FeCoNiCrC共晶高熵合金铸造过程的数值模拟

Numerical Simulation of Casting Process for FeCoNiCrC Eutectic High-entropy Alloy

设计了螺旋流动性模型、薄壁充型模型和凝固应力框模型3种模型,基于ProCAST软件分析比较了FeCoNiCrC_(0.45)和Fe_(1.2)CoNiCr_(0.8)C_(0.45)高熵合金材料的热物性能、流动性、金属液充型过程、凝固过程以及铸造工艺参数,研究了近共晶高熵合金材料的铸造性能。结果表明,Fe_(1.2)CoNiCr_(0.8)C_(0.45)高熵合金具有更加优越的铸造性能。合适的浇注速度和浇注温度可有效提升浇注速率;结构复杂铸件在交界处的应力最大,易产生缩松、缩孔缺陷。

Models of spiral fluidity,thin-walled filling and solidification stress frame were designed,and thermophysical properties,fluidity performance,filling process,and solidification process as well as casting process parameters of both FeCoNiCrC_(0.45) and Fe_(1.2)CoNiCr_(0.8)C_(0.45) high entropy cast iron were mainly analyzed comparatively based on the ProCAST software.The casting properties of near-eutectic high entropy cast iron were determined.The results indicate that the properties of Fe_(1.2)CoNiCr_(0.8)C_(0.45) high entropy cast iron is superior to the others.Moreover,the pouring rate can be improved effectively by taking desirable pouring speed and pouring temperature.The greatest stress occurs at the junction of the complex casting,where the defects of shrinkage and porosity are easilygenerated.