Fe-Cr-Ni-Al合金铸造过程的数值模拟及组织性能  

Numerical Simulation and Microstructure and Properties of Fe-Cr-Ni-Al Alloy Casting Process

作　　者：戴雷[1,2] 申烁 方东 DAI Lei;SHEN Shuo;FANG Dong(Hubei Engineering Research Center for Graphite Additive Manufacturing Technology and Equipment,China Three Gorges Univ.,Yichang 443002,China;College of Mechanical&Power Engineering,China Three Gorges Univ.,Yichang 443002,China)

机构地区：[1]三峡大学石墨增材制造技术与装备湖北省工程研究中心,湖北宜昌443002 [2]三峡大学机械与动力学院,湖北宜昌443002

出　　处：《三峡大学学报（自然科学版）》2023年第6期101-107,共7页Journal of China Three Gorges University：Natural Sciences

基　　金：国家自然科学基金项目(52171037)。

摘　　要：利用Procast软件模拟计算对Fe-Cr-Ni-Al合金的温度场和冷却速率进行分析,通过实验研究各冷却速率对铸态组织、枝晶间距以及显微硬度的影响.结果表明:采用阶梯状铸件能够较好地拟合Fe-Cr-Ni-Al合金铸件的温度场分布以及冷却速率的变化情况.随着冷却速率的增加,奥氏体相占比减小,铁素体相占比增大,过冷度增加使合金组织一次枝晶间距减小,组织中存在σ相,铁素体相区与奥氏体相区显微硬度值随冷却速率增大都呈增高趋势.The temperature field and cooling rate of Fe-Cr-Ni-Al alloy is analyzed by the simulation calculation of Procast softwar,and the effects of each cooling rate on the casting structure,the dendrite spacing and microhardness are studied experimentally.The results show that the distribution of temperature field and the change of cooling rate of Fe-Cr-Ni-Al alloy castings can be well fitted by using the stepped castings.With the increase of cooling rate,the proportion of austenite phase decreases and the proportion of ferrite phase increases.Meanwhile,the increase of super-cooling makes the primary dendrite spacing of alloy structure decrease.There are theσphases in the tissue,and the microhardness values of ferrite phase and austenite phase region increase with the increase of cooling rate.

关 键 词：Fe-Cr-Ni-Al合金 数值模拟 微观组织 显微硬度 枝晶间距 

分 类 号：TB331[一般工业技术—材料科学与工程]