STUDY ON MODIFICATION OF ANTI-OXIDATION COATING FOR STEEL BILLET

摘要

The relationship between the burning loss rates of steel billet and the heating atmospheres was analyzed, and thereafter, the modified carbon was used to improve the properties of anti-oxidation coating for steel billet. The microstructures of coatings were observed by SEM (scanning electron microscope). The results show that the modified carbon can consume the oxidizing gas from the coating outside, block the direct contact channel between oxidizing gas and steel billet, adjust the atmosphere around the coating, and improve the anti-oxidation effect. Meanwhile, the molten slag penetration resistance and protective time are improved respectively. After burning at 1380℃ for 1 hour, the oxidation burning loss of coating modified by graphite powder can be decreased by 83.14% in mass.