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omcblacksmith · 11-04-2010, 01:57 AM

Im coating thermowells with sf1m 1/8" per side on 304hss,spray and fuse using standard J3 Wallcomony gun.Been doing for 30 years.Any ideas

***Gordon*** · 11-05-2010, 02:34 AM

Hi Omcblacksmith

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to the Surface Engineering Forum.

If you have been doing this successfully previously, something has obviously changed, maybe powder or process procedure. Try a different or fresh batch of powder or ideally a batch you have used before without problems, possibly a contamination problem or bad batch.

omcblacksmith · (This post was last modified: 11-06-2010 12:37 AM by omcblacksmith.)

(11-05-2010 02:34 AM)Gordon Wrote: Hi Omcblacksmith

to the Surface Engineering Forum.

If you have been doing this successfully previously, something has obviously changed, maybe powder or process procedure. Try a different or fresh batch of powder or ideally a batch you have used before without problems, possibly a contamination problem or bad batch.

Thanks Gordon.Thats what it was bad powder.