M2高速钢（/%：0.86C,0.39Si,0.32Mn,0.015P,0.006S,6.00W,4.00Cr,4.80Mo,1.85V）Φ183 mm圆坯由2.0 t电渣锭（Φ~500 mm）锻制而成。M2钢锻......