The Shop > Metal Stuff
Aluminum Copper Alloy Experiment
NormanV:
Ok, thanks for the quick response Andrew. When it's cooled down enough to handle I'll put it back in the kiln to heat treat it and try machining it this evening.
NormanV:
Well, I did the heat treatment, I heated it until it just started to melt and then dunked it in water.
I machined it today, it cut quite well but I noticed that the surface that I achieved was not as good as the sample that Steve showed earlier in this thread. On close examination I saw that I am getting lots of tiny bubbles. I have said previously that I do not de-gas. Next time I melt some metal I will try it to see if it makes a difference for me.
Biggles:
If you really want a hard alloy try Beryllium with Copper. It’s used to cover expensive golf clubs and can be used for armour piercing bullets!
NormanV:
I did a little experiment today, not precise but it gave a ball park comparison of the aluminium/copper alloy and the normal alloy that I use that is car wheels melted down.
I used a centre punch and a club hammer. I arranged it so that the club hammer dropped a repeatable distance onto the centre punch and then measured the resulting punch mark using a magnifier. The copper alloy gave a punch mark 1mm dia and the plain alloy 2mm dia.
I can deduce from this that the addition of copper results in a harder alloy. :)
awemawson:
:clap:
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