Investigation of the weldability of AISI 430 and HARDOX 500 steels by CMT method

Mustafa Engin Kocadağistan

Makale detayları

Investigation of the weldability of AISI 430 and HARDOX 500 steels by CMT method

Yazarlar:

Mustafa Engin Kocadağistan

Yayıncı:

Pamukkale University

Ana Başlıklar:

Makine Mühendisliği (Diğer)

Dergi:

Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi Vol.30 Issue 3, pp.293-301

Belge Tipi:

Makale

Yayın Tarihi:

6/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001320570

pISSN:

2147-5881

Anahtar kelimeler:

Özet:

 In this study, AISI-430 and HARDOX 500 steels were welded with Cold Metal Transfer CMT welding technique, and the changes in the mechanical properties in the welding and HAZ Heat Affected Zone regions were investigated. 100x130x6 mm AISI 430 and HARDOX 500 steels were cut in standard sizes with a band saw and joined by the CMT method using AWS 307 additional wire. The mechanical properties and microstructural changes of the welded areas were investigated by various analyses, microhardness, notch impact, and tensile tests, and the ruptured surfaces of the test specimens after the tensile test were investigated by SEM analysis. Welding was carried out at 140 A, 130 A, and 120 A current. 97.5 Argon and 2.5 CO2 gas were used as shielding gas. It has been determined that there are differences in morphology from the optical images after welding. Coarse grains were formed in the HAZ regions but were limited to the low-temperature input of the CMT welding. According to the EDS analysis results, it has been determined that there are atomic transitions between the regions. In the hardness analysis, there was a slight decrease in hardness in the HAZ regions compared to the base metals. In the tensile test, all 3 samples broke from the AISI 430 main material part. Elongation amounts were measured between 16.81 and 17.90 mm, and tensile strengths were measured between 417 and 441 MPa. As a result of the study, it has been revealed that the mechanical properties of AISI 430 and HARDOX 500 steels combined with CMT Welding have increased significantly in the weld zone and weldability is possible.

 In this study, AISI-430 and HARDOX 500 steels were welded with Cold Metal Transfer CMT welding technique, and the changes in the mechanical properties in the welding and HAZ Heat Affected Zone regions were investigated. 100x130x6 mm AISI 430 and HARDOX 500 steels were cut in standard sizes with a band saw and joined by the CMT method using AWS 307 additional wire. The mechanical properties and microstructural changes of the welded areas were investigated by various analyses, microhardness, notch impact, and tensile tests, and the ruptured surfaces of the test specimens after the tensile test were investigated by SEM analysis. Welding was carried out at 140 A, 130 A, and 120 A current. 97.5 Argon and 2.5 CO2 gas were used as shielding gas. It has been determined that there are differences in morphology from the optical images after welding. Coarse grains were formed in the HAZ regions but were limited to the low-temperature input of the CMT welding. According to the EDS analysis results, it has been determined that there are atomic transitions between the regions. In the hardness analysis, there was a slight decrease in hardness in the HAZ regions compared to the base metals. In the tensile test, all 3 samples broke from the AISI 430 main material part. Elongation amounts were measured between 16.81 and 17.90 mm, and tensile strengths were measured between 417 and 441 MPa. As a result of the study, it has been revealed that the mechanical properties of AISI 430 and HARDOX 500 steels combined with CMT Welding have increased significantly in the weld zone and weldability is possible.

 In this study, AISI-430 and HARDOX 500 steels were welded with Cold Metal Transfer CMT welding technique, and the changes in the mechanical properties in the welding and HAZ Heat Affected Zone regions were investigated. 100x130x6 mm AISI 430 and HARDOX 500 steels were cut in standard sizes with a band saw and joined by the CMT method using AWS 307 additional wire. The mechanical properties and microstructural changes of the welded areas were investigated by various analyses, microhardness, notch impact, and tensile tests, and the ruptured surfaces of the test specimens after the tensile test were investigated by SEM analysis. Welding was carried out at 140 A, 130 A, and 120 A current. 97.5 Argon and 2.5 CO2 gas were used as shielding gas. It has been determined that there are differences in morphology from the optical images after welding. Coarse grains were formed in the HAZ regions but were limited to the low-temperature input of the CMT welding. According to the EDS analysis results, it has been determined that there are atomic transitions between the regions. In the hardness analysis, there was a slight decrease in hardness in the HAZ regions compared to the base metals. In the tensile test, all 3 samples broke from the AISI 430 main material part. Elongation amounts were measured between 16.81 and 17.90 mm, and tensile strengths were measured between 417 and 441 MPa. As a result of the study, it has been revealed that the mechanical properties of AISI 430 and HARDOX 500 steels combined with CMT Welding have increased significantly in the weld zone and weldability is possible.

