Lecture 3 - Cutting Tools

Out of the following cutting tools, the hardest one which is next to diamond is:

• Cubic boron nitride

• High-Speed Steel

• Ceramics

• Cemented carbide

Which of the following materials is NOT used to make cutting tools?

• High-speed steels

• • Cemented carbides

• • Stellite

• Cast iron

What property ensures that the cutting tool maintains its shape and efficiency during machining?

• • Wear resistance

• Red hardness

• Toughness

• Abrasive resistance

What is another name for red hardness?

• • Hot strength

• Red strength

• Wear resistance

• Toughness

Which property allows the cutting tool to resist shock and impact during machining operations?

• • Wear resistance

• • Red hardness

• Toughness

• Abrasive resistance

What advantage do indexable inserts offer in terms of tool maintenance?

• • Reduced cost of diamond wheels.

• • Elimination of regrinding time.

• • Ability to use faster speeds and feeds.

• Cheaper than brazed-tip tools.

How does finer grain particle size affect the toughness of tungsten carbide tools?

• • Increases toughness

• • Decreases toughness

• • Has no effect on toughness

• Increases wear resistance