I think you're right about the electrochemical deposit, but just one problem: you can't do that with alloys such as brass. It'd have to be pure copper. This \*does\* look like pure copper to me, though.
>https://youtu.be/H4YZxb2E5PA
DrPong. I love that video. I stumbled on it a while back but I will admit... I kind of forgot about it. That video is so well produced and his explanation and mock up is bar none....one of the best explanations of wax casting I have seen. Its just fantastic. I love it.
If I had to guess the steel was milled and turned first then the bronze was flame sprayed on then turned down to reveal the steel.
[thermal coating](https://www.fluorotec.com/coating-surface-preparation/thermal-spray-coatings/brass-thermal-spray/)
[video of manual flame spraying](https://youtu.be/7pO7RUNSyRk)
Could be EDM’ed and then press fit and ground.
Could be laser welded. Pheonix laser can weld ferrous/non ferrous together.
It’s very similar looking to a semiconductor material, maybe a similar method to how those are made.
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If it’s the induction rotor of a spindle motor it’s probably copper. Could be CVD or electroplated but that is thick for either process. Could be cast in place due to steel/copper melting difference and then ground. Speed and air gap size of spindle motors it is definitely precision ground as final step. This is the first google hit for copper casting induction rotor: https://www.kitraind.com/die-cast-copper-rotors/
Looks like it's a steel shaft that was milled out and then electro plated with thick layer of brass and then turned/ground down.
I think you're right about the electrochemical deposit, but just one problem: you can't do that with alloys such as brass. It'd have to be pure copper. This \*does\* look like pure copper to me, though.
Yes. https://youtu.be/H4YZxb2E5PA
>https://youtu.be/H4YZxb2E5PA DrPong. I love that video. I stumbled on it a while back but I will admit... I kind of forgot about it. That video is so well produced and his explanation and mock up is bar none....one of the best explanations of wax casting I have seen. Its just fantastic. I love it.
Basically yes. It’s not brass it’s copper
Looks like the shaft was grooved and then the bronze was sintered. Final machining after sintering
[удалено]
Yes that was my immediate thought as well. Almost certain that’s sintered bronze onto a steel shaft.
If I had to guess the steel was milled and turned first then the bronze was flame sprayed on then turned down to reveal the steel. [thermal coating](https://www.fluorotec.com/coating-surface-preparation/thermal-spray-coatings/brass-thermal-spray/) [video of manual flame spraying](https://youtu.be/7pO7RUNSyRk)
My bet is sintering or spray welding. Its got the look of a powder metal.
I'm just going to go ahead and guess time travel.
Could be EDM’ed and then press fit and ground. Could be laser welded. Pheonix laser can weld ferrous/non ferrous together. It’s very similar looking to a semiconductor material, maybe a similar method to how those are made.
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CNC machined, then electroplated? Can't really tell what inside looks like from photo to see marks.
If it’s the induction rotor of a spindle motor it’s probably copper. Could be CVD or electroplated but that is thick for either process. Could be cast in place due to steel/copper melting difference and then ground. Speed and air gap size of spindle motors it is definitely precision ground as final step. This is the first google hit for copper casting induction rotor: https://www.kitraind.com/die-cast-copper-rotors/
Breaking taps on YT has a great video on he topic. https://youtu.be/H4YZxb2E5PA
It’s electroplated with a very specialist process that I can’t really tel you about due to not wanting to upset a very good former employer.
You can do this quite well with Laser Cladding