TY - JOUR N2 - The paper attempts to analyze distortions of cast iron and cast steel rings, after heat treatment cycles. The factors influencing distortion are: chemical composition of material, sample geometry, manufacturing process, hardenability, temperature and heat treatment method. Standard distortion tests are performed on C-ring samples. We selected a ring-model, which approximate the actual part, so that findings apply to gear rings. Because distortion depends on so many variables, this study followed strictly defined procedures. The research was started by specifying the appropriate geometry of the samples. Then, the heat treatment was conducted and samples were measured again. The obtained results allow to determine the value of the resulting distortion and their admissibility. The research will be used to evaluate the possibility of using the material to produce parts of equipment operated under extreme load conditions. L1 - http://journals.pan.pl/Content/104608/PDF/afe-2017-0137.pdf L2 - http://journals.pan.pl/Content/104608 PY - 2017 IS - No 4 DO - 10.1515/afe-2017-0137 KW - Heat treatment KW - Ductile Iron KW - cast steel KW - Micrometric measurements KW - Distortion A1 - Nawrocki, P. A1 - Łukasik, K. A1 - Misiak, J. A1 - D. Myszka PB - The Katowice Branch of the Polish Academy of Sciences VL - vol. 17 DA - 2017 T1 - Study of Distortion on the Example of the Rings from Ductile Iron and Cast Steel UR - http://journals.pan.pl/dlibra/publication/edition/104608 T2 - Archives of Foundry Engineering ER -