Effect of Different Hardening Processes on Brass, Aluminium and Mild Steel on Impact Number

Abstract

In this paper, we are going to study the effect of the heat treatment process on brass, aluminium, and mild steel to find out the change in the impact number of that material. Here we heated the metals above the critical (normalizing) temperature, holding them at this temperature for one hour per inch of thickness and cooling at a rate fast enough to allow the material to transform into a much harder, stronger structure. Many researchers have studied the effects of heat-treating processes on mechanical properties, corrosion and wear resistance of various martensitic stainless steels. It is crucial to comprehensively understand the role of heat-treating processes on the mechanical properties of the steels with a systematic approach. In this work, the specimens were heat treated in a muffle furnace and cooled in air, water and oil, and checked the change in impact numbers. The effects of different hardening processes are hardening, softening, and property modification. Heat treatment is a process that uses controlled heating and cooling to modify the crystalline structure of metals and metal alloys. Depending on the material and treatment process, heat treatment can provide numerous benefits, including enhanced hardness, increased temperature resistance, greater ductility, and improved material strength. Heat treatments are a critical aspect of metal fabrication processes, as they allow the materials to gain desirable physical and mechanical properties without altering the shape of the product.