Taw qhia rau Kev Paub Txog Kev Paub thiab Tshuab ntawm Submerged Arc Vuam

Hluav taws xob arc:ib qho muaj zog thiab tsis tu ncua cov pa paug tshwm sim nyob rau hauv uas muaj qee qhov hluav taws xob ntawm qhov zoo thiab qhov tsis zoo electrodes, thiab cov roj nruab nrab ntawm ob lub electrodes yuav tsum nyob rau hauv lub xeev ionized. Thaum igniting ib vuam arc, feem ntau yog ua los ntawm kev sib txuas ob electrodes (ib tug electrode yog lub workpiece thiab lwm yam electrode yog muab tub lim hlau hlau los yog vuam pas nrig) ​​mus rau lub hwj chim mov, luv luv hu thiab ceev sib cais. Thaum ob lub electrodes tuaj rau hauv kev sib cuag nrog ib leeg, ib qho luv luv Circuit Court tshwm sim, tsim ib qho arc. Txoj kev no hu ua hu rau arcing. Tom qab lub arc yog tsim, tsuav yog lub hwj chim mov tswj ib tug tej yam muaj peev xwm sib txawv ntawm ob tug ncej, lub combustion ntawm lub arc yuav khaws cia.

Arc yam ntxwv:Tsis tshua muaj hluav taws xob, siab tam sim no, kub kub, siab zog ceev, zoo txav, thiab lwm yam. Feem ntau, ib tug voltage ntawm 20-30V muaj peev xwm tuav ruaj khov combustion ntawm arc, thiab tam sim no nyob rau hauv lub arc tuaj yeem nyob ntawm kaum mus rau txhiab amperes kom tau raws li. welding yuav tsum tau sib txawv workpieces. Qhov kub ntawm lub arc tuaj yeem ncav cuag tshaj 5000K thiab tuaj yeem yaj ntau yam hlau.

Arc muaj pes tsawg leeg:cathode zone, anode zone, thiab arc kem cheeb tsam.

Arc welding zog qhov chaw:Lub zog siv rau vuam arc yog hu ua arc vuam fais fab, uas feem ntau tuaj yeem muab faib ua plaub pawg: AC arc vuam fais fab, DC arc vuam fais fab, mem tes arc vuam fais fab, thiab inverter arc vuam fais fab qhov chaw.

DC kev sib txuas zoo: Thaum siv lub tshuab DC vuam siv los txuas lub workpiece mus rau lub anode thiab vuam pas nrig rau cathode, nws yog hu ua DC zoo txuas. Lub sij hawm no, lub workpiece yog rhuab ntau dua thiab haum rau vuam tuab thiab loj workpieces;

DC rov qab kev twb kev txuas:Thaum lub workpiece txuas nrog lub cathode thiab vuam pas nrig txuas nrog lub anode, nws yog hu ua DC rov qab txuas. Lub sijhawm no, cov khoom ua haujlwm tsis tshua muaj cua sov thiab haum rau vuam nyias thiab me me workpieces. Thaum siv AC vuam tshuab rau vuam, tsis muaj teeb meem ntawm kev sib txuas zoo lossis tsis zoo vim yog qhov sib hloov ntawm ob tus ncej.

Cov txheej txheem metallurgical ntawm vuam muaj kev sib cuam tshuam ntawm cov kua hlau, slag, thiab roj hauv cov txheej txheem arc vuam, uas yog cov txheej txheem ntawm cov hlau remelting. Txawm li cas los xij, vim qhov tshwj xeeb ntawm kev siv vuam, cov txheej txheem vuam chemical metallurgy muaj cov yam ntxwv sib txawv ntawm cov txheej txheem smelting.

Ua ntej, metallurgical kub ntawm vuam yog siab, theem ciam teb yog loj, thiab cov tshuaj tiv thaiv ceev yog siab. Thaum huab cua nkag mus rau hauv arc, cov kua hlau yuav ua rau muaj zog oxidation thiab nitriding cov tshuaj tiv thaiv, nrog rau ntau cov hlau evaporation. Cov dej hauv huab cua, nrog rau cov hydrogen atoms decomposed los ntawm cov roj, xeb, thiab dej hauv qhov chaw ua haujlwm thiab cov khoom siv vuam ntawm qhov kub arc siab, tuaj yeem yaj mus rau hauv cov kua hlau, uas ua rau txo qis hauv kev sib koom ua ke thiab tawv (hydrogen). embrittlement), thiab txawm tias tsim cov kab nrib pleb.

Thib ob, lub vuam pas dej yog me me thiab txias sai, ua rau nws nyuaj rau ntau yam metallurgical cov tshuaj tiv thaiv kom ncav cuag equilibrium. Cov tshuaj muaj pes tsawg leeg ntawm cov weld yog tsis sib npaug, thiab cov pa roj, oxides, thiab lwm yam hauv lub pas dej ua ke tsis tuaj yeem ntab tawm hauv lub sijhawm, uas tuaj yeem yooj yim tsim qhov tsis xws luag xws li pores, slag inclusions, thiab txawm tawg.

