Support documentation: The factor which has on magnetic resistance
Nugget profiler |
Ultrasonic type |
Driver check (DC) chisel test |
|
The contents of detection |
The amount of change of
metallographic structure |
Distance to the changing point of acoustic impedance |
Mechanical strength |
A thing to be examined |
Only iron |
Iron, Nonferrous metal |
Iron, Nonferrous metal |
Area which can be inspected. |
〇 The part which does not have a convex around an inspection side (Contact area size is 18x10mm) |
◎ : Single type ○ : Array type |
△ Area where tool cannot be inserted is impossible. |
Quantification of a nugget |
○ |
× : Single type △ : Array type |
× |
Distinction with Cold-joint |
○ (comparison of a value in fixed quantity) |
△ |
○ |
Damage to the test object |
None |
Wiping of water and oil
is required. =>Metal corrosion |
A bend occurs.
Tapping-back is necessary. =>Metal fatigue |
Inspection of three sheets |
△ (Inspection from surface and back side) |
○ |
△ (Inspection from surface and back side) |
Application to High-tension steel |
○ |
○ |
△ (Those with a possibility of cracking a welding part. ) |
Inspection time |
○ |
△ |
◎ |
Traceability |
○ |
○ |
× |