Transactions of Materials and Heat Treatment

Title：Analysis on white spot wear defect on surface of 5182 aluminum alloy strip after rolling

Authors： Huang Peng1 Xu Yueting2 Zhang Mengxiao2 Su Daoxin2 Sun Jianlin2

Unit： 1. Institute for Advanced Materials and Technology University of Science and Technology Beijing 2. School of Materials Science and Engineering University of Science and Technology Beijing

KeyWords： 5182 aluminum alloy surface defect process lubrication hot rolling cold rolling

ClassificationCode：TH117.2

year,vol(issue):pagenumber：2024,49(4):112-117

Abstract：

For the white spot defect of 5182 aluminum alloy after cold rolling, its mechanism was studied, and the morphology characterization and composition analysis for the white spot defect of cold rolled strip and the supplied material of hot rolled plate were conducted by confocal scanning microscopy, scanning electron microscope, energy dispersive spectrometer(EDS) and so on. The results show that the white spot defect is generated from bad lubrication of cold rolling and hot rolling processes. The adhesion of aluminum in hot rolling causes surface roughening and inherits to the cold rolling process. In the cold rolling process with large reduction rate, insufficient lubrication produces adhesive wear and abrasive wear, which further aggravates the metal roughening and causes the surface to lose luster, resulting in the white spot wear defects on the surface in macroscopic. By strengthening the filtration of aluminum powder, increasing the emulsion concentration of hot finishing rolling and the viscosity of cold rolling oil, no defects such as wear debris, adhesive wear and cracks are found on the surface of hot rolled plate, the surface color of cold rolled aluminum alloy strip is uniform, and there is no white spot defect.

Funds：

国家重点研发计划项目(2021YFB3701300)；2023年度开封市科技发展计划项目（23ZDYF005）

作者简介：黄鹏（1980-），男，硕士，工程师 E-mail：huangp@ustb.edu.cn 通信作者：孙建林（1969-），男，博士，二级教授，博士生导师 E-mail：sjl@ustb.edu.cn

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