To temper the entire piece, place it in the furnace.Recheat to the correct temperature to produce the hardness and toughness you want.Remove the metal and cool it quickly.
英
美
- 回火整个工件,将其放置炉中。再加热至能产生所需硬度和韧度的规定温度。将金属拿出并迅速冷却。