Chapter 22 - Cutting Tool Technology

Of the following cutting conditions, which one has the greatest effect on tool wear

• cutting speed

• feed

• depth of cut

As an alloying ingredient in high-speed steel, tungsten serves which of the following functions (two best answers)

• forms hard carbides to resist abrasion

• improves strength and hardness

• increases corrosion resistance

• increases hot hardness

• increases toughness

Cast cobalt alloys typically contain which of the following main ingredients (three best answers)

• aluminum

• cobalt

• chromium

• steel

• tungsten

Cast cobalt alloys typically contain which of the following main ingredients (two best answers)

• Al₂O₃

• Co

• CrC

• TiC

• WC

An increase in cobalt content has which of the following effects on WC-Co cemented carbides (two best answers)

• decreases hardness

• decreases transverse rupture strength

• increases hardness

• increases toughness

• increases wear resistance

Steel-cutting grades of cemented carbide are typically characterized by which of the following ingredients (three correct answers)

• Co

• Fe

• Ni

• TiC

• WC

If you had to select a cemented carbide for an application involving finish turning of steel, which C-grade would you select (one best answer)

• C1

• C3

• C5

• C7

Which of the following processes are used to provide the thin coatings on the surface of coated carbide inserts (two best answers)

• chemical vapor deposition

• electroplating

• physical vapor deposition

• pressing and sintering

• spray painting

Which one of the following materials has the highest hardness

• aluminum oxide

• cubic boron nitride

• high-speed steel

• titanium carbide

• tungsten carbide

Which of the following are the two main functions of a cutting fluid in machining (two best answers)

• improve surface finish on the workpiece

• reduce forces and power

• reduce friction at the tool-chip interface

• remove heat from the process

• wash away chips