Used for high-strength automotive heat exchanger fin stock produced by brazing, moldability and erosion resistance excellent automotive heat exchanger fin material for high-strength aluminum alloy material, and a manufacturing method thereof

摘要

PROBLEM TO BE SOLVED: To provide a high-strength aluminum alloy material for automobile heat-exchanger excellent in formability and erosion resistance, and to provide a method for production of the same.;SOLUTION: The aluminum alloy material contains, by mass, 0.3-1.2% Si, 0.7-2.0% Fe, 0.2-0.8% Mn and 0.1-1.0% Zn. The material before brazing has characteristics such that the proportion of fibrous texture in its structure is ≥90% or ≤10%, the electric conductivity is 43-53%, and the number of dispersed particles having the circle-equivalent diameter of 0.1-5 μm is 3×10²-5×10⁴ pieces/mm² on the surface of the alloy material. Besides, the material after brazing has such characteristics that its texture is made in a recrystallization state, the electric conductivity is 45-55%, and the number of the above dispersed particles is 3×10³-5×10⁵ pieces/mm² on the material surface.;COPYRIGHT: (C)2009,JPO&INPIT