1、Defect TypeDefect Description/ Visual AppearanceWas this type of Defect Found during the Audit?# of Defects Found or Total Defective Length of Weld in (in/mm)Sketch/PhotoTypical CausesNCOsCracks (Longitudinal or Transverse)Cracks are defined as fracture-type discontinuies characterized by a sharp ti
2、p and high ratio of length and width displacement. They can occur in weld metal or heat affected zone (HAZ)Current Too High. Travel Speed too Low. Combination of high current and low travel speedCrater CracksOccur in the crater of the weld when welding in improperly terminated. Crater Cracks are fou
3、nd in the starts or stops of the weld metalImproper Electrode manipulation. Improper parameter tapering at the weld stopUnconsumed Weld Wire Weld Wire sticking out of the weld metal poor workmanshipIncomplete FusionFailure of the weld metal to fuse completely at some portion of the weld zone or adja
4、cent base metal. This includes incomplete fusion of consumable insertsImproper weld joint preparation. Improper electrode manipulation. Current too low. Travel speed too highIncomplete Joint PenetrationA joint root condition in a groove weld in which weld metal does not extend through the joint thic
5、knessImproper weld joint preparation. Improper electrode manipulation. Current too low. Voltage too high. Travel speed too highIrregular bead profileUnderfill, valleys, sharp notches at root face, undercuts and surface ripplesSee Figure #1 belowPoor weld bead spacing. Poor wettability due to incorre
6、ct weld parameters, such as low voltage or high travel speedWELD INSPECTION CHECK LIST Note: SQE must review the GE Acceptance Criteria for the part while filling out this Inspection ChecklistOverlap (Roll Over/Cold Roll)The protrusion of weld metal beyond the weld toe or weld rootTravel speed too s
7、low. Welding electrodes too large for the parameters or positionSlag InclusionA discontinuity consisting of slag entrapped in weld metal or at the weld interfaceWelds in joint too narrow a joint angle or initial joint gap. In multipass welds, improper bead spacing can result in a valley , between be
8、ads with too narrow a gap or side walls with too narrow a joint angleSurface PorosityGas bubbles frozen in the solidified weld metalTypically caused by contamination on the base metal or filler metal. Too high a weld travel speed, loss of shielding, arc length too longUndercutIs a groove melted into
9、 the base metal adjacent to the weld toe or weld root and left unfilled by weld metalsCurrent too high. Voltage too high. Travel speed too high. Combination of these variablesUnderfillIs a condition in which the weld face or root surface of a groove weld extends below the adjacent surface of the bas
10、e metalTravel speed to high. Poor electrode manipulation. Current too lowSpatterGlobular drops of weld metal that are deposited on the weld or base material during welding, which do not form part of the weldArc Blow. Incorrect parameters such as current too high, voltage to high or both.Excessive we
11、ld ReinforcementIn groove welds, weld reinforcement is weld metal in excess of the quantity required to fill a jointWelder applied more weld metal then what was required Fillet Weld Leg is UndersizedWeld leg is not the correct height or width , not in complaince with drawing, or weld legs are unequa
12、lWelder did not apply enough weld metal per the requirement Fillet Welds too ConvexWeld is convex in nature has overfill or excessive weld appearanceWelder applied more weld metal then what was required Fillet Welds too ConcaveWeld is concave in nature has sunken in or underfill weld appearanceWelder did not apply enough weld metal per the requirement 0MLI #:_Figure #1 SQE NAME: _ DATE:_GE PO #: _ UNIT # _SUPPLIER NAME: _Total Number of Defects
