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

Mehmet Okan Görtan

Makale detayları

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

Yazarlar:

Mehmet Okan Görtan

Yayıncı:

Gazi University

Ana Başlıklar:

Malzeme Karekterizasyonu | İmalat Süreçleri ve Teknolojileri

Dergi:

Politeknik Dergisi Vol.28 Issue 2, pp.673-681

Belge Tipi:

Makale

Yayın Tarihi:

3/2025

Belge Dili:

Türkçe

Document ID (Org No.):

2001344350

pISSN:

2147-9429

Anahtar kelimeler:

Özet:

 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.

 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.

 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.

 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.

Makale detayları

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

Yazarlar:

Mehmet Okan Görtan

Yayıncı:

Gazi University

Ana Başlıklar:

Malzeme Karekterizasyonu | İmalat Süreçleri ve Teknolojileri

Dergi:

Politeknik Dergisi Vol.28 Issue 2, pp.673-681

Belge Tipi:

Makale

Yayın Tarihi:

3/2025

Belge Dili:

Türkçe

Document ID (Org No.):

2001344350

pISSN:

2147-9429

Resistance spot welding

S700MC steel

mechanical strengthNokta direnç kaynağı

S700MC çeliği

mekanik dayanım

Sayı

Makale detayları

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

Yazarlar: Mehmet Okan Görtan

Yayıncı: Gazi University

Ana Başlıklar: Malzeme Karekterizasyonu | İmalat Süreçleri ve Teknolojileri

Dergi: Politeknik Dergisi Vol.28 Issue 2, pp.673-681

Belge Tipi: Makale

Yayın Tarihi: 3/2025

Belge Dili: Türkçe

Document ID (Org No.): 2001344350

pISSN: 2147-9429

Resistance spot welding

S700MC steel

mechanical strengthNokta direnç kaynağı

S700MC çeliği

mekanik dayanım

Sayı

Yazarlar:

Mehmet Okan Görtan

Yayıncı:

Gazi University

Ana Başlıklar:

Malzeme Karekterizasyonu | İmalat Süreçleri ve Teknolojileri

Dergi:

Politeknik Dergisi Vol.28 Issue 2, pp.673-681

Belge Tipi:

Makale

Yayın Tarihi:

3/2025

Belge Dili:

Türkçe

Document ID (Org No.):

2001344350

pISSN:

2147-9429