1. INSPECTION AND ASSAYING of SUBSTANCE DECANTS
CASTING METAL ENGINEERING
CLASS XII/ SEMESTER 5
ELEMENTARY COMPETENCY 2

2. Visual Test
Visual assaying that is assaying process done by using device indera ocular without other auxiliaries
Assaying of direct done by tester by seeing substance coran
This assaying limited to equiamplitude surface defects which can be seen by device indera ocular
Result reached depended from accuracy, skilled and experience of from tester
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3. Visual Test Surface roughness and Porositas Retakan Metal flow
Inklusi molding sand
Deformation or melintir
Scale
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4. Kinds Of Defects Decants
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5. Non Destructive Test (NDT)
Inspection of Equiamplitude surface :
Dye penetrant
Inspection In :
Magnet powder
Ultrasonic
Modulation echo
Radiography X-ray
Radiography gammaray
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6. Inspection of Equiamplitude Surface Defect With Dye Penetrant
Investigates smooth defect at equiamplitude surface coran
Applicable to all metal types, either magnetic and also no
There is 2 inspection :
1. With fluorensen
2. Colourant giving
Same inspection principle, difference at fluid colour penetran and its(the developer
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7. Defect Inspection Procedure With Dye Penetrant
Cleans equiamplitude surface of substance decants which will be investigated from rust, other oil and impurity
Giving of fluid penetran by way of died or dabbed, or sprayed sehinggga to cover up equiamplitude surface which will be tested.
Impurity cleaning
Penetrant liguid of giving
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8. Specimen is let [by] during 10 – 20 minutes, that fluid penetran diffuses at retakan. The duration depends on recommendation from suggested at fluid penetran
Cleans equiamplitude surface of substance decants tested by denga road(street is mop with cloth
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9. Gives fluid developver that fluid penetran is entering at retakan can interest and emerges equiamplitude surface. Be awaited during 5 – 10 minutes to give opportunity of fluid penetran to interest fluid developver
Investigates crack which seen at equiamplitude surface by illuminating equiamplitude surface of specimen with ultraviolet [light/ray] in dark room.
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10. Defect Inspection In With Magnet Powder
Inspection applied to know defect below(under equiamplitude surface or equiamplitude surface
Only limited to coran is having the character of magnetic
Can only know defect situation or location
Cannot know depth of defect
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11. Defect Inspection Procedure With Magnet Powder
Substance tested flown with high current, causing yields magnetic field
Equiamplitude surface of specimen is sowed with magnet powder
Observes line of force manet formed by iron powder. If(when at substance decants there is defect hence at the district will arise stronger magnet attractive force, so that powder gathers at the district
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12. Kinds Of Way Magnetization
Current aksial
Pierced current
Plot
Coil
Between poles
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13. Ultrasonic Defect Inspection
Exploits waving inaudible high frequency of man ( jitters per second /20 Khz)
Wave applied 250 – Khz
Waving then at substance, if there is defect will be bounced again
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14. Inspection of Modulation Defect Echo
Applies one probe which is functioning as transmission and receiver
Noise jitter transmitted from probe kedalam substance decants
Noise jitter is bounced again and received [by] probe, distribute to cathode-ray tube
Seen modulation drawing showing wave reflection of the noise
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15. Inspection of Defect Radiography X-ray
Substance decants must clear of oil and impurity
Installs film at its(the place
Substance decants tested put down between x-ray tube and film
Animates x-ray, so that about substance decants and pierced to film
Does film cleaning
Observes film accurately if there is defect hence at film will seen black stain
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16. Inspection of Defect Radiography X-ray
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17. Inspection of Defect Radiography Gammaray
Gammaray obtained from radio-activity isotope from a nuclear reactor
As energy source is used [by] Cobal – 60, Iridium – 192, and calsium 137
Gammaray can lead to all directions
Cooperative principle with X-ray
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18. THANK YOU CREATED BY : HERU KARYANA, SPd SMKN 2 KLATEN
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