A novel method of increasing ceramic shell permeability and optimizing casting shrinkage and tensile strength of the investment cast parts

Abstract

This study explores about enhancing the permeability of the ceramic shells used in the investment casting process using cheaply available sawdust particles. An increase in shell's permeability augments the cooling rate of the casting which enhances its mechanical properties. It was found that the inclusion of sawdust particles into the ceramic slurries exhibited positive impact on the shell's permeability. It is a well-known fact that electromagnetic stirring process increases the mechanical properties of the castings, but its effect on casting shrinkage has never been realized. Thus, this study further throws light on the impact of electromagnetic stirring in reducing the shrinkage and improving the tensile strength of the casting. In a nutshell, it was found that the final product quality of the investment cast part improved by the combinational treatments adopted in this research work.

Investigate the Process Parameter on the Friction Stir Welding of Dissimilar Aluminium Alloys

“…e plates were sheared to nominal dimensions of 50 mm × 180 mm so that the grains aligned in the direction of the joint line. e experiments were performed on the plates in the rolling direction [11][12][13]. Figure 3 shows the geometric layout representation of HC steel for FSW.…”

Comparison of various gating systems for investment casting of hydraulic retarder impeller with complex geometry

“…Investment casting is an important industry expertise and has been widely used in various manufacturing fields due to its advantages of high precision, high shape complexity, and good adaptability to various alloys. [1][2][3] Singh and Singh 4 reviewed the development of this technique and demonstrated that the main steps of investment casting include wax mold pressing and assembly, mold preparation, dewaxing and mold baking, liquid metal pouring, mold cleaning and posttreatment of castings.…”