Weathering-resistant steel fastener with rare earth added compositely and preparation method of weathering-resistant steel fastener

The invention relates to the technical field of weathering resistant steel, and provides a rare earth compound added weathering resistant steel fastener which comprises the following components in percentage by mass: 0.45 to 0.51 percent of C, 0.22 to 0.26 percent of Si, 0.60 to 0.80 percent of Mn, 0.72 to 1.04 percent of Cr, 1.03 to 5.01 percent of Ni, 0.21 to 0.30 percent of Cu, 0.020 to 0.068 percent of Ce, 0.10 to 0.18 percent of Ti, 0.18 to 0.24 percent of Mo, less than or equal to 0.018 percent of P, less than or equal to 0.004 percent of S and the balance of Fe. The invention further provides a preparation method of the weathering resistant steel fastener with the rare earth compositely added. The invention has the advantages of excellent mechanical properties and excellent marine atmospheric corrosion resistance, and is suitable for harsh marine atmospheric environment. 本发明涉及耐候钢技术领域，提供了一种稀土复合添加的耐候钢紧固件，以质量百分含量计，包括如下组成：C：0.45～0.51％，Si：0.22～0.26％，Mn：0.60～0.80％，Cr：0.72～1.04％，Ni：1.03～5.01％，Cu：0.21～0.30％，Ce