Thaum lub sij hawm arc vuam txheej txheem, cov kev ntsuas hauv qab no feem ntau yog:

• Thaum lub sij hawm vuam txheej txheem, txhua yam kev tiv thaiv yog muab rau cov hlau molten kom cais nws ntawm huab cua. Muaj peb txoj kev tiv thaiv: roj tiv thaiv, tiv thaiv slag, thiab roj slag ua ke tiv thaiv.

(2) Metallurgical kev kho ntawm lub vuam pas dej ua ke feem ntau yog ua los ntawm kev ntxiv ib co deoxidizer (feem ntau manganese hlau thiab silicon hlau) thiab ib co ntawm cov alloying ntsiab rau vuam cov ntaub ntawv (electrode txheej, vuam hlau, flux), nyob rau hauv txiav txim kom tshem tawm FeO los ntawm lub pas dej ua ke thaum lub sij hawm vuam txheej txheem thiab them nyiaj rau qhov poob ntawm alloying ntsiab. Hom arc vuam txoj kev

Submerged arc welding yog ib txoj kev siv hluav taws xob melting electrode uas siv granular flux ua qhov nruab nrab tiv thaiv thiab nkaum cov arc hauv qab txheej flux. Cov txheej txheem vuam ntawm submerged arc vuam muaj peb kauj ruam:

1. sib npaug tso nyiaj txaus granular flux ntawm qhov sib koom ua ke yuav tsum tau welded ntawm lub workpiece;
2. Txuas ob theem ntawm vuam fais fab mov mus rau lub conductive nozzle thiab vuam daim feem los tsim vuam arc;
3. Tsis siv neeg pub lub vuam hlau thiab txav lub arc mus nqa tawm vuam.

Cov yam ntxwv tseem ceeb ntawm submerged arc vuam yog raws li nram no:

1. Unique arc kev ua tau zoo

• Lub vuam zoo, zoo slag rwb thaiv tsev thiab huab cua tiv thaiv nyhuv, lub ntsiab tivthaiv ntawm lub arc cheeb tsam yog CO2, cov nitrogen thiab oxygen cov ntsiab lus nyob rau hauv lub vuam hlau yog heev txo, lub vuam tsis tau hloov kho, lub arc taug kev yog mechanized, lub molten. pas dej ua ke muaj nyob rau lub sij hawm ntev, cov tshuaj tiv thaiv metallurgical txaus, cua tsis kam yog muaj zog, yog li cov weld muaj pes tsawg leeg yog ruaj khov thiab txhua yam khoom zoo;
• Kev ua haujlwm zoo thiab kev sib cais slag arc teeb yog qhov zoo rau kev ua haujlwm vuam; Mechanized taug kev ua rau muaj kev siv zog qis dua.

2. Lub arc kem hluav taws xob teb lub zog yog siab dua li cov roj hlau arc vuam, thiab nws muaj cov yam ntxwv hauv qab no:

• cov khoom siv kho kom haum zoo. Vim lub zog hluav taws xob muaj zog, qhov rhiab heev ntawm kev hloov kho tsis siv neeg siab dua, uas txhim kho kev ruaj ntseg ntawm cov txheej txheem vuam;
• Qhov kev txwv qis ntawm vuam tam sim no kuj yog siab.

3. Vim lub luv luv conductive ntev ntawm vuam hlau, qhov tam sim no thiab tam sim no ceev yog ho nce, uas ua rau muaj ntau lawm efficiency. Qhov no zoo heev txhim kho lub peev xwm nkag mus arc thiab qhov tso nyiaj ntawm cov hlau vuam; Vim lub thermal rwb thaiv tsev nyhuv ntawm flux thiab slag, tag nrho cov thermal efficiency yog zoo heev, uas ua rau ib tug tseem ceeb nce nyob rau hauv vuam ceev.

Scope ntawm kev siv:

Vim yog qhov tob tob, kev tsim khoom siab, thiab qib siab ntawm kev ua haujlwm ntawm cov khoom siv sib txuas ntawm cov khoom siv arc vuam, nws tsim nyog rau vuam ntev welds ntawm nruab nrab thiab tuab phaj qauv. Nws muaj ntau yam kev siv hauv nkoj tsim, boiler thiab siab nkoj, choj, tshuab hnyav, nuclear fais fab nroj tsuag cov qauv, marine qauv, riam phom thiab lwm yam manufacturing sectors, thiab yog ib tug ntawm cov feem ntau siv vuam txoj kev nyob rau hauv vuam ntau lawm niaj hnub no. Ntxiv nrog rau kev siv rau kev sib txuas cov khoom hauv cov qauv hlau, submerged arc welding tuaj yeem tuaj yeem vuam hnav-tiv taus lossis corrosion-resistant alloy txheej txheej ntawm lub hauv paus hlau. Nrog rau txoj kev loj hlob ntawm vuam metallurgy thev naus laus zis thiab vuam khoom siv thev naus laus zis, cov ntaub ntawv uas tuaj yeem welded los ntawm submerged arc vuam tau hloov zuj zus los ntawm cov qauv hlau