Possibility of Crack free in stellite 6 welding?

[Gopalakrishnan G]

Dear experts 

 Whether  it is possible to achieve crack free in stellite 6 welding?

I have a job in which I have to carry out hardfacing by stellite 6 and buffer layer with Tenalloy (E-7016).Preheating carried above 350c and interpass 250c with penning and after completion of welding job is covered by heating blanket.

 When I carry out dye penetrant crater cracks appears. But my client needs with 100% crack free.plz kindly give ur valuable guidelines. Thk u.

Regards

G.Gopalakrishnan 

 

[Kannayeram Gnanapandithan]

Why are you doing penning? Not 100%. crack free possible if the hardness is more than 35HRC. Why preheat

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[Gopalakrishnan G]

Thickness is 90mm and penning for stress relieving ( heat stress)

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[Kannayeram Gnanapandithan]

For stellite peening is not required

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[Gopalakrishnan G]

Sir why penning s not required in stellite? 

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