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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Evolution of deformation-induced texture and surface microstructure of
nickel coating under deep cup-drawing process
LONG Shi-guo(龙士国), MA Zeng-sheng(马增胜), ZHANG Xiao-bing(张小兵),
PAN Yong(潘  勇), ZHOU Yi-chun(周益春)

Key Laboratory of Low Dimensional Materials & Application Tecnology, Ministry of Education,
Faculty of Materials, Photoelectronic & Physics, Xiangtan University, Xiangtan 411105, China

Abstract:The deformation texture and surface microstructure of nickel coating induced by deep cup-drawing were studied by X-ray diffractometry and SEM. The steel sheet with nickel coating was firstly punched to designed degree of cup shapes. Then the texture of the coating was determined by XRD and the surface microstructure was observed by SEM. The results indicate that, the nickel coating material includes three kinds of textures, i.e. Ni (111), Ni (200) and Ni (220). After cup-drawing deformation, there doesn’t appear new texture component for nickel coatings but the change of the intensity of the deformation textures. In the cup-deformation process, the two kinds of main textures Ni (111) and Ni (200) increase in the first and second cup-drawing procedures and then reduce quickly in the third and fourth drawing procedure. However, for the Ni (220) texture, it always increases in whole cup-drawing procedures. With the increase in the drawing, there are some cracks to be found, but not delamination. This shows that nickel coating and the substrate have a good combinable performance.

 

Key words: electrodeposited nickel coating; drawing; deformation-induced texture; microstructure

ISSN 1672-7029
CN 43-1423/U

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