The paper provides an analysis of ultrasonic surface plastic deformation and subsequent laser thermal strengthening of gray cast iron parts in the regime of hardening from a solid state with the purpose to obtain strengthened surface layers of bigger depth and less roughness of the processed surface. Program complex ANSYS 11.0 has been used for calculation of temperature fields induced by laser exposure. The appropriate regime of laser processing without surface fusion has been selected on the basis of the applied complex. The possibility of displacement in the bottom boundary of α–γ-transformation temperature for СЧ20 with 900 °С up to 800 °С is confirmed due to preliminary ultrasonic surface plastic deformation of the surface that allows to expand technological opportunities of laser quenching of gray cast iron from a solid state.
Formation processes, tribotechnical and wear-resistant properties of composite gas thermal coatings being dispersively strengthened by synthetic diamonds and electro-corundum are investigated in the paper.
The paper contains research pertaining to laser thermohardening processes of high-strength ВЧ-50 cast iron and grey СЧ-20 cast iron with reference to a problem concerning an increase of wear resistance and operational properties of tractor «Belarus» brake mechanisms.
The paper considers pertaining to higher wear resistance of «Belarus» tractor brake mechanisms details are considered. Properties of ВЧ-50-cast iron are investigated due to laser hardening while using various technological methods.
