General Studies · Welding Technology
In cast iron welding, what effect does hammering (peening) have on the welded surface?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1It makes the weld zone porous
- 2It expands the surface layer laterally, creating beneficial compressive stresses✓
- 3It increases the cooling speed of the weld
- 4It hardens the weld metal to prevent cracks
Correct answer
It expands the surface layer laterally, creating beneficial compressive stresses
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