Die-casting molds are important tools for manufacturing metal parts. Their quality, life and production efficiency have a vital impact on the quality and production cost of products. When selecting the material of the die-casting mold, many factors need to be considered, such as strength and toughness, wear resistance, thermal stability and processing performance. The following is a detailed interpretation of these factors.

Strength and toughness are key factors affecting the service life of die-casting molds. Since die-casting molds need to withstand greater pressure and impact during operation, the strength and toughness of the material must meet certain requirements. Strength refers to the ability of the material to resist external force damage, and toughness refers to the ability of the material to undergo plastic deformation without breaking when subjected to force. Commonly used mold materials include tool steel, alloy steel and cemented carbide, which have high strength and toughness and can meet the use requirements of die-casting molds.

Wear resistance refers to the resistance of the material to wear and grinding. Since the die-casting mold will be impacted and rubbed by the metal liquid during operation, the wear resistance of the material is also an important consideration. Among the commonly used mold materials, cemented carbide has excellent wear resistance and can effectively extend the service life of the mold. In addition, the wear resistance of the mold can be further improved through surface treatment technologies such as surface carburizing and nitriding.

Thermal stability refers to the material's ability to resist deformation and thermal fatigue at high temperatures. Since the die-casting mold needs to withstand high temperatures and rapid cooling during operation, the thermal stability of the material is also an important consideration. Among the commonly used mold materials, tool steel and alloy steel have good thermal stability and can maintain the shape and size of the mold. In addition, through reasonable mold design and cooling system design, the temperature change and thermal stress of the mold can also be reduced, and the thermal stability of the mold can be improved.

Processing performance refers to the machinability, weldability and heat treatability of the material during processing. Since the processing of the die-casting mold requires multiple processes such as milling, drilling, and turning, the processing performance of the material is also an important consideration. Among the commonly used mold materials, tool steel and alloy steel have good processing performance and can meet the processing requirements of the mold. In addition, through reasonable heat treatment process and surface treatment technology, the processing performance of the mold can be further improved.