| SS print slightly magnetised [message #47962] Sun, 06 May 2012 20:26 UTC |
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I was posing my latest prints (very small 1:200 scale car models) for photographing when I noticed that they would occasionally move to touch each other.
They seem to have arrived from SW with a small amount of magnetism. I understand from a previous thread that this steel can sometimes retain a magnetic 'memory' but I'd like to know if there are any steps taken to avoid this.
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| Re: SS print slightly magnetised [message #47963 is a reply to message #47962 ] Sun, 06 May 2012 20:47 UTC |
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Heat it above the curie temperature* to lose the magnetism.
Curie temperature = the temperature needed to make the material lose magnetism
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| Re: SS print slightly magnetised [message #48050 is a reply to message #47963 ] Tue, 08 May 2012 15:23 UTC |
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Heating it that high is really going mess up the finish. The best way to do this would be with a de-magnetizing or degaussing device. Cheap ones are available from hobby or electronics suppliers used for demagnetizing screw drivers etc. These are nothing but a set of magnets held in a plastic frame, cost about $10. Or, if you have a tape head demagnetizing wand left over from your ancient tape recorder days?
Even dropping your models several times on a hard surface will likely demagnetize them.
-G
"Where the spirit does not work with the hand, there is no art."
Leonardo da Vinci
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| Re: SS print slightly magnetised [message #48054 is a reply to message #47962 ] Tue, 08 May 2012 16:02 UTC |
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Thanks for your degaussing suggestions, the magnetism is very slight, so I'm probably not going to do anything about it.
Mostly I was intrigued to know if this was an effect other people had noticed and whether it was a known side-effect of the printing process and if it was then whether SW did anything about it.
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| Re: SS print slightly magnetised [message #48057 is a reply to message #48054 ] Tue, 08 May 2012 17:00 UTC |
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Straight out of the furnace I have not seen parts come out in a magnetized state. However, place a SS print near a strong magnetic field, even just touch a rare earth magnet to it, and presto change'o. This is usually not a problem unless you are trying to hand ploish a part or if parts are in service near fine iron fillings or dust. Easy enough to reverse though.
-G
"Where the spirit does not work with the hand, there is no art."
Leonardo da Vinci
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