To determine temperature-hardness relationships for annealing copper and brass. Apparatus Laboratory furnaces and Rockwell Hardness Tester. Specimens Seven samples of copper and seven samples of brass Background One of the most valuable properties of metallic material is that it can be worked to the desired shape by rolling, forging, extrusion, stamping, and related processes. Not only is it possible to produce a desired shape from a sheet or bar, but also the mechanical properties of the component may be adjusted by combining the final working step and subsequent heat treatment.
Hardness testing is the simplest method of following the changes in structure.
The students in each laboratory section will be divided into two groups. The first group will receive seven samples of copper, and the second group will receive seven samples of brass. Each group conducts the appropriate tests and records the related data on their assigned sample. At the end of the laboratory period each group must neatly reproduce the results of their tests and give a copy to the other group. Cut a series of seven 0.25 inch thick samples of each.