RESEACH ON LUBRICATION IN HOT EXTRUSION OF G3 CORROSION RESISTANT Ni-BASED ALLOY TUBE II. Calculation and Application of Glass Lubricant Viscosity-Composition

Based on the classical first-order mixture method which describes the relationship between the property value and component, a modified mixture method for predicting the viscosity property of borosilicate glass lubricant used in the hot extrusion of G3 alloy was established. Then, the viscosity properties of 10 different borosilicate glasses were predicted using this method. The viscosity data predicted by this calculation method coincided well with the experimental data, which showed that the calculation model was of strong reliability. Therefore, according to this model, the glass composition could be reversely designed, which will assure the viscosity of glass to meet the requirements of glass lubricated hot extrusion of G3 alloy which has been raised in the first article. It provides theoretical guidance for the design and preparation of glass lubricant in the glass lubricated hot extrusion of G3 alloy.