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Old 07-02-2006, 11:26 AM
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what is exactly magna flux?

i have heard this word alot when people are rebuilding engines, what is it? i know you do something to block,crank ,rods.

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Old 07-02-2006, 11:46 AM
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they put some kind of powder on the block and run an electric current through the block to show any cracks? guys please correct me if im wrong
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Old 07-02-2006, 11:47 AM
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Quote:
Originally Posted by chevelle4542speed
i have heard this word alot when people are rebuilding engines, what is it? i know you do something to block,crank ,rods.

K.I.S.S.
Passing a magnetic field through the part and sprinkling a fine iron dust on the part which will stick to any crack (and not to the rest of the part).

There are different techniques for doing this such as a big horseshoe magnet or even a large electromagnet.

There are also methods that use an ultraviolet dye or even a spray can chemical dye to detect crack.
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Old 07-02-2006, 12:15 PM
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Quote:
Originally Posted by xntrik
K.I.S.S.

There are also methods that use an ultraviolet dye or even a spray can chemical dye to detect crack.
That is called dye penetrant test..it uses a dye and a black lite to show any cracks of defects..

Do a google for non-destructive materials testing and one will come up with alot of info..

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Old 07-02-2006, 12:51 PM
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does it make the metal stroger or just fixes the cracks
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Old 07-02-2006, 12:51 PM
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Magnifluxing

I was under the influence that the mag field didn't flow through the crack, there for making what looked like a line where the crack was. When the mag field was removed, the powder will fall off. It also helps if the idem has been cleaned.
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Old 07-02-2006, 01:09 PM
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it is just to spot the cracks ps i was close
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Old 07-02-2006, 01:14 PM
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Quote:
Originally Posted by chevelle4542speed
does it make the metal stroger or just fixes the cracks
.
It doesnt fix anything. As OneMoreTime said, it's one of many non desttructive tests you can use to tell you the condition of the part you're wanting to use.
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Old 07-02-2006, 01:24 PM
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Magnaflux particle inspection is a very simple process. It is used on ferrous (magnetic) parts to find cracks and flaws. It does nothing to repair the part, but only to find cracks and fractures in iron and steel parts.

The part that is being magnafluxed is magnetized temporarily and then iron powder is either sprayed onto the part or it is washed onto the part in a special solvent.

Many cylinder heads are inspected with a simple permanent type magnet and a small dry powder sprayer. The iron powder aligns itself along any cracks and makes them readily visible.

Larger parts like blocks or cranks are normally placed in a magnaflux cabinet, and magnetized by a large electro-magnet. A solution of solvent that contains iron particles that will glow under a black light are washed on the part, the booth has a curtain, and even the smallest of cracks can be found by a skilled inspector.



Aluminum and other non-ferrous parts are inspected via xyglow inspection or dye penetrant. They can also be pressure checked.
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