Austenitic stainless hlau electrode xaiv cov ntsiab lus:
Stainless hlau yog tsuas yog siv rau corrosion kuj, tab sis kuj siv raws li cov cua kub-resistant steel thiab tsawg-kub steel. Yog li ntawd, thaum welding stainless hlau, kev ua tau zoo ntawm cov electrode yuav tsum ua raws li lub hom phiaj ntawm cov hlau tsis muaj steel. Stainless hlau electrodes yuav tsum tau xaiv raws li lub hauv paus hlau thiab kev ua hauj lwm tej yam kev mob (xws li ua hauj lwm kub thiab hu rau nruab nrab, thiab lwm yam).
1. Lub vuam hlau ntawm austenitic stainless hlau yuav tsum xyuas kom meej cov khoom siv. Qhov no tuaj yeem raug txheeb xyuas los ntawm kev tsim nyog txheej txheem vuam.
2. Vim tias cov ntsiab lus ntawm cov pa roj carbon monoxide muaj kev cuam tshuam zoo rau kev tiv thaiv corrosion ntawm stainless hlau, stainless hlau electrode uas nws cov ntsiab lus ntawm cov hlau deposited tsis siab tshaj ntawm cov hlau puag feem ntau xaiv. Piv txwv li, A022 electrode yuav tsum tau siv rau 316L.
3. Feem ntau hais lus, kev xaiv ntawm vuam pas nrig tuaj yeem xa mus rau cov khoom siv ntawm lub hauv paus hlau, thiab xaiv cov welding pas nrig nrog tib yam lossis zoo sib xws ntawm cov hlau puag. Piv txwv li: A102 sib raug rau 0Cr19Ni9; A137 sib raug rau 1Cr18Ni9Ti.
4. Rau cov cua sov-resistant stainless hlau (austenitic heat-resistant steel) ua hauj lwm ntawm qhov kub thiab txias, cov electrode xaiv yuav tsum muaj peev xwm ua tau raws li thermal tawg tsis kam ntawm cov hlau welded thiab qhov kub thiab txias kev ua tau zoo ntawm cov welded sib koom.
(1) Rau austenitic tshav kub-resistant steel nrog Cr/Ni Ntau dua los yog sib npaug rau 1, xws li 1Cr18Ni9Ti, thiab lwm yam, austenitic-ferritic stainless hlau electrodes feem ntau yog siv, thiab nws yog advisable siv 2-5 ferrite nyob rau hauv lub vuam hlau. Thaum cov ntsiab lus ferrite tsawg dhau, qhov tawg tsis kam ntawm cov hlau vuam tsis zoo; yog tias nws siab dhau lawm, σ embrittlement theem yog yooj yim tsim thaum siv mus sij hawm ntev ntawm qhov kub thiab txias los yog kev kho cua sov, ua rau tawg. Xws li A002, A102, A137.
Hauv qee daim ntawv thov tshwj xeeb, yuav tsum muaj cov hlau austenitic tag nrho, electrodes xws li A402 thiab A407 tuaj yeem siv.
(2) Rau ruaj khov austenitic kub-resistant steels nrog Cr / Ni<1, such="" as="" cr16ni25mo6,="" etc.,="" it="" is="" generally="" necessary="" to="" increase="" the="" mo,="" w,="" w,="" etc.="" the="" content="" of="" elements="" such="" as="" mn="" can="" improve="" the="" crack="" resistance="" of="" the="" weld="" while="" ensuring="" the="" thermal="" strength="" of="" the="" weld="" metal.="" such="" as="" using="" a502,="">
5. Rau corrosion-resistant stainless hlau ua hauj lwm nyob rau hauv ntau yam corrosive xov xwm, lub electrode yuav tsum tau xaiv raws li qhov nruab nrab thiab ua hauj lwm kub, thiab nws cov corrosion kuj yuav tsum tau guaranteed (ua qhov kev ntsuam xyuas corrosion ntawm welded pob qij txha).
(1) Rau qhov nruab nrab nrog kev ua haujlwm kub siab tshaj 300 degree thiab muaj zog corrosiveness, nws yog ib qho tsim nyog yuav tsum tau siv cov khoom ruaj khov uas muaj Ti lossis Nb lossis cov pa roj carbon tsawg tsawg. Xws li A137 lossis A002 thiab lwm yam.
