Posted by: hereticgame - 01-02-2017 10:35 AM
- No Replies
I need an help in how to remove lines appearing between mount and coating in microstructure taken in 200X .
Powder used is stellite-12(HVOF spray)
Polishing method : Final polishing usind DAC (0.5-1micron diamond paste)
Note: If i replace the final polishing method using Chem pad and OPS solution then i dont get lines which i got using diamond paste (Water soluble)
I have a question on the tolerance capability level for thermal spray processes
.I would like to know, what is the best tolerance (i.e. +/- 0.00x) that can be achieved with HVOF or Air Plasma?
For my process
1. APS - I could achieve a deposition rate in the range of 0.001"~0.003" per pass.
2. HVOF - I could achieve a deposition rate in the range of 0.00025 ~0.0005
Any information would be appreciated!
I'm having trouble to reveal a true microstructure of Al12Si (arc wire sprayed). I believe porosity level more than it should, anyone has any polishing method for this coating?
Any help is greatly appreciated, Thanks
This AlSi (Aluminium 12% Silicone) top coat is applied onto NiAl bond coat (Dual Wire Electric Arc Coatings)
I have plunger which surface it is necessary to be rebuild with fully corrosion resistant coating. Coating thickness should be from 0,5 up to 1,5mm (There is different wear depth). Hardness should be 30-40HRC. Working conditions - pressure about 70atm, water, it works in pair with bronze B10 hub. Dimensions of plunger - diameter about 500mm length 10000mm.
I think about electric arc wire spray process and material SS420 ... but influence of porosity.... and how it works with bronze I don't know. Does anyone have ideas, experience....?
doe any one have experience in welding HVOF coated turbine parts.
we are facing coating separation after welding.
please find attached a photo of the same.
The part is coated with stellite 6 HVOF.
your inputs will be highly appreciated
I've invented a prototype of a guitar pick. I've had a friend fashion it for me and I've shaped it and finessed.
The original metal is a mystery. It's too soft and after use it results in a black dust on my fingers. Even after a few minutes. So it was great to produce my prototype as it was mailable but now I need to get it reproduced.
I'm a complete novice so I'm open to any suggestions of steel that is common in production. I want a regular low cost type for reproduction but I'm open to also having a delux model like titanium too.
I'm sure there are many grades and mixes out there. I need something that can last to within reason. That can handle the application of playing guitar without residue. Without creating filings that the pickup magnets will gather. That won't create a lot of friction and wear strings too fast. If it is dragged down strings in a pick slide I don't want it to create indents in the pick. Although that may be something impossible to avoid. Scratched up is fine but gouges I want to avoid.
Grip is important for live so I need half of it to be etched etc. I'm also thinking of sweat/live and coming up with a resin to react to body heat and sweat to make it tacky.
So what should I tell the manufacturer? I'm about to send my prototype.
They said they can send me 5 different metal types...what should I ask for? I thought I could let them decide from their experience but if you guys can suggest something I'd appreciate it. Nothing too exotic/bleeding edge. Haha. I need a regular tooling factory to have access to it.
What would you interpret an almen intensity requirement such as 20N. Will it mean a 0.02 in deflection or 0.2mm deflection in almen N?
The reason I am asking is a requirement on a HVOF tungsten carbide coating, diamalloy2004 is asking for an intensity 0f 20N, with coating thickness of 0.23-0.30 mm.
I am having difficulty to achieve this requirement, as most of the intensity that I get is typically 0.25 range...Even AMS2448 seems to be within this range of intensity. Anyone can share if they can actually achieve 0.2in (0.508mm) instead?