Abstract
The effects of coating composition and coating weight on friction characteristics and formability under different deformation modes, as well as their mechanisms, were studied on zinc-iron electroplated drawing-quality special-killed (DQSK) sheet steels. Friction tests, simulative formability tests, and coating characterization were performed. The experiments revealed that the iron concentration of the coating has a tremendous effect on friction in the deep-drawing operation, but only a slight effect in the stretching operation. Uniaxial tension tests indicated that both coating weight and coating composition affectn-value andr-value. The dependence of friction characteristics,n-value, andr-value on iron concentration is related to the variation of coating hardness caused by the variation of iron concentration in the coating.
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