| 摘要 |
A method for producing a metal film composed of an alloy having more than 50% nickel (a) melts the alloy in amounts of more than one ton in a vacuum induction furnace, or openly in an induction or arc furnace, followed by treatment in a VOD or VLF installation, (b) the alloy is cast into blocks, electrodes or as continuous casting to form a pre-product, (c) the pre-product is annealed if necessary at temperatures between 800° C.-1350° C. for 1-300 hours under air or protective gas, and (d) hot rolled between 1300° C.-600° C. to reduce the thickness of the starting material by a factor of 1.5-200, such that the pre-product has a thickness of 1-100 mm after the rolling and is not recrystallized, recovered, and/or is (dynamically) recrystallized having a grain size less than 300 μm, (e) the pre-product is pickled, (f) then cold worked to produce a film with a degree of deformation greater than 90% to a final thickness of 10-600 μm, (g) the film is cut into strips of 5-300 mm after the cold working, (h) the film strips are coated with a ceramic powder loosely or by an adhesive or by an oxide dissolved in alcohol or covered with a separating film and, if necessary, dried, (i) the film strips are wound annularly onto one or more mandrels or one or more sleeves, wherein the inner and the outer end are each spot-welded or clamped, (j) the annularly wound film strips are annealed under protective gas at temperatures between 600° C.-1200° C. for 1 min to 300 h, (k) wherein the annealed film-like material is recrystallized after the annealing and has a large proportion of cubic texture. |
