Claw assembly with long service life and production process thereof

The invention discloses a claw assembly with long service life and a production process thereof, which are used for manufacturing parts with mutual friction in an operation process of the claw assembly of a nuclear reactor control rod driving mechanism. The process comprises the following steps which are carried out in sequence: discharging, roughly machining and machining a wear-resisting layer on the surface. The step of discharging is to machine blanks of all parts according to design requirements; the step of machining the wear-resisting layer on the surface is to spray and weld the wear-resisting layer on the surface of each blank; and the step of spraying and welding the wear-resisting layer comprises the following steps which are carried out in sequence: pre-heating, spraying powder and re-melting, and cooling. In the claw assembly disclosed by the invention, the sprayed and welded wear-resisting layer or the surfaced wear-resisting layer is arranged on the surface of each part with the friction in the operation process. The invention provides the claw assembly with the long service life and a corresponding manufacturing process, and the obtained claw assembly meets the requirements on the wear resistance under a high-frequency working condition within a 60-year service period.