Summary for grinding hvof coatings Discussion
Grinding HVOF coatings usually calls for diamond tooling, not conventional abrasive wheels. In the early replies, Vikram Dogra said a conventional grinder with a large-diameter, narrow diamond wheel will cut carbides effectively, while standard wheels waste time and wear out the machine. Guillermo Marrufo also emphasized that carbide is very hard and needs diamond to cut it. Years later, Hamid H asked about reducing roughness below Ra 2 on tungsten carbide and chrome oxide HVOF coatings; the thread response again pointed to special diamond-edged cutters. When John Bevil asked about belt grinding for aerospace work, AF Kenton replied that HVOF coatings require a diamond wheel and a stiff machine, and said belt grinding won’t fit the bill. Vikram Dogra later noted that diamond belt grinding for HVOF coatings has existed for many years. The discussion consistently favors diamond-based grinding, with machine stiffness and process control important to avoid vibration and rough surfaces.
Hello Everyone! I was just checking diamond wheel for grinding WC coatings, and I got a lot of stuff from internet but this conversation is going on from 18 years, I thought it would be nice to join you and say Hello! 🙂
Abhishek Tiwari
R&D – AHMEDABAD [India]
August 13, 2022
⇩ Similar, related, Q&As — oldest first ⇩
Q. We want to cylindrical grind thermally sprayed HVOF coatings(chromium carbide and tungsten carbide). In a second case the coating is to be flush ground with metallic uncoated steel(SS 316 or hardened EN24)
If anybody can suggest suitable grinding wheel, tips, techniques. Expert and experienced advice will be highly appreciated.
Vikram Dogra
Irusha India – Chandigarh, India
THERMAL SPRAY JOB SHOP – CHANDIGARH, India
2004
A. Conventional grinder equipped with large diameter, narrow diamond wheel will cut carbides as butter. Otherwise if you use standard wheels, you will be wasting valuable time, wheel and the machine will suffer a lot to cut through it.
Guillermo Marrufo
Monterrey, NL, Mexico
A. Of course carbide is very hard and you need diamond to cut it.
I’m HVOF experienced operator, I would like to know more about your question to help you
Hamid H
– Bezier, France
March 2, 2008
Q. We are providing services of HVOF coating of tungsten carbide & chrome oxide; we are facing vibration and rough surface during grinding. Can anyone recommend the best grinding or polishing wheel to get the roughness of the surface below Ra 2.
Muhammad Karam
Abahsain Group – Alkhobar Saudi Arabia
March 4, 2018
Ed. note: Gentle readers — Feel free to suggest types of grinding or polishing wheels — but not brands or sources ( huh? why?)
A. When we grind TCC we use special diamond edged cutters. We are fortunate that a company around the corner from us makes these up especially for us, but I’m sure similar products exist in the market.
Oliver Gwynne
B&B precision – Huddersfield, west yorkshire, UK
 |
Something I’d love to see would be for one of the elementary school students who posted a science project question in the early days to return and tell us they’ve earned their doctorate 🙂 Regards,
May 2018 |
Q. Thanks for the reply OLIVER.
Could you give ref of this company manufacturing DIAMOND EDGED CUTTERS for you, or their website so that I could understand the product better.
Thanks in advance
Vikram Dogra
Irusha India – Chandigarh, India
July 13, 2018
Ed. note: This RFQ is outdated, but technical replies are welcome, and readers are encouraged to post their own RFQs. But no public commercial suggestions please ( huh? why?).
Q. What about using “Belt Grinding”? I have heard that using belt grinding can cut the grinding times by at least 50% and will not burn the substrate. We are in the aerospace industry and this is one of our main concerns of grinding.
Thanks.
John Bevil
– Montreal, Quebec, Canada
August 31, 2018
 | A. The answer to your question depends on a number of factors. Heat is the main problem with belt sanding. Also if your RMS is over 35 then you may want to consider some belt grinding.
A. While hard chrome is usually ground with an aluminum-oxide or silicon-carbide grinding wheel, the hardness of HVOF coatings requires that they be ground with a diamond wheel. As a result, the grinding machine requires higher static and dynamic stiffness. The diamond wheel itself requires a higher threshold force to make it work. Belt grinding won’t fit the bill. Oliver Gwynne |
TOTALLY AGREE WITH OLIVER.
Vikram Dogra
Irusha India – Chandigarh, India
A. Diamond belt grinding (for HVOF coatings) has been around for many years.
Stephen Booth
shop employee – Singapore
February 12, 2022