A cemented-carbide tool is made of highspeed steel.

A cemented-carbide tool is made of highspeed steel.

• A. True
• B. False
• C. Copper
• D. Aluminum

Answer: (B)

Cemented-carbide tools are not made from high-speed steel; they are composed of hard carbide particles, typically tungsten carbide, bonded with a metallic binder such as cobalt. This structure gives very high hardness and wear resistance, which is essential for demanding cutting tasks. High-speed steel, while tougher and more ductile, doesn’t reach that level of hardness and wears more quickly under high-speed cutting. Copper and aluminum are soft and not suitable for cemented-carbide tooling or high-performance cutting applications. So the statement is false.

Cemented-carbide tools are not made from high-speed steel; they are composed of hard carbide particles, typically tungsten carbide, bonded with a metallic binder such as cobalt. This structure gives very high hardness and wear resistance, which is essential for demanding cutting tasks. High-speed steel, while tougher and more ductile, doesn’t reach that level of hardness and wears more quickly under high-speed cutting. Copper and aluminum are soft and not suitable for cemented-carbide tooling or high-performance cutting applications. So the statement is false.