Effect of Process Parameters and Heat Treatment on the Microstructure and Mechanical Properties of SLM-built HY100 Steel

HY100 is a high strength low alloy steel used for naval and pressure vessel applications. In general, the alloy is used in the quenched and tempered condition. In the present work, fully dense metallic samples were produced from HY100 pre-alloyed powders using selective laser melting (SLM). Test samples were built with varying process parameters (scan speed and laser power). The SLM-built samples were given direct tempering treatment and a standard quench and temper heat treatment. Tensile properties of the samples were evaluated in direct temper, and quench and temper conditions. The study investigates the influence of process parameters and heat treatment on the microstructure and mechanical properties of SLM-built HY100 steel.