冷却速度对铸件二次枝晶臂间距影响的模拟研究  

Simulation Research on the Effect of Cooling Rate on Secondary Dendrite Arm Spacing in Casting

作　　者：孙德润[1] 张宏 门正兴 李其 房鑫 

机构地区：[1]中国第二重型机械集团公司,四川618013 [2]二重大型铸锻件数值模拟国家工程实验室,四川610052

出　　处：《大型铸锻件》2014年第4期1-3,10,共4页Heavy Casting and Forging

摘　　要：设计了45#钢阶梯凝固试验并进行了有限元分析,研究了不同冷却速度对二次枝晶臂间距尺寸的影响。根据模拟结果拟合了冷却速度与二次枝晶臂间距经验公式,为判断铸件冷却温度、建立高温扩散退火预判机制、降低铸件偏析和避免裂纹的产生提供理论依据。The solidification experiment for 45 steel is designed and finite element analysis is carried out .The effect of different cooling rates on the secondary dendrite arm spacing （SDAS） is researched.The empirical formula for cooling rate and SDAS is fitted .It will provide the theory evidence for judging the cooling temperature of casting and establishing the high temperature diffusion annealing anticipation mechanism and decreasing the segregation and crack in casting.

关 键 词：45#钢 冷却速度 二次枝晶臂间距 有限元分析 

分 类 号：O242.21[理学—计算数学]