Aluminum alloy die-casting has the characteristics of high production efficiency, saving raw materials, reducing production costs, good product performance and high precision, so many products are aluminum alloy die-casting process.
And the die casting mold is the key to determine the quality of aluminum alloy die casting, so the heat treatment of die casting mold is the attention of aluminum alloy die casting factory. The working surface of the die casting die is directly in contact with the liquid metal, and bears the erosion and heating of the liquid metal with high pressure and high speed flow. After the workpiece is demodelled, it is rapidly cooled. Therefore, thermal fatigue cracking, thermal wear and thermal melt corrosion are common failure forms of the die casting die. The die casting mould is required to have cold and hot fatigue resistance, strength and toughness under high temperature, liquid metal erosion resistance, high heat resistance and high thermal conductivity, good oxidation resistance and high hardenability and wear resistance.
Heat treatment is an important link to improve the service life of die casting die. According to the experience of aluminum alloy die casting factory itself, the problem of heat treatment process and operation is the most important factor that causes the scrap of die casting die.
Bad working conditions require die casting molds to have good high temperature mechanical properties, cold and hot fatigue resistance, liquid metal erosion resistance, oxidation resistance and high hardenability and wear resistance, etc. Heat treatment is the main manufacturing process to determine these properties.
The heat treatment of the die casting mold is to change the structure of the steel to obtain high hardness and wear resistance on the surface of the mold, while the core part still has enough strength and toughness, and effectively prevent the molten metal from sticking to the mold and erosion. The waste products can be reduced and the service life of the die can be significantly increased by choosing proper heat treatment process.