Tom qab-weld non-destructive kuaj xyuas

Feem ntau siv cov txheej txheem kuaj tsis muaj kev puas tsuaj

1.UT (Ultrasonic Test)

—— Lub hauv paus ntsiab lus: Lub suab nthwv dej nthuav tawm hauv cov khoom siv, thaum muaj impurities ntawm qhov sib txawv ntawm cov khoom, lub suab nthwv dej yuav tshwm sim, thiab cov nyhuv piezoelectric ntawm cov khoom siv yuav raug tsim tawm ntawm cov khoom: lub caij hauv kev sojntsuam tuaj yeem hloov pauv. Lub zog hluav taws xob ua hluav taws xob ua hluav taws xob, thiab qhov cuam tshuam rov qab, lub zog hluav taws xob hloov pauv mus rau hauv hluav taws xob hluav taws xob Ultrasonic longitudinal yoj thiab shear yoj / shear yoj, kev sojntsuam muab faib rau hauv kev sojntsuam ncaj thiab oblique sojntsuam, ncaj sojntsuam feem ntau kuaj cov khoom, oblique sojntsuam feem ntau ntes welds

—— Ultrasonic kuaj cov cuab yeej thiab cov kauj ruam ua haujlwm

Khoom siv: Ultrasonic flaw detector, sojntsuam, kuaj thaiv

Txheej txheem:

Txhuam coated couplant.Tshawb pom.Ntsuam xyuas cov cim qhia

—— Ultrasonic nrhiav tus yam ntxwv

Peb-dimensional positioning yog qhov tseeb, tso cai tsuas yog los ntawm sab ntawm cov khoom siv los ua haujlwm, nrhiav kom pom qhov tuab ntawm qhov loj - txog li 2 meters lossis ntau dua, tuaj yeem kuaj xyuas qhov tseem ceeb tsis tu ncua - hom tiaj tus tsis tu ncua, khoom siv yooj yim nqa, yuav tsum muaj qhov tsis txaus ntseeg tus neeg teb xov tooj. yog siab dua, thickness feem ntau yuav tsum tsis pub tsawg tshaj 8 hli, du nto

—— Cov ntsev ntsev siv rau kev kuaj xyuas qhov tsis txaus siab yog qhov siab heev, thiab nws yuav tsum tau muab ntxuav tam sim ntawd tom qab kuaj pom qhov tsis haum

Cov tshuaj txhuam hniav siv rau hauv kev tshawb nrhiav qhov tsis zoo hauv kev lag luam hauv kev lag luam hnyav muaj cov ntsiab lus ntsev ntau, thiab yog tias nws tsis tau ntxuav hauv lub sijhawm, nws yuav muaj kev cuam tshuam zoo rau qhov zoo ntawm cov tshuaj tiv thaiv corrosion.

Rau cov txheej txheem los tiv thaiv corrosion, nws lub luag haujlwm tseem ceeb yog cais tawm huab cua lossis dej (electrolyte) los ntawm qhov chaw tiv thaiv, tab sis qhov kev sib cais no tsis muaj tseeb, tom qab lub sijhawm, vim huab cua siab, huab cua lossis dej (electrolyte) tseem yuav tseem. nkag mus rau qhov chaw tiv thaiv, ces qhov chaw tiv thaiv yuav tsim cov tshuaj tiv thaiv nrog cov dej noo lossis dej (electrolyte) hauv huab cua, thaum corroding qhov chaw tiv thaiv.Cov ntsev tuaj yeem siv los ua cov catalysts txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau ntsev ntsev, cov ntsev ntsev tuaj yeem siv los ua cov tshuaj tua kab mob.

Hauv kev lag luam kev lag luam hnyav, muaj kev ua haujlwm - kev kuaj xyuas qhov tsis zoo, kev siv tshuaj txhuam (couplant) ntsev yog siab heev, cov ntsiab lus ntsev tau mus txog ntau dua 10,000 μs / cm (kev lag luam feem ntau yuav tsum tau ntsev cov ntsiab lus ntawm abrasive tsawg dua. tshaj 250 μs / cm, peb cov dej hauv tsev ntsev feem ntau yog li 120 μs / cm), nyob rau hauv cov ntaub ntawv no, kev tsim cov xim, cov txheej yuav poob nws cov nyhuv anti-corrosion nyob rau hauv lub sij hawm luv luv.

