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.
Posted by: Lazha - 12-06-2016 11:31 AM
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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?
Does anybody has good experiences for surface preparation for Cast Iron base materials, now our sand blasting (24#WA,4.5 bar air)process is not enough to increase surface situation, roughness of the substrate is not good, and seems contamination on the interface when check the metallographic after coating, so it is not for the bond strength, thanks!
Posted by: RobertW - 11-22-2016 02:29 AM
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I have the brass component (overall size 50mmx50mm1000mm) fixed in the machine. This brass component has hundreds of through holes of diameter 0.3mm each and 2.4mm deep.
I need to cover the brass with hard and low-abrasive protective coating (thickness approx. 10microns) that would has to be evenly distributed also inside those long and tiny holes (blockage of the hole with coating material is not acceptable).
The brass is heated to approx. 230degC, when the machine is in service.
The best technique that I have identified so far is the electroless nickel plating.
Would there be any another technology?
Posted by: Sulzerm - 11-21-2016 08:10 PM
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For sale in good condition used thermal spray gun. Metco type 5pII ThermoSpray or type 5p 2. $800 call or text 715-938-2848. Jeff. Between 7am and 9pm +6 gmt. I have photographs if requested. Email at email@example.com
Hello, Have anybody experience with spraying turbine components by HVOF? I saw that the blade was rotated on the rotating table and the gun moved from left to right with pitch up. if anyone of you apply the coating in a similar way? Depending on components size or coating thickess the whole spraying process may proceed to 30min or longer. Do you use cooling air during spraying? Or between the cycles? Regards
Posted by: Righter - 11-16-2016 12:41 PM
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I am looking into getting into thrmal spray.
I have two questions,
I want to know if there is a powder that can stand 2000 f in black color finish that can be sprayed in a system that is not plasma?
I want to offer a mirror finish (like chrome or nickel), is there a powder that can be finished in an automated process for complex parts like a vibretory polisher or other technology. (Not for exhaust systems)