Study On Metallurgical Characteristics Of Mold Flux For 1Cr13 Stainless Steel Continuous Casting

1Cr13 stainless steel with high hardness,toughness,good corrosion resistance is often used in the manufacture of anti weakly corrosive medium and load bearing parts.However,longitudinal depression and longitudinal cracks are easy to occur in 1Cr13stainless steel billet during continuous casting,which seriously affects the quality of the billet.A the lubricating property of mold flux will deteriorate,and even the breakout accident will occur in serious cases.Based on this,in order to solve the contradiction designs two types of mold flux.Firstly,Factsage7.3 was used to design the slag system,combined with high temperature infrared slag heat transfer performance test system and mold simulator,the metallurgical properties of the two types of mold flux were evaluated.The main conclusions are as follows:1)After increasing the basicity of type A mold flux,the melting temperature and transition temperature of mold flux increase,and the viscosity decreases.When the content of Li₂O in type.w（MgO）reduces the mold flux transition temperature between 2%and 4%,and w（MgO）increases the mold flux transition temperature between 4%～10%.As w（MgO）increases the slag network structure is simple.2)After increasing the basicity of type B mold flux,the melting temperature of mold flux will increase.When R=0.8,Na₂O mass fraction is 8%～10%,and Na₂O mass fraction is between 6%and 8%,the heat flux density decreases.The effect is remarkable.XRD detection found that the main precipitates were close to the simulation results.3)Using the molten steel solidification simulation system in the continuous casting,the effect of the heat transfer phenomenon between the copper mold and the blank shell is studied.group A and B mold fluxes,decreased by 0.155 MW/m² and 0.150 MW/m².Figure 70;Table 29;Reference 65.