Intermediate zaus annealing yog ib qho tseem ceeb ntawm cov cua sov- kev kho mob nyob rau hauv kev tsim cov longitudinal submerged arc welded steel kav. Nws pab kho qhov microstructure ntawm thaj chaw welded, txo cov kev ntxhov siab sab hauv, thiab txhim kho tag nrho cov tshuab ua haujlwm ntawm cov yeeb nkab tiav. Rau cov chaw tsim khoom thiab kawg- cov neeg siv hauv kev lag luam xws li roj thiab roj, kev tsim kho, kev sib txuas, thiab kev xa dej, kev nkag siab txog cov txheej txheem no yog qhov tseem ceeb rau kev ntsuas cov khoom zoo thiab kev ntseeg siab ntev ntev.
Kab lus no muab kev piav qhia dav dav ntawm cov txheej txheem nruab nrab ntawm cov txheej txheem annealing, nws cov qauv kev ua haujlwm, cov cuab yeej siv, qhov zoo, thiab nws txhawb qhov zoo ib yam ntawm LSAW steel kav. Cov ntsiab lus yog tsim los rau SEO optimization thiab haum rau kev tshaj tawm ntawm cov kws tshaj lij steel yeeb nkab tsim lub vev xaib.
Nkag siab Intermediate Frequency Annealing
Intermediate zaus annealing yog hais txog lub tshav kub hauv cheeb tsam- txoj kev kho mob uas lub tshuab cua sov induction tsim hluav taws xob hluav taws xob los ua kom sov lub vuam seam thiab cua sov- thaj tsam cuam tshuam. Lub hom phiaj yog txhawm rau tshem tawm cov kev ntxhov siab welding thiab ua kom zoo dua cov qauv nplej uas tsim thaum lub sij hawm submerged arc vuam txheej txheem.
Tsis zoo li tag nrho -length furnace annealing, intermediate zaus annealing tsom rau thaj tsam weld, ua kom tswj tau qhov kub thiab txias thiab txo qis kev siv hluav taws xob. Nws yog tshwj xeeb tshaj yog zoo rau loj - txoj kab uas hla, tuab - phab ntsa LSAW kav uas yuav tsum tau ruaj khov mechanical kev ua tau zoo nyob rau hauv cov ntaub ntawv thov.
Cov txheej txheem ua haujlwm li cas
Intermediate zaus annealing ua haujlwm ntawm lub hauv paus ntsiab lus ntawm electromagnetic induction. Thaum alternating tam sim no ntws los ntawm induction kauj, nws generates electromagnetic teb. Qhov chaw no induces eddy tam sim no raws lub weld seam, uas nyob rau hauv lem ua kom sov. Los ntawm kev kho qhov zaus thiab coil nrug, lub kaw lus heats cov hlau mus rau qhov xav tau kub ua ntej tso cai rau nws txias ntawm tus nqi tswj.
Hauv qab no yog cov txheej txheem yooj yim ntawm cov txheej txheem tsis raug.
Table 1: Cov txheej txheem tseem ceeb ntawm cov txheej txheem nruab nrab ntawm kev sib tsoo
| Parameter | Hom kab mob |
|---|---|
| Kub kub | 600-950 degree |
| Cua sov tus nqi | 40-120℃ib ob |
| Ntau zaus | 1-10 kHz |
| Ua kom muaj cua sov ntev | 150-450 hli |
Tom qab cua sov, cov yeeb nkab steel dhau mus rau theem tswj cua txias. Cov theem no yog qhov tseem ceeb vim nws txiav txim siab qhov kawg microstructure thiab txhua yam khoom ntawm thaj chaw weld.
Lub hom phiaj thiab cov txiaj ntsig ntawm Intermediate Frequency Annealing
Kev txo qis ntawm kev ntxhov siab
Vuam qhia qhov tseem ceeb thermal stress rau hauv cov hlau. Yog tias tsis tshem tawm, cov kev ntxhov siab no tuaj yeem ua rau deformation, tawg, lossis ua tsis tiav ntxov thaum lub sijhawm ua haujlwm. Annealing relieves cov kev ntxhov siab thiab stabilizes lub microstructure.
Kev txhim kho ntawm Toughness thiab Plasticity
Weld seams feem ntau muaj coarse nplej vim txias sai tom qab vuam. Intermediate zaus annealing refines cov nplej thiab txhim kho toughness, plasticity, thiab yooj, uas yog ib qho tseem ceeb rau cov kav dej ua hauj lwm nyob rau hauv siab.
