Q: Dab tsi yog qhov kev laus ua haujlwm ntawm galvanized kauj? Vim li cas nws cuam tshuam rau cov khoom siv?
A: Kev laus ua haujlwm ntawm galvanized kauj yog hais txog lub peev xwm ntawm cov ntawv hlau galvanized los tiv thaiv cov kev hloov hauv nws cov khoom siv kho tshuab (tshwj xeeb tshaj yog lub zog thiab lub zog tensile) dhau sijhawm thaum lub sijhawm khaws cia lossis siv hauv chav sov. Kev laus feem ntau tshwm sim raws li kev ua kom muaj zog ntxiv thiab txo qis elongation, ua rau txiv kab ntxwv tev kev ntxhib los mos, kab txaij, thiab txawm tawg thaum lub sij hawm stamping los yog tsim. Yog li ntawd, kev laus tsis kam cuam tshuam ncaj qha rau kev ua haujlwm ruaj khov ntawm qhov sib sib zog nqus- kos cov khoom siv hauv tsheb, khoom siv hauv tsev, thiab lwm yam khoom.
Q: Yuav ua li cas zoo yog qhov kev laus tsis kam ntawm cov coils zoo tib yam galvanized? Dab tsi yog qhov tseem ceeb cuam tshuam rau nws?
A: Kev laus ua haujlwm ntawm cov khaub thuas zoo tib yam - dov galvanized coils feem ntau tsis zoo. Qhov laj thawj tseem ceeb yog tias carbon thiab nitrogen atoms yaj hauv cov hlau maj mam diffuse mus rau qhov chaw dislocation ntawm chav tsev kub, ua rau Cotillard atmospheres, ua rau muaj qhov nce hauv qhov taw tes. Carbon muaj qhov cuam tshuam loj dua. Yog hais tias lub substrate yog aluminium-tua hlau, nws cov ntsiab lus ntawm nitrogen yaj yog siab dua, thiab cov laus nyiam tshaj tawm. Txawm li cas los xij, siv interstitial -dawb (IF) steel substrates nrog niobium los yog titanium microalloying ho txhim kho kev laus tiv thaiv vim tias carbon thiab nitrogen tau ruaj khov.
Q: Puas yog cov txheej txheem galvanizing nws tus kheej (xws li annealing kub thiab post-galvanizing txias npaum li cas) hloov cov aging kuj ntawm galvanized coils?
A: Yog. Qhov kub annealing, annealing lub sij hawm, thiab post-galvanizing txias npaum li cas nyob rau hauv ib tug nruam kub-dip galvanizing ntau lawm kab cuam tshuam rau nag lossis daus ntawm carbonitrides nyob rau hauv cov hlau. Yog tias qhov txias tom qab annealing qeeb dhau lawm, nws yuav ua rau muaj kev laus dhau -, txhawb nqa carbonitride nag lossis daus, yog li txo cov concentration ntawm cov tshuaj atoms thiab txhim kho kev laus. Conversely, ceev ceev txias yuav khaws ntau cov kua atoms, deteriorating aging kuj. Tsis tas li ntawd, kev ua tiav (leveling) txheej txheem tom qab galvanizing yuav tsim ib qho nyiaj ntawm cov khoom siv mobile. Kev ua tiav tiav tiav tuaj yeem txhim kho kev laus ib ntus, tab sis kev laus tseem tuaj yeem tshwm sim tom qab ntev - lub sijhawm cia.
Q: Yuav ua li cas los ntsuas lossis ntsuas qhov kev laus ntawm galvanized coils? Puas muaj tej yam kev qhia qhia?
A: Kev ntsuam xyuas kev laus feem ntau yog siv los ntsuas. Piv txwv li, cov qauv galvanized coil tau tuav ntawm 100℃rau 1 teev lossis ntawm 120℃rau 30 feeb, thiab tom qab ntawd lawv cov txiaj ntsig lub zog elongation raug ntsuas los yog cov txiaj ntsig siab ntawm tensile specimens raug soj ntsuam. Cov ntaub ntawv uas muaj kev laus ua haujlwm zoo qhia tau tias me me ntawm cov khoom muaj zog tom qab kev kho mob no (piv txwv li, tsawg dua 30 MPa) thiab tsis muaj qhov tseem ceeb yield plateau. Kev lag luam tsheb feem ntau xav tau cov ntawv galvanized kom ruaj khov kev laus tsis pub dhau 6 lub hlis ntawm kev cia, thiab qee qhov siab -qhov kawg yuav tsum tau ntau tshaj 12 lub hlis. Cov cim qhia tshwj xeeb suav nrog Aging Index (AI); qhov qis dua tus nqi AI, qhov zoo dua qhov kev laus tiv thaiv.
Q: Hauv cov ntawv thov kev tsim vaj tsev, kev laus ua haujlwm ntawm galvanized coils zoo npaum li cas? Cov neeg siv yuav tsum xaiv li cas?
A: Nws tsis tuaj yeem hais dav dav; nws nyob ntawm lub hauv paus steel thiab daim ntawv thov. Rau galvanized coils siv hauv cov qauv zoo tib yam lossis rau kev khoov yooj yim, qhov cuam tshuam ntawm kev laus yog qhov tsawg thiab tuaj yeem suav tias txaus. Txawm li cas los xij, rau siab -nto- qhov chaw zoo uas xav tau kev kos duab sib sib zog nqus, xws li tsheb sab nrauv thiab cov khoom siv vaj huam sib luag, qhov kev laus tsis kam ntawm cov coils zoo tib yam galvanized yog tsis txaus. IF steel, ultra- carbon steel qis, lossis galvanized coils uas tau ua haujlwm ruaj khov (xws li cov ntawv galvanized nrog Ti thiab Nb ntxiv) yuav tsum raug xaiv. Yog tias cov neeg siv twb tau yuav cov coils zoo tib yam galvanized, nws raug nquahu kom siv lawv hauv peb lub hlis, lossis ua ntej -deformation lossis qis- kub annealing ua ntej siv los tshem tawm cov teebmeem ntawm kev laus. Yog li ntawd, kev soj ntsuam cov kev laus ntawm cov galvanized coils nyob ntawm seb lawv phim cov kev tsim thiab kev cia lub voj voog ntawm cov khoom tshwj xeeb.