 Bu çalışmada AISI-430 ve HARDOX 500 çelikleri Cold Metal Transfer CMT kaynak tekniği ile kaynak edilmiş, kaynak ve ITAB Isı Tesiri Altındaki Bölge bölgelerindeki mekanik özelliklerinde meydana gelen değişimler incelenmiştir. 100x130x6 mm boyutlarındaki AISI 430 ve HARDOX 500 çelikleri, şerit testere ile standart ebatlarda kesilerek, AWS 307 ilave tel kullanılarak CMT yöntemi ile birleştirilmiştir. Kaynaklı bölgelerin mekanik özellikleri ve mikroyapısal değişimleri çeşitli analizlerle ve mikrosertlik, çentik darbe ve çekme testleriyle ve deney numunelerinin çekme testinden sonra kopan yüzeyleri SEM analizleri ile incelenmiştir. Kaynak işlemi 140 A, 130 A ve 120 A akımlarda gerçekleştirilmiştir. Koruyucu gaz olarak 97.5 Argon ve 2.5 CO2 gazı kullanılmıştır. Kaynak sonrası optik görüntülerden morfolojilerdeki farklılıkların oluştuğu tespit edilmiştir. ITAB bölgelerinde kaba taneler oluşmuş, ancak bunlar CMT kaynağının düşük sıcaklık girdisi ile sınırlı miktarlarda kalmıştır. EDS analiz sonuçlarına göre bölgeler arasında atom geçişleri olduğu tespit edilmiştir. Sertlik analizinde, ITAB bölgelerinde ana metallere göre bir miktar sertlikte düşüş olmuştur. Çekme deneyinde 3 numune de AISI 430 ana malzeme kısmından kopmuştur. Uzama miktarları; 16.81 ile 17.90 mm arasında, çekme mukavemetleri de 417 ile 441 MPa arasında ölçülmüştür. Çalışma sonucunda CMT Kaynağı ile birleştirilen AISI 430 ve HARDOX 500 çeliklerinin kaynak bölgesindeki mekanik özelliklerinin önemli ölçüde arttığı ve kaynak edilebilirliğin mümkün olduğu ortaya konmuştur.

Makale detayları

Investigation of the weldability of AISI 430 and HARDOX 500 steels by CMT method

Yazarlar:

Mustafa Engin Kocadağistan

Yayıncı:

Pamukkale University

Ana Başlıklar:

Makine Mühendisliği (Diğer)

Dergi:

Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi Vol.30 Issue 3, pp.293-301

Belge Tipi:

Makale

Yayın Tarihi:

6/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001320570

pISSN:

2147-5881

CMT

Welding

AISI 430

HARDOX 500

Mechanical property

MicrostructureCMT

Kaynak

AISI 430

HARDOX 500

Mekanik özellik

Mikroyapı

Sayı

Makale detayları

Yazarlar: Mustafa Engin Kocadağistan

Yayıncı: Pamukkale University

Ana Başlıklar: Makine Mühendisliği (Diğer)

Dergi: Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi Vol.30 Issue 3, pp.293-301

Belge Tipi: Makale

Yayın Tarihi: 6/2024

Belge Dili: Türkçe

Document ID (Org No.): 2001320570

pISSN: 2147-5881

Sayı

Yazarlar:

Mustafa Engin Kocadağistan

Yayıncı:

Pamukkale University

Ana Başlıklar:

Makine Mühendisliği (Diğer)

Dergi:

Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi Vol.30 Issue 3, pp.293-301

Belge Tipi:

Makale

Yayın Tarihi:

6/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001320570

pISSN:

2147-5881