PRODUCTION OF ALUMINUM ALLOY MATERIAL HAVING SUPERIOR WEAR RESISTANCE

摘要

PURPOSE:To produce an Al alloy material having superior wear resistance and durability by locally melting the surface of an Al or Al alloy base material together with a metal and a wettability improving element such as B fed from the outside of the base material to form a hard alloyed layer. CONSTITUTION:A shallow groove 2 is cut in the surface of an Al or Al alloy base material 1 and powder 3 of a mixture of one or more kinds of metals such as Ni, Mn and Fe or hard particles of one or more kinds of compds. such as TiC and ZrN with one or more among B, Si and Ge as wettability improving elements is fed from the outside of the base material 1 and embedded in the groove 2. The surface of the base material 1 is locally melted together with the powder 3 by irradiation with laser beams 4 to form a hard alloyed layer 5 contg. an Al-contg. intermetallic compd. crystallized in the Al matrix or a hard alloyed layer 5 contg. the hard particles alloyed with the Al matrix in the surface of the base material 1 in one body. An Al alloy material having superior wear resistance, not causing exfoliation and capable of ensuring satisfactory durability is obtd.