低合金高强度结构钢Q345D连铸坯中大型夹杂物的研究  

RESEARCH ABOUT LARGE INCLUSION IN CONTINUOUS CASTING BILLET OF Q345D LOW-ALLOY HIGH-STRENGTH CONSTRUCTIONAL STEEL

作　　者：栾文林[1] 刘志远[1] 

机构地区：[1]河北钢铁集团唐钢中厚板材有限公司,河北唐山063000

出　　处：《河北冶金》2012年第12期10-12,共3页Hebei Metallurgy

摘　　要：对低合金高强度结构钢Q345D连铸坯中大型夹杂物的类型、数量、尺寸以及分布情况进行了研究,并通过示踪剂追踪分析了钢中夹杂物的来源。研究表明:正常铸坯中的大型夹杂物的含量为26.76mg/10 kg,粒度分布在50～100μm;有SiO2夹杂、SiO2-CaO-Al2O3复合夹杂和硫化物夹杂等3类,主要来源于脱氧产物,其次为结晶器保护渣、中包覆盖剂和钢包渣的卷渣。It is researched the type, quantity, size and distribution of large inclusion in continuous casting bil- let of Q345D low - alloy high - strength constructional steel, tracked and analyzed the source of the inclusion in steel with tracer . It is showed from the research that the quantity of large inclusion in normal billet is 26.76 mg/10kg, its particle size distributes from 50 to 100 μm; the inclusion mainly included SiO2 , SiO2 - CaO- Al2O3 and sulfide, and the source is mainly deoxidation products, and secondly casting powder of mold, protective agent of tundish and slag of ladle.

关 键 词：低合金高强度结构钢 大型夹杂物 示踪法 研究 

分 类 号：TF777[冶金工程—钢铁冶金]