板坯结晶器喂稀土对30CrMnMo钢夹杂物和低温韧性的影响  

Effect of Slab Mold Feeding RE on Inclusions and Low Temperature Toughness of Steel 30CrMnMo

作　　者：陈本文[1,2] 苏春霞[1,2] 赵刚[1,2] 付超[1,2] 杨晰[1,2] 杨成[1,2] 

机构地区：[1]海洋装备用金属材料及其应用国家重点实验室,鞍山114009 [2]鞍钢股份技术中心,鞍山114009

出　　处：《特殊钢》2017年第5期65-67,共3页Special Steel

摘　　要：在300 mm×1950 mm板坯结晶器宽面中心两侧500 mm处向30CrMnMo钢(/%:0.31C,0.48Si,1.44Mn,0.011P,0.001S,1.20Cr,0.71Mo,0.040Als)喂入0.017%RE。分析结果表明,稀土收得率95%以上,在钢中分布均匀,改变了钢中夹杂物形态,大多数夹杂呈球状,与不加RE 30CrMnMo调质钢相比,含0.017%RE30CrMnMo钢60 mm板调质后-40℃冲击功(K_(V2))由50.9~56.6 J提高至77.6~81.6 J。0.017% RE is fed in steel 30CrMnMo （/%： 0.31C, 0.48Si, 1.44Mn, 0.011P, 0.001S, 1.20Cr, 0. 71Mo, 0. 040Als） at both side distance 500 mm from broad face center of 300 mm× 1 950 mm slab mold. Analysis results show that the yield of RE is more than 95%, the distribution of RE in steel is uniform, the inclusions in steel is modified and most inclusions are spheroidal; as compared with quenched-tempered non-adding RE steel 30CrMnMo, the impact energy （ Kv2 ） at - 40 ,2 of quenched-tempered 60mm plate steel 30CrMnMo containing 0. 017% RE increases from 50. 9 ~ 56.6.1 to 77.6 ~81.6J.

关 键 词：30CrMnMo钢 300 mm×1950 mm板坯 结晶器喂稀土丝 夹杂物 -40℃低温冲击功 

分 类 号：TF341.6[冶金工程—冶金机械及自动化]