Influence of Carbon Content on the Formation of a Contact Interparticle Surface during Hot Post-Pressing

Introduction. The technology for producing hot-formed powder steel is one of the most energy-intensive in metallurgy, which includes a large number operations. study influence technological modes on final properties part an urgent task. Developed by scientific team under leadership Yu. G. Dorofeev at end XX century, manufacturing steels currently main ones production high-density products. However, use new materials that improve mechanical products requires modern approach to analyzing quality interparticle splicing particles. following factors formation qualitative was established: blank density, granulometric composition initial charge, temperature and holding time during heating, ratio its dimensions, deformation rate. objective analyze effect graphite-containing component alloys due high-quality splicing. Materials Methods. work used domestic foreign powders produced PAO Severstal Swedish company Höganäs with addition carbon GC-1 (GOST 4404-78). Hot stamping carried out crank press K2232 model maximum force 1600 kN. heating workpieces varied between 800-1200 ºC. Results. As result experiments, sintering duration established. reason change are local inclusions graphite, did not have homogenize as prolonged sintering. Technological hot been developed affect preservation or destruction pre-formed contact surface. Discussion Conclusion. studies shown additional plastic contributes intracrystalline fusion entire graphite charge improves alloyed iron practically does unalloyed powder.