The powder no-adding carbon of which the main ingredient is TC 1. 10~1.22,Al
2
O
3
5.03~5.62,Na
2
O 3.29~3.40,CaO/SiO
2
=0.55~0.58 has been developed to reduce the recarburization of 10.3 t ingot of 0.03~0.07 C cold heading steel.The powder has high melting temperature (1300℃)
high viscosity(1.5 Pa · s at 1500 ℃)and low bulk density(0.38~0.40 g ·cm
-3
)
that is available to decrease melting speed of powder(5.70~5.96 g/min).Pilot production results showed that the occurred ratio of recarburization was ≤5%.