from the conferences organized by TANGER Ltd. provisional website
The purpose of the paper was to analyse the effect of diverse heat treatment parameters (normalising and tempering) on mechanical characteristics of 508 x 20 x 90° tube bends made of the 10CrMo9-10 steel manufactured by bending with local induction heating. The research comprised tests of basic mechanical properties and creep at the temperature of 500 °C. With reference to the results thus obtained, it has been established that there is a relationship between mechanical properties of samples and individual features of their microstructure. Heat treatment parameters triggered changes to the microstructure of the bends, compared to an as-delivered tube. These effects included a change of strength characteristics (Rm, Rp0,2) and material creep lifetime, as compared with the tube. Heat treatment at a lower temperature and shorter tempering time assured the longest creep lifetime. It has also been found that the main structural factor determining creep lifetime of bends is grain size.Keywords: 10CrMo9-10 steel, heat treatment, tube bending, mechanical properties, creep
© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.