Hv2000 or Top Gun with acetylene

[Intel55]

Anyone have parameters for using acetylene with an HV2000/Top Gun gun?? Does anyone use acetylene with an HV2000 gun?? Wondering if you can spray ceramics (Alumina) with an HVOF gun running "hot."


Thanks

[adam wintle]

I only have the hydrogen spray parameters. Wear resistance is mean't to better than plasma. You also need a -20/+5 micron powder.

Adam

[Intel55]

still looking

found a couple citations on the process, but cannot find the actual article.

Here are the two references in case anybody has them

Kreye, Zimmermann and Heinrich "The Role of the Fuel Gas in the HVOF Process" in Thermal Spraying:current Status and Future Trends, C.C. Berndt, ed., High Temperature Society of Japan ,1995, pp. 393-398.

Cole and Walker: "High Temperature Erosion Properties of Thermal Barrier Coatings Produced by Acetylene Sprayed High Velocity Oxygen Fuel Process" in Thermal Spray, Surface Engineering via Applied Research, ASM International, 2000, pp. 1191-99.

[Stephen Booth]

There are parameters for the acetylene with Ceramic materials. You might try contacting k.nassenstein@gtv-mbh.de GTV holds the Top Gun License in Europe I believe

[Intel55]

Thanks for the info. I will email him and hope that he is willing to give out some info.

So far the only parameters I have been able to find are for the "theta" gun spraying Al2O3. Never even seen or heard of that gun before.

o2: 898 l/min
Kero: 0.32 l/min
acetylene: 43 l/min
standoff: 150mm

[jeffsays163]

DJ2700 of Sulzer Metco has a special nozzle or air cap, and powder feeding hose only for spraying AL2O3. Sulzer even researched the Al2O3 HVOF coating by DJ2700 years ago. But as far as I know they concluded such a coating dos not show any prevalence technically and economically as compared with APS.

[Intel55]

DJ2700 of Sulzer Metco has a special nozzle or air cap, and powder feeding hose only for spraying AL2O3. Sulzer even researched the Al2O3 HVOF coating by DJ2700 years ago. But as far as I know they concluded such a coating dos not show any prevalence technically and economically as compared with APS.

I know the TopGun can do it, with the addition of acetylene. HV200 do it with some addition plumbing for acetylene, something similar to that Theta gun. HV2000 with prop and hydrogen as well. A DJ2600(using propylene and hydrogen) and JP5000 can spray it as well. The JP had the lowest temperature and the alumina was only molten, but the velocity was able to overcome that, making the coating very dense, very low porosity, better than plasma if I recall correctly.

The shop I know is going over published studies instead of doing trial and error again, which was getting costly for them

[Stephen Booth]

I heard that the coatings of Cr2O3 done with the Top Gun Acetylene were excellent in quality, superior to APS.

On a side note, at one time (1992) OSU Germany produced an HVOF Rod Spray, similar to the Rokide, but HVOF one of the guns is still in a warehouse here of the old OSU Distributor in Indonesia.

The Rokide torch, with the Rokide C Rod produces excellent quality wear resistant coating, but the material cost is high...

DJ2700 of Sulzer Metco has a special nozzle or air cap, and powder feeding hose only for spraying AL2O3. Sulzer even researched the Al2O3 HVOF coating by DJ2700 years ago. But as far as I know they concluded such a coating dos not show any prevalence technically and economically as compared with APS.

I know the TopGun can do it, with the addition of acetylene. HV200 do it with some addition plumbing for acetylene, something similar to that Theta gun. HV2000 with prop and hydrogen as well. A DJ2600(using propylene and hydrogen) and JP5000 can spray it as well. The JP had the lowest temperature and the alumina was only molten, but the velocity was able to overcome that, making the coating very dense, very low porosity, better than plasma if I recall correctly.

The shop I know is going over published studies instead of doing trial and error again, which was getting costly for them

[Destin]

Anyone have AMDRY 1718 Powder parameters for hydrogen fuel gas using HV2000/Top Gun gun?

[asinmaz]