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Texture evolution during annealing of warm rolled cr-containing low carbon steels

机译:热轧含铬低碳钢退火过程中的织构演变

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摘要

Two low carbon steels alloyed with 0.48wt% and 0.78wt% Cr were warm rolled to 65% reduction at 640°C. Annealing was carried out at 710°C to achieve a range of recrystallized volume fractions up to 100%. Texture analysis was performed by X-ray diffraction and Electron Back Scattering Diffraction. During the initial stages of recrystallization, more recrystallized grains nucleated at shear bands than at grain boundaries in the 0.48wt%Cr steel, whereas this was not the case in the 0.78wt%Cr steel. This is associated with a decrease in the propensity to form shear bands due to the lower amount of C in solid solution in the high-Cr steel. Additionally, the nuclei showed a preference to develop the same fiber as the deformed region within which they nucleated. In both steels, an increase in the annealing time led to the deterioration of the ND (or γ) –fiber and a strengthening of both the RD (or α) –fiber and Goss component. In the fully recrystallized samples, the ND component was somewhat stronger in the steel with the higher Cr content.
机译:将两种含0.48wt%和0.78wt%Cr的低碳钢在640°C下热轧至65%的压下率。在710°C进行退火,以实现高达100%的重结晶体积分数。通过X射线衍射和电子背散射衍射进行纹理分析。在再结晶的初始阶段,在0.48wt%Cr钢中,在剪切带上比在晶界处有更多的再结晶晶粒成核,而在0.78wt%Cr钢中则不是。这归因于高Cr钢中固溶体中较低的C含量,从而降低了形成剪切带的倾向。另外,核显示出优先发展与其成核的变形区域相同的纤维。在这两种钢中,退火时间的增加导致ND(或γ)-纤维的劣化以及RD(或α)-纤维和高斯成分的增强。在完全重结晶的样品中,Cr含量较高的钢中ND成分稍强。

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