9SiCr常压氮气-雾化水混合物喷射淬火的实验研究

he Alloy steel is quenched by a certain proportion of mixture gas of nitrogen and vapor under normal pressure and low velocity, and the continual cooling curve is determined. The results show that it can improve the cooling effect of quenching medium on the one hand; on the other hand, it can decrease the deformation and residual stress of workpieces. The results show that cooling performance of the mixture and cooling velocity can be enhanced with gas pressure increasing, when the mix ratio is fixed, and it takes short time to cool to room temperature; The cooling performance of the mixture and cooling velocity can be enhanced with the mix ratio of the mixture increasing under the same pressure, and it takes short time to cool to the room temperature.