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Suggestions for Aluminium extrusion die nitriding times and billet quantity control

Suggestions for Aluminium extrusion die nitriding times and billet quantity control

Suggestions for Aluminium extrusion die nitriding times and billet quantity control of trial production

After nitriding treatment,it can improve die surface hardness to reduce hot abrasion.But on the die surface,nitriding treatment is not finished in one time,normally during die working life 3-5times nitriding treatment is needed,and the nitriding thickness is about 0.15mm.

1.for first die trial,because the nitride film is not steady,production billet quantity should be control in 5-10pcs.After second nitriding treatment,production billet quantity should be control in 40-80pcs.After second nitriding treatment,production billet quantity should be control in 100-120pcs.Before nitriding working,bearing should be polished and clean the die inside,any residue soda or other particulate matter should be clean up completely.After 4-5 times nitriding treatment,the nitide film is steady,die can work to the end of its life but you must confirm the bearing is in good condition.

(Remarks:The nitriding treatment is under well processing,nitriding time should be not frequent,otherwise the bearing will be delaminating)

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