Stellite Hardfacing test |
05-30-2008, 02:11 PM
Post: #1
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Stellite Hardfacing test
Dear all,
we are doing hardfacing in seat area for ic engine valves, please tell me the way out to find blow holes & bonding defects detection by Ndt Method, who is making the equipment. we are doing this by Pta process, also tell me what could be possible cause for this defect guru | |||
05-30-2008, 05:56 PM
Post: #2
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RE: Stellite Hardfacing test
Hi Guru
![]() Other than dye penetrant crack testing, which will only show defects that break the surface I think ultra-sonic, thermography, (possible eddycurrent) and radiography type methods will be needed to detect internal defects. I will leave your other questions to those more experienced with PTA (plasma transfer arc) welding process. Regards Gordon www.gordonengland.co.uk www.surfaceengineer.co.uk Photography Obsession | |||
05-31-2008, 07:05 PM
Post: #3
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RE: Stellite Hardfacing test
Gordon Wrote:Hi Guru hi everybody stellite on pta can be tested by uv i welded stellite on seats for oil for long time,pta is very sensible machine,everything can cause problems only the position of powder feeder can be determinante in quality of welding pre heat is very important,it depend the size you are welding ,we cant recomand any temperature gas must be controled :arg,hel dust extraction mustn t make turbulence otherwise you will have some problems :deposition of burnt particule on welding parts i hope this can help | |||
06-01-2008, 11:07 PM
Post: #4
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RE: Stellite Hardfacing test
hvofhamid Wrote:hi manGordon Wrote:Hi Guru seats I presum you weld 2" 3" 4" 5" 6" and 9" 2" preheat 110� 22 V first pass 150 A 2nd 145A 3" preheat 120-140� first pass 165A 2ND 150 A 4" 140-160� 165 2ND 155A 5" 180-200� 175 2ND 160 6" normal same temperature than 5" large piste 200-220� 175A 2ND 160A | |||
06-04-2012, 01:03 PM
(This post was last modified: 06-04-2012 01:04 PM by Aseem.)
Post: #5
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hey friends ,
I had a problem in my company , where i just joined for training , there are some components clad with PTA process , but NDT showed that there are cracks and some defects in the components , PLease if anyone can suggest a solution or just guide me to a link whre i can get one ..!! thanks ..!! (06-04-2012 01:03 PM)Aseem Wrote: hey friends , and yes it a stellite cladding | |||
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