RESISTANCE SPOT WELDING CHARACTERIZATION OF PRESS HARDENED STEEL
RESISTANCE SPOT WELDING CHARACTERIZATION OF PRESS HARDENED STEEL
In the automotive industry the resistance spot welding (RSW) is one of the most used processes for joining steel sheets, being of fundamental importance the quality assurance of this process.In this work, 22MnB5 steel sheets for the hot stamping process, also known as PHS (Press Hardening Steel), were joined by the technique of resistance spot welding, so that the welding parameters were changed 16 times for the evaluation of the influence of these parameters on the mechanical properties.By conducting ultrasonic, tensile and hardness test, followed by metallography, it was possible to identify the characteristics of the spot weld effect on the material.The results of the tests performed in this work confirmed the difference in mechanical strength of the thermal zone (ZTA) in relation to the molten zone (ZF) .For a certain set of the parameters it was shown a decrease in the strength of the ZTA and increasing to the weld point, which is demonstrated in the microstructural analysis and thus justifies the detachment of the weld button of the base material during tensile testing, i.e., there was a higher strength in the welded area.
In the automotive industry the resistance spot welding (RSW) is one of the most used processes for joining steel sheets, being of fundamental importance the quality assurance of this process.In this work, 22MnB5 steel sheets for the hot stamping process, also known as PHS (Press Hardening Steel), were joined by the technique of resistance spot welding, so that the welding parameters were changed 16 times for the evaluation of the influence of these parameters on the mechanical properties.By conducting ultrasonic, tensile and hardness test, followed by metallography, it was possible to identify the characteristics of the spot weld effect on the material.The results of the tests performed in this work confirmed the difference in mechanical strength of the thermal zone (ZTA) in relation to the molten zone (ZF) .For a certain set of the parameters it was shown a decrease in the strength of the ZTA and increasing to the weld point, which is demonstrated in the microstructural analysis and thus justifies the detachment of the weld button of the base material during tensile testing, i.e., there was a higher strength in the welded area.
In the automotive industry the resistance spot welding (RSW) is one of the most used processes for joining steel sheets, being of fundamental importance the quality assurance of this process.In this work, 22MnB5 steel sheets for the hot stamping process, also known as PHS (Press Hardening Steel), were joined by the technique of resistance spot welding, so that the welding parameters were changed 16 times for the evaluation of the influence of these parameters on the mechanical properties.By conducting ultrasonic, tensile and hardness test, followed by metallography, it was possible to identify the characteristics of the spot weld effect on the material.The results of the tests performed in this work confirmed the difference in mechanical strength of the thermal zone (ZTA) in relation to the molten zone (ZF).For a certain set of the parameters it was shown a decrease in the strength of the ZTA and increasing to the weld point, which is demonstrated in the microstructural analysis and thus justifies the detachment of the weld button of the base material during tensile testing, i.e., there was a higher strength in the welded area.
In the automotive industry the resistance spot welding (RSW) is one of the most used processes for joining steel sheets, being of fundamental importance the quality assurance of this process.In this work, 22MnB5 steel sheets for the hot stamping process, also known as PHS (Press Hardening Steel), were joined by the technique of resistance spot welding, so that the welding parameters were changed 16 times for the evaluation of the influence of these parameters on the mechanical properties.By conducting ultrasonic, tensile and hardness test, followed by metallography, it was possible to identify the characteristics of the spot weld effect on the material.The results of the tests performed in this work confirmed the difference in mechanical strength of the thermal zone (ZTA) in relation to the molten zone (ZF).For a certain set of the parameters it was shown a decrease in the strength of the ZTA and increasing to the weld point, which is demonstrated in the microstructural analysis and thus justifies the detachment of the weld button of the base material during tensile testing, i.e., there was a higher strength in the welded area.
في صناعة السيارات، يعد اللحام البقعي المقاوم (RSW) أحد أكثر العمليات استخدامًا لربط صفائح الصلب، نظرًا لأهميته الأساسية في ضمان جودة هذه العملية. في هذا العمل، تم ضم صفائح الصلب 22MnB5 لعملية الختم الساخن، والمعروفة أيضًا باسم PHS (فولاذ التصلب بالضغط)، بواسطة تقنية اللحام البقعي المقاوم، بحيث تم تغيير معلمات اللحام 16 مرة لتقييم تأثير هذه المعلمات على الخواص الميكانيكية. من خلال إجراء اختبار الموجات فوق الصوتية والشد والصلابة، تليها علم المعادن، كان من الممكن تحديد خصائص تأثير اللحام الموضعي على المادة. أكدت نتائج الاختبارات التي أجريت في هذا العمل الفرق في القوة الميكانيكية للمنطقة الحرارية (ZTA) فيما يتعلق بالمنطقة المنصهرة (ZF). بالنسبة لمجموعة معينة من المعلمات، تم عرض انخفاض في قوة ZTA وزيادة إلى نقطة اللحام، وهو ما يتضح في التحليل الهيكلي الدقيق وبالتالي يبرر انفصال زر اللحام للقاعدة أثناء اختبار الشد، أي أنه كانت هناك قوة أعلى في المنطقة الملحومة.
Composite material, Metal Matrix Composites: Science and Applications, Work hardening, Friction Stir Welding, FOS: Mechanical engineering, Layer (electronics), Advances in Friction Stir Welding and Processing, Engineering, Heat-affected zone, Electric resistance welding, Welding, Microstructure, Spot welding, Hardening (computing), Mechanical Engineering, Hot stamping, Friction Stir Processing, Materials science, Indentation hardness, Mechanics of Materials, Ultimate tensile strength, Physical Sciences, Metallurgy, Metallography, Mechanical Properties of Thin Film Coatings, Tensile testing
Composite material, Metal Matrix Composites: Science and Applications, Work hardening, Friction Stir Welding, FOS: Mechanical engineering, Layer (electronics), Advances in Friction Stir Welding and Processing, Engineering, Heat-affected zone, Electric resistance welding, Welding, Microstructure, Spot welding, Hardening (computing), Mechanical Engineering, Hot stamping, Friction Stir Processing, Materials science, Indentation hardness, Mechanics of Materials, Ultimate tensile strength, Physical Sciences, Metallurgy, Metallography, Mechanical Properties of Thin Film Coatings, Tensile testing
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