Jiangyin EPS aluminum Co.,Ltd

Jiangyin EPS aluminum Co.,Ltd

Surface nitriding treatment and maintenance before the die running on the press

The surface nitriding treatment can greatly improve the surface hardness of the die on the premise of maintaining enough toughness, so as to reduce the thermal wear of the die.It should be noted that surface nitriding is not a one-time can be completed, during the usage of the die must be carried out 3-4 times of repeated nitriding treatment, nitriding layer thickness is generally required to reach about 0.15mm.The proper nitridation process is the first nitridation after the incoming inspection.At this time, since the structure of the nitriding layer is not stable, it should be nitrided again after squeezing 5-10 billet.After the second nitriding, 40-80 billets can be extruded.After the third nitriding, no more than 100-120 billets are recommended.Before nitriding, the working belt must be polished, and the die cavity must be cleaned without residual alkali residue or foreign matter particls.In general, the number of nitriding of the die is no more than 4-5 times, because at this time, if the nitriding layer is not pulled by the working belt, after repeated nitriding and extrusion production, the structure of the nitriding layer has been relatively stable.It should be noted that in the early stage of nitriding, nitriding can only be carried out through appropriate production process, and The Times of nitriding should not be too frequent, otherwise the working belt is easy to be destroyed.
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