[China Aluminum Industry Net] extrusion die in industrial aluminum extrusion force. It is used under high temperature conditions and is subject to strong frictional wear. Although high-quality heat-resistant tool steels are selected as the mold materials, the properties such as hardness, wear resistance, and thermal fatigue resistance are still not high after the traditional heat treatment. As a result, the service life of the mold is not long. In addition, the surface hardness of the mold is low, and the surface roughness of the working belt is gradually reduced, and the anti-adhesive property is poor, and the working belt is easy to adhere to small stuffing tumors. This grid results in pitting, scratches, and scratches on the surface of the extruded profile, which severely affects the surface quality of the aluminum profiles.
Appropriate surface strengthening treatment of the aluminum profile extrusion die is one of the more effective methods to improve die performance and prolong service life. Gas nitriding is an early mold surface hardening treatment technology. However, due to the long nitriding time and the brittleness of the nitrided layer, the effect of improving the service life of aluminum profile extrusion die is not ideal.
China's extrusion mold surface treatment technology is still relatively backward, and there is a big gap compared with foreign advanced water. Due to the rapid development of aluminum profiles in China in recent years, especially in the construction of aluminum profiles industry, people attach great importance to the problem of surface hardening of aluminum profile extrusion die, and have carried out research work on the new process of surface hardening of extrusion die.
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