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roller surface high roughness Tungsten carbide coating Ra 0.15-0.3mm



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roller surface high roughness Tungsten carbide coating Ra 0.15-0.3mm
05-15-2018, 01:16 PM,
#1
zhuminkun Offline
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roller surface high roughness Tungsten carbide coating Ra 0.15-0.3mm
hello, every expertise, need your input or idea, how i can make roller surface roughness Ra 0.15-0.3mm

per my understanding, when we machine the roller we need to kepp 0.2mm Ra then this may happen. any ideas or procedure you can suggest will be 120% appreciate.
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05-15-2018, 02:49 PM,
#2
Vadim Verlotski Offline
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RE: roller surface high roughness Tungsten carbide coating Ra 0.15-0.3mm
(05-15-2018, 01:16 PM)zhuminkun Wrote: hello, every expertise, need your input or idea, how i can make roller surface roughness Ra 0.15-0.3mm

per my understanding, when we machine the roller we need to kepp 0.2mm Ra then this may happen. any ideas or procedure you can suggest will be 120% appreciate.

You need flame spraying or plasma spraying of a powder mixture of self-fluxing nickel-based alloy + tungsten-molten carbide (NiCrBSi + WC/W2C). If the grain size of your carbide is 0.2-0.5 mm, you will get a coating roughness of 0.1-0.3 mm.
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05-16-2018, 01:47 PM,
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zhuminkun Offline
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RE: roller surface high roughness Tungsten carbide coating Ra 0.15-0.3mm
(05-15-2018, 02:49 PM)Vadim Verlotski Wrote:
(05-15-2018, 01:16 PM)zhuminkun Wrote: hello, every expertise, need your input or idea, how i can make roller surface roughness Ra 0.15-0.3mm

per my understanding, when we machine the roller we need to kepp 0.2mm Ra then this may happen. any ideas or procedure you can suggest will be 120% appreciate.

You need flame spraying or plasma spraying of a powder mixture of self-fluxing nickel-based alloy + tungsten-molten carbide (NiCrBSi + WC/W2C). If the grain size of your carbide is 0.2-0.5 mm, you will get a coating roughness of 0.1-0.3 mm.

Tks Vadim, i will ask vendor to make some test samples.
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05-20-2018, 06:15 AM,
#4
demionkrishan Offline
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RE: roller surface high roughness Tungsten carbide coating Ra 0.15-0.3mm
Pre grinding-Pre honing - Chrome Plating- Final Grinding and Final Honing

or As Vadim mentioned below... flame spraying or plasma spraying of a powder mixture of self-fluxing nickel-based alloy + tungsten-molten carbide (NiCrBSi + WC/W2C)
Pre grinding -Flame / Plasma Spray- Final Grinding (Diamond wheel) and Super Polishing

How ever, If it is chrome plating you required Honing / fro Thermal Spray you need to do super polishing to achieve 0.1 Ra
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01-31-2019, 12:25 PM,
#5
Danmarco Offline
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RE: roller surface high roughness Tungsten carbide coating Ra 0.15-0.3mm
Hello, which mesh do you recommend to spray with hvof to achieve 250 micro inch Ra after spraying?
88WC 12CO powder
How do we prepare the surface?
We have to spray bridle rolls
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02-01-2019, 10:35 PM, (This post was last modified: 02-01-2019, 10:37 PM by Met.Eng..)
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Met.Eng. Offline
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RE: roller surface high roughness Tungsten carbide coating Ra 0.15-0.3mm
Hi zhuminkun,

You may spray with ArcSpray system under WC coating for high Ra Wink
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02-08-2019, 04:59 AM,
#7
Taz Offline
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RE: roller surface high roughness Tungsten carbide coating Ra 0.15-0.3mm
Is there any HVOF coating that we can get below Ra 2.0 mm?
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