Dear Mr. Goswami, thanks for the reply.
Actually the case is that I have to perform hardfacing of duplex SS on a substrate of duplex SS. Can you share your experience? What do you recommend for the heat input, filler and welding parameters?
Thanks in advance
Parvan Chavdarov
Цитат от pgoswami@sympatico.ca:
>
>
>
> Hi Pravan,
>
>
>
> Duplex stainless steel can be overlayed on a substrate of C.S or
> LAS. Alternatively you may hard face on duplex S.S with due
> precaution because the interface would have a tendency to embrittle.
>
>
>
> From your query I would presume that you want to overlay duplex S.S
> on a substrate of C.S or LAS. Under those circumstances the
> following would be be appropriate:-
>
>
> Barrier layer with E-309L/309LMo, use 1/8" diameter
> Subsequent layers with E-2209 , 1/8" OR 5/32" dia.
>
>
> The barrier layer chemistry is greatly affected by the dilution rate
> which depends on the welding parameters. Hence choose the optimum
> welding parameters as per consumable manufacturer. The same applies
> for the subsequent layers also.
>
>
>
> Follow the guidelines in ASME Sec-IX for qualification of welding procedures.
>
>
>
> Thanks
>
>
>
>
>
> Pradip Goswami,P.Eng
> Welding & Metallurgical Engineer/Specialist
> Ontario Power Generation Inc.
> Temp Mobile No (In India till 16 March)-9830976290
>
>
>
>
>> Date: Sun, 7 Mar 2010 03:36:14 +0200
>> From: p_chavdarov@mail.bg
>> To: materials-welding@googlegroups.com
>> Subject: [MW:4457] hard-facing of duplex steels
>>
>> Dear colleagues,
>>
>> has somebody experience with overlaying of duplex stainless steel
>> 2205? Can you send me some details regarding the fillers and the
>> welding parameters or an example of a WPS?
>>
>> Preliminary thanks
>> Parvan Chavdarov
>>
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