HVOF vs Spray and Fuse
02-13-2020, 04:22 PM,
#1
HVOF vs Spray and Fuse
Hello

Which one has better bonding strength?
Are there any studies??

Thanks
Reply
02-13-2020, 04:30 PM,
#2
RE: HVOF vs Spray and Fuse
Hi Danmarco

Spray and fuse will have a very much higher bond strength.

Reply
01-10-2023, 06:04 AM,
#3
RE: HVOF vs Spray and Fuse
What is the calculated bond strength of NiCrBSi coating fused on a ferrous substrate.

Could a 3 lug guided sheer test provide some data.

I have always worked on the basis of 60,000 PSI
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01-10-2023, 06:46 AM, (This post was last modified: 01-10-2023, 06:54 AM by Vadim Verlotski.)
#4
RE: HVOF vs Spray and Fuse
Hello Stephen,
From what I've learned from working with NiCrBSi, the bond strength, which also equals the tensile strength of this material, is less than 45,000 PSI (< 310 MPa). This is due to the fact that fused NiCrBSi has large, closed pores, which severely limit its strength.
By the way, you can measure the adhesive strength and tensile strength of the fuse NiCrBSi layer directly in a tensile test by coating two steel stamps with the NiCrBSi and then sintering them together in a vacuum furnace.
Reply
01-10-2023, 08:05 AM,
#5
RE: HVOF vs Spray and Fuse
thank you Vadim Verlotski
Reply




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