Adherence is a key indicator to characterize bonding strength between porcelain glaze and steel sheet. With different carbon content in the low-carbon enameled steel (/% ；0.020 ~0.050C

0.004 ~0.039Si

0.12 〜0.24Mn

0.008 ~ 0.024P

0.002 ~ 0.007S

0. 0026 ~0. 051A1)

the shape

distribution and morphological characteristics of carbide before and after enameling and the effect of carbon content on porcelain glaze adherence are investigated. Result shows that carbon exists in annealed cold-rolled steel as free cementite before enameling

but as pearlite and grain boundary cementite after enameling. Pearlite and cementite are not easily to dissolve in porcelain glaze

in addition

the cementite inhibits the chemical reaction between Fe and porcelain glaze

which lower the bonding strength between sheet and porcelain glaze. As the carbon content is controlled 0.030%

the enamel steel adhesion is better to meet the requirements of use.