Quality Control of Resistance Spot Welding of High Strength Steels

Neugebauer, Reimund; Wiener, Thomas; Zösch, Antje

doi:10.1016/j.procir.2013.09.025

Cited by 9 publications

(3 citation statements)

References 1 publication

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“…In the conditions of 5 kA, the appearance of expulsion of material from the nugget caused abrupt changes in the shape of the wave (Fig. 6a), with wave shapes similar to those obtained by Neugebauer et al 20 The incidence of the polarity in the behaviour of the dynamic resistance shown in Fig. 6a is in total correspondence with the results shown previously.…”

Section: Resultssupporting

confidence: 88%

Influence of polarity on mechanical properties of dissimilar resistance spot welds of DP 600/AISI 304 steels

Hernández

Roca

Fals

et al. 2016

Science and Technology of Welding and Joining

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The influence of polarity during resistance spot weld (RSW) of dissimilar lap joints on mechanical properties and failure mode is assessed in this work. A dissimilar lap joint was set using DP 600 dual phase steel with AISI 304 stainless steel. The experiments were performed on a mediumfrequency direct current spot welding machine with proper data acquisition of voltage and welding current. Temperature evolution was also acquired by using IR camera. The mechanical properties of spot welds were evaluated by using a coach peel testing. The effect of welding current and welding time on mechanical properties was also evaluated. Correlations between polarity with the welding nugget size, failure mode, tensile strength, temperature evolution and dynamic resistance were analysed. The analysis confirmed that the polarity on dissimilar lap joints affects the behaviour of dissimilar RSWs.

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Section: Resultssupporting

confidence: 88%

Influence of polarity on mechanical properties of dissimilar resistance spot welds of DP 600/AISI 304 steels

Hernández

Roca

Fals

et al. 2016

Science and Technology of Welding and Joining

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“…In the case of Resistance Spot Welding (RSW), the strength of the welds is mainly defined by the size and quality of the weld nuggets. It was shown that 3MA allows for the size of the weld nugget to be accurately determined [69]. If the PHS should be laser welded, the aluminum-silicon coating could be a problem.…”

Section: Car Body Partsmentioning

confidence: 99%

Nondestructive Testing with 3MA—An Overview of Principles and Applications

2019

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More than three decades ago, at Fraunhofer IZFP, research activities that were related to the application of micromagnetic methods for nondestructive testing (NDT) of the microstructure and the properties of ferrous materials commenced. Soon, it was observed that it is beneficial to combine the measuring information from several micromagnetic methods and measuring parameters. This was the birth of 3MA-the micromagnetic multi-parametric microstructure and stress analysis. Since then, 3MA has undergone a remarkable development. It has proven to be one of the most valuable testing techniques for the nondestructive characterization of metallic materials. Nowadays, 3MA is well accepted in industrial production and material research. Over the years, several equipment variants and a wide range of probe heads have been developed, ranging from magnetic microscopes with µm resolution up to large inspection systems for in-line strip steel inspection. 3MA is extremely versatile, as proved by a huge amount of reported applications, such as the quantitative determination of hardness, hardening depth, residual stress, and other material parameters. Today, specialized 3MA systems are available for manual or automated testing of various materials, semi-finished goods, and final products that are made of steel, cast iron, or other ferromagnetic materials. This paper will provide an overview of the historical development, the basic principles, and the main applications of 3MA.

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“…According to statistics, there are at least 20 spot welding of multilayer boards in the frame alone [1]. In three-layer sheets resistance spot welding, compared with the conventional two-layer sheets, quality problems such as too small welding spot diameter, virtual welding, missing welding, surface crack and deep welding indentation are more likely to occur, which seriously affect the quality of automobile manufacturing [2][3][4]. At present, for the spot welding quality problem of three-layer sheets, post-welding treatment is generally adopted, which affects the production efficiency of automobile and the surface quality of spot welding.…”

Section: Introductionmentioning

confidence: 99%

Research on quality inspection model of spot welding of equal-thickness three-layer sheets based on ultrasonic A-scan

Liu¹,

Pan²,

Chen³

et al. 2022

J. Phys.: Conf. Ser.

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To judge the spot welding quality automatically and effectively, this thesis uses the conventional ultrasonic A-scanning to study the mathematical model of nugget diameter for equal-thickness three-layer sheets. The finite element simulation model of the spot welding ultrasonic nondestructive (NDT) testing for equal-thickness three-layer low carbon sheets is established. The calculated values of the nugget diameter between different laminates are studied. Finally, the experiment of the spot welding ultrasonic nondestructive testing is carried out. This thesis verifies the correctness of the finite element simulation and the mathematical calculation model. The research results are of great significance to ultrasonic automatic inspection technology of spot welding.

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Quality Control of Resistance Spot Welding of High Strength Steels

Cited by 9 publications

References 1 publication

Influence of polarity on mechanical properties of dissimilar resistance spot welds of DP 600/AISI 304 steels

Influence of polarity on mechanical properties of dissimilar resistance spot welds of DP 600/AISI 304 steels

Nondestructive Testing with 3MA—An Overview of Principles and Applications

Research on quality inspection model of spot welding of equal-thickness three-layer sheets based on ultrasonic A-scan

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