公开(公告)号：US20180073118A1

公开(公告)日：2018-03-15

申请号：US15558205

申请日：2016-03-10

Applicant: UACJ Corporation

Inventor： Wataru NAKAGAWA ,  Satoshi TANAKA ,  Kazuko TERAYAMA

IPC: C22F1/043 ,  C22C21/00 ,  C22C21/04 ,  F28F19/06

CPC classification number: C22F1/043 ,  B23K35/0238 ,  B23K35/28 ,  B23K35/286 ,  B23K35/288 ,  B23K2101/14 ,  B23K2103/10 ,  B32B15/16 ,  B32B15/20 ,  B60H1/3227 ,  C22C21/00 ,  C22C21/04 ,  C22F1/04 ,  F28F1/126 ,  F28F19/06 ,  F28F21/084 ,  F28F21/089 ,  F28F2275/04

Abstract: The aluminium-alloy brazing sheet fin material having a core material and a brazing material. Before heating for brazing, the fin material has an average degree of cladding of 6 to 16% for each surface, a thickness of 40 to 120 μm and an electrical conductivity of 48 to 54% IACS and the core material has a metallographic structure having a distribution in which a Mn-based compound having an equivalent circular diameter of 0.05 to 0.50 μm is present at an average distance between particles of 0.05 to 0.35 μm. After heating for brazing, the fin material has an electrical conductivity of 40 to 44% IACS and the core material has a metallographic structure having a distribution in which a Mn-based compound having an equivalent circular diameter of 0.50 μm or less is present at an average distance between particles of 0.45 μm or less.

公开(公告)号：US20180363995A1

公开(公告)日：2018-12-20

申请号：US16110271

申请日：2018-08-23

Applicant: UACJ CORPORATION

Inventor： Wataru NAKAGAWA ,  Satoshi TANAKA

IPC: F28F21/08 ,  B21B1/22 ,  B23K35/28 ,  C22C21/02 ,  C22C21/10

Abstract: Provided are an aluminum alloy brazing sheet for heat exchangers, which exhibits excellent formability and brazeability, and an advantageous process for producing the same. The aluminum alloy brazing sheet for heat exchangers according to the present invention is configured such that: the aluminum alloy composition of a core material and the aluminum alloy composition and temper of a filler material are respectively controlled; and a core material portion of the brazing sheet has a specific electric resistivity at room temperature and a specific dispersion ratio of second phase particles. The brazing sheet is configured to further exhibit certain properties in terms of a work hardening exponent (n-value) where a nominal strain is within a range of 1%-2% and in terms of a push-in depth when a penetration crack is generated in a punch stretch forming test using a round-head punch having a diameter of 50 mm.