Effect of iron stearate and heat-treatment conditions on the structure and mechanical properties of powder low-alloy steel

The article investigates the effects of iron stearate and different heat-treatment conditions on the structure and mechanical properties of powder low-alloy steel. It highlights the unique challenges posed by powder steels, such as decarbonization, oxidation, and reduced thermal conductivity, which necessitate specialized heat treatment methods. The study focuses on SP50S2KhF steel, examining the impact of varying amounts of iron stearate and different quenching and tempering temperatures. Key findings include the optimal heat treatment conditions for maximizing hardness and flexural strength, with iron stearate playing a crucial role in reducing porosity and enhancing mechanical properties. The microstructure analysis reveals a fine-needled tempering troostite structure with rounded pores, contributing to the material's improved performance. This research underscores the importance of tailored heat treatment processes in achieving superior mechanical properties in powder steels, offering practical insights for industrial applications.