Qhov kev coj ua ib txwm yog yaug tawm qhov tsis pom qhov tsis raug muab tshuaj txhuam nrog dej huv tam sim ntawd tom qab kuaj pom qhov tsis haum.Txawm li cas los xij, qee lub tuam txhab tsis muab qhov tseem ceeb rau kev tiv thaiv corrosion, thiab tsis txhob ntxuav cov tshuaj txhuam tom qab kuaj pom qhov tsis zoo, ua rau nyuaj rau tshem tawm qhov tsis pom kev muab tshuaj txhuam tom qab ziab, uas cuam tshuam ncaj qha rau kev tiv thaiv corrosion zoo ntawm txheej.

Ntawm no yog ib txheej ntawm kev sim cov ntaub ntawv:

1. Cov ntaub ntawv ntsev ntawm cov kua dej tsis haum

—— Lub hauv paus ntsiab lus: propagation thiab absorption ntawm rays - propagation nyob rau hauv cov ntaub ntawv los yog welds, nqus rays los ntawm films

Ray absorption: cov ntaub ntawv tuab thiab ntom nqus ntau cov rays, uas ua rau muaj qhov tsis zoo ntawm cov yeeb yaj kiab thiab cov duab dawb.Ntawm qhov tsis sib xws, daim duab yog tsaus dua

Discontinuities nrog cov duab dub muaj xws li: slag inclusion \ cua qhov \ undercut \ tawg \ tsis tiav fusion \ tsis tiav kev nkag mus

Discontinuities nrog dawb duab: tungsten inclusion \ spatter \ overlap \ high weld reinforcement

—— RT cov kauj ruam ua haujlwm

Ray qhov chaw nyob

Muab cov ntawv tso rau ntawm sab nraub qaum ntawm lub vuam

Raug raws li qhov teeb meem nrhiav kom tau cov txheej txheem tsis

Kev txhim kho zaj duab xis: txhim kho - kho - ntxuav - ziab

Kev ntsuam xyuas zaj duab xis

Qhib daim ntawv qhia

—— Ray qhov chaw, duab zoo qhia, blackness

Kab qhov chaw

X-ray: lub transillumination thickness feem ntau tsawg dua 50mm

Siab zog X-ray, accelerator: lub transillumination thickness yog ntau tshaj 200mm

γ Ray: ir192, Co60, Cs137, ce75, thiab lwm yam, nrog transillumination thickness li ntawm 8 mus rau 120mm

Linear duab zoo qhia

Qhov hom duab zoo qhia yuav tsum tau siv rau FCM ntawm choj

Blackness d=lgd0/d1, lwm qhov Performance index rau kev soj ntsuam cov yeeb yaj kiab rhiab heev

X-ray hluav taws xob xav tau: 1.8 ~ 4.0;γ Radiographic yuav tsum: 2.0 ~ 4.0,

—— RT cov khoom siv

Ray qhov chaw: X-ray tshuab lossis γ X-ray tshuab

Ray tswb

Lub hnab ntim khoom

Daim duab zoo qhia: kab hom lossis hom dhau

Qhov ntsuas dub

Zaj duab xis tsim tshuab

(qhov cub)

Zaj duab xis saib teeb

(chaw raug)

—— RT nta

Muaj feem xyuam rau txhua yam ntaub ntawv

Cov ntaub ntawv (tsis zoo) yog yooj yim los khaws

Kev puas tsuaj rau tib neeg lub cev

Directivity ntawm discontinuities:

1. rhiab heev rau discontinuities parallel rau beam kev taw qhia

2. insensitive rau discontinuities parallel rau cov khoom nto

Hom kev tsis sib xws:

Nws yog rhiab rau peb-dimensional discontinuities (xws li pores), thiab nws yog ib qho yooj yim kom tsis nco qab soj ntsuam rau lub dav hlau discontinuities (xws li tsis tiav fusion thiab tawg) Cov ntaub ntawv qhia tau hais tias tus nqi ntawm RT rau cov kab nrib pleb yog 60%.

RT ntawm feem ntau cov khoom yuav tsum tau nkag los ntawm ob sab

Qhov tsis zoo yuav raug tshuaj xyuas los ntawm cov neeg ua haujlwm paub txog

3.mt (magnetic particle soj ntsuam)

—— Lub hauv paus ntsiab lus: tom qab lub workpiece yog magnetized, lub magnetic leakage teb yog generated nyob rau hauv lub discontinuity, thiab cov magnetic particle yog adsorbed los tsim cov hlau nplaum kab.

