| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of forming a thick hardened layer having high hardness on a soft Al surface for obtaining a high hardness, lightweight member and wear resistant parts obtained by using Al. SOLUTION: In the method, the surface 1 of a base material consisting of Al or an Al alloy is coated with a mixture of Ni particles 2, Si-containing Al alloy particles 3 having a melting point of≤610°C and flux 4. The base material is heated in an inert gas atmosphere at≤600°C, so that the Al alloy is melted to form a hardened layer consisting of a melted Al alloy 6 and an alloy layer and/or a compound layer 5 of a Ni-Al alloy on the surface of the base material. The particles used in the method is preferable to have a diameter of≤120μm and has the content of Ni controlled to 40 to 90% and the content of the Al alloy, preferably, of an Al-10%Si eutectic alloy controlled to 10 to 60%. The content of the fluoride based flux is controlled to 5 to 30% of the metal content. A high boiling point metal or an active metal can be contained in addition to the above composition. COPYRIGHT: (C)2004,JPO
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