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What happens to steel when you melt it and then re-solidify it?
The Ender
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Registered User regular
Say you were to take a bar of steel, melt it to a liquid state, pout it into a mold and let it re-solidify / harden.
...Is it going to have more or less the same strength & properties it had before it melted? Or will melting it reduce fundamentally alter it's characteristics in some way?
...Is it going to have more or less the same strength & properties it had before it melted? Or will melting it reduce fundamentally alter it's characteristics in some way?
With Love and Courage
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There are entire books in the engineering field written about how the properties of steel are defined by the temperatures at which it is forged and cooled, not to mention what other elements the iron is alloyed with.
Let 'em eat fucking pineapples!
I don't know the details, because I was a kid, but I remember the general principle.
the "no true scotch man" fallacy.
If you were to take a piece of carbon steel and melt it then let it cool, you would end up with a porous mess of steel, with different properties than the original. However, there are different processes, such as welding, which involve the melting and re-solidification of metal. In most cases a barrier is created to prevent the liquid metal from contacting any atmosphere. Sometimes it is done with a solid flux, other times it is done with a gas barrier, such as helium, argon or CO2. Though, the weld is typically harder than the metal substrate.
Metalurgically, I cannot tell you the reasons for this. I work in the ornamental metals business, and have spent quite a bit of time working with steel and various other metals.
Feral:
That process is most likely the hardening/tempering stage when the material is brought to critical temperature then rapidly quenched in an oil or water bath to force a phase change in the iron alloy. By changing the phase of the iron alloy you are able to control the distribution and structure of the material into a phase that gives you desirable qualities (hardness, durability, etc). This process is usually well below the melting temperature of steel, but like previously mentioned it can greatly change the properties of the material without changing the alloy.
Welding is different because it's limited movement and it's mixing with stiffer material and it actually makes the material more brittle.
Satans..... hints.....