1. After the mold is treated with nitride, the nitride layer has a certain degree of hardness, depth, toughness and heat resistance, greatly improving the anti-bite and wear resistance of the mold. Good nitride process can improve the quality and service life of mold nitride, reduce costs and increase competitiveness.

2. Aluminum profile squeeze production, mold on product quality, production costs have a great impact. After the mold is used at high temperature and high pressure, the work belt is easy to wear and affects the surface quality of the aluminum profile. The operating conditions of the extrusion mold are sustained by intense thermal stress, shock stress and wear and tear for long periods of high temperature and high pressure. Therefore, to improve the hardness of the mold surface, extend the life of the mold for high-quality, low-cost aluminum alloy profile production is of great significance.