论文部分内容阅读
采用ProCAST铸造仿真软件对镍基中空叶片定向凝固过程进行仿真模拟。结果表明:当界面换热系数恒定为1 500 W/m2·K时,随着抽拉速率逐渐降低,糊状区最小宽度从66.4 mm(v=8 mm/min)降低为39.1 mm(v=2mm/min);当抽拉速率恒定为2 mm/min时,随着界面换热系数降低,糊状区最小宽度从74.5 mm(H=1 500 W/m2·K)降低为39.1 mm(500 W/m2·K);抽拉速率和界面换热系数分别为2 mm/min和1 500 W/m2·K时,中空叶片最大位移量约为0.05 mm,可获得一定的尺寸精度。
ProCAST casting simulation software was used to simulate the directional solidification process of nickel-based hollow blades. The results show that the minimum width of the mushy zone decreases from 66.4 mm (v = 8 mm / min) to 39.1 mm (v = 8) when the heat transfer coefficient is constant at 1 500 W / 2mm / min). The minimum width of the mushy zone decreased from 74.5 mm (H = 1500 W / m 2 · K) to 39.1 mm (500 mm) as the drawing rate constant was 2 mm / W / m2 · K). The maximum displacement of the hollow blade is about 0.05 mm when the pull-out rate and the interface heat transfer coefficient are 2 mm / min and 1 500 W / m2 · K, respectively.