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Effect of Steel Grades on Technological Properties of Spot Welds

Marcin Korzeniowski, Beata Białobrzeska, Martyna Maciejewska

Because of varying mechanical properties, (e.g. yield point, tensile strength), electric (e.g. electric conductance) and a heat conductivity coefficient, the use of the same welding process parameters leads to the formation of welds having various diameters depending on steels grades subjected to welding [1]. The article describes the effect of typical steels used in the automotive industry (e.g. DC 01, DP 600, DP 800) on the weld diameter, i.e. the primary technological parameter of a welded joint. To ensure process repeatability, welded joints were made using a robotic welding station. Afterwards, weld diameters were measured using destructive tests (technological peeling tests and metallographic examination) and non-destructive tests, i.e. ultrasonic tests performed using an RSWA machine provided with a phased-array transducer and acoustic scanning microscopy.

doi: 10.17729/ebis.2017.5/8

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