With the development of aerospace technology

the kinds of bearing steel and temperature of bearing capacity are gradually improved. The heat treatment technology of bearing steel plays a key role in the service life and bearing performance of bearing steel. The heat treatment technology of bearing in domestic aerospace industry has been in the development stage

and there is still some room for improvement compared with the heat treatment technology of bearing steel of abroad. By collecting the heat treatment literature of bearing steel in recent years and decades

the development status of heat treatment technology of bearing steel in aerospace industry at home and abroad is summarized. The heat treatment technology of GCr15

8Cr4Mo4V

G13Cr4Mo4Ni4V bearing steel is briefly described. The structure of martensite isothermal quenching

bainite isothermal quenching

martensite + bainite mixed isothermal quenching of GCr15 bearing steel is introduced. The heat treatment method

parameters and structure of M50 bearing steel of abroad are introduced in detail.