Chemical composition:
C: 1.05 ~ 1.20
Si ≤ 0.60
Mn ≤ 0.40
W: 5.50 ~ 6.75
Mo: 4.50 ~ 5.50
Cr: 3.80 ~ 4.40
V: 1.75 ~ 2.20
Al: 0.80 ~ 1.20
S: ≤ 0.030
P: ≤ 0.030

Mechanical properties:
Item heating temperature / ℃ start temperature / ℃ termination temperature / ℃
1140 - 11,701,050 ingot forging 950 ~ 1000 ~ 1100
Billet forging 1120 ~ 1140 1030 ~ 1050 ≥ 900
Billet rolling 1100 ~ 1140 1050 ~ 1100 ≥ 900


Note: Due to poor thermal conductivity of high-speed steel, the steel ingot (or billet) installed furnace at a temperature not higher than 400 ℃, low temperature phase of slow heating (≤ 300 ℃ / h), to 850 ℃ heat 1h, and then you can with the oven temperature to forging heating temperature; 2 forging hammer cogging ingots should be light, with the cast before the gradual destruction of tissue and gradually add heavy hammer force. And try to break it evenly distributed carbides, must hammer become useful; 3 stop forging temperature has great influence on the carbide distribution. Stop forging temperature can reduce the degree of increase in carbide grinding, but stop forging temperature is too low will significantly deteriorate the plastic, resulting in cracks; 4 is larger than forging a more uniform distribution of carbides was an important measure; 5 forging easy to produce high-speed steel corner crack. Tools should be removed promptly corner crack has been generated, to avoid the defects continue to expand; 6 for W6Mo5Cr4V2Al steel can be hardened when cold air, so time after forging into the ash heap or cold, for slow cooling.