| 摘要 |
The invention relates to a method of producing an aluminium alloy brazing sheet for the manufacturing of light brazed assemblies, wherein said brazing sheet has good formability, combined with a low susceptibility to core penetration in the end annealed as~produced condition after stretching, forming and/or shaping and brazing, comprising the steps of a) casting an Al Mn core alloy, b) homogenization, c) cladding said core alloy with an AISi- brazing alloy, d) hot and/or cold rolling, e) recrystallization annealing, f ) strain hardening said annealed product to a second thickness with a deformation of between 10% and 40%, and g) end annealing said brazing sheet at the second thickness for 1 to 10 hours between 250~C to 420~C, such that the end annealed product is not recrystallized and the mean grain diameter provided by the recrystallization anneal is maintained at less than about 60 ~m. |
