question about the formation of metal bars/rods

[tw05baller]

when liquid metal is cooled to form a bar or rod, does the force of gravity pull the strength properties of the bar to the bottom? if so would there be a more efficient way to avoid this such as slowly spinning the bar as it cools?

ya ive been thinking about random stuff like this all day....

[Trainwreck2100]

the only way to kill liquid metal is to dumb it in scolding hot stuff

[BlackSwordsMan]

is there really a bar or do we think we see a bar?
this is no bar

[2Blonde]

Have you ever watched the show "How It's made"? Here's their website: How It's Made (http://www.commentcestfait.com/en/index.php) ... maybe they'll have your answer.

[RandomGuy]

when liquid metal is cooled to form a bar or rod, does the force of gravity pull the strength properties of the bar to the bottom? if so would there be a more efficient way to avoid this such as slowly spinning the bar as it cools?

ya ive been thinking about random stuff like this all day....

Ask a random question get a Random answer:

No. That is the best answer to your question as asked.

The properties of metals are, almost without exception, uniform throughout any given casting. The occasional exception would be severely adulterated, impure metal, with impurities that have very different densities from the rest of the mixture.

Metal is generally only useful in fairly pure forms, with the exception of alloys, but that is a whole other topic.

[tlongII]

Metal bars and rods evolved from liquid metal. It's evolution.

[mouse]

When you need answers, first ask MannyIsGod then use Google.

[DarkReign]

There are two kinds of processes used to make bar material.

Hot Rolled and Cold Rolled.

"Hot Roll" material is formed under the circumstances everyone thinks of. Molten metal, poured and cooled to specified outcome (flat stock or round stock of varying sizes), then rolled through extremely high tonnage hydraulic rollers to a desired outcome in size.

"Cold Roll" is almost the same exact process only the input temperature of the material being rolled is held below its scaling point (~1700 F). This creates a finer, more uniform grain structure, most often used in a machining role.

Both have their benefits and weaknesses, but by and large, Hot Roll is cheaper and more prone to structural imperfections (at the micron scale, mind you) while Cold Roll is slightly more expensive and dependable (unless your use involves a high-heat application, then you'd probably want to use a Hot Roll material due to it already being tempered by the rolling process).

...and I realized I didnt answer the question...

Which RG already nailed. The very nature of metal/heat interaction lends itself to a blending and "evening out" of the comparitively low diversity of the elements in steel. From the top to the bottom of the "boiling cauldron" is the same exact consistency and blend of material.

[mouse]

Metal bars and rods evolved from liquid metal. It's evolution.


Link?