Petrochemical kev tsim kho ntawm stainless hlau yeeb nkab nyob rau hauv weld, weld nto thiab tshav kub-tshuaj lom cheeb tsam yog ib qho yooj yim rau oxidize discoloration, nyob rau hauv thiaj li yuav xyuas kom meej corrosion kuj ntawm stainless hlau, lub weld tom qab vuam pickling passivation kev kho mob, thiaj li hais tias lub nto ntawm lub tsim. ntawm ib txheej tuab ntawm oxidized zaj duab xis, tab sis sab hauv ntawm cov yeeb nkab stainless hlau thiab feem ntau tsis tuaj yeem de pickled thiab passivated, uas ua rau txo qis.corrosion kuj ntawm stainless hlau yeeb nkab sab hauv. Cov txheej txheem vuam dav dav thiab kev tsim kho kev ntsuas ua rau nws nyuaj los xyuas kom meej qhov vuam zoo ntawm lub nraub qaum weld channel thiab tshav kub cuam tshuam, yog li nws yog qhov tsim nyog los txhim kho cov txheej txheem vuam thiab ntsuas kev tiv thaiv rov qab oxidation discoloration.
Stainless hlau yeeb nkab vuam rov qab, qhov saum npoo yog yooj yim rau oxidize vim kev tsom xam
(1) sab nraum qab ntawm argon tiv thaiv, huab cua nyob rau hauv lub raj muaj ib tug vortex zoo li lub zog uas yog ib qho nyuaj rau tag nrho cov pa tawm, txawm hais tias nws yuav ncua sij hawm hloov, nyob rau hauv lub qhov ncauj ntawm tag nrho cov kaw lub xeev thaum cov ntsiab lus oxygen. tuaj yeem ncav cuag<0.01% (v/v), but open the bevel after the start of the welding, the oxygen content will rise to 0.05% (v/v), or even higher. The higher oxygen content eventually leads to oxidation of the back surface of the weld bead and turns it blue or purple.
(2) Hauv kev tsim kho, welders feem ntau siv khawb arc ntawm qhov yooj yim argon arc vuam torch, lub teeb no yog nyob rau hauv vuam arc tom qab so kom qhov kub ntawm qhov vuam channel tam sim poob argon tiv thaiv, ua rau txhua lub sij hawm arc. Cov pob qij txha yog yooj yim rau oxidize thiab discoloration.
(3) Txhua zaus cov pob qij txha arc, vim huab cua los ntawm qhov qhib vuam bevel rau hauv lub qhov ncauj, lub sijhawm no tsuas yog lub qhov ncauj ntawm cov ntsiab lus ntawm cov pa oxygen siab, qhov kub-kub weld channel yooj yim rau hauv zos oxidation.
(4) Nyob rau hauv qhov muab tub lim thiab npog txheej vuam, vuam tam sim no loj dua, vuam cov khoom siv hluav taws xob, lossis kub kub ntawm txheej txheej, sab nraub qaum ntawm vuam channel yuav oxidize thiab discolor.
(5) argon tsawg purity, siab oxygen cov ntsiab lus ntawm kev tiv thaiv cov nyhuv ntawm weld ua phem.
(6) Stainless hlau thermal conductivity tsis zoo, rau 1/3 ntawm cov hlau, cov cua sov hauv qhov vuam tsis tawm, ua rau qhov kub siab dua ntawm cov vuam channel thiab cov cua sov ua rau thaj tsam, uas yog feem ntau yuav raug oxidized.
Vuam txheej txheem txhim kho
(1) Cov pa oxygen hauv cov pa tiv thaiv hauv lub qhov ncauj yog lub ntsiab ua rau oxidation thiab discoloration ntawm weld channel thiab tshav kub-cuam tshuam cheeb tsam, yog li kev tshem tawm cov pa oxygen hauv cov roj tiv thaiv tuaj yeem daws qhov teeb meem oxidation. Txhim kho cov txheej txheem tom qab siv 99.999 feem pua purity ntawm high-purity argon ua cov roj vuam, nrog cov roj sib tov (5 feem pua H2 ntxiv rau 95 feem pua Ar) raws li lub nraub qaum ntawm cov roj tiv thaiv, kev siv cov hydrogen thiab oxygen ntawm qhov siab. kub nyob rau hauv cov tshuaj tiv thaiv kom txo tau cov ntsiab lus oxygen ntawm lub raj.
