REG : HARDFACING(ST-6) PRECAUTIONS OVER Cn3Mn CASTINGS

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srima...@gmail.com

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Apr 29, 2019, 3:17:58 AM4/29/19
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DEAR EXPERTS 
                               WHILE HARDFACING DONE IN PTA WELDING OVER CN3MN MATERIAL WE FOUND SMALL (3-4 MM LENGTH) CRACKS IN EVERY WHERE.PLEASE GUIDE US WHAT ARE ALL THE PRECAUTIONS WE CAN MADE BEFORE WELDING ?

REGARD'S
M.VENKATESAN
SRIMASSTECH 
CHENNAI

RAHUL Rathod

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Apr 29, 2019, 9:35:46 AM4/29/19
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Dear Venkatesan 

Can you tell me what is your work Application, as per my knowledge some welding consumables have a natural tendency to crack due to high hardness if the crack is transverse, then no problem & please tell me which welding consumable you use & how much hardness its give as welded?
  

With Regards


Rahul J Rathod 
Welding Technician 

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RAHUL Rathod

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Apr 29, 2019, 10:16:59 PM4/29/19
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If you use Chromium carbide base welding consumable for Abrasion Resistance then crack is Natural, Deposit max 2 Layer ( 6 to 8 mm )

With Regards


Rahul J Rathod 
Welding Technician 

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C.Muni

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Apr 29, 2019, 10:16:59 PM4/29/19
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Can you share your WPS so that I can help you.

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Venkat SRIMASSTECH

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May 1, 2019, 12:19:36 AM5/1/19
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The hardness should be 38 to 40 HRC.

On 29-Apr-2019 7:05 PM, "RAHUL Rathod" <welder....@gmail.com> wrote:
Dear Venkatesan 

Can you tell me what is your work Application, as per my knowledge some welding consumables have a natural tendency to crack due to high hardness if the crack is transverse, then no problem & please tell me which welding consumable you use & how much hardness its give as welded?
  

With Regards


Rahul J Rathod 
Welding Technician 

mob +91 9727076573

whats up +91 81155889118

 view my profile onLinkedIn view my profile on facebook my skype id

On Mon, 29 Apr 2019 at 12:47, <srima...@gmail.com> wrote:
DEAR EXPERTS 
                               WHILE HARDFACING DONE IN PTA WELDING OVER CN3MN MATERIAL WE FOUND SMALL (3-4 MM LENGTH) CRACKS IN EVERY WHERE.PLEASE GUIDE US WHAT ARE ALL THE PRECAUTIONS WE CAN MADE BEFORE WELDING ?

REGARD'S
M.VENKATESAN
SRIMASSTECH 
CHENNAI

--
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Venkat SRIMASSTECH

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May 1, 2019, 12:19:36 AM5/1/19
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Dear sir ,
               The application was oil gas valve spares.the overlay filler material make kennametal PTA powder.

On 29-Apr-2019 7:05 PM, "RAHUL Rathod" <welder....@gmail.com> wrote:
Dear Venkatesan 

Can you tell me what is your work Application, as per my knowledge some welding consumables have a natural tendency to crack due to high hardness if the crack is transverse, then no problem & please tell me which welding consumable you use & how much hardness its give as welded?
  

With Regards


Rahul J Rathod 
Welding Technician 

mob +91 9727076573

whats up +91 81155889118

 view my profile onLinkedIn view my profile on facebook my skype id


On Mon, 29 Apr 2019 at 12:47, <srima...@gmail.com> wrote:
DEAR EXPERTS 
                               WHILE HARDFACING DONE IN PTA WELDING OVER CN3MN MATERIAL WE FOUND SMALL (3-4 MM LENGTH) CRACKS IN EVERY WHERE.PLEASE GUIDE US WHAT ARE ALL THE PRECAUTIONS WE CAN MADE BEFORE WELDING ?

REGARD'S
M.VENKATESAN
SRIMASSTECH 
CHENNAI

--
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https://www.linkedin.com/groups/122787
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Chintan

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May 1, 2019, 2:45:33 AM5/1/19
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Apply ss 316L as buffer layer thickness 2 mm
Then grind / machine the component to have uniform 2 mm buffer layer on whole assembly

Preheat 100 deg cel interpass 175 deg cel
Do not over heat base metal, temp shuold not cross 200 deg cel in any case
Apply pta powder
SLOW COOLING TO ROOM TEMPRATURE BY wraping in fire blanket

( if possible to replace pta by gmaw then use ERCocr-a wire for better result)

Vinay Thattey

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May 5, 2019, 3:35:11 AM5/5/19
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Dear Venkat , minor transvers crack shouldnot be an issue . This is a generic with some hardfacing consumable.

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Chintan Raval

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May 5, 2019, 6:38:52 AM5/5/19
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For 38 to 45 HRC 
Stress reliving crack not acceptable 
It must be crack free 

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Venkatachalam Govindan

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May 7, 2019, 11:06:21 PM5/7/19
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\\For 38 to 45 HRC 
Stress reliving crack not acceptable 
It must be crack free //

Yes; crack not acceptable..
Venkatachalam Govindan
QHSE Lead / Trainer
(IRCA Registered Lead Auditor & API / CQI Practitioner)
+965 97604989, +919840502376 (WhatsApp only)
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