本发明提供了Cr‑Mo‑Co‑V系贝氏体高温轴承钢及其制备方法。基于所述高温轴承钢的总质量，按质量百分数计，所述高温轴承钢中，C的含量为0.7wt％～0.9wt％；Si的含量为0.1wt％～0.4wt％；Mn的含量为0.1wt％～0.4wt％；P的含量小于等于0 .005wt％ ；S的含量小于等于0.005wt％；Mo的含量为4.0wt％～5.0wt％；Cr的含量为3.5wt～5.5wt％；V和Co的总含量为1.5wt％～5.5wt％；其余为铁和不可避免的杂质。本发明的高温轴承钢具有较高的高温硬度、耐磨性、高强韧性等高温力学性能，有助于延长高温轴承钢的服役寿命。

The invention provides Cr ‑ Mo ‑ Co ‑ V series bainitic high temperature bearing steel and its preparation method. Based on the total mass of the high temperature bearing steel, the content of C in the high temperature bearing steel is 0.7wt%~0.9wt% by mass percentage; The content of Si is 0.1wt% ～ 0.4wt%; The content of Mn is 0.1wt% ～ 0.4wt%; P content is less than or equal to 0.005wt%; The content of S is less than or equal to 0.005wt%; The content of Mo is 4.0wt%~5.0wt%; The content of Cr is 3.5wt~5.5wt%; The total content of V and Co is 1.5wt%~5.5wt%; The rest are iron and unavoidable impurities. The high temperature bearing steel of the invention has high temperature mechanical properties such as high temperature hardness, wear resistance, high strength and toughness, which is helpful to prolong the service life of the high temperature bearing steel.