(2) argon ceev tshaj huab cua, hloov cov huab cua hauv lub raj, siv lub hauv paus ntsiab lus ntawm kev ua kom tsis tshua muaj siab thiab tso tawm siab, thaum tsim nyog ncua lub sijhawm hloov roj.
(3) kev siv tam sim no qeeb qeeb, tam sim no attenuation, roj thaum ntxov, lag nres roj kev ua haujlwm ntawm lub vuam, thiab cov phom loj arc vuam. Nyob rau hauv thawj arc, qhov hluav taws kub arc thawj zaug hlawv roj tiv thaiv nyob rau hauv cov pa oxygen, kom tsis txhob oxidation ntawm weld ob leeg arc, nyob rau hauv lub arc tom qab high-kub weld channel tseem nyob rau hauv kev tiv thaiv zoo ntawm argon, los tiv thaiv cov pob qij txha ntawm lub arc. hauv zos oxidation thiab discoloration.
(4) Ua kom txoj kab uas hla ntawm lub nozzle, kev siv φ10 ~ φ12mm nozzle, ua kom muaj kev tiv thaiv ntau dua.
5) Seal lub bevel nrog tin foil daim kab xev nrog zoo sealing kev ua tau zoo, tsis yog daim kab xev.
(6) Rau qhov kawg sib koom kaw kom txo tau cov roj argon, nws yog qhov zoo tshaj plaws los siv cov roj argon roj ntws tsis hloov, ib sab ntawm txoj kev qhib qhov hluav taws xob ntawm vuam tau zoo tshaj plaws.
(7) Inter-channel thiab inter-txheej txheej kub tswj tsis pub tshaj 60 degree, welding tseem tuaj yeem coj mus rau ob sab ntawm lub vuam qhwv nrog cov dej txias txias cov raj tooj liab lossis paj rwb ntub ntaub qhwv ib ncig ntawm ob sab ntawm lub vuam channel kom txias. down, txo qhov kub ntawm qhov vuam channel nyob rau lub sijhawm.
(8) Thawj peb txheej ntawm cov khoom siv hluav taws xob me me argon arc vuam, thaum txuas ntxiv mus rau lub qhov ncauj ntawm kev tiv thaiv argon, ncav cuag ib qho tuab thiab tom qab ntawd siv cov electrode vuam. Txawm hais tias nws yog argon arc vuam lossis electrode arc vuam, tam sim no me me raws li qhov ua tau, siv txoj kab ncaj nraim taug kev lossis micro-swinging txoj kev thauj cov arc, txhawm rau kom ntseeg tau qhov zoo ntawm vuam nyob rau hauv qhov chaw ntawm vuam ceev. sai dua qhov zoo dua, txhawm rau txo cov cua sov nkag ntawm vuam, kom tsis txhob oxidation ntawm vuam channel kub siab dhau.
Hauv kev tsim cov tshuaj cog qoob loo, cov kav hlau stainless tom qab vuam tsis tuaj yeem nyob rau hauv cov yeeb nkab pickling passivation kev kho mob, thiab vuam thiab tsis tso cai rau lub vuam channel nto oxidation, qhov yuav tsum tau ntawm vuam channel thiab tshav kub-mob qhov chaw xim yuav tsum yog silver- dawb. Hauv kev tsim kho cov txheej txheem saum toj no ntsuas tom qab vuam, kom ua tau raws li tus qauv tsim thiab tus tswv yuav tsum tau ua, kom ntseeg taucorrosion kuj ntawm stainless hlau piping. Yog tias koj muaj kev xav tau, thov hu rau peb tam sim no! Email:sxthsteel@sxth-group.com
