Tempering and Annealing

Most of the time, you quench steel in:

• Oil

• Water

• Mayonnaise

• Gasoline

To anneal metal, you heat it up and then cool it _____

• As fast as possible

• Slowly by buring it in sand

• with dry ice

• Quickly in oil

If you are going to temper part of a piece of metal, you should cool it by:

• Spraying it with a hose

• Dip the hot part into water and move it around

• Blow on it

• Put it in a freezer

If you quench a piece of metal too soon, it may:

• Be even stronger

• Bend

• Shatter

• Rust

When you heat or cool metal:

• Its characteristics will change

• It will rust

• It will shrink

• None of these

To bend metal more than 3/8", you need to ____ it

• Cool

• Quench

• Wet

• Heat

to bend metal, heat it until:

• It turns blue

• It starts to melt

• It screams

• It's cherry red

Hardening metal does what to it? (Choose 2)

• Gives the metal more spring strength

• Makes it softer

• Makes it less ductile

• Makes it easier to cut

Tempering hardened steel is needed because:

• It makes it more expensive

• It makes the steel weaker

• It makes it less brittle

• It makes it turn red

You anneal steel to:

• Make it brittle

• Make it soft

• Make it tough/durable

• Mayonnaise