Forging: 1.100 ~ 900 ℃ Annealing: Heat to 800-850 ℃, and stayed at this temperature two to four hours in the oven allowed to cool gradually. Quenching: the first pre-heated to 550-600 ℃, time heated to 950 ℃, and then heated to a: 1,220 ~ 1250 ℃; b: 1,200 ℃ ~ 1230 ℃. Hardened in oil, but oil must be moisture 40-60 ℃ (a. general tools; b. toughness are required in the form of complex tool) Tempering: heating to 550-570 ℃, the temperatures stay in, and then in still air cooling, tempering must repeat the second Hardness: HRC63 ℃ above. Uses: This high-speed steel, tungsten steel, suitable manufacturing powerful cutting wear and impact resistance of various tools, and advanced die, screw die, more complex tools required toughness and shape, cutter, drill and so on.