Joining Galvanized Steel Sheets by Resistance Spot Welding and Inspection of the Welding Zone

Arzu Altınpınar; Hakan Erdem; Mustafa Burak Telli

Makale detayları

Joining Galvanized Steel Sheets by Resistance Spot Welding and Inspection of the Welding Zone

Yazarlar:

Arzu Altınpınar | Hakan Erdem | Mustafa Burak Telli

Yayıncı:

Duzce University

Ana Başlıklar:

Mühendislik

Dergi:

Düzce Üniversitesi Bilim ve Teknoloji Dergisi Vol.12 Issue 3, pp.1479-1488

Belge Tipi:

Makale

Yayın Tarihi:

7/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001323930

pISSN:

2148-2446

Anahtar kelimeler:

Özet:

 During resistance spot welding, the welding current is the most important process parameter that determines the weld heat input and subsequently has a major impact on the weld quality. Welding is a manufacturing process used to manufacture components or parts with basic mechanical properties. Resistance spot welding in the field of metal joining; It offers practical and time-saving applications in many manufacturing industries such as automotive and white goods. In this study, the effect of resistance spot welding used in joining low carbon steel sheets, which is widely used in the automotive industry, on the mechanical and microstructure properties of the material was investigated. DX54DZ100 quality low carbon steel was used as the material to be welded. This steel sheet material was welded to appropriate standards by overlapping two steel sheets with the point resistance welding method. 6 mm diameter copper alloy electrode was used in the welding processes. Studies were carried out by keeping the electrode pressure force constant as 1 kN, welding current 6.6 kA, 7.6 kA and 8.6 kA and welding time constant 200 ms for all three samples. After the welding process was completed, the Vickers hardness test was performed on the cross-sectional surface of the material and the results were examined. In addition, the material from which the section sample was taken; The areas etched with 3 nital solution and welded in the bright field image contrast of the light microscope were examined. The crystal structure formations of the welded samples were analyzed by X-Ray diffraction XRD. Finally, a tensile test was performed to examine the effects of different welding currents on the rapture strength.As a result of the examinations, it was determined that there is an increase in grain size from the base metal to the weld core due to the increase in heat input depending on the increasing welding current intensity. At the same time, increasing heat input; It has been determined that it causes an increase in hardness, an increase in core diameter and an increase in rapture strength in the weld zone.

 During resistance spot welding, the welding current is the most important process parameter that determines the weld heat input and subsequently has a major impact on the weld quality. Welding is a manufacturing process used to manufacture components or parts with basic mechanical properties. Resistance spot welding in the field of metal joining; It offers practical and time-saving applications in many manufacturing industries such as automotive and white goods. In this study, the effect of resistance spot welding used in joining low carbon steel sheets, which is widely used in the automotive industry, on the mechanical and microstructure properties of the material was investigated. DX54DZ100 quality low carbon steel was used as the material to be welded. This steel sheet material was welded to appropriate standards by overlapping two steel sheets with the point resistance welding method. 6 mm diameter copper alloy electrode was used in the welding processes. Studies were carried out by keeping the electrode pressure force constant as 1 kN, welding current 6.6 kA, 7.6 kA and 8.6 kA and welding time constant 200 ms for all three samples. After the welding process was completed, the Vickers hardness test was performed on the cross-sectional surface of the material and the results were examined. In addition, the material from which the section sample was taken; The areas etched with 3 nital solution and welded in the bright field image contrast of the light microscope were examined. The crystal structure formations of the welded samples were analyzed by X-Ray diffraction XRD. Finally, a tensile test was performed to examine the effects of different welding currents on the rapture strength.As a result of the examinations, it was determined that there is an increase in grain size from the base metal to the weld core due to the increase in heat input depending on the increasing welding current intensity. At the same time, increasing heat input; It has been determined that it causes an increase in hardness, an increase in core diameter and an increase in rapture strength in the weld zone.

 During resistance spot welding, the welding current is the most important process parameter that determines the weld heat input and subsequently has a major impact on the weld quality. Welding is a manufacturing process used to manufacture components or parts with basic mechanical properties. Resistance spot welding in the field of metal joining; It offers practical and time-saving applications in many manufacturing industries such as automotive and white goods. In this study, the effect of resistance spot welding used in joining low carbon steel sheets, which is widely used in the automotive industry, on the mechanical and microstructure properties of the material was investigated. DX54DZ100 quality low carbon steel was used as the material to be welded. This steel sheet material was welded to appropriate standards by overlapping two steel sheets with the point resistance welding method. 6 mm diameter copper alloy electrode was used in the welding processes. Studies were carried out by keeping the electrode pressure force constant as 1 kN, welding current 6.6 kA, 7.6 kA and 8.6 kA and welding time constant 200 ms for all three samples. After the welding process was completed, the Vickers hardness test was performed on the cross-sectional surface of the material and the results were examined. In addition, the material from which the section sample was taken; The areas etched with 3 nital solution and welded in the bright field image contrast of the light microscope were examined. The crystal structure formations of the welded samples were analyzed by X-Ray diffraction XRD. Finally, a tensile test was performed to examine the effects of different welding currents on the rapture strength.As a result of the examinations, it was determined that there is an increase in grain size from the base metal to the weld core due to the increase in heat input depending on the increasing welding current intensity. At the same time, increasing heat input; It has been determined that it causes an increase in hardness, an increase in core diameter and an increase in rapture strength in the weld zone.

