| 摘要 |
<p>A consumable brazing sleeve comprising metal includes a ceramic flux band formed on the sleeve adjacent an annular recess typically disposed near an open end of the sleeve for receiving a conventional braze preform; the braze preform may be formed by adhering a desired powder flux to the sleeve by a tacky adhesive and then melting the powder flux into place, by internal heating of the tube. The ceramic flux band is hard and adherent, and resistant to abrasion effects during insertion of the sleeve into a tube, and provides a shadow effect for protecting an optional cemented powder flux band which may be formed on the braze ring.</p> |
