Why is Tungsten-carbide a Popular Choice for Die Inserts in Wire Drawing Processes?

What makes Tungsten-carbide a preferred material for die inserts in wire drawing processes?

A. Tungsten-carbide is cheaper than steel

B. Tungsten-carbide is very hard

C. Tungsten-carbide has a very high melting temperature

D. Tungsten-carbide has a low thermal expansion coefficient

Answer:

The incorrect statement is that "Tungsten-carbide insert is cheaper than steel insert." In reality, tungsten-carbide inserts are more expensive than steel inserts due to their superior properties.

Tungsten-carbide is a popular choice for die inserts in wire drawing processes due to its excellent properties.

1. Very Hard: Tungsten-carbide is known for its exceptional hardness, which is crucial for wear resistance and longer service life in wire drawing processes.

2. High Melting Temperature: Tungsten-carbide has a high melting temperature, making it suitable for use in high-temperature applications and providing increased durability.

3. Low Thermal Expansion Coefficient: A low thermal expansion coefficient allows tungsten-carbide to maintain its dimensions and shape under varying temperature conditions, providing dimensional stability in wire drawing processes.

Despite being more expensive than steel, tungsten-carbide inserts are preferred for their durability and longevity, reducing downtime for maintenance and replacement, which leads to cost savings in the long run.