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samp
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Bluing

01/05/2011 11:46 PM

Can you guide how the parts can be blued(bluing operation)? (Bright / dark blue colour)
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34point5
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#1

Re: Bluing

01/06/2011 5:28 AM

Do you mean as in rifle, or as in heat treatment of steel, or titanium, etc, or as in anodizing aluminium

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samp
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#2
In reply to #1

Re: Bluing

01/06/2011 5:48 AM

as in heat treatment of steel
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34point5
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#3
In reply to #2

Re: Bluing

01/06/2011 6:54 AM

My preferred method for an even blue is to place the (re-polished) part/s on a larger block of 'barely red' steel and let it "soak" in, or through, or up.

Some practice is required to estimate how red by what mass, makes what thickness/mass arrive at the right shade of blue.

Fine wire, or mesh, is handy as a stand off, if the work is of large mass, so requiring a 'hotter' base block.

This method will also produce even 'straw', which is quite difficult with direct flame techniques.

Having arrived at the desired colour, quench in oil to freeze the temper.

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CaptMoosie
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#4

Re: Bluing

01/07/2011 11:03 AM

34point, your answered impressed me. GA for you!

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CaptMoosie
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#5

Re: Bluing

01/07/2011 11:05 AM

Opppps, a typo....all "thumbs" this morning...need more coffee!

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samp
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#6

Re: Bluing

01/11/2011 2:25 AM

procedure and chemicals for Bluing in chemical at a certain temperature (or may be at room temperature).

not to be hot on hot plate or by flame.
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34point5
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#7
In reply to #6

Re: Bluing

01/11/2011 3:10 AM

Oh - ok - so you do mean as in rifle.

Go to your local, or online, gun shop and ask for "gun blue".

It comes with instructions.

It is a bit nasty, so disposable gloves and ventilation are good ideas.

You may need to boil parts, in bags with chemicals, in a water filled vessel (depends on the system)

You will need a 'finishing oil' for the process, which has some impact on 'maturing the color'.

However; though I do it for repairs and the odd restoration, I'm sure there are a bunch of more expert 'mericans just busting to tell exactly what to buy and how to do it best.

And just quietly, I wouldn't mind listening to that.

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samp
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#8

Re: Bluing

01/13/2011 12:53 AM

Can you suggest, what is the process sequence and what chemicals to be use.
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