Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi
Yazarlar: Mustafa Merih ARIKAN
Konular:Malzeme Bilimleri, Ortak Disiplinler
DOI:10.28948/ngumuh.295641
Anahtar Kelimeler:Failure analysis,Bending cylinder bushing,Hot rolling
Özet: Premature failure of a bending cylinder bushing in a plate mill was investigated in this study. Visual, chemical and microscopic analyses were performed to detect the possible reasons of this failure and possible measures to be taken were mentioned not to be encountered for this type of failures in the future. No traces of welding were observed in the performed studies. Intensive elongated MnS inclusions, fatigue striations and splits from the grain boundaries were detected in the microstructural investigations. It was also proved that the base of the bushing was worked without chamfering. The importance of the removing hydrogen from the structure by annealing to decrease the hydrogen brittleness risk which would occur after the chromium coating process, and the chamfering of the bushing base to decrease the crack susceptibility was stressed.