| 摘要 |
PROBLEM TO BE SOLVED: To easily obtain a clad material of hardly having a restriction on the dimension by heating a copper alloy raw material charged in a vessel of steel higher than the temperature of generating the liquid phase in the raw material, joining the heated copper alloy with the steel composed of a part of the vessel and making them as one body. SOLUTION: An uniform mixture of an alloy powder mixture 1 blended with bronze powder and brass powder and a dry borax anhydride is arranged on a bottom plate 2 of a box of soft steel, a graphite powder is scattered on the upper in a degree of without being exposed of the alloy powder and a graphite coating layer 6 is made, and the surface of the copper alloy powder is coated. Then, a soft steel lid 4 installed with a small hole 7 is mounted, and these are assembled with a welding part 5 spot-welded on a part of the circumference to side plates 3A, 3B with shielded arc welding. This is placed inside an electric furnace, after heating, melting, then cooling, further taking out outside the furnace and it is air cooled naturally. The obtained clad plate is formed with the copper alloy layer on the soft steel bottom plate as the base material and it has a sound joining state without defects of blow holes, etc. |