Txhim kho ntawm Weld Uniformity
Los ntawm kev sib npaug ntawm qhov sib npaug ntawm qhov chaw weld thiab cov khoom siv niam txiv, annealing tsim kev hloov pauv ntau dua. Qhov no ua kom muaj kev tiv thaiv zoo dua rau kev khoov, sib sau, thiab cov khoom siv sab nraud.
Zoo dua Corrosion Resistance
Lub microstructure refined nrog txo cov kev ntxhov siab sab hauv tau txhim kho kev tiv thaiv corrosion, tshwj xeeb tshaj yog nyob rau hauv cov kav dej, dej hiav txwv, thiab kev teeb tsa faus.
Cov cuab yeej siv hauv cov txheej txheem
Cov khoom siv nruab nrab zaus annealing feem ntau muaj cov khoom siv hluav taws xob, induction coil, ntsuas qhov ntsuas kub, thiab chav txias. Cov tshuab niaj hnub no muaj kev tswj xyuas qhov kub thiab txias kom ntseeg tau tias kev ua haujlwm zoo ib yam thoob plaws txhua ntu ntawm vuam seam.
Table 2: Cov Khoom Tseem Ceeb ntawm Induction Annealing System
| Cheebtsam | Muaj nuj nqi |
|---|---|
| IF fais fab mov | Tsim kom muaj zaus thiab tam sim no |
| Induction kauj | Ua electromagnetic teb rau cua sov |
| Infrared Pyrometer | Saib xyuas -lub sijhawm ntsuas kub |
| Txias qhov system | Tswj cov cua txias kom ua tiav cov qauv xav tau |
High - tswj qhov kub thiab txias yog qhov tseem ceeb. Overheating tuaj yeem ua rau cov khoom siv tsis muaj zog, thaum cua sov tsis txaus yuav ua rau muaj kev ntxhov siab tsis tuaj yeem daws tau.
Daim ntawv thov ntawm Annealed LSAW Pipes
Intermediate zaus annealing yog dav siv nyob rau hauv zus tau tej cov steel kav siv rau:
• Cov kav dej roj thiab cov nkev
• Kev thauj mus los hauv dej
• Cov qauv tsim thiab cov hauv paus ntug dej hiav txwv
• Ntev - kis tau tus mob nyob deb
• High-siab thiab qis-kub kev lag luam
Hauv cov haujlwm uas xav tau lub neej ua haujlwm ntev thiab cov qauv kev nyab xeeb zoo ib yam, cov kav dej LSAW annealed muab kev ua tau zoo dua qub thiab txo kev pheej hmoo ntawm kev saib xyuas.
Qhov tseem ceeb hauv Kev Pov Hwm Zoo
Intermediate zaus annealing tsis yog ib qho kev xaiv tab sis ib qho kev sib txuas tseem ceeb hauv kev tswj cov saw hlau ntawm LSAW yeeb nkab ntau lawm. Cov neeg tsim khoom sib koom ua ke nrog lwm yam kev tshuaj xyuas xws li kuaj ultrasonic, ntsuas hydrostatic, thiab kev ntsuas kev ua haujlwm zoo los xyuas kom meej tias txhua cov yeeb nkab ua tau raws li cov qauv kev lag luam xws li API 5L, EN, ASTM, thiab lub teb chaws specifications.
Kev txhim kho weld toughness thiab uniformity kuj pab cov kav xa dej tiv taus huab cua ib puag ncig thiab kev ua haujlwm, suav nrog kev hloov pauv kub, hnyav hnyav, thiab cov khoom corrosive.
Xaus
Intermediate zaus annealing plays lub luag haujlwm tseem ceeb hauv kev ua kom ntseeg tau thiab ua haujlwm ntawm LSAW steel kav. Los ntawm kev tshem tawm cov kev ntxhov siab seem, kho cov qauv nplej, thiab txhim kho cov khoom sib xws, nws ua rau muaj txiaj ntsig zoo rau kev pab cuam lub neej ntawm cov kav dej thiab kev siv cov txheej txheem.
Rau cov neeg yuav khoom thoob ntiaj teb nrhiav kev ruaj khov thiab hwm zoo - cov kav hlau zoo, kev nkag siab txog cov txheej txheem no yog qhov tseem ceeb. Los ntawm kev siv thev naus laus zis thev naus laus zis thev naus laus zis thiab kev tswj cov txheej txheem nruj, cov tuam txhab ua lag luam xa cov khoom lag luam uas ua tau raws li qhov xav tau ntawm cov kav dej niaj hnub thiab kev tsim kho kev lag luam.
