New possibilities for resistance spot welding

• Published in: Welding international 2002-01, Vol.16 (3), p.231-233
• Main Authors: Kolosov, V I, Gorelikov, P A, Musin, R A
• Format: Article
• Language: English
• ISSN: 0950-7116; 1754-2138
• DOI: 10.1080/09507110209549523

The technological possibilities for the process of resistance spot welding are quite extensive. Already at present, modern equipment can be used for efficient production of high-quality welded joints in different metals in a wide range of thicknesses. For example, it is not difficult to weld carbon, stainless and creep-resisting steels with a thickness of 0.5-5.0 mm, aluminium alloys 0.5-7.0 mm thick, titanium alloys 0.5-5.0 mm thick; welding of certain dissimilar metals is also possible; it is possible to produce high-quality joints in components of different thicknesses at the ratio of the thickness not exceeding 1:3, etc. The experiments into the relationships of formation of temperature fields were carried out in a DC machine of the MTV-3501 type. The range of the welding current started with the values resulting in stable formation of a cast nugget and in 1 kA steps up to the values resulting in splashing. The main bulk of the investigations were carried out on sheets of 12Cr18Ni10Ti steel, thickness 2.5 + 2.5 mm; 1.5 + 5.0 mm, and on single sheets with a thickness of 5.5 mm. This resulted in the formation of a stage-by-stage pattern of formation of localised heating zones up to the formation of the cast nugget in the conditions of sharply non-stationary heating typical of resistance spot welding.