Investigation of the contact fatigue strength of high quality carburised steel

Abstract

The parameters of contact fatigue strength during vacuum carburization and ion nitriding of high quality steel (HQS) HQS-7 and HQS-10 are considered. Information about the modes of chemical and heat treatment is given and the technological process of hardening for HQS-7 and HQS-10 steels is considered. The characteristics of the contact fatigue strength of steels in the statistical aspect at different levels of contact stresses are obtained. A graphical analysis of the obtained values after testing was carried out, the optimal stresses for research were determined and the optimal version of chemical heat treatment was selected, which determines the best indicators for mechanical characteristics and operational requirements.

Optimization of laser surfacing technological parameters to composite coatings WC/INC625

“…Diode laser sources are the most suitable for surfacing, since the energy distribution density is the most uniform [15,16]. The used technologies for applying functional composite coatings based on the Inconel 625 (INC625) nickel alloy are not sufficiently perfect, as they are accompanied by possible disadvantages, such as cracks and porosity [17][18][19][20].…”