FY-TECH FY-4200/2E - Troubleshooting Lack of Penetration; Causes and Corrective Actions for Penetration

4、Lack Of Penetration
Lack of Penetration Good Penetration
Improper weld technique.
Material too thick.Joint preparation and design
must provide access to bottom of groove while mai-
ntaining proper welding wire extension and arc ch-
aracteristics.
Maintain normal gun angle of 0 to 15 degrees
to achieve maximum penetration.
Keep arc on leading edge of weld puddle.
Do not extend wire too far from nozzle.
Select higher wire feed speed and/or select
higher voltage range.
Reduce travel speed.
Insufficient heatinput.
Possible Causes
Corrective Actions
Improper joint preparation.
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Lack Of Penetration:
Shall fusion between weld metal and base metal.