Increasing of Carbon Steel Durability by Surface Hardening
Keywords:carbon steel, fatigue, surface hardening, mechanical properties, durability.
Conditions of machine elements during exploitation, also durability and security of all construction depends a lot on the
state of metals surface layer. Hardening of metals surface allows to change expensive metals to cheap ones.
Improvement of surface quality allows to increase the durability of all construction. In this work the influence of various
kinds of surface treatments (hardening with high frequency electric current, rolling by rollers, tempering) on fatigue
strength of carbon steel specimens were investigated. Analysed technology of surface hardening greatly increases the
fatigue strength and durability of specimens. It was estimated that hardening effect depends on the residual stresses
introduced applying deformation and thermal treatment regimes. The optimal treatment of the analysed carbon steel is
deformation up to 1 mm depth, hardening with high-frequency electric current and tempering for 2 hours at 200 ºC.
The copyrights for articles in this journal are retained by the author(s), with first publication rights granted to the journal. By virtue of their appearance in this open-access journal, articles are free to use with proper attribution in educational and other non-commercial settings.