论文部分内容阅读
以水雾化法制备的Inconel713C合金粉末为原料,利用ZRZ1452型熔体流动速率仪,研究了三种塑基粘结剂体系和Inconel713C合金粉末混合制备的喂料的流变性能。通过线性回归分析,计算出非牛顿指数n和τ_w-γ_w近似关系式。结果表明:在52%装载量下,三种组分喂料的粘度均随温度的升高以及剪切速率的增大而减小。粘结剂组成为85%POM+5%HDPE+10%其他助剂的喂料(D1)具有最好的充模性,呈假塑性流体。喂料D1的粘度与温度关系更好地符合Arrhenius定律,随剪切速率的增加,粘流活化能降低,而指前因子增大。
Using Inconel713C alloy powder prepared by water atomization as raw material, the rheological properties of three kinds of plastic-based binder systems and Inconel713C alloy powders were studied by using ZRZ1452 melt flow rate meter. By linear regression analysis, the approximate relationship between non-Newtonian index n and τ_w-γ_w is calculated. The results show that at 52% loading, the viscosity of the three components decreases with the increase of temperature and the increase of the shear rate. The binder (Dl), which has a composition of 85% POM + 5% HDPE + 10% other auxiliaries, has the best moldability and is a pseudoplastic fluid. The relationship between viscosity and temperature of feeding D1 accords with Arrhenius law better. With the increase of shear rate, the activation energy of viscous flow decreases while the pre-exponential factor increases.