Experimental investigation of the formability of ultrahigh-strength sheet material using local heat treatment
Yükleniyor...
Dosyalar
Tarih
2020
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Taylor & Francis Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this study, the effects of local heat treatment temperature on the V-bending formability of Martensitic 1200 steel, was investigated experimentally. In the first stage of the study, local heating temperatures were determined according to the stress-strain curves obtained as a result of the hot tensile test. Other experimental parameters included temperature (room temperature - RT/25, 300, 400 and 500 degrees C), die-punch angle (30, 60, 90 and 120 degrees) and punch holding time (0 and 10 s). The heating procedure in the bending operation was carried out locally only in the bending zone with the temperature controlled heating rod. The hardness values were found as 5.19% HV at the forming temperatures of RT-300 degrees C, 2.31% HV at 300-400 degrees C and 1.85% HV at 400-500 degrees C. Due to the coarseness of the carbides in the microstructure, softening of the sheet material was observed up to 400 degrees C. The slight increase in the flexure observed in the sheet materials bent at 500 degrees C was caused by secondary precipitation hardening.
Açıklama
Anahtar Kelimeler
UHSS, martensitic-1200, warm forming, Spring-back, Docol1200M, Forming, V bending, warm bending, Electric Vehicles, Springback, Prediction, Steel
Kaynak
Ironmaking & Steelmaking
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
47
Sayı
2
