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Journals / Politeknik Dergisi / 2025 / Cilt: 28 Sayı: 2

Effect of Double-Pulse Resistance Spot Welding on the Mechanical Properties of High Strength Low Alloy S700 Steel

Çift Aşamalı Nokta Direnç Kaynağı Uygulamasının Yüksek Dayanım Düşük Alaşımlı S700 Çeliğinin Mekanik Dayanımına Etkisinin İncelenmesi

Mehmet Okan Görtan(Hacettepe Üniversitesi)0000-0002-6095-1161
Pages
673–681
Publication Date
2025-03-27
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Additionally, in double-pulse welding applications, mechanical strengths have become more stable, and the standard deviations in measurements have decreased significantly.

📌 3 Key Takeaways

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Objective & Hypothesis:In this study, the impact of single-pulse and double-pulse resistance spot welding strategies on hot- rolled high-strength low alloy structural steel, specifically S700 with a thickness of 1.2 mm, has been examined regarding their influence on the mechanical strength and fracture characteristics of joints.
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Key Findings & Data:As a result, in double-pulse welding applications, the tensile-shear strength and fracture energy have been improved by 4.5% and 14.6%, respectively, compared to single-pulse welding.
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Conclusion & Impact:Additionally, in double-pulse welding applications, mechanical strengths have become more stable, and the standard deviations in measurements have decreased significantly.
🔬Design:Araştırma Makalesi
📍Scope:Comprehensive Sample
⚙️Variables:Nokta direnç kaynağı · S700MC çeliği · mekanik dayanım

Abstract

In this study, the impact of single-pulse and double-pulse resistance spot welding strategies on hot- rolled high-strength low alloy structural steel, specifically S700 with a thickness of 1.2 mm, has been examined regarding their influence on the mechanical strength and fracture characteristics of joints. Samples prepared using different welding currents were investigated for their tensile-shear strengths, fracture energies, fracture modes, and geometric properties of the joints. It has been determined that when double-pulse resistance spot welding is used, expulsion occurs later during the joining process, allowing for larger nugget diameters to be achieved as a result. As a result, in double-pulse welding applications, the tensile-shear strength and fracture energy have been improved by 4.5% and 14.6%, respectively, compared to single-pulse welding. Additionally, in double-pulse welding applications, mechanical strengths have become more stable, and the standard deviations in measurements have decreased significantly.

Özet

Bu çalışmada, 1,2 mm kalınlığında S700 olarak adlandırılan sıcak haddelenmiş yüksek dayanımlı düşük alaşımlı yapısal çeliğe uygulanan tek aşamalı ve çift aşamalı nokta direnç kaynağı stratejilerinin bağlantıların mekanik dayanımı ve kopma şekline etkisi incelenmiştir. Farklı kaynak akımları kullanılarak hazırlanan numunelerin çekme-makaslama dayanımları, kopma enerjileri ve kopma şekilleri ile birlikte bağlantıların geometrik özellikleri araştırılmıştır. Çift aşamalı nokta direnç kaynağı kullanılması halinde birleştirme prosesi sırasında kaynak sıçramasının daha geç gerçekleştiği ve buna bağlı olarak daha büyük çekirdek çaplarına çıkılabildiği belirlenmiştir. Sonuç olarak çift aşamalı kaynak uygulamasında çekme-makaslama dayanımı ile kopma enerjisi tek aşamalı kaynağa kıyasla sırasıyla % 4,5 ve % 14,6 oranında iyileştirilebilmiştir. Buna ek olarak çift aşamalı kaynak uygulamasında mekanik dayanımlar daha kararlı hale gelmiş ve ölçümlerdeki standart sapmalar belirgin oranda azalmıştır.

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Cite This Article

Görtan, M. O., *, M. O. G. (2025). Effect of Double-Pulse Resistance Spot Welding on the Mechanical Properties of High Strength Low Alloy S700 Steel. Politeknik Dergisi, Cilt: 28 Sayı: 2, 673–681. https://doi.org/10.2339/politeknik.1524711

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