1. Kev nyuaj siab nyem annealing (thawj txoj kev thiab feem ntau cov qauv)
Cov ntsiab lus:
Sov tag nrho cov kev sib dhos welded tsis zoo rau qhov kub thiab txias550-600 degree(Qhov tseem ceeb kom tsis txhob tshaj 620 degree, uas tuaj yeem txwv lub hauv paus hlau lub zog).
Tswj qhov kub no rau1-2 teev rau 25mm ntawm phaj tuab(xws li, 4 teev rau 50mm -} tuab seem) kom cia cov kev ntxhov siab txaus ntawm kev ntxhov siab.
Txias maj mam ntawm kev tswj hwm tsawg dua lossis sib npaug rau 50℃/ teev kom txog rau thaum lub sib zog mus txog 300 degree, ua raws li cov cua txias. Kev haus sai sai yog txwv tsis pub dhau los raws li nws reintrododuces kev ntxhov siab thiab kev pheej hmoo tawg.
Kev siv tau: Mandatory for load-bearing parts (e.g., bridge girders, pressure vessel shells) with thickness >20mm, lossis pob qij txha raug tsim kom muaj kev thauj khoom zoo (piv txwv li, cov kev ua phem) lossis thaj chaw hnyav (ntug dej hiav txwv).
2. Tsawg - kub tempering (ntxiv rau cov phiaj tuab)
Cov ntsiab lus:
Thaum tshav kub kub welded tivthaiv rau180-220 degreethiab tuav tau 2 teev.
Qhov kub me txhawj txog lub hauv paus hlau tab sis pab kom txo tau microstruction inhomogeneity nyob rau hauv lub haz, txhim kho kev nruj me nyuam yam tsis muaj lub zog sib cuam tshuam.
Kev siv tau: Particularly useful for plates >30 hli tuab los yog cov khoom siv uas siv nyob rau hauv cov cheeb tsam txias (hauv qab 0 degree), qhov twg tswj tsis muaj qhov kub thiab txias yog qhov tseem ceeb.
3. Vibratory ntxhov siab (tsis -} therm therm altern Lwm yam rau cov rooj plaub tshwj xeeb)
Cov ntsiab lus:
Rhais cov vibrators rau welded tivthaiv thiab siv cov kab ntawm zaus hauv cov khoom siv ntawm lub ntuj resonance (feem ntau 10-200 hz) rau 30-120 feeb.
Lub vibrations refricused sab hauv kev ntxhov siab los ntawm kev txhawb nqa kev tsis txaus siab nyob rau hauv microstructure, txo qib kev ntxhov siab, txo qis kev ntxhov siab qib.
Kev siv tau: Haum rau me me, cov khoom siv nyuaj lossis qhov chaw uas muaj siab {}}} kub}} walled qauv qauv). Nws tsis tshua muaj txiaj ntsig dua li annealing (txo kev ntxhov siab los ntawm ~ 30-50%) tab sis zam cov kev pheej hmoo xws li kev pheej hmoo zoo li kev pheej hmoo zoo li kev pheej hmoo zoo li cov phom sij siab.
