Surface hardened aluminum part and method of producing same

A surface hardened aluminum part comprising an alloy layer formed on the surface of an aluminum base material made of aluminum or an aluminum alloy,

• said alloy layer formed from a nickel aluminum alloy powder of which particles are evenly dispersed therein and
• said nickel aluminum alloy powder containing 10 to 75% by weight of nickel with respect to aluminum.

A method for producing a surface hardened aluminum part comprising:

• (a) first, providing an aluminum base material made of aluminum or an aluminum alloy with an aluminum alloy powder including at least a powder of one type of aluminum alloy made of aluminum and at least one metal selected from a group of metals each of which forms an intermetallic compound of high hardness with aluminum;
• and
• (b) second, forming an alloy layer by melting the aluminum alloy powder supplied onto the aluminum base material by use of a high-density energy heat source so as to be alloyed with the aluminum or aluminum alloy contained in the aluminum base material.

A method for producing a surface hardened aluminum part comprising:

• (a) first, providing an aluminum base material made of aluminum or an aluminum alloy with an aluminum alloy powder including a nickel aluminum alloy containing 10 to 85% by weight of nickel with respect to aluminum;
• and
• (b) second, forming an alloy layer by melting the aluminum alloy powder supplied onto the aluminum base material by use of a high-density energy heat source so as to be alloyed with the aluminum or aluminum alloy contained in the aluminum base material.