Improvement in Mechanical Properties of Cryogenically Treated WC-5 wt% NbC Hard Materials Sintered by Pulsed Current Activated Sintering

Recently, the necessity of designing and applying tool materials that perform machining difficult-to-cut in a cryogenic treatment where demand is increasing. The objective this study to evaluate performance cryogenically treated WC-5 wt% NbC hard fabricated by pulsed current activated sintering process. densely consolidated specimens are exposed liquid nitrogen for 6, 12, 24 h. All samples exhibit compressive stress sintered body compared with untreated sample. Furthermore, change lattice constant leads specimens, which improves their mechanical performance. significant improvement properties, 10.5 % increase Vickers hardness 60 decrease rupture strength samples. However, deep over h deteriorates properties indicating excessive causes tensile specimens. Therefore, time should be controlled precisely obtain mechanically enhanced materials.