Weld tawg nyob rau hauv ib lub nkoj siab yog feem ntau teej tug ncua txias cracking thiab kev faib yog dav heev.Nyob rau hauv cov txheej txheem ntawm kev tsim cov hlab ntsha siab thiab kev sib xyaw ua ke los ntawm kev saib xyuas tshwj xeeb, tab sis vim nws "ntev", nyob rau hauv qhov kev txiav txim ntawm kev tswj hwm kev ntxhov siab, feem ntau nyob rau hauv ib xyoos kev soj ntsuam, tseem tuaj yeem pom muaj ntau.Ntawm no nws tsis yog kev tshawb fawb txog kev ntxhov siab hauv zos, lossis kev kho cua sov tsis yog raws sijhawm, tsis sib xws thiab lwm yam laj thawj, tsuas yog rau qhov kev hloov pauv loj heev, thiab yuav tsis raug cuam tshuam tag nrho rau qhov chaw ua haujlwm ntawm qhov chaw tawg qhov kev tshawb nrhiav yuav tau tham.Xws li nto tawg kab nrib pleb feem ntau nrog lub iav tsom iav los yog lub tshuab tsom iav tuaj yeem pom pom.Nws lub xub ntiag tsis tsuas yog txo cov vuam lub zog, tab sis kuj tseem muaj kev ntxhov siab yuav ua rau muaj qhov tshiab, thaum lub workpiece yog los ntawm kev thauj khoom, ua rau qee qhov tawg yuav nrawm nrawm, ua rau cov khoom puas.Yog li ntawd, nyob rau qee kis, nws yog qhov txaus ntshai tshaj li lwm hom macroscopic tawg.Nyob rau hauv lub siab lub nkoj soj ntsuam, yuav ua li cas zoo dua mus ntes microcracks, txhim kho tus nqi ntawm cov microcracks, uas yog muab tso rau hauv ib lub thawv tshuaj ntsuam xyuas thiab raug mob nyob rau hauv pem hauv ntej ntawm ib tug tiag tiag teeb meem, thiab yuav ua li cas kom raug nrhiav thiab quantity nyob rau hauv kev txiav txim. tsim kom muaj qhov kev pab cuam rov qab los yog qhov tseem ceeb heev.

Kev loj hlob sai ntawm kev lag luam niaj hnub no, muaj ntau yam kev tshawb nrhiav tshuab, uas muaj nws tus kheej lub zog thiab tsis muaj zog.Yog li yuav ua li cas thiaj li xaiv qhov zoo tshaj plaws 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 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 txhawmNws tuaj yeem muab faib ua ntu ntu: kev tshuaj xyuas qhov muag (VT), sib nqus particle kuaj txoj kev (MT), kev ntsuas kev nkag siab (PT), kuaj ultrasonic (UT), kev tshuaj xyuas hluav taws xob (RT).

Txhawm rau txhim kho qhov kev kuaj pom tus nqi ntawm micro-cracks, nrog rau ib txoj hauv kev rau kev kuaj pom qhov muaj qhov tsis muaj kev txwv ntau thiab kev tsis pom zoo yuav ua rau tsis pom tseeb.Los ntawm kev xyaum, peb ntseeg hais tias muaj kev puas tsuaj loj rau nruab nrab thiab siab lub nkoj welds microcracks kuaj yuav tsum tau siv ntau yam kev tshawb nrhiav.Cov kws tshuaj ntsuam xyuas lub nkoj ua haujlwm soj ntsuam yuav tsum txheeb xyuas cov teeb meem tshwj xeeb, kev siv ntau yam kev tshawb nrhiav, thiab qhia txog cov haujlwm tseem ceeb;Kev tshawb nrhiav raug mob yuav tsum tau daws nrog cov teeb meem tshwj xeeb, kev siv lub laj thawj kev tshawb fawb txog ntau yam kev tshawb pom, lub hom phiaj meej.