Method of determining the weldability of a part

Details Method of determining the weldability of a part Method of determining the weldability of a part

1987-10-05

1989-08-22

Shaw, Clifford C.

Electric heating

Metal heating

By arc

21913021, 219137PS, B23K 923

Patent

active

048598305

ABSTRACT:
The weldability of a part formed from an alloy having low impurity concentrations is determined by initiating an arc between a stationary welding torch and the part using a predetermined set of welding parameters selected to produce a partially penetrating molten weld pool. The natural frequency of oscillation of the molten weld pool is measured a predetermined time following initiation of the arc, and the measured natural frequency of oscillation is compared to empirically determined data for the alloy to determine the weldability of the particular part. Variations in trace element concentrations between different heats of the same alloy affect the three-dimensional geometry of the molten weld pool, and in turn affect its resonant frequency. The invention may be used to adjust the welding parameters to accommodate differences in weldability between different heats of the same alloy.

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