(Liquid Penetrant Testing) PT, LPT,LPI

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???????????????????????? (Liquid Penetrant
Testing) PT, LPT,LPI
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???????????????????????? (PT) (Liquid Penetrant
Testing) ???????????????????????????????????????
? ?????????????????????? ?????????????????????
???? ??????? ??????? ???? ?????
?????????????????????????????????? ??????????????
?????????????????????????? 0.127 ?????? (C.E.
BETZ 1990) (0.075 ??????)
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Penetrant Red
Developer
Black light
Penetrant Fluorescent
Cleaner
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?????????????????????????????????? (PT)
1. ?????????????????????????????? 2.
???????????????????????????? PENETRANT
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?????????????????????????????????? (PT) (???)
3. ??????????? PENETRANT ???????? 4.
????????????????????????? DEVELOPER
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?????????????????????????????????? (PT) (???)
5. ??????????????????? 6. ????????????????????????
??
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Step 1
Cleaner
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Step 2
Penetrant
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Step 3
Cleaner
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???? Solvent Removable
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???? Solvent Removable
Penetrant ????????? ???????????????????
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Step 4
Developer
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Step 5
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???????????????????
??????? 1,2,3
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????????????????? ?????????????? 3 ??????
??????????????????????? 1.????????????
(Fluorescent dye) 2.??????????????????????
(Visible dye or color contrast dye) 3.????????????
?????????????????????????????????????? (Dual mode
penetrant)
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• ??????????????????????????????????????? 3 ????
• ?????????????????? (Water washable)
• ?????????????????????????????? (Post emulsifier)
• ????????????????????????? (Solvent removable

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• ??????? Developer
• ??????? (Dry developer)
• ???????? (Wet developer)

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• ???????? Dwell time ?????????????????????
• ???????????? (type of malarial)
• ????????????? (form)
• ??????????????????????? (type of discontinuity)

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???????????????????????????????????????? ASME
????? ???????????? ????????????????? ???????????????????? (Dwell time) ?????????????????????? (Developer time)
??????????, ??????????, ?????, brass and bronze, ????????? ??? high-temperature alloys ????????????? ????????? Cold shuts, porosity, lack of fusion, cracks (all forms) 5 10
Wrought materials-extrusions, forgings, plate Laps, cracks (all forms) 10 10
Carbide-tipped tools Lack of fusion, porosity, cracks 5 10
??????? ???????????????? Cracks 5 10
???? ???????????????? Cracks 5 10
??????? ???????????????? Cracks 5 10
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???????? Developer time ?????????? Developer
time ?????????????????????????????? Dwell time
????????????? 10 ???? ?????????? 60 ????
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???????????????????????????????
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?????????????????????????????????????????????????
??? Lipohilic
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?????????????????????????????????????????????????
??? Hydrophilic
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????????????????????????????????????
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??? Penetrant
??? Emulsifier
??? Developer
?????????????? Nozzle
?????
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Runchek testing element (cracked testing element)
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???????????????? Quench crack ??????
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Luminium element (ASME test bloc)
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Hollowed plate reference testblock 2 following EN
ISO 3452-3
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??????????????? test panel ??????
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????????????????????????? 1. ?????????????????????
????????????????????????????? 2.
???????????????????????????????????????????? 3.
???????????????????????????????????
???????????????????? 4. ??????????????????????????
???
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???????? 1. ??????????????????????????????????????
??? 2. ???????????????????????????????????????????
?????????????????????????????? 3. ??????????????
Dwell time ??? Developer time 4.
??????????????????????????????????????????????????
?????