Thread: metal color change
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Randy Replogle Randy Replogle is offline
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Default metal color change
wrote:
I need some advice.

I am taking stamped metal parts (nickel silver) and heating them up to
about 450 - 500 degrees. Many of them change color from a shiney
silver to a bluish color. This is the effect I want.

Lately, many of the parts are not changing color. When stamped, we
use a light coating of kerosene for die lube. Sometimes we run fairly
dry.

IS the color change a result of the light kerosene? Is it a function
of temperature? What can I do to ensure that all the parts turn
bluish?

Thank You,


Wayne


Clean them. Maybe the oil is keeping the metal from oxidizing?
Randy
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