Behrooz Khatami

The major factors the die life are: temperature and extrusion process, tribology and nitration .Excessive die wear during extrusion and removal of WHITE LAYER and stop extrusionbefore we get to Diffusion Zone(contains nitrides).Nitration depth should be max. 150μM.White layer thickness should be Max10μM .Die wear is one of the tribology aspects and as the destroying of continuous material of the die surface is defined . Wear have the harmful effects , because of the flow , product shape and contact surface the die change it , also on the process , size , shape and quality the flow of material from in the die have effect . Wear can lead to serious damage and change the topography and shape in the surface the hollow of dies (mandrel and matrix), particular mandrel of die.

Extrusion,Thickness,Dies,Wear,Bearing,Temperature,Nitration