I need help answering this because I am doing a science fair priject on it and I need some links or some answers. Will you please help me?
2006-08-25 05:53:59 · 10 answers · asked by Brit 1 in Science & Mathematics ➔ Other - Science
Rapid cooling of steel (sometimes in water or oil) is called quenching. It increases the hardness of steel by affecting the crystalline structure which forms. The subject is complex because of the wide range of chemical compositions of steel (carbon and nickel for example) and the range of uses to which it is put. For a flavour of the complexity see:
http://en.wikipedia.org/wiki/Quench
http://bondhus.com/metallurgy/body-5.htm
You will find many more links from google under 'quenching' and 'quenching steel'
2006-08-25 18:28:59 · answer #1 · answered by Robert A 5 · 2⤊ 0⤋
When you rapidly cool a hot metal you produce a different grain structure compared to a slow cooling. Rapid cooling is called quenching.
A good experiment to do is to take hair pins and heat them up with a propane torch for about 30 seconds. This is allows the grains to be reformed in the metal. Next, let some of them cool normally in the air, and quench some in ice water. Then try to break the pins. The ones that were quenched will snap, the ones that were cooled slowly will bend for a long time without breaking! This has to do with the grain structure of the metal.
When you quench it, you get large grains. When you cool it slowly, you allow more time for many small grains to form. Metal is harder to break as you increase the number of grain boundaries, so more smaller grains make the metal more resistant to breaking, since there are more grain boundaries.
2006-08-25 06:03:17 · answer #2 · answered by Duluth06ChE 3 · 0⤊ 1⤋
You get the T1000 liquid metal Terminator!!!
2017-03-24 20:16:10 · answer #3 · answered by James 1 · 0⤊ 0⤋
It's called forging. Usually strengthens and tempers the metal. A method employed in medieval times to fortify metal used in swords and other weaponry.
2006-08-25 05:59:41 · answer #4 · answered by rohannesian 4 · 0⤊ 0⤋
blacksmiths do this to cure the metal. it makes the iron harder. do a google search on blacksmith techniques or go to a ren fair and talk to a blacksmith
2006-08-25 05:57:54 · answer #5 · answered by shiara_blade 6 · 0⤊ 0⤋
Breaking the structure?
2006-08-25 05:59:40 · answer #6 · answered by JAMES 4 · 0⤊ 0⤋
the metal becomes harder! haha.. it's like in the fantastic 4 movie
2006-08-25 07:21:28 · answer #7 · answered by wills 3 · 3⤊ 0⤋
it expands and contracts rapidly according to the shape u want it
2006-08-25 06:11:08 · answer #8 · answered by smiley 2 · 0⤊ 0⤋
You will change the surface cyrstalline structure.
For steel, it will becomes harder but more ductile.
2006-08-25 06:00:02 · answer #9 · answered by Anonymous · 0⤊ 0⤋
it gets child
2006-08-25 05:57:06 · answer #10 · answered by lins 4 · 0⤊ 5⤋