Fig 12 Effect of heat treatment on the ductility of a 6 P electroless nickel coating

Hardness and wear resistance are extremely important properties for many applications. As deposited, the microhardness of electroless nickel coatings is about 500 to 600 HVi00, which is approximately equal to 48 to 52 HRC and equivalent to many hardened alloy steels. Heat treatment causes these alloys to age harden and can produce hardness values as high as 1100 HV100, equal to most commercial hard chromium coatings (Ref 2, 12). Figure 13 shows the effect of different 1-h heat treatments on the hardness of electroless nickel containing 10 2 % P (Ref 2).

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