Abstract
A new approach to estimating the quality of joints made by contact spot welding and arc welding is proposed on the basis of studies on the interaction of thermal and electromagnetic fields during welding of St3 steel. Parts welded by contact spot welding are magnetized by a solenoid immediately after the welding current is switched off. The diameter of the cast nugget is estimated from the change in the normal component of residual induction in the center of the contact spot of an electrode. The parts to be arc-welded are magnetized before welding. The fusion depth is estimated from the size of the demagnetization band adjacent to the weld.
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REFERENCES
Nerazrushayushchii kontrol' (Nondestructive Testing), 5 vols., vol. 3: Gerasimov, V.G., Pokrovskii, A.D., and Sukhorukov, V.V., Elektromagnitnyi kontrol' (Electromagnetic Testing), Sukhorukov, V.V., ed., Moscow: Vysshaya Shkola, 1992.
Sharova, A.M., Kontrol' kachestva svarki magnitograficheskim metodom (Testing of Welding Quality by the Mag-netographic Method), Minsk: Vysshaya Shkola, 1979.
Belarus Republic Patent, Application no. a19980950, 1998.
Mel'gui, M.A., Magnitnyi kontrol' mekhanicheskikh svoistv stalei (Magnetic Testing of Mechanical Properties of Steels), Minsk: Nauka i Tekhnika, 1980.
Livshits, B.G., Fizicheskie svoistva metallov i splavov (Physical Properties of Metals and Alloys), Moscow, 1956.
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Kulikov, V.P., Bolotov, S.V. Magnetic Thermal Method for Controlling Geometric Characteristics of Fusion Joints by Contact and Arc Welding. Russian Journal of Nondestructive Testing 40, 273–282 (2004). https://doi.org/10.1023/B:RUNT.0000043678.97701.ff
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DOI: https://doi.org/10.1023/B:RUNT.0000043678.97701.ff