Thermodynamic Study on Precipitation Behavior of Inclusions in09CuPCrNi Steel with Rare Earth during Solidification

摘要：

　　To improve the comprehensive properties of09CuPCrNi weathering steel,rare earth elements were added to control the precipitation behavior of inclusions.A couple thermodynamic model of inclusions precipitation and elements segregation was established to quantificationally evaluate the precipitation behavior of inclusions in 09CuPCrNi weathering steel.The effects of types and addition amount of rare earth on the precipitation behavior of inclusions were investigated by the model.The existence state and variation of rare earth in clean09CuPCrNi steel were further discussed.The results showed that the types of inclusions in 09CuPCrNi steel transform from Al2O3,Ce2O2 S and MnS to CeN,Ce3S4 and Ce2O2 S with increasing the addition of Ce.And with the increase of La addition,the types of inclusions alter from A12O3,MnS and LaAlO3 to LaN,LaS and LaAlO3 in 09CuPCrNi steel.When the additions of Ce and La respectively arrive to 0.025% and0.01%,Al2O3 can not precipitate.MnS can not precipitate when the additions of Ce or La arrive to 0.045%.The precipitation temperature of MnS decrease with the Ce or La addition increasing.

关键词： rare earth weathering steel inclusions thermodynamic model

作者: Li Yandong Liu Chengjun Jiang Maofa

作者单位: School of Materials and Metallurgy, Northeastern University, Shenyang, 110819, Liaoning, China

会议类型: 国际会议

会议名称: The 4th Australia-China-Japan Joint Symposium on Iron and Steelmaking(第四届中日澳钢铁冶金学术会议)

会议地点: 沈阳

会议语种:英文

页码: 291-294

在线出版日期: 2012-11-03（万方平台首次上网日期，不代表论文的发表时间）