摘要
运用材料性能模拟软件Jmatpro对一新型硼铸钢的合金相图和热物性参数进行计算,通过分析相图确定了铸造初始温度。根据板块的材质、结构及用途,确定了重力浇注＋加热冒口的工艺,建立了凝固过程的几何模型及有限元模型。运用有限元模拟软件Pro CAST对铸造过程的温度场、速度场进行了模拟仿真。通过分析z=0平面不同时刻温度云图发现,铸件整体由下向上逐层凝固,满足顺序凝固原则,消除了缩松、缩孔缺陷;通过比较6个关键点的温度曲线发现,铸件内部关键点也满足顺序凝固原则,冒口起到很好的保温及补缩作用。通过分析充型过程不同时刻速度云图发现,充型平缓,没有出现浇不足、冷隔现象。模拟结果表明铸造工艺设计合理,可以为实际生产提供指导。
The alloy phase diagram and theromophysical parameters of a new type of boron cast steel were calculated with Jmatpro software. The initial pouring temperature was determined by phase diagram analysis. According to the material, structure and application of the plate, a process of gravity casting with heated riser was determined. The geometry model and finite element model during solidification process were established. By finite element simulation software ProCAST, the temperature field and velocity field of the casting process were simulated. Through the analysis of the temperature at different time of z=0 plane, the casting is solidified from the lower layer to upper layer, which can satisfy the principle of the sequence solidification and eliminate the shrinkage porosity and shrinkage cavity defects. By comparing the temperature curve of six key points, the internal key point of the casting satisfies the principle of sequence solidification, then, the riser has good heat preservation and feeding effects. Through the analysis of the speed contour at different time of filling process, the filling is smooth and the misrun and cold shut. The simulation results show that the design of casting technology is reasonable. The simulation results could be used to guide the physical production.
出处
《热加工工艺》
CSCD
北大核心
2016年第7期92-97,共6页
Hot Working Technology
关键词
Jmatpro
新型硼铸钢
温度场
速度场
缩松
缩孔
Pro
CAST
Jmatpro
new type of boron cast steel
temperature field
velocity field
shrinkage porosity
shrinkage cavity
ProCAST
