In order to control structure non-uniformity and carbide segregation of high speed steel ingot

ingots of small size are usually produced by ESR

but its production efficiency is low

the rate of finished product is low. Long electrosiag billets with small specifications for ESR fest Withdrawing can improve production efficiency and finished product rate

we made 160 mm x 160 mm square billet of M2 high speed steel using T-type conductive crystallizer for ESR fast Withdrawing with different melting speed and forged and rolled

through the detection and analysis of the composition

low magnification

cast structure and carbide irregularity of the electroslag billet and the size of large particles of carbide

mean¬while

it is compared and analyzed with Φ 220 mm ingot rolling for conventional ESR

analysis shows that electroslag billet for ESR fast Withdrawing with 400 kg/h remelting speed has stable composition and good macrostructure

the carbide variability and carbide dimensions of large particles of rolled materials produced are similar to those Φ 220 ingot rolling materials for conventional ESR

and the production efficiency and the rate of finished products have been improved obviously.