I am not sure whether you have done post heating or not. If not, then go for it.
Increasing preheat is good option.
Moreover you can increase the weld deposition of tack weld.
Also do some mechanical restraining till the sufficient weld is deposited.
One more improvement is to do electrical preheating which provides you the uniform heating over a wide area and reduces the thermal stress.
Jaydeep Joshi | Welding Engineer. TDW India Limited
Plot No 16 | Phase –III | Alindra – Savli G.I.D.C | Taluka : Savli | Vadodara – 391 775
Board : +91-2667- 619900 | Fax : +91- 2667- 619501| Extension : 7845
E-Mail : jaydeep.joshi@tdwilliamson.com | www.tdwilliamson.com
Cell: +91 9978959626
P Before printing, Think about ENVIRONMENTAL responsibility
On Mon, Dec 6, 2010 at 2:04 PM, marcelo <marcelopsoriano_1925@yahoo.com.ph> wrote:
vasu,
we are also have the same problem before, i am suggesting you to put a
tacking bridge same material as base metal and to be tack in bevel
face and increase the preaheat temp. up to 177-180 deg. celcius
marcelo p. soriano
qa/qc eng'r
On Dec 3, 7:37 am, srinivas rao <ksrv...@gmail.com> wrote:
> Dear All,
>
> we are using FILLER WIRE ER 90SB3 FOR SA387GR22 CL-2 thk 6mm...we are are
> pre-heating to 150 with torch....after doing tacking, about 95% of tacks
> are found to have cracks .We have not released for Welding.The filler
> material is checked and ok. pls give your sugestions.
>
> Regards
>
> Vasu
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