08-20-2009, 03:46 AM,
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Stephen Booth
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Posts: 268
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RE: feed screw reinforcing
Arturas, interesting question, one we face on a daily basis. Obviously you understand well the pluses and minuses of each process, so I will not go into that. In my experience, the process selected for this application (maybe a MDF feedscrew), will depend on the end user operational controls. Meaning, if the end user, the customer, will operate the screw in more or less constant condition, with little foreign material like rocks, gravel, or overloading the screw, then I think a Thermal Spay Coating, liike the 861004 would be excellent, and so much easier to apply.
However, if the customer cannot guarantee the operation of the screw, then I would use the spray fuse coating, or plasma welding, or laser cladding. In some cases we even use the Corded WC brazing material coupled with a spray fuse, trying to match up the WC size to the abrasive particle.
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08-20-2009, 07:57 AM,
(This post was last modified: 08-20-2009, 07:58 AM by Arturas.)
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Arturas
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Posts: 73
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RE: feed screw reinforcing
(08-20-2009, 03:46 AM)Stephen Booth Wrote: Arturas, interesting question, one we face on a daily basis. Obviously you understand well the pluses and minuses of each process, so I will not go into that. In my experience, the process selected for this application (maybe a MDF feedscrew), will depend on the end user operational controls. Meaning, if the end user, the customer, will operate the screw in more or less constant condition, with little foreign material like rocks, gravel, or overloading the screw, then I think a Thermal Spay Coating, liike the 861004 would be excellent, and so much easier to apply.
However, if the customer cannot guarantee the operation of the screw, then I would use the spray fuse coating, or plasma welding, or laser cladding. In some cases we even use the Corded WC brazing material coupled with a spray fuse, trying to match up the WC size to the abrasive particle.
[/q[/u]
[quote='Stephen Booth' pid='3772' dateline='1250736414']
Arturas, interesting question, one we face on a daily basis. Obviously you understand well the pluses and minuses of each process, so I will not go into that. In my experience, the process selected for this application (maybe a MDF feedscrew), will depend on the end user operational controls. Meaning, if the end user, the customer, will operate the screw in more or less constant condition, with little foreign material like rocks, gravel, or overloading the screw, then I think a Thermal Spay Coating, liike the 861004 would be excellent, and so much easier to apply.
However, if the customer cannot guarantee the operation of the screw, then I would use the spray fuse coating, or plasma welding, or laser cladding. In some cases we even use the Corded WC brazing material coupled with a spray fuse, trying to match up the WC size to the abrasive particle.
uote]
As I see both coating could work. I asked customer about quantity of gravel in wood cutting. It takes about 1% , but also there is very big pressure to screw and abrasive wear fully dominate here.
I dont know what is better - to spray WCCrCo more easier and it will take less time but I am affraid due to coating spalling but at the same time to fuse coating on such screw with torches also is very complicate job (deformation and etc.)
If I spray WCCrCo what should be the thickness of coating ?
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