Determination of La/CeO2 content in ilmenite electrode coating

• 作 者: Yong-Huan Guo Xi-Ying Fan Liang Zhang Hui Fan Yi-Jun Xu
• 机 构: College of Mechanical and Electrical Engineering, Jiangsu Normal University,Xuzhou Hongyuan Automati
• 出 处: Rare Metals
• 发表日期: 2015年07期
• 关键词: Ilmenite-type electrode Lanthanum/cerium oxide Variance Boxplot Surface chart

The ilmenite welding electrode has advantages of low cost and excellent welding technological properties.However, the welding quality is affected adversely by its poor crack resistance.To solve this problem, 12 kinds of rare earths coating formulas were optimized by means of orthogonal test design and curve fitting.Then the powders containing La/Ce O2 were extruded into ilmenite welding electrode through screw-type pressing–scribbling machine.After that, a series of mechanical properties tests were conducted according to national standards.Next, the mechanical properties data were analyzed comprehensively by analyzing variance, boxplot as well as Minitab 3D surface chart.The results show that compared with the formula without rare earth, the deposited metal’s impact toughness,the lower yield strength, the tensile strength, and the hardness are increased by 54.44 %, 9.25 %, 6.37 %, and4.27 %, respectively.In other words, Electrode 6 with the La/Ce O2 amount of 0.5 %/0.1 % in coating has better mechanical properties.

The ilmenite welding electrode has advantages of low cost and excellent welding technological properties. However, the welding quality is affected adversely by its poor crack resistance.To solve this problem, 12 kinds of rare earths coating formulas were optimized by means of orthogonal test design and curve fitting.Then the powders containing La / Ce O2 were extruded into ilmenite welding electrode through screw-type pressing-scribbling machine. After that, a series of mechanical properties tests were conducted according to national standards. Next, the mechanical properties data was analyzed comprehensively by analyzing variance, boxplot as well as Minitab 3D surface chart. The results show that compared with the formula without rare earth, the deposited metal’s impact toughness, the lower yield strength, the tensile strength, and the hardness are increased by 54.44% 9.25%, 6.37%, and4.27%, respectively. In other words, Electrode 6 with the La / Ce O2 amount of 0.5% / 0.1% in coating h as better mechanical properties.