EFFECT OF COATING CHARACTERISTICS ON FRICTION AND FORMABILITY OF ZN-FE ALLOY ELECTROPLATED SHEET STEEL

The effects of coating composition and coating weight on friction char acteristics 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 e xperiments revealed that the iron concentration of the coating has a t remendous effect on friction in the deep-drawing operation, but only a slight effect in the stretching operation, Uniaxial tension tests ind icated that both coating weight and coating composition affect n-value and r-value, The dependence of friction characteristics, n-value, and r-value on iron concentration is related to the variation of coating hardness caused by the variation of iron concentration in the coating.