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引用次数: 0
摘要
本文研究了焊接电流和夹紧力对1.8 mm厚DOCOL 1200M钢点焊接头性能的影响。由于DOCOL 1200M马氏体组织钢在变形力作用下会硬化，因此用于制造吸能器或汽车头板。试验接头采用机器人焊接台制作，进行宏观和微观金相测试、硬度测量和强度测试。根据PN-EN ISO 14273:2016进行强度验证。试验表明，过高的夹紧力和相对较低的焊接电流不能保证获得符合要求强度的接头。然而，通过增加焊接电流和减小夹紧力可以提高焊接接头的强度。使用适当的点电阻焊接参数，可以在DOCOL 1200M钢中制造具有令人满意强度水平的接头
The Effect of Selected Spot Resistance Welding Parameters on Properties of Martensite-Structured AHSS
: The paper presents the effect of welding current and clamping force on the properties of spot resistance-welded joints made of 1.8 mm thick steel DOCOL 1200M. Because of the fact that martensite-structured steel DOCOL 1200M is hardened when exposed to deforming force, it is used to make energy absorbers or car header panels. Test joints, made using a robotic welding station, were subjected to macro and microscopic metallographic tests, hardness measurements and strength tests. The obtained test joints were subjected to strength verification performed in accordance with PN-EN ISO 14273:2016. The tests demonstrat-ed that excessively high clamping force combined with relatively low welding current do not guarantee the obtainment of a joint characterised by required strength. However, by increasing welding current and reducing clamping force it is possible to increase the strength of welded joints. The use of appropriate spot resistance welding parameters enables the making of joints in steel DOCOL 1200M steel characterised by a satisfactory level of strength
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