Abstract: In order to improve the wear resistance of superalloy GH4049 sphere and extend its service life, the surface of superalloy GH4049 sphere was aluminized by using the solid aluminization method, and the influences of different aluminizing temperatures and time on the depth and hardness of the aluminum layer were investigated. The results show that the depth of the aluminum layer increases with the increase of aluminizing temperature and time, but the hardness of the core decreases.When the aluminum infiltration temperature is 950 ℃, and the aluminum infiltration insulation time is 10-12 h, the obtained aluminum infiltration layer depth is 30-50 μm, and the core hardness reaches 30.5-37.5 HRC, which can meet the production process requirements.