Evaluation of the calorific value of exothermic sleeve material by the adiabatic calorimeter

Abstract

Recently, casting simulations have been used to improve the product quality and the yield during casting. However, there are cases in which the simulation results do not reproduce the defects in the product. Although accurate physical property values are necessary for highly accurate simulations, some physical property values are not dependable. Recently, the occurrence of defects, such as shrinkage porosity, has been compared between simulated results and actual products by varying the physical property values given in the simulation. It has been shown that the heat value of the exothermic sleeve in the catalog used to reduce defects may be approximately one-seventh of the actual heating value. In this study, we developed an adiabatic calorimeter with a simple configuration that can realize actual casting conditions. The heat generated by the three types of exothermic sleeves was measured. No difference in calorific value was observed between the three types of samples, and all were approximately 2 kJ·g−1. This value is less than the half of that provided in the catalog.

Keywords

• calorific value
• thermite reaction
• high temperature
• exothermic sleeve materials
• adiabatic calorimeter
• rapid heating condition