(2) Rau nruab nrab uas muaj dilute sulfuric acid los yog hydrochloric acid, stainless hlau electrodes uas muaj Mo los yog Mo thiab Cu feem ntau siv, xws li: A032, A052, thiab lwm yam.
(3) Rau kev ua haujlwm, cov khoom siv uas tsis muaj zog corrosion lossis tsuas yog kom tsis txhob xeb ua paug, stainless hlau electrodes tsis muaj Ti lossis Nb tuaj yeem siv.
Txhawm rau kom ntseeg tau tias muaj kev ntxhov siab corrosion ntawm cov hlau weld, cov khoom siv hluav taws xob super-alloyed, uas yog, cov ntsiab lus ntawm corrosion-resistant alloying ntsiab lus (Cr, Mo, Ni, thiab lwm yam) nyob rau hauv cov hlau weld yog siab tshaj qhov ntawd. ntawm lub hauv paus hlau. Piv txwv li, 00Cr19Ni10 weldments yog welded nrog 00Cr18Ni12Mo2 hom vuam consumables (xws li A022).
6. Rau austenitic stainless hlau ua haujlwm ntawm qhov kub thiab txias, qhov kub tsis tshua muaj kev cuam tshuam toughness ntawm welded sib koom ntawm qhov kev pab cuam kub yuav tsum tau lav, yog li cov ntshiab austenitic electrode yog siv. Xws li A402, A407.
7. Nickel-based alloy electrodes kuj tseem siv tau. Piv txwv li, Mo6 hom austenitic stainless hlau yog welded nrog nickel-raws li vuam consumables mus txog Mo 9.
8. Xaiv hom electrode txheej:
(1) Txij li thaum ob-theem austenitic steel weld hlau nws tus kheej muaj qee yam ntawm ferrite, nws muaj cov yas zoo thiab tawv. Los ntawm qhov kev xav ntawm weld hlau tawg tsis kam, cov txheej txheem yooj yim thiab cov titanium calcium txheej yog muab piv. Qhov sib txawv rau electrodes tsis yog qhov ua rau cov pa roj carbon steel electrodes. Yog li ntawd, nyob rau hauv cov ntaub ntawv siv, peb tsom ntau dua rau cov txheej txheem vuam, thiab lawv feem ntau siv electrodes nrog txheej txheej code 17 lossis 16 (xws li A102A, A102, A132, thiab lwm yam).
(2) Tsuas yog thaum cov txheej txheem rigidity siab heev los yog cov kab nrib pleb ntawm cov hlau tsis zoo (xws li qee cov martensitic chromium stainless hlau, ntshiab austenitic chromium-nickel stainless hlau, thiab lwm yam), kev siv cov txheej txheem 15 yuav tsum yog. xav txog. Basic coated stainless hlau electrodes (xws li A107, A407, thiab lwm yam).
Raws li qhov tshwm sim, kev vuam ntawm austenitic stainless hlau muaj nws cov yam ntxwv tshwj xeeb, thiab kev xaiv cov electrodes rau vuam ntawm austenitic stainless hlau yog qhov tshwj xeeb tshaj yog tsim nyog. Tsuas yog nyob rau hauv txoj kev no tuaj yeem sib txawv txoj kev vuam thiab electrodes ntawm cov khoom sib txawv yuav raug siv rau cov khoom sib txawv. Cov electrode yuav tsum raug xaiv raws li lub hauv paus hlau thiab kev ua haujlwm (nrog rau kev ua haujlwm kub thiab kev sib cuag nruab nrab, thiab lwm yam). Tsuas yog nyob rau hauv txoj kev no tuaj yeem ua tiav qhov kev xav tau vuam zoo.
Nyob rau hauv cov txheej txheem welding, nws yog ib qho tsim nyog los xaiv qhov tsim nyog vuam hlau. Cov phaj sib txawv muaj cov kev xav tau sib txawv rau cov vuam hlau, thiab nws yog ib qho tsim nyog los xaiv cov vuam hlau uas phim cov compression thiab tensile muaj peev xwm.