High temperature thermo-plasticity of hot rolled Fe-1.80Mn-1.05Al-0.09C low density steel

doi:10.13251/j.issn.0254-6051.2023.02.007

Abstract

Abstract: High-temperature (760-1200 ℃) thermo-plasticity of a low alloy hot rolled low density steel was studied by means of Gleeble 3500 thermal simulation test machine. The fracture morphology and microstructure near fracture were characterized by optical microscope, stereomicroscope and scanning electron microscope. The results show that with the increase of tensile temperature, the fracture area gradually shrinks and dimples gradually become larger and deeper. The overall percentage reduction of area is good, which can reach more than 80%, showing good high temperature thermo-plasticity. However, when the tested steel is stretched at 900-1000 ℃, there are multiple neck shrinkage phenomena. There is a theoretical low plastic valley at 900-1000 ℃. It is necessary to avoid slab straightening or rolling at 900-1000 ℃.

Key words: low density steel, high temperature thermo-plasticity, fracture morphology, tensile strength, neck shrinkage

CLC Number:

TG142.1

Ma Yingjian, Peng Qichun, Yuan Qing, Liang Liang, Qi Jianghua, Xiao Aida, Xue Zhengliang. High temperature thermo-plasticity of hot rolled Fe-1.80Mn-1.05Al-0.09C low density steel[J]. Heat Treatment of Metals, 2023, 48(2): 43-49.

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