控制工程学院；

【摘要】 采用斜坡预结晶法制备了M2高速钢半固态坯料,研究了斜坡长度对坯料显微组织的影响,采用imagetool软件进行定量分析,探讨了其非枝晶半固态组织的成形机理。结果表明:在浇注温度和斜坡角度一定时,斜坡长度对坯料显微组织有显著的影响。合金液在斜坡表面上流动将经过三个阶段:降温阶段、大量形核和球化阶段、形成凝固壳阶段。更多还原

【Abstract】 M2 high speed steel ingots were prepared by inclined slope pre-crystallization method.Effect of inclined slope length on the microstructure of M2 HSS ingots was investigated,and then the microstructure was quantitatively assessed by Image tool software.At last,the forming mechanism of non-dendritic semi-solid structure was discussed.It was found that the slope length has great influence on the microstructure of billets with the fixed casting temperature and slope angle.The molten alloy flows on the slope surface in 3 stages:cooling,largely nucleating and globurizing,and forming solidified shell.更多还原