In order to optimize the comprehensive properties of X65 pipeline steel and reduce the influence of non-metallic inclusions on the properties of steel,the evolution law of non-metallic inclusions in X65 pipeline steel was investigated.Through the industrial test,the samples of LF inlet,LF outlet,VD void breaking,end of calcium feeding line,end of soft blowing,opening of tundish,as well as on the casting billet and hot rolled plate.The results show that the type and shape of non-metallic inclusions change when LF enters and leaves the station.The types and contents of nonmetallic inclusions changed after VD clearance compared with calcium treatment.The types of nonmetallic inclusions in soft blown,tundish,continuous casting billet and hot rolled sheet steel have not changed obviously,but the quantity and content have changed.According to the test results,the type,size and content of non-metallic inclusions in steel can be effectively controlled by adopting appropriate optimization measures.
关键词
X65管线钢/非金属夹杂物/钢液/演变规律
Key words
X65 pipeline steel/non-metallic inclusions/molten steel/evolution law
维普
万方数据