Sib nqus teb: mus tas li magnetic teb thiab electromagnetic teb generated los ntawm cov hlau nplaum tas mus li

Sib nqus particle: qhuav magnetic particle thiab ntub magnetic particle

Sib nqus particle nrog xim: dub magnetic particle, liab magnetic particle, dawb magnetic particle

Fluorescent magnetic hmoov: irradiated los ntawm ultraviolet teeb hauv chav tsaus, nws yog daj ntsuab thiab muaj qhov siab tshaj plaws

Directivity: discontinuities perpendicular mus rau cov kev taw qhia ntawm magnetic kab ntawm quab yuam yog qhov rhiab tshaj plaws

—— Cov txheej txheem magnetization

Longitudinal magnetization: yoke method, coil method

Circumferential magnetization: hu rau txoj kev, central conductor method

Magnetizing tam sim no:

AC: siab rhiab heev rau nto discontinuities

DC: siab rhiab heev rau ze qhov chaw discontinuities

—— Magnetic particle kuaj cov txheej txheem

Ntxuav workpiece

Magnetized workpiece

Siv cov khoom sib nqus thaum sib nqus

Kev txhais thiab kev ntsuam xyuas ntawm cov kab sib nqus

Ntxuav workpiece

(demagnetization)

—— MT nta

Siab rhiab heev

muaj txiaj ntsig

Yoke txoj kev thiab lwm yam khoom siv yooj yim txav

Nyob ze ntawm qhov tsis sib xws tuaj yeem kuaj pom piv rau kev nkag mus

Tus nqi qis

Tsuas yog siv tau rau cov ntaub ntawv ferromagnetic, tsis siv rau austenitic stainless hlau, aluminium alloy, titanium alloy, tooj liab thiab tooj liab alloy.

Nws yog rhiab heev rau txheej ntawm lub workpiece nto.Feem ntau, txheej thickness yuav tsum tsis pub tshaj 50um

Qee zaum cov khoom yuav tsum tau demagnetization

4.pt (kev tshuaj ntsuam xyuas)

—— Lub hauv paus ntsiab lus: siv cov capillarity nqus rov qab cov penetrant seem nyob rau hauv lub discontinuity, kom cov penetrant (feem ntau liab) thiab cov imaging kua (feem ntau yog dawb) sib tov los tsim ib tug zaub

—— Penetrant tshuaj xyuas hom

Raws li hom duab tsim:

Xim, pom lub teeb

Fluorescence, UV

Raws li txoj kev tshem tawm ntau dhau penetrant:

Kev tshem tawm hnyav

Txoj kev ntxuav dej

Tom qab emulsification

Txoj kev siv ntau tshaj plaws hauv cov qauv steel yog: xim hnyav tshem tawm txoj kev

—— Test cov kauj ruam

Ntxuav workpiece: siv cov tshuaj ntxuav

Siv cov penetrant thiab khaws cia rau 2 ~ 20 feeb.Kho nws raws li qhov kub thiab txias.Yog hais tias lub sij hawm luv luv, lub penetrant tsis tiav, ntev dhau lawm los yog kub heev, lub penetrant yuav qhuav Lub penetrant yuav tsum tau khaws cia ntub dej thoob plaws hauv lub xeem.

Tshem tawm cov dej ntau dhau nrog cov tshuaj ntxuav.Nws yog txwv tsis pub cov tshuaj ntxuav tu ncaj qha rau ntawm lub workpiece.So nrog daim ntaub huv los yog daim ntawv dipped nrog penetrant los ntawm ib qho kev taw qhia kom tsis txhob tshem tawm cov kev sib txuas tsis tu ncua los ntawm kev ntxuav.

Siv ib txheej txheej thiab nyias txheej ntawm cov txheej txheem tsim tawm nrog lub sijhawm txau ntawm li 300mm.Cov kev daws teeb meem tuab heev tuaj yeem ua rau muaj kev cuam tshuam

Piav thiab ntsuam xyuas qhov tsis sib xws

Ntxuav workpiece

—— PT nta

Kev ua haujlwm yog yooj yim

Rau txhua yam hlau

Siab rhiab heev

Yooj yim txav heev

Kev tshawb pom ntawm qhov chaw qhib qhov tsis sib xws nkaus xwb

Kev ua haujlwm qis

High nto sib tsoo yuav tsum

ib puag ncig muaj kuab paug

Adaptability ntawm ntau yam tshuaj xyuas rau qhov chaw tsis raug