公开(公告)号：US20190162492A1

公开(公告)日：2019-05-30

申请号：US16091776

申请日：2017-04-12

Applicant: UACJ Corporation

Inventor： Tomohito KUROSAKI ,  Junji NINOMIYA ,  Yoshihiko MIZUTA ,  Ryoko FUJIMURA

IPC: F28F21/08 ,  F28F19/00

Abstract: An aluminum alloy fin material includes an aluminum alloy containing 1.50 to 5.00 mass % Si with the balance of Al and inevitable impurities, and has the function of being bonded by heating with a single layer. Assuming that in a cross section along the thickness direction of the fin material, the equivalent circle diameter of a Si particle is represented by D, a distance from a surface layer to the center of the Si particle is represented by L, the thickness of the fin material is represented by t, and a length parallel to the surface layer is represented by W, all Si particles that are present in the range of the length W and satisfy D≥L and L+D>0.04 t also satisfy 0≤ΣπD2