Heat and chemical treatments

Select the correct definition for normalising.

• The rapid cooling of a hot metal by immersing it in a liquid

• A heat treatment that increases the hardness and strength of a metal due to a chnage in the arrangement of atoms within it.

• A heat treatment process to remove brittleness in hardened steel, at the cost of some hardness.

• A heat treatment csrried out on steel that has been owrk hardened this process involves heating steel to its upper critical point and allowing to coll naturally in air.

• A process that involves heating a metal to a suitable temperature to make it softer and easuer to work. It is used to soften work hardened metal or to make metals easier to bend into complicated shapes.

Select the correct definition for annealing.

• The rapid cooling of a hot metal by immersing it in a liquid

• A heat treatment that increases the hardness and strength of a metal due to a chnage in the arrangement of atoms within it.

• A heat treatment process to remove brittleness in hardened steel, at the cost of some hardness.

• A heat treatment csrried out on steel that has been owrk hardened this process involves heating steel to its upper critical point and allowing to coll naturally in air.

• A process that involves heating a metal to a suitable temperature to make it softer and easuer to work. It is used to soften work hardened metal or to make metals easier to bend into complicated shapes.

Select the correct definition for hardening.

• The rapid cooling of a hot metal by immersing it in a liquid

• A heat treatment that increases the hardness and strength of a metal due to a chnage in the arrangement of atoms within it.

• A heat treatment process to remove brittleness in hardened steel, at the cost of some hardness.

• A heat treatment csrried out on steel that has been owrk hardened this process involves heating steel to its upper critical point and allowing to coll naturally in air.

• A process that involves heating a metal to a suitable temperature to make it softer and easuer to work. It is used to soften work hardened metal or to make metals easier to bend into complicated shapes.

Select the correct definition for quenching.

• The rapid cooling of a hot metal by immersing it in a liquid

• A heat treatment that increases the hardness and strength of a metal due to a chnage in the arrangement of atoms within it.

• A heat treatment process to remove brittleness in hardened steel, at the cost of some hardness.

• A heat treatment csrried out on steel that has been owrk hardened this process involves heating steel to its upper critical point and allowing to coll naturally in air.

• A process that involves heating a metal to a suitable temperature to make it softer and easuer to work. It is used to soften work hardened metal or to make metals easier to bend into complicated shapes.

Select the correct definition for tempering.

• The rapid cooling of a hot metal by immersing it in a liquid

• A heat treatment that increases the hardness and strength of a metal due to a chnage in the arrangement of atoms within it.

• A heat treatment process to remove brittleness in hardened steel, at the cost of some hardness.

• A heat treatment csrried out on steel that has been owrk hardened this process involves heating steel to its upper critical point and allowing to coll naturally in air.

• A process that involves heating a metal to a suitable temperature to make it softer and easuer to work. It is used to soften work hardened metal or to make metals easier to bend into complicated shapes.

Annealing allows the grains in a metal to reduce in size.

• True

• False

Annealing allows the grains in a metal to reduce in size.

• True

• False

Annealing makes a metal softer and easier to work

• True

• False

Annealing relieves internal stresses in a metal.

• True

• False

Annealing is not used on non-ferrous metals

• True

• False