Piano wire

[peglegpog]

Can anything be done, having silver sodered piano wire, so that the wire will retain its` original properties? I have tried quenching in water but it did not seem to make much difference.
Peglegpog.

 

[swall]

No, you're out of luck. Piano wire, like music wire, is "patented" to produce a fine pearlitic structure. This involves quenching in a lead bath at around 800F.When you silver braze this material, you are re-austenitizing it and unless you have access to a lead bath, you will be unable to duplicate the cooling necessary to get the patented structure back. By water quenching, you are reverting to a martensitic structure and the end product would be more like a tempered wire product, not piano wire.

 

[swall]

Forgot to mention that music wire/piano wire is cold drawn after patenting and you wouldn't have any way of performing that operation to get back to the original properties.

 

[strokersix]

peglegpog,

What are you attempting to do with the wire?

 

[unclesyd]

You might want to take a look at high carbon, properties achieved through heat treatment, wire instead of music wire.

http://www.mjwire.com/mjw_rocket.html

 

[EdStainless]

Yes, our friend Rocket Wire. High carbon and still requires a draw after heat treatment to reach the properties.
I loved the carbon steel wire business. You could work from one rod chemistry and by playing with heat treatment and draw combinations you could make 6 different products.


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Corrosion never sleeps, but it can be managed.

http://www.trenttube.com/Trent/tech_form.htm

 

[unclesyd]

They have other wires that maybe suitable, it just so happened that my older favorites was directed at that page as we used this for a taut line vessel measuring device among others.

We used several wires that were hard soldered without additional heat treatment, but that was in the days of good old cadnium based solders and and brazing rods.

 

[swall]

EdStainless--I was of the impression that Rocket Wire was a jazzed up music wire and was a patented/drawn product of ultra high tensile strength and not a Q&T wire product.

 

[EdStainless]

Spring wire, music wire and oil tempered (OTMB) were all made from the same rod.
Rocket was made from higher carbon rod, and while the heat treatment was similar the tempering was different.
I don't recall the exact sequence of heat treatment and reductions.

I do recall testing it. You had to check the modulus, we used optical for extension. It was drawn so hard that you could screw up the modulus. You also had to take elongation from the crosshead movement of the tensile machine. The tensile samples never fit back together after fracture because so much material was missing. There was dust everwhere after a test.

= = = = = = = = = = = = = = = = = = = =
Corrosion never sleeps, but it can be managed.

http://www.trenttube.com/Trent/tech_form.htm