The Effect of Quenching and Partitioning (Q&P) Process on the Structural and Mechanical Properties of AISI 4130 Steel

In this study, the effect of quenching and partitioning (Q&P) heat treatment on structural mechanical properties AISI 4130 steel was investigated. The Q&P process followed at a quench temperature 270 oC three different temperatures 270, 330, 380 oC. phase characterization prepared spicimens were done using X-ray diffractometer (XRD) scanning electron microscopy (SEM), respectively. samples also monitored by hardness tensile test according to ASTM E8 standard. results showed that strength can be increased up 1450 MPa while maintaining elongation percentage (about 9.6%) performing steel. This is about 20% greater than obtained usual tempering in Optimum time for determined 330 °C 120 minutes, respectivly. Partitioning lower could not stabilize austenite phase, higher caused decomposition carbide precipitation.