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通过扫描电镜和能谱分析对2205双相不锈钢表面起皮缺陷进行了研究。对比了304、410S和2205钢高温变形抗力。结果表明,起皮缺陷中Fe、Cr、O的含量较高,为典型的次生氧化皮成分;低应变速率下,两相塑性差异较小,随着应变速率的增加,奥氏体和铁素体塑性差异增大。在高应变速率下,奥氏体和铁素体塑性变形不协调导致形成微裂纹,轧制时被拉长,酸洗后形成起皮缺陷。
The dermal surface defects of 2205 duplex stainless steel were studied by scanning electron microscopy and energy spectrum analysis. Compare the high temperature deformation resistance of 304, 410S and 2205 steel. The results show that the content of Fe, Cr and O in the skinning defects is high, which is a typical secondary scale component. The plasticity difference between the two phases is low under the low strain rate. With the increase of the strain rate, the content of austenite and iron Differences between the body plastic increased. At high strain rates, the uncoordinated austenite and ferrite plastic deformation leads to the formation of microcracks that are elongated during rolling and pickled to form flaking defects.