Method for plasma nitriding for extrusion die of aluminum

摘要

The present invention relates to a plasma nitridation process of aluminum extrusion die method.; The method of the present invention, a method for supplying a voltage of 540V, and generates a plasma by introducing a gas mixture of the material to be treated to a temperature 530 ℃ and H ₂ -N ₂ -CH ₄ nitriding the aluminum extrusion die in a vacuum in the bipolar ratio of 5 through the micro-pulse supply: 1 to 15: 1 within (most preferably 10: 1), a bipolar micro by the pulse is applied uniformly without a local overheating of the base material surface occurs nitride layer and diffusion layers are put on the technical features to ensure that generated.; The plasma nitriding method of the present invention is an aluminum extrusion die, by the local overheating by effectively controlling the electronic by using a bipolar pulse micro plasma to prevent the gap of the slits with the advantage that a uniform hardness is maintained over the entire area 1.1mm is an accurate and fine glow is formed in the case of which an effect of the shape limitations overcome, and white layer formed on the surface of the base material by the present invention is peeled off during the extrusion as Fe _2-3 N as a dense single phase or tissue Wash-out (wash out) as soon phenomenon is prevented thereby resulting in extending the life of the mold as well as it is possible to greatly reduce a time loss in the production required in an exchange of the mold.