Forming mechanism of water marks on cold-rolled nickel-saving stainless steel

doi:10.13251/j.issn.0254-6051.2024.10.047

Abstract

Abstract: Water marks occurred on the surface of cold-rolled nickel-saving stainless steel strip after continuous annealing, which would evolve into corrosion and cause serious loss. The surface morphology, composition, microstructure and corrosion resistance of the stainless steel strip specimens with and without water marks were compared and analyzed by means of metallographic microscopy, scanning electron microscopy and EDS analysis, and the forming mechanism of water marks was studied in combination with rolling process. The results indicate that during the cold rolling process of stainless steel, the middle part of the cold-rolled nickel-saving stainless steel where the water marks forms is in a high speed rolling state and is at a higher plastic deformation rate than the head and end without water marks. The high speed rolling results in numerous deformation bands within the microstructure of the strip which compromise the corrosion resistance of cold-rolled stainless steel, ultimately leading to the formation of numerous micro-pitting water marks.

Key words: nickel-saving stainless steel, cold rolling, annealing, water marks

CLC Number:

TG156.26

Lu Fei, Liu Qu, Guo Yongliang, Li Xiaolei, He Liu. Forming mechanism of water marks on cold-rolled nickel-saving stainless steel[J]. Heat Treatment of Metals, 2024, 49(10): 290-294.

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