Poor flame with Ni-based metallic powder - HVOF process |
02-23-2016, 06:47 AM
(This post was last modified: 02-23-2016 06:52 AM by Roy.)
Post: #1
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Poor flame with Ni-based metallic powder - HVOF process
Hello, everyone.
I would like to hear your kind advice on the check points for solving poor flame of HVOF spray gun. I operates HVOF gun that uses LPG as fuel. When I tried to spray Ni-based metallic powder(Colmonoy 63HV, Particle size -63/20 um), it seemed powder feed rate was insufficient. Please see the inserted photo. When I checked feed rate, it was good - 45g/min. I adjusted oxy/fuel ratio to increase flame temperature, but there was no change. After trying WC(-45/+15 um) or Co-based metallic powder(-53/20 um), I found out that only Col 63HV had a poor flame problem. I think that the powder quality is okay. How could I get the proper flame with this metallic powder? Please advise me as to the check points or hints for trouble shooting. Yours truly, | |||
02-25-2016, 06:34 PM
Post: #2
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RE: Poor flame with Ni-based metallic powder - HVOF process
Hi Roy,
Powder JK 576 (Stellite 6, -53+10 microns) has quite a lot of fine fraction (< 20 microns), which be hot in the flame. For this reason, the flame be lighter and powder application be greater than in colmonoy 63HV, without any share of fraction < 20 microns. The powder colmonoy 63HV, Particle size -63/20 is simply too coarse for your HVOF system. | |||
02-26-2016, 12:30 AM
Post: #3
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RE: Poor flame with Ni-based metallic powder - HVOF process
(02-25-2016 06:34 PM)Vadim Verlotski Wrote: Hi Roy, Hi Vadim, Thank you for your kind advice~ | |||
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