Quench Cracks: Cracks formed in a steel part during or after quench, resulting from high stresses in cooling; could be caused by water in the quench oil.
淬火裂纹：裂纹在钢材的淬火或淬火后形成，由于冷却时的高应力所造成；也有可能是在淬火油中的水所导致。
2
When fast quench and temper cooling speed are adopted at the same time, the high impact toughness will be gotten.
淬火和回火同时快冷可以获得较高的冲击韧性。
3
The furnace unit is consisted of a hydrogen supply source, a high temperature pit furnace, a furnace pot, a slow-cooling furnace, and a quench tank.