Higher hardness could mean:
Higher residual stresses
Martensite formation
The most probable cause are Higher residual stresses.
To reduce the residual stresses are following options:
1. Increase preheat. You may try 100degC
2. Decrease interpass temperature. You May try 150 degC
3. Decrease heat Input by shortening the arc or Increase welding spead
Στις Πέμ, 9 Απρ 2020, 13:31 ο χρήστης 'dwh@btinternet.com' via Materials & Welding <materials-welding@googlegroups.com> έγραψε:
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Try a slower welding speed and a closer arc length.
Regards, 9 4 2020.
David Harvey
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
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