how to maintain an aluminum extrusion die

Aluminium profile extrusion die material:Industrial aluminium profile extrusion die material is H13 steel, aluminum extrusion dies after nitriding is necessary before working. Aluminium profile extrusion die structure:Generally an extrusion die is consisted of the die plate, die bolster and die ring

Aluminium profiles cracks marks on the surface, the main reasons :1, Extrusion temperature is too high, may lead to the surface layers of metal tensile strength decreased, so the friction aluminum workbench is produced under the action of crack.2, Because of the friction to metal surface with gallas