A Comparison of the Resistance Spot Weldability of Bare, Hot-Dipped, Galvannealed, and Electrogalvanized DQSK Sheet Steels Bethlehem Steel Corporation Steel Products Div. Research Dept

Format:

Conference/Event

Author/Creator:

Howe, Peter, author.

Conference Name:

SAE International Congress & Exposition (1988-02-29 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1988

Summary:

The spot weldability of various zinc-coated sheet steels was examined using several procedures and criteria. Current range testing indicated that increasing coating weight and average dynamic resistance widens current range. Electrode life testing showed that electrode life is affected by coating composition. In this study, the choice of the material with the widest current range was test procedure dependent. Based on one procedure, the hot-dipped galvanized sheet had the widest current range. The alternate procedure indicated that both the hot-dipped and the galvannealed materials exhibited superior current range. In general, the longest electrode lives were associated with the electrogalvanized and the galvannealed sheet, with their relative performance dependent upon the nugget diameter chosen to signify end of life. A significant amount of scatter in test results was observed which appears to be linked to electrode face variability Introduced by inconsistent electrode wear, requiring that multiple tests be conducted in order to obtain an accurate picture of the spot weldability of coated materials

Notes:

Vendor supplied data

Publisher Number:

880280

Access Restriction:

Restricted for use by site license