Transactions of Materials and Heat Treatment

Title：Affecting factors and process optimization of orange peel

Authors： Li Xiaogang Zhao Aimin Yang Yuwei Li Hongqi Wu Shengjun Kuai Zhen

Unit： University of Science and Technology Beijing Beijing Electric Vehicle Co. Ltd.

KeyWords： stamping process orange peel strain analysis safety margin grain refinement

ClassificationCode：TG304

year,vol(issue):pagenumber：2016,41(9):31-34

Abstract：

For hard-forming parts such as side panels, the orange peel defects produced by oil stone

polishing affect the life of parts and coating quality. It is found that the strain in the

defect area is 10% larger than that in the safety margin. However, under this safety margin,

it would not appear rough surface caused by serious thinning after margin strain analysis.

Furthermore, it is found that the strain state is plane strain. Under the plane strain state

the distance between grains in the material is sensitive to deformation, and uncoordinated

deformation is prone to happen. Moreover, process parameters of hot-rolling temperature and

curing temperature are optimized in material production, and the material microstructure is

refined. Thus, material surface of formed parts is denser after polishing, and the defects of

orange peel are solved.

Funds：

国家自然科学基金资助项目（51271035；U1560107）

李晓刚（1980-），男，博士研究生，高级工程师

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