本发明提供一种用于高寒地区高速动车组的车轴钢及其制备方法，所述车轴钢按重量百分比计，C 0.22～0.28％，Si 0.15～0.40％，Mn 0.4～0.65，S≤0.005％，P≤0.010％，Cr 1.4～2.2％，Cu≤0.20％，Mo 0.10～0.15％，V 0.16～0.25％，RE 0.005～0.03％，Ni 1.5～2.0％，Al 0.010～0.045％，余量为Fe和不可避免的杂质。本发明通过合理的成分添加和综合细化技术，获得了成本低、低温性能、抗疲劳性能和淬透性优异的车轴钢。

The invention provides an axle steel for high-speed EMUs in alpine areas, which comprises C 0.22 ‑ 0.28%, Si 0.15 ‑ 0.40%, Mn 0.4 ‑ 0.65%, S ≤ 0.005%, P ≤ 0.010%, Cr 1.4 ‑ 2.2%, Cu ≤ 0.20%, Mo 0.10 ‑ 0.15%, Nb 0.005 ‑ 0.014%, RE 0.005 ‑ 0.03%, Ni 1.5 ‑ 2.0%, Al 0.010 ‑ 0.045%, The remainder is Fe and unavoidable impurities. The method for preparing the axle steel for high-speed EMUs in alpine areas improves the low-temperature toughness, fatigue performance and hardenability of the axle steel through the addition of reasonable components and comprehensive refinement technology.