Titanium alloy surface gradient hardening layer and method for titanium alloy surface gradient hardening
By combining laser remelting nitriding and cladding nitriding composite processes with high-temperature solution treatment and low-temperature aging heat treatment, the problems of surface hardness and wear resistance of titanium alloys were solved, and the uniformity of the microstructure and wear resistance of the gradient hardened layer were improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- AVIC BEIJING INST OF AERONAUTICAL MATERIALS
- Filing Date
- 2026-04-20
- Publication Date
- 2026-07-17
AI Technical Summary
Titanium alloys have low hardness and poor wear resistance. Traditional laser nitriding processes suffer from surface delamination, drastic changes in hardness, and softening of the heat-affected zone, which limits their application.
A composite process of laser remelting nitriding and laser cladding nitriding is adopted, combined with high-temperature solution heat treatment and low-temperature aging heat treatment, to form a gradient nitriding hardened layer. By controlling the dissolution and precipitation of the precipitated phase, the hardness gradient distribution is optimized.
It significantly improves the wear resistance of titanium alloy surfaces, reduces the risk of stress concentration caused by microstructure delamination, and achieves gradient distribution of hardness and uniform microstructure.
Smart Images
Figure CN122406145A_ABST