Investigation of the Effect of RSW Parameters on the Hardness of DC01 Steel with Multiple Regression Analysis

Year 2023, Volume: 28 Issue: 2, 620 - 628, 31.08.2023

Muhammed Elitaş

https://doi.org/10.53433/yyufbed.1171388

Abstract

This study made different resistance spot welding combinations on DC01 steel with welding parameters of 8-10-12 kA welding current and 1.96-2.94 kN electrode force. Microhardness measurements were carried out along base metal, heat affected zone and weld metal. The theoretical hardness value was calculated using the literature's formulas and compared with the obtained experimental results. With multiple regression analysis, the importance levels of the welding parameters on the hardness value were determined, and the model was established. Consequently, the microhardness value increased as the electrode force and welding current increased. While a higher hardness value was found in 12 kA-2.94 kN welding parameters compared to the theoretical value, lower values were obtained in other welding parameters. As a result of multiple regression analysis, the importance level of welding current on hardness was higher than electrode force.

Keywords

DC01 steel, Electrode force, Microhardness, Multiple regression analysis, Welding current

DC01 Çeliğinin Sertliğine NDK Parametrelerinin Etkisinin Çoklu Regresyon Analiziyle İncelenmesi

Abstract

Bu çalışmada DC01 çeliğine 8-10-12 kA kaynak akımı ve 1.96-2.94 kN elektrot kuvveti kaynak parametrelerinde farklı nokta direnç kaynak işlemleri uygulanmıştır. Ana metal, ısının tesiri altındaki bölge ve kaynak metali boyunca mikrosertlik ölçümleri gerçekleştirilmiştir. Literatürde kullanılan formüller ile teorik sertlik değeri hesaplanmış ve elde edilen deneysel sonuçlar ile karşılaştırılmıştır. Çoklu regresyon analizi ile kaynak parametrelerinin sertlik değeri üzerindeki önem düzeyleri belirlenmiş ve model kurulmuştur. Sonuç olarak kaynak akımı ve elektrot kuvveti arttıkça mikrosertlik değeri artmıştır. 12 kA-2.94 kN kaynak parametrelerinde teorik değere göre daha yüksek sertlik değeri bulunurken, diğer kaynak parametrelerinde daha düşük değerler elde edilmiştir. Çoklu regresyon analizi sonucunda kaynak akımının sertlik üzerindeki önem düzeyi elektrot kuvvetinden daha yüksek çıkmıştır.

Keywords

Çoklu regresyon analizi, DC01 çeliği, Elektrot kuvveti, Kaynak akımı, Mikrosertlik

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