| 摘要 |
There is disclosed a method for producing a metal formed article having a space in the interior thereof, comprising the steps of laying a formed article 2 a of a second metal in a powder 1 containing a first metal to thereby form a powder formed article 3 a and heating and melting the formed article 2 a at a temperature less than a melting point of the first metal and not less than that of the second metal to form a space 4 . Both the metals are sintered and solidified. A coating layer 6 is formed on the space 4 by an intermetallic compound or an alloy of both the metals. When the coating layer 6 is the intermetallic compound, the first metal is one type of Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zr, Nb, Mo, Hf, Ta, and W and an alloy of these elements, and the second metal is Al. The first metal is Ti, V, Cr, Fe, Co, Ni, Zr, Nb, Mo, Hf, Ta, and W and an alloy of these elements, and the second metal is Si. The first metal is Cu or an alloy thereof, and the second metal is Sn. When the coating layer 6 is the alloy, the first metal is Al or an alloy thereof, and the second metal is Zn. |
