Study of structure of dual phase steel after laser heat treatment using moving distributed surface heat sources

摘要

Dual phase steels are characterized by structurally sensitive properties and can be modified using various combinations of heating and cooling parameters. Using scanning electron microscopy, a structure of a dual phase steel in cross sections of heat-affected zones after a laser heat treatment using moving distributed surface heat sources were studied. As a result of the laser treatment, structures in the steel are formed whose properties are determined by the initial structure, a laser exposure time, a heating temperature, and also rates of heating and cooling of the metal material. The thermal effect can be controlled within wide limits by changing parameters of the laser beam and processing conditions. This provides the opportunity to obtain a given structure of the processed material and required properties.