Not only high speed milling quench steel ensures quality of manufactured surface, but only it can obtain high production efficiency.

淬硬钢高速铣削加工既可以保证加工表面的质量，又可以获得较高的生产效率。

youdao

In his good works, an artist should seize the subtle balance between clarity and obscurity, just like a forger to seize the right time to quench steel.

好的作品应当在藏与露之间掌握住微妙的平衡，这有如锻造工把握淬火最佳时间的玄妙。

youdao

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。

youdao