Answer Happy

Lab 4: Heat Treatment of Steels Procedure: 1. Four small cylindrical work pieces of the given steel specimen are heated in the muffle furnace to its austenitising temperature of 8400C and maintained for 30 minutes. 2. The hot pieces are taken out, and one of them is quenched in water and one in oil. One of the remaining two pieces is allowed to cool to room temperature in the air, and the other is buried in the sand. 3. After the pieces are cooled to room temperature in different cooling media, they are taken out and cleaned. 4. The hardness of each specimen is determined on the case at different points of the specimen using the Rockwell hardness testing machine. Results: > Write a theory of heat treatment processes ➤ Tabulate the hardness results obtained with the different cooling media for the given specimens ➤ Draw the bar chart for the same aforementioned and comment on what you understand from this experiment. ➤ Safety precautions to be taken during this exercise