By measuring the cooling curve and quench severity of quenching oil at various flow rates, the relationship among the hardening capacity, quench severity and flow rate was established.
With increasing of nitrogen pressure, the cooling capacity of nitrogen, the cooling velocity and hardness of the workpieces after quenching are improved.
随着氮气压力的提高，气体的冷却能力、工件的冷却速度、工件淬火后的硬度等都得到了不同程度的提高。
3
The results show that proper quenching not only increase discharge capacity greatly but also can improve cycle stability and discharge voltage property.