Alcoa Inc.

Ford Motor Company Limited

John B Eye

Raymond J Kilmer

Stephen F Baumann

Michael P Danz

Matthew John Zaluzec

Henry Mehraban

Timothy Van Evans

Gerry A Grab

Stacy Y Uyeda

Ronald P Burt

A wrought aluminum sheet product having a textured surface for improved heat transfer properties. A plurality of textured features having dimensions of about 1-50 microns is roll textured onto one or both sides of the sheet. The aluminum sheet may be used as the fins or tubing of a heat exchanger.

Micro-textured heat transfer surfaces

The present invention is directed to a means for the surface preparation of a metal or metal alloy substrate. In the process of the present invention, a stream of a mixture of flux particles and metal particles is hurled at the substrate at velocities effective for flux adhesion to the surface. The velocities of the particle stream is adjusted so that the flux particles adhere to the surface and the metal particles bounce off the surface. At higher temperatures and velocities, the metal particles are co-deposited with the flux.

Method of depositing flux or flux and metal onto a metal brazing substrate

A method is disclosed of making a braze sheet for a brazed assembly. The method includes the steps of providing a sheet of a core material and a composition cladding and mechanically embedding a flux into the sheet.

Method of making a braze sheet

Growing community of inventors

Lancaster, PA, United States of America

John B Eye