RE: [MW:27786] Cracked Impeller Wear Rings

Hi Butch,

 

ER630 is the matching filler  for welding 17-4 steel.

If you want to do a thorough repair: Solution annealing before weld repair—Welding Repair-- Solution annealing after  weld repair should be the way to go. However this may cause dimensional changes if proper jigs are not used for distortion control. Also sequential welding would be advisable.

 

17-4 is a difficult steel to weld. Best weldability is in solution annealed condition only. After aging %EL would hardly exceed 8-10% , which is as good as a brittle material.

 

The other option for a temporary repair would be  to use ER309L or Inconel 82 filler.

 

Hope this would of help .

 

Thanks.

 

P.Goswami.P.Eng, IWE.

Welding & Metallurgical Specialist

Linkedin: https://www.linkedin.com/in/pradip-goswami-2999855/

Email:pgoswami@quickclic.net,pradip.goswami@gmail.com

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Butch Murrell
Sent: May 2, 2018 2:23 PM
To: materials-welding@googlegroups.com
Subject: RE: [MW:27773] Cracked Impeller Wear Rings

 

Thank you but I have machine shop to machine back to OEM and also a Schenck 6400# balancing machine to balance.  My issue is the welding process needed for this material.

What would be your COLD suggestion?

Respectfully,

 

Butch26

 

From: materials-welding@googlegroups.com <materials-welding@googlegroups.com> On Behalf Of Nachhattar Singh
Sent: Wednesday, May 02, 2018 10:25 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:27770] Cracked Impeller Wear Rings

 

Dear

 

The impeller rings not to be welded if there are more cracks, because you can't get surface perfection then you will experience the imbalance and the impeller will further get damaged and ultimately purpose will not be solved.

Yes, only one option if you want to go for cold repairs in case of emergency and nonavailability of the resources for building up.

Good luck.

N.S. 

 

On Wed, May 2, 2018, 8:46 PM Butch26 <butchmurrell26@gmail.com> wrote:

Dear experts,

 

Have several cracks on the wear rings of a Goulds pump Impeller.  PMI has been performed and rings have been identified as --17-4 Ph.  The impeller itself is a mild c/s.

Have no references on welding these two metals together?  Any ideas or procedures?

 

Respectfully,

 

Butch26

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