| 摘要 |
PURPOSE:To produce a thin clad sheet material consisting of Au or Au alloy and stainless steel by superposing an annealed stainless steel sheet material and an Au or Au alloy sheet material via Ni and subjecting the materials to rolling and soft annealing under adequate conditions. CONSTITUTION:A stainless steel sheet material which is annealed to <=180 hardness Hv and has 1.0-3.0mm. thickness and an Au or Au alloy sheet material clad with an Ni or Ni alloy sheet material are superposed with said Ni or Ni alloy layer in-between and the sheet materials are subjected to hot rolling at 30-70% draft at 600-800 deg.C in a gaseous H2 or inert gaseous atmosphere contg. H2, by which the sheet materials are clad. The hot rolled clad material obtd. in the above-mentioned way is subjected to >=1 pass of cold rolling at <=75% cumulative draft including intermediate annealing in a vacuum or non-oxidizing atmosphere to a final sheet thickness. The thin clad sheet thus obtd. is held for 1- 12hr at 700-850 deg.C, by which the sheet is soft-annealed. The thin clad sheet material consisting of the Au or Au alloy and the stainless steel having high work hardenability and high difficultly workability is thus obtd. |
