1. Cov hom phiaj tseem ceeb ntawm pwht rau Q460NH hauv qis - kub siv
Residual kev ntxhov siab: Vuam tsim tsis ncaj / cog lus, tawm hauv cov kev ntxhov siab nyob hauv weld thiab cua sov}} be} cuam tshuam cheeb tsam (Haz). Hauv cov kub tsawg, qhov kev ntxhov siab no ntawm qhov khuam (piv txwv li, microcacks) thiab ua rau cov nqaj hlau loj.
Nkig microstructure: Txias nrawm tshaj tawm -} vuam yuav tsim tawv, brittle martensite hauv lub haz. Pwht softens no theem thiab ua kom zoo dua kib kom rov ua kom nruj.
Hydrogen Tapping: Vuam nqus hydrogen (los ntawm noo noo, flux, thiab lwm yam) (}}}}}}}}}}}}}}}}}}}}}}}
2. Thaum PWHT yuav tsum muaj (Yuav tsum muaj cov xwm txheej)
Tuab -}}} phab ntsa Cheebtsam: Rau Q460NH daim phiaj / Welds nrog lub thickness ntau dua los yog sib npaug rau 25mm (lossis kev sib luag rau 20mm), duab yog qhov yuav tsum ua. Cov tshooj tuab tuab ntau dua kev ntxhov siab thiab txias qeeb me ntsis, ua kom muaj kev phom sij ua rau muaj kev kub siab.
High - ntim lossis kev nyab xeeb - tseem ceeb qauv: Cheebtsam cov kabmob dynamic kev thauj khoom (piv txwv li cov choj txhawb nqa, cov hlab ntsha siab) lossis siv ntau dua los yog sib npaug kom ntseeg tau ntev thiab ntxhov siab.
Welds nrog hydrogen cov ntsiab lus: Yog tias tsis tshua muaj siab (piv txwv li cov ntoo kom zoo nkauj
3. Pom zoo PWHT cov txheej txheem tsis rau Q460NH
Cua kub tus nqi: Tsawg dua lossis sib luag rau 200℃/ h (qeeb dua rau cov ntu tuab, piv txwv li ntau dua lossis sib npaug nrog 50 hli thickness) los tiv thaiv lub rhaub dej thiab tsis sib luag.
Tuav kub: 550-620 degree(tseem ceeb heev). Hauv qab 550 degree, residual kev ntxhov siab tsis tau relieve; Saum toj no 620 degree, tus hlau lub zog txo qis (tawm los ua kom tiav 460MPA) thiab huab cua cais, ua rau muaj kev tiv thaiv Patina.
Lub sij hawm tuav: 1-2 teev (lossis 1 teev rau 25mm ntawm tuab) kom ntseeg tau tias muaj kev sib pauv tshav kub thiab microstructure kev hloov pauv.
Cua txias tus nqi: Tsawg dua lossis sib npaug ntawm 150 Degree / h kom txog thaum txias kom tsawg dua lossis sib npaug nrog 300 degree, tom qab ntawd cia ntuj txias rau chav sov. Sai sai txias tom qab pwht tuaj yeem rints tuaj yeem rintrododuency kev ntxhov siab lossis rov {{}}} paim loj.
4. Cov ntaub ntawv qhov twg Pwhant yuav raug zam (nrog kev tiv thaiv nruj me ntsis)
Nyias seem: Welds nyob rau hauv cov phiaj tsawg dua lossis sib npaug rau 12 hli tuab, nrog ib qho loj {2} {2} {2}-} {2} {}}}} kub sai sai thiab ntxiab kev ntxhov siab tsawg.
Tsawg - kev pab cuam: Cheebtsam uas siv rau hauv cov kub tsawg (- 10 degree) nrog zoo li qub, tsis muaj tsheb loj (piv txwv li cov kabmob-cov kab hlau thav duab phab ntsa).
Optimal Vuam Kev Tswj Xyuas: Siv cov qes - hydrogen consumables, tsawg dua (100-150}
Post -} Weld soj ntsuam kev siv tau: Ultrasonic kuaj (ut) lees paub tsis muaj kev nrws sab hauv, thiab qis - qhov kev pab cuam tshuam weld (ntawm kev pab cuam tshuam weld / haz.
5. Cov ntawv tseem ceeb - paw soj ntsuam
Cov Cuab Yeej Cuab Yeej Cuab Yeej Cuab Yeej: Rov ua dua lub weld / haz qis {{0} kev ntsuas kub kom paub meej (ntau dua lossis sib npaug lossis sib npaug ntawm 27 yam kev sib luag ntawm 27 yam kev sib luag ntawm 27 yam kev sib luag ntawm 27 yam kev sib luag ntawm 27 yam kev sib luag ntawm 27 yam kev sib luag ntawm kev pabcuam TEMP).
Tsis - kev sim tshuaj ntsuam (ndt): Rov ua dua cov UT / MT ntawm Welds kom pom cov kab nrib pleb tsim thaum pwht (piv txwv li, los ntawm cov neeg muaj cua sov / txias).
