6.1 T3 Ferrous Metal and Its Alloys Quiz

Austenitic stainless steels are.

• Magnetic.

• Non-magnetic.

• Hardened by heat treatment.

The formation of steel depends upon.

• The formation of pearlite into austenite.

• The formation of austenite into pearlite.

• The presence of pearlite in the structure.

The hardness of steel depends upon.

• Formation of pearlite into austenite.

• Formation of cementite.

• The iron austenite grain structure.

Austenitic steel is produced when the material is heated to.

• Above the Upper Critical Point.

• Above the Lower Critical Point.

• Below the Upper Critical Point.

Steel begins to appear dull red at about 1 000 °F, and as the temperature increases, the color changes gradually through various shades of.

• Red to yellow, to orange and finally white

• Red to white, to yellow and finally orange

• Red to orange, to yellow and finally white

The ability of mild steel to accept more load after the yield point is reached is due to.

• Necking.

• Strain hardening.

• Plasticisation.

The purpose of heat treatment is.

• Change the mechanical property of steel (remark physical properties)

• To change the internal structure of steel

• To change the appearance of the component

What is the main purpose of annealing?

• To improve machinability

• To improve magnetism

• To increase hardness

Case Hardening is a method of producing hard skin on the surface of.

• High-carbon steel parts

• Cast iron (heavy parts)

• Low-carbon steel parts

The process of increasing carbon percentage on the surface of Low-carbon steel is known as.

• Hardening

• Nitriding

• Carburizing