What performance indicators affect the lifespan of molds?

hardness
Hardness is the ability of a material to resist being pressed in by external objects. Generally speaking, the higher the hardness, the greater the compressive strength, and the stronger the wear resistance and anti bite ability. However, the toughness will decrease, and the resistance to thermal fatigue and machinability will also deteriorate. Design appropriate hardness according to the working environment of the mold.

Wear resistance

Wear resistance refers to the ability of a material to resist wear, usually expressed in terms of the amount of wear. It is related to factors such as material strength, toughness, hardness, etc. During the working process of the mold, materials with good wear resistance can reduce dimensional changes and surface damage caused by friction, thereby extending the service life of the mold. For example, high hardness mold materials typically have better wear resistance, but excessively high hardness may lead to increased brittleness and affect overall performance.

Corrosion resistance

Corrosion resistance is the ability of a material to resist corrosion from surrounding media. For some molds that work in special environments (such as contact with corrosive substances), corrosion resistance is particularly important. Good corrosion resistance can prevent premature failure of molds due to corrosion, ensuring their long-term stability and reliability. For example, stainless steel molds have better corrosion resistance in humid or corrosive environments.

Fracture toughness

Fracture toughness is an indicator of the ability of mold materials to resist crack propagation and fracture. For molds that bear large loads or have stress concentration, higher fracture toughness can prevent the generation and propagation of cracks, reducing the risk of mold fracture. For example, materials with high fracture toughness are suitable for use in high stress, high impact mold environments.

Impact toughness

Impact toughness is an indicator that measures the ability of a mold to withstand impact loads or impact energy. Mold materials with high impact toughness can absorb energy without fracture when subjected to sudden impacts, which is very important for some molds that may be subject to unexpected impacts during operation. For example, materials with high impact toughness are suitable for molds that need to withstand impact loads, such as stamping molds.

Integrated application

In practical applications, it is necessary to comprehensively consider hardness, wear resistance, corrosion resistance, fracture toughness, and impact toughness based on the working environment and requirements of the mold. For example:
High hardness and high wear resistance: suitable for high-precision and high wear resistant molds, such as stamping molds and injection molds.
High fracture toughness and high impact toughness: suitable for molds that can withstand large loads or have stress concentration, such as forging dies and stamping dies.
High corrosion resistance: molds suitable for working in corrosive environments, such as chemical molds and marine environment molds.
By selecting and balancing these performance indicators reasonably, molds that meet specific working environment requirements can be designed to improve their service life and reliability.