PURPOSE: To obtain a clad material whose interlayer joining strength is satisfactory by superposing the stock metallic plates of the clad of two layers or above, and thereafter, superposing a peeling material on both sides, putting the whole into the bag of a foil or a sheet of stainless steel, etc., allowing the inside to form a vacuum and applying atmospheric pressure, and heating it.
CONSTITUTION: SUS 304 stainless steel 2 is held by copper plates 1, and used as a stock of the clad. On both its sides, 18Cr-3Al steel in which a temper color is formed is superposed as a peeling material 3, and also, on both its sides, 18Cr ferrite-based stainless steel is superposed as a bag 4. The circumference of this bag is brought to seam welding 5, and after attaching a pipe 6 to a part thereof, it is allowed to form a vacuum. After forming a vacuum for the prescribed time, the pipe part is brought to seam welding 7 and vacuum sealing is executed. Subsequently, the inside of a roller hearth furnace of a prescribed temperature is heated for the prescribed time, and after it is cooled, and clad plate is taken out of the bag. In such a manner, pressure applied to a joint interface becomes equal, therefore, a clad material which has sufficient strength and whose interlayer joining strength is satisfactory is obtained.
SASAKI MASAHIRO
YOKOYAMA KAZUHISA
ARAI HIROSHI
| JPS6363582A | 1988-03-19 |