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Bobby Pin/Paper Clip Heat-Treating Lab
Objective: Determine the processes which produce various forms of steel.
Background:
Anneal- to subject to a process of heating and slow cooling. Hardening- to subject to a process of heating and fast cooling. Temper- to subject to a process of repeated heating and cooling. Quench- to cool quickly by plunging into water.
Materials: In this lab the materials that were given, were four Bobby Pins, and four Paper Clips, a plastic cup with water in it, a pair of pliers/tweezers, a blow torch, and a lighter to light the torch with.
Hypothesis: My hypothesis of which procedure would produce the strongest steel was tempering because we were heating the steel up then cooling it directly and repeating the process. The procedure I thought would produce the weakest steel was hardening because it was cooling too fast after being heating up fast too.
Procedure:
1. Go to your Lab Station, and check to make sure you have all your materials needed.
2. You will need four Bobby Pins, four Paper Clips, a plastic cup filled with water, a blow torch, a lighter, and pliers/tweezers.
3. Grab a Paper clip and bend it as many times as it takes you until it breaks without heating it or cooling it. This is called the Control.
4. Do the same thing to a Bobby pin, that you did to the Paper Clip in step 3.
5. Now you need to start Annealing, hold onto the bobby pin and Paper clip, separately and heat it very slowly, don’t let it get red hot, then hold it off to the side and let it cool.
6. Same process, except this time we are starting the Hardening, heat them up fast then dunk it into the water, so it cools fast.
7. Same process except, except this time we are Tempering, heat it fast, dunk it in water to cool fast, then repeat once more.
8. Same process, except start Quenching, which is where you heat it, and dunk it into the water DIRECTLY after heating it.
9. Last but not least, see
Objective: Determine the processes which produce various forms of steel.
Background:
Anneal- to subject to a process of heating and slow cooling. Hardening- to subject to a process of heating and fast cooling. Temper- to subject to a process of repeated heating and cooling. Quench- to cool quickly by plunging into water.
Materials: In this lab the materials that were given, were four Bobby Pins, and four Paper Clips, a plastic cup with water in it, a pair of pliers/tweezers, a blow torch, and a lighter to light the torch with.
Hypothesis: My hypothesis of which procedure would produce the strongest steel was tempering because we were heating the steel up then cooling it directly and repeating the process. The procedure I thought would produce the weakest steel was hardening because it was cooling too fast after being heating up fast too.
Procedure:
1. Go to your Lab Station, and check to make sure you have all your materials needed.
2. You will need four Bobby Pins, four Paper Clips, a plastic cup filled with water, a blow torch, a lighter, and pliers/tweezers.
3. Grab a Paper clip and bend it as many times as it takes you until it breaks without heating it or cooling it. This is called the Control.
4. Do the same thing to a Bobby pin, that you did to the Paper Clip in step 3.
5. Now you need to start Annealing, hold onto the bobby pin and Paper clip, separately and heat it very slowly, don’t let it get red hot, then hold it off to the side and let it cool.
6. Same process, except this time we are starting the Hardening, heat them up fast then dunk it into the water, so it cools fast.
7. Same process except, except this time we are Tempering, heat it fast, dunk it in water to cool fast, then repeat once more.
8. Same process, except start Quenching, which is where you heat it, and dunk it into the water DIRECTLY after heating it.
9. Last but not least, see