Mg脱氧对船板结构钢中夹杂物的影响  

Effect of Mg deoxidation on evolution of inclusions in shipbuilding structure steel

作　　者：徐龙云[1,2] 杨健[2] 王睿之[2] 祝凯[2] 周乐君[1] 王万林[1] 

机构地区：[1]中南大学,湖南长沙410083 [2]宝山钢铁股份有限公司,上海201900

出　　处：《宝钢技术》2014年第6期1-6,共6页Baosteel Technology

摘　　要：研究了Mg脱氧对于船板结构钢中微米级夹杂物演变行为的影响。钢中典型夹杂物是中心为氧化物、外围为Mn S的复合夹杂物。随着钢中Mg含量的增高,独立氧化物和独立硫化物的数量减少,氧化物和硫化物的复合夹杂物数量增多,同时夹杂物的尺寸减小、数量增加。随着钢中Mg含量从0升高到27×10-4%、38×10-4%、99×10-4%,夹杂物中心氧化物成分的变化趋势是:Al2O3→(Mg-Al-Ti-O)→Mg O。The effect of Mg deoxidation on the evolution behavior of inclusions larger than 1 μm in the shipbuilding structure steel was investigated based on the experimental studies. The typical inclusions found in the steels were the complex inclusions comprising central oxide and peripheral MnS. With the increase of Mg content in the steel, the inclusion numbers of isolated oxide and isolated sulfide decrease, and the number of the complex inclusions comprising central oxide and peripheral MnS increases. Furthermore, the size of inclusions decreases and the number density of inclusions increases. With the increase of Mg content in the steel samples from 0 to 27 × 10^-4%, 38 × 10^-4% and 99 × 10 ^-4% , the phase of central oxide inclusions tend to change sequentially from Al2O3 to （ Mg - Al - Ti - O） , and MgO.

关 键 词：Mg脱氧 夹杂物 船板结构钢 热影响区 

分 类 号：TG142.1[一般工业技术—材料科学与工程]