SOME TRIBOLOGICAL ASPECTS OF Fe-Zn COATED STEEL SHEETS AT STAMPING PROCESSES

Abstract

Contribution presents results of study of tribological characteristics of Fe-Zn coated steel sheets. Experimental research was done using coatings with different alloying – under alloyed, optimal and slightly pre alloyed. The optimally alloyed coatings and the slightly prealloyed ones were annealed in order to reach different alloying level. Alloying level was evaluated by phase composition and % Fe in coating. Tribological properties such as surface microgeometry, abrasion, friction coefficient were analysed from the view of formability. Experimental results of strip drawn test were used for verification of strip-drawn test numerical simulation. Based on numerical simulation results, contact pressure on drawing die radius was observed.

Keywords

• Fe-Zn coatings
• steel sheets
• coating morphology
• friction coefficient
• numerical simulation