 Kaynak, temel mekanik özelliklere sahip bileşenlerin veya parçaların üretimi için kullanılan bir imalat sürecidir. Metallerinin birleştirilmesi alanında nokta direnç kaynağı; otomotiv ve beyaz eşya gibi birçok imalat sanayide pratik ve zaman kazandıran uygulamalar sunmaktadır. Nokta direnç kaynağı sırasında kaynak akımı, kaynak ısı girişini belirleyen ve ardından kaynak kalitesi üzerinde büyük etkisi olan en önemli proses parametresidir. Bu çalışmada, otomotiv sektöründe kullanımı oldukça yaygın olan düşük karbonlu çelik sacların birleştirilmesinde kullanılan nokta direnç kaynağının malzemenin mekanik ve mikro yapı özelliklerine olan etkisi incelenmiştir. Kaynak yapılan malzeme olarak DX54DZ100 kalite düşük karbonlu çelik kullanılmıştır. Birleştirme işlemlerinde 6 mm çaplı bakır alaşımı elektrot kullanılmıştır. Kaynak parametrelerinden elektrot baskı kuvveti 1 kN olarak sabit tutularak, kaynak akımı 6,6 kA, 7,6 kA ve 8,6 kA ve kaynak zamanı her üç numune için 200 ms sabit tutularak çalışmalar yapılmıştır. Kaynak işlemi tamamlandıktan sonra, malzemenin kesit yüzeyinde Vickers sertlik testi yapılmıştır. Ayrıca kesit numunesi alınmış malzeme; 3 lük nital çözeltisi ile dağlanıp ve ışık mikroskobunun aydınlık alan görüntü kontrastında kaynak yapılmış bölgeler incelenmiştir. Kaynaklanan numunelerin kristal yapı oluşumları X - Işınları difraksiyonu XRD ile analiz edilmiştir. Son olarak farklı kaynak akımlarının kopma mukavemetine etkilerini incelemek üzere çekme-makaslama testi yapılmıştır. Yapılan incelemeler sonucunda, artan kaynak akım şiddetine bağlı olarak ısı girdisinin artması sebebiyle esas metalden kaynak çekirdeğine doğru tane boyutlarında artış olduğu belirlenmiştir. Artan ısı girdisinin aynı zamanda; kaynak bölgesinde sertlik artışına, çekirdek çapının artışına ve kopma mukavemeti artışına neden olduğu belirlenmiştir.

Makale detayları

Joining Galvanized Steel Sheets by Resistance Spot Welding and Inspection of the Welding Zone

Yazarlar:

Arzu Altınpınar | Hakan Erdem | Mustafa Burak Telli

Yayıncı:

Duzce University

Ana Başlıklar:

Mühendislik

Dergi:

Düzce Üniversitesi Bilim ve Teknoloji Dergisi Vol.12 Issue 3, pp.1479-1488

Belge Tipi:

Makale

Yayın Tarihi:

7/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001323930

pISSN:

2148-2446

Resistance Spot Welding

Galvanized Steel

Welding Current

AutomotivDirenç Nokta Kaynağı

Galvaniz kaplı Çelik,

Kaynak Akımı

Otomotiv

Resistance Spot Welding

Galvanized Steel

Welding Current

Automotiv

Sayı

Makale detayları

Yazarlar: Arzu Altınpınar | Hakan Erdem | Mustafa Burak Telli

Yayıncı: Duzce University

Ana Başlıklar: Mühendislik

Dergi: Düzce Üniversitesi Bilim ve Teknoloji Dergisi Vol.12 Issue 3, pp.1479-1488

Belge Tipi: Makale

Yayın Tarihi: 7/2024

Belge Dili: Türkçe

Document ID (Org No.): 2001323930

pISSN: 2148-2446

Sayı

Yazarlar:

Arzu Altınpınar | Hakan Erdem | Mustafa Burak Telli

Yayıncı:

Duzce University

Ana Başlıklar:

Mühendislik

Dergi:

Düzce Üniversitesi Bilim ve Teknoloji Dergisi Vol.12 Issue 3, pp.1479-1488

Belge Tipi:

Makale

Yayın Tarihi:

7/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001323930

pISSN:

2148-2446