Jan 25, 2017 · Resistance spot welding, which dominates the steel body-in-white production, involves a strong current through the metal combination that heats up and nally melts the metals at
The characteristics of dissimilar thickness dual-phase steel DP780/DP600 resistance spot welding joints have been investigated. The experimental results reveal that the weld nugget of welded joint forms as-cast structure and consists of lath martensite with little ferrite, while the heat affected zone (HAZ) near the base metal of welded joint softened. Characterization of Microstructure and Mechanical DP600 is welded to other advanced high strength steels, compared to DP600 steel. In the current research, the microstructure and mechanical properties of resistance spot welded DP600 steel was analyzed. Different microstructures of various sites were analyzed according to their thermal history during welding process.
for similar and dissimilar resistance spot welds of low carbon and DP600. It is observed that there are three distinct failure modes during tensile-shear test of dissimilar DP steel and low carbon steel- interfacial, pullout and partial thicknesspartial pullout. Contrary to general Fracture response of resistance spot welded dual phase Dec 01, 2020 · The base metal used in the present work is uncoated dual phase steel (DP600) with 1.5 mm nominal thickness. In addition to avoiding surface expulsion, this choice leads to a less abrupt change in contact resistances and contributes to greater metallurgical homogeneity of the weld point .The cold-rolled material was provided in the form of sheets of dimensions 600 × 500 mm.
Dec 01, 2017 · The resistance spot welding process has six process segments, which are preweld, squeeze, preheating, welding, holding and off. Resistance spot welding is suitable for automotive manufacturing, and is now widely used in automotive industry. The electrode geometry can change the heat transfer and solidification rate during resistance spot welding, which further affected the current density and temperature and then changed the IMC of the welding Improvement of the microstructural features and mechanical Mar 09, 2021 · The effects of the welding current mode in resistance spot welding on the microstructure and mechanical properties of advanced high-strength steel dual-phase 590 (DP590) sheets were investigated. Results showed that a rough martensitic structure was formed in the weld zone of the sample welded via the single-pulsed mode, whereas the microstructure in the heat-affected
Jul 06, 2020 · The effects of the welding current on heat input, nugget geometry, and the mechanical and fractural properties of resistance spot welding on Mg/Al dissimilar materials. Resistance spot welding of dissimilar DP600 and DC54D steels. J Mater Process Technol 2017; Mechanical properties characterization of resistance spot Resistance spot welding (RSW) is widely used in the automotive industry as the main joining method. Generally, an automotive body contains around 2000 to 5000 spot welds. Therefore, it is of decisive importance to characterize the mechanical properties of these areas for the further optimization and improvement of an automotive body structure.
May 24, 2019 · This axisymmetric displacement is largely affected by the thickness ratio of the two welded sheets than other welding parameters. Resistance spot welding of dissimilar materials such as AISI 316LDIN EN 10130-99 steels , DP600 and DC54D steels , DP600 and AISI 304 steels were investigated. Results show that the size and nugget quality in welding of dissimilar metals are significantly different from welding RESISTANCE SPOT WELDING OF ADVANCED HIGH WELDING CAMPAIGN The resistance spot welding parameters for Dual Phase steels have not yet been standardised, given that these materials are relatively new. The selection of process parameters was, hence, based on the AWS guidelines for high strength steels (HSS) that are characterised by tensile strength similar to that of DP600.
The primary aim of this investigation is to examine the resistance spot weldability of dissimilar interstitial-free (IF) and high-strength low-alloy (HSLA) steels. The effect of dynamic contact resistance on the nugget diameter is examined. The mechanical properties of the spot-welded specimens are investigated in both tensile shear and coach peel configurations. Resistance spot welding of AISI-316L SS and 2205 DSS for  A. Hasanbasoglu, R. Kaçar, Resistance spot weldability of dissimilar materials (AISI 316LDIN EN 10130-99 steels), Mater. Des. 28 (6) (2007) 17941800.  F. Hayat, The effects of the welding current on heat input, nugget geometry, and the mechanical and fractural properties of resistance spot welding on Mg/Al dissimilar materials
Aug 01, 2017 · The adequate resistance spot welding process parameters for galvannealed high strength interstitial free steel sheets of 1.6 mm thickness were estimated as 8 kA weld current, 250 ms weld time and 3.5 kN electrode force. Increase in the mean dynamic contact resistance led to a significant reduction in nugget diameter. Strength Steels Heterogeneous Spot Weldsheterogeneous AHSS welds, made of dissimilar steel grades and sheet thicknesses. Weld fractures can occur with a strength lower than expected. This study aims at understanding these fracture mechanisms and focuses on two common steel grades joined by Resistance Spot Welding (RSW):DP600 (a dual phase steel) and Usibor®1500 (a martensitic steel
Mar 30, 2021 · In automotive industries, employing advanced high-strength steels such as dual-phase steels by taking advantage of high dynamic force absorption during car accidents and lightweight is one of the major challenges. In this regard, the effect of resistance spot welding parameters on the above great properties of advanced high-strength DP590 steel has been studied.An Experimental Investigation on Comparison of the shear strength of dissimilar resistance spot welding of DP600 and DC54D steels were investigated by Yuan et al. . Effect of surface lubrication on weldability of hot dip galvanized steel sheets were studied by Spitz et al. . Dissimilar welding of different materials to galvanized steel were investigated recently - .