Discontinuities on HVOF surface
05-27-2014, 02:51 PM, (This post was last modified: 05-27-2014, 03:01 PM by Gabriel AM.)
#1
Rolleyes  Discontinuities on HVOF surface
Hi All,

I need some help to understand the pictures attached, we observe a diagonal stacking pattern, some cracks and material not fused, but this pattern is present only in the second application. We try differents parameters but there are no important changes.
Gordon, I sent by email the picturesBig Grin
Many thanks for your support.

Gabriel
Reply
05-27-2014, 04:33 PM,
#2
RE: Discontinuities on HVOF surface
Hi Gabriel

Sign0016 to the Surface Engineering Forum.

Could you gives us more information on your process/part set-up and materials?

Your images below:


[Image: sample1.jpg]

[Image: sample2.jpg]

[Image: sample3.jpg]


[Image: sample4.jpg]

[Image: sample5.jpg]

[Image: sample6.jpg]

[Image: sample7.jpg]
Reply
05-28-2014, 09:24 PM, (This post was last modified: 05-28-2014, 09:31 PM by KevinS.)
#3
RE: Discontinuities on HVOF surface
(05-27-2014, 02:51 PM)Gabriel AM Wrote: Hi All,

I need some help to understand the pictures attached, we observe a diagonal stacking pattern, some cracks and material not fused, but this pattern is present only in the second application. We try differents parameters but there are no important changes.
Gordon, I sent by email the picturesBig Grin
Many thanks for your support.

Gabriel


The cracking in the 2nd and 3rd images appear like what happens when either you hot mount with too much pressure (keep the pressure under 300 psi) or gring with too much speedand pressure. The structure is a different issue.


(05-27-2014, 02:51 PM)Gabriel AM Wrote: Hi All,

I need some help to understand the pictures attached, we observe a diagonal stacking pattern, some cracks and material not fused, but this pattern is present only in the second application. We try differents parameters but there are no important changes.
Gordon, I sent by email the picturesBig Grin
Many thanks for your support.

Gabriel

Reply
05-29-2014, 08:22 PM,
#4
RE: Discontinuities on HVOF surface
Sorry, The cracking in the 2nd and 3rd images appears to be what happens when either you hot mount with too much pressure (keep the pressure under 3000 psi) or grind with too much speed and pressure. The structure is a different issue.




(05-28-2014, 09:24 PM)KevinS Wrote:
(05-27-2014, 02:51 PM)Gabriel AM Wrote: Hi All,

I need some help to understand the pictures attached, we observe a diagonal stacking pattern, some cracks and material not fused, but this pattern is present only in the second application. We try differents parameters but there are no important changes.
Gordon, I sent by email the picturesBig Grin
Many thanks for your support.

Gabriel


The cracking in the 2nd and 3rd images appear like what happens when either you hot mount with too much pressure (keep the pressure under 300 psi) or gring with too much speedand pressure. The structure is a different issue.


(05-27-2014, 02:51 PM)Gabriel AM Wrote: Hi All,

I need some help to understand the pictures attached, we observe a diagonal stacking pattern, some cracks and material not fused, but this pattern is present only in the second application. We try differents parameters but there are no important changes.
Gordon, I sent by email the picturesBig Grin
Many thanks for your support.

Gabriel

Reply




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