摘要
为研究稀土元素对过共析钢非金属夹杂物和显微组织的作用机理,在过共析钢中添加了少量的稀土Ce元素,通过冶炼控制O、S含量,保证了稀土Ce元素在钢中的收得率,研究了稀土Ce元素对过共析钢拉伸性能、非金属夹杂物、珠光体片层间距等的影响。结果表明:与稀土Ce元素结合的非金属夹杂物尺寸约为5μm,加入少量稀土Ce元素可以使氧化物类夹杂物形貌发生变化;消除过冷度对珠光体片层间距的影响后,稀土Ce元素可以使过共析钢的抗拉强度提高19 MPa,面缩率降低2%;添加与未添加稀土Ce元素的过共析钢盘条性能不同,主要与珠光体片层间距的大小和均匀性有关,稀土Ce元素的添加可以细化、均匀珠光体片层间距,提高过共析钢盘条的同圈性能均匀性。
To study the mechanism of rare earth elements on non-metallic inclusions and microstructure of hypereutectoid steel,a small amount of rare earth Ce element was added to the hypereutectoid steel,and the recovery rate of rare earth Ce element in the steel was ensured by controlling the oxygen and sulfur content through smelting.The effects of rare earth Ce element on the tensile properties,non-metallic inclusions and pearlite interlamellar spacing of the hypereutectoid steel were studied.The results show that the size of non-metallic inclusions combined with rare earth Ce element is about 5μm.Adding a small amount of rare earth Ce element can modify the morphology of non-metallic inclusions,resulting in changes in the morphology of oxidized inclusions.After eliminating the effect of undercooling on the pearlite interlamellar spacing,rare earth Ce element can increase the tensile strength of the hypereutectoid steel by 19 MPa and reduce the surface shrinkage by 2%.The difference in property between the hypereutectoid steel wire rods with and without rare earth addition is mainly related to the size and uniformity of the pearlite interlamellar spacing.The addition of rare earth Ce element can refine and uniform the pearlite interlamellar spacing,improving the property uniformity of the hypereutectoid steel wire rods in the same circle.
作者
赵晓敏
银志军
涛雅
胡波
牛斌
石龙
ZHAO Xiaomin;YIN Zhijun;TAO Ya;HU Bo;NIU Bin;SHI Long(Technology Center,Inner Mongolia Baotou Steel Union Co.,Ltd.,Baotou 014010,China;Steelmaking Plant,Inner Mongolia Baotou Steel Union Co.,Ltd.,Baotou 014010,China;Long Material Factory,Inner Mongolia Baotou Steel Union Co.,Ltd.,Baotou 014010,China;Institute of Railway Architecture,China Academy of Railway Science Corporation Limited,Beijing 100081,China;Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100083,China)
出处
《轧钢》
北大核心
2024年第2期23-29,35,共8页
Steel Rolling
基金
中国铁道科学研究院项目(2020YJ035)
内蒙古科技兴蒙项目(2022YFXM0009)。
关键词
过共析钢
稀土Ce元素
非金属夹杂物
组织性能
珠光体片层间距
hypereutectoid steel
rare earth Ce element
non-metallic inclusion
microstructure and properties
pearlite interlamellar spacing
