Featuring an outer Ni‑Cr self‑fluxing alloy coating by laser cladding, it achieves metallurgical bonding rather than the mechanical adhesion of HVOF thermal spraying, delivering 5 times higher bonding strength. 

HVOF thermal‑spray coatings exhibit mechanical adhesion with a bonding strength of 50-80MPa and suffer from inherent porosity. Under cyclic thermal shock during die‑casting operations, the coatings are prone to delamination and spalling, with resultant debris contaminating the cast components. Our process achieves metallurgical bonding with strength of 300MPa, delivering superior durability along with low residual stress, ultra-low dilution, and crack‑free coatings. 

With good high‑temperature resistance, wear and corrosion resistance, as well as good resistance to molten-aluminum adhesion, it improves die casting quality while maintaining high production efficiency.