The change of inclusions in the VOD + LF refining process of 304 stainless steel was studied. Before and after the beginning and end of the smelting process of the second VOD furnace with continuous casting and continuous casting

before and after the beginning and end of the weak agitation process of the LF furnace

mid-term tundish casting

the continuous casting billet is sampled

and the use of chemical composition analysis

metallographic observation and electron microscopy were used to detect it. It is found that the T[O

]

production process of 304 stainless steel gradually decreases with the process. The number of inclusions is on the rise before LF weak agitation. Then the process flow is gradually reduced. The morphology of inclusions is dominated by oxides of Cr

2

O

3

and MnO before the reduction process is carried out. After the reduction process

the m

ain silicate inclusions are found. After the weak agitation of LF refining

the inclusions changed into spherical inclusions with calcium aluminate as the main inclusions. At the same time

the formation mechanism of inclusions was analyzed and studied.