Formability of Laser Welding Plates of Dissimilar Materials

2nd International Conference on Sustainable Engineering Techniques

工业技术（总论）

Abd Alwahed, Zahraa Thamer^1 ; Jadee, Khudhayer J.^1 ; Ameen, Hani Aziz^1

Technical Engineering College, Middle Technical University, Baghdad, Iraq^1

关键词: Butt joints;    Deep-drawing process;    Friction coefficients;    High mechanical properties;    Hydroforming process;    hydropunch;    Mechanical characteristics;    Strain distributions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/518/3/032060/pdf
DOI  :  10.1088/1757-899X/518/3/032060

学科分类：工业工程学

来源: IOP

【 摘 要 】

Hydraulic deformation is a procedure utilized for forming sheet by applying the pressure driven pressurized fluid on the sheet. This procedure is described by its capacity to give homogenous strain distribution along the blank with high mechanical properties. The analysis of the sample deformation process has performed by using circular welded plate by laser technique of dissimilar steel plate (SS304-St1008) with thickness 1mm using profile radius for lower die 2 mm under the effect of blank holder force 10 kN. The metal thickness checked and the SEM test investigated for the formability product of laser welded plate. Discoveries show that by and large better mechanical characteristics, for example, formability, tensile and yield strength of welded joints can be achieved by using laser welding and the blank deformation becomes uniform with the hydraulic force. It is useful to avoid thinning of the blank with suitable friction coefficient between the die and the blank. Based on the experimental results of dissimilar metal, it found, that the joint weld strength parts, was lesser than the base strength, so the fracture is occur on the base metal. The SEM investigation indicated that the joining process between the SS304 and St1008 was occurred by heating due to laser on the other hand the depth of the interface between the joint materials had the range of 3-5 μm. The EDS examination indicated that the interface zone of the jointed contained Cr, Ni, C and Fe, the left side is SS304 passing through the region zone and ending with St1008, the ratio of Fe increased and the other elements decreased.