The chemical composition of test materials selected for the study is given in Table 1.
Both a ferritic and bainitic matrix of ductile iron were produced, using different parameters of the heat treatment method. Microstructure bars, 20 mm in diameter and 100 mm in length, from a different casting, were cut as the specimens for friction welding.
The surface for friction welding was prepared on the abrasive cut-off machine. The geometry of specimens used for
friction welding and details of the experiment were presented in
Fig. 1.