Need help with microstructure
01-02-2017, 10:35 AM,
#1
Need help with microstructure
Hello Everyone!
I need an help in how to remove lines appearing between mount and coating in microstructure taken in 200X .
Powder used is stellite-12(HVOF spray)
Polishing method : Final polishing usind DAC (0.5-1micron diamond paste)
[Image: 200x.jpg]

Note: If i replace the final polishing method using Chem pad and OPS solution then i dont get lines which i got using diamond paste (Water soluble)

Any help would be great .......... Thanks
Reply
03-08-2017, 04:47 AM, (This post was last modified: 03-08-2017, 04:48 AM by KevinS.)
#2
RE: Need help with microstructure
(01-02-2017, 10:35 AM)hereticgame Wrote: Hello Everyone!
I need an help in how to remove lines appearing between mount and coating in microstructure taken in 200X .
Powder used is stellite-12(HVOF spray)
Polishing method : Final polishing usind DAC (0.5-1micron diamond paste)
[Image: 200x.jpg]

Note: If i replace the final polishing method using Chem pad and OPS solution then i dont get lines which i got using diamond paste (Water soluble)

Any help would be great .......... Thanks
The grinding steps between your initial course grind and the final find grind are either missing steps or are lacking in time, Suggest you either add steps or increase time as all you are seeing is left over damage from a coarse grinding operation. This is assuming your pressures are about 20-25N.



(01-02-2017, 10:35 AM)hereticgame Wrote: Hello Everyone!
I need an help in how to remove lines appearing between mount and coating in microstructure taken in 200X .
Powder used is stellite-12(HVOF spray)
Polishing method : Final polishing usind DAC (0.5-1micron diamond paste)
[Image: 200x.jpg]

Note: If i replace the final polishing method using Chem pad and OPS solution then i dont get lines which i got using diamond paste (Water soluble)

Any help would be great .......... Thanks

Reply
04-11-2017, 07:40 AM,
#3
RE: Need help with microstructure
(03-08-2017, 04:47 AM)KevinS Wrote:
(01-02-2017, 10:35 AM)hereticgame Wrote: Hello Everyone!
I need an help in how to remove lines appearing between mount and coating in microstructure taken in 200X .
Powder used is stellite-12(HVOF spray)
Polishing method : Final polishing usind DAC (0.5-1micron diamond paste)
[Image: 200x.jpg]

Note: If i replace the final polishing method using Chem pad and OPS solution then i dont get lines which i got using diamond paste (Water soluble)

Any help would be great .......... Thanks
The grinding steps between your initial course grind and the final find grind are either missing steps or are lacking in time, Suggest you either add steps or increase time as all you are seeing is left over damage from a coarse grinding operation. This is assuming your pressures are about 20-25N.



(01-02-2017, 10:35 AM)hereticgame Wrote: Hello Everyone!
I need an help in how to remove lines appearing between mount and coating in microstructure taken in 200X .
Powder used is stellite-12(HVOF spray)
Polishing method : Final polishing usind DAC (0.5-1micron diamond paste)
[Image: 200x.jpg]

Note: If i replace the final polishing method using Chem pad and OPS solution then i dont get lines which i got using diamond paste (Water soluble)

Any help would be great .......... Thanks
Hi Kevin,
Thanks for suggestion , You are right in this i later came to know about this , But we are not equipped with automatic polishing machine . I do polishing manually by hand and yes about the Steps , i use 180 , 320 , 600 ,800 , for 30 sec each grit .
Thanks for help i will try to add more steps and apply little bit more pressure. the only problem with adding steps is it has a chance to loose its flatness when doing manually. thats why i reduce steps.

Reply




Possibly Related Threads…
Thread Author Replies Views Last Post
  Turbulent 450ns Microstructure. alvliew 10 5,606 11-17-2015, 12:43 PM
Last Post: Joris Kraak
Rolleyes improving 72FNS microstructure bigals 12 11,065 04-02-2013, 07:15 PM
Last Post: alan brown
  WC/Co Coating Microstructure kriskros 13 11,757 02-28-2012, 07:14 PM
Last Post: sreenuvundela
  Melting, unmelted AlSi Microstructure Amdry 2010 powder William 4 5,652 08-26-2010, 04:00 PM
Last Post: Gordon



Users browsing this thread: 1 Guest(s)





Surface Engineering Forum Sponsor - Alphatek Hyperformance Coatings Ltd