Transactions of Materials and Heat Treatment

Title：Study on magnetism of 2205 duplex stainless steel during cold rolling

Authors： Feng Zhihui Li Jingyuan Wang Yide

Unit： University of Science and Technology Beijing

KeyWords： cold rolling magnetism ferrite meter measurement

ClassificationCode：

year,vol(issue):pagenumber：2015,40(7):135-140

Abstract：

The question that why 2205 magnetic of duplex stainless steel dramatically changes during cold rolling was explained. The materials magnetism change before and after cold rolling was studied by cold rolling (up to the effective strain of 70%).The magnetism change was measured by optical microscopy (OM), ferrite meter measurement, X-ray diffraction and EBSD. The results show that, ferrite decomposition of dual phase stainless does not occur at the normal temperature during cold rolling, and there will be little stain-induced martensite transformation as Cr in material is more than 20%, and the content of hardness measurements also show no martensitic transformation. Compared with cast samples, the ferrite content value of cold rolling samples drops by 15% with ferrite meter. Among the related factors that might influence magnetism, the change of ferrite meter mainly comes from the ferrite magnetism change during cold rolling process. The influence from grain refinement, subgrain boundary generated by dislocation tangles, internal stress field caused by large deformation and texture will significantly decrease the magnetism of the ferrite.

Funds：

国家自然科学基金资助项目(51174026)；十二五国家科技支撑计划(2012BAE04B02)

冯志慧(1988-)，女，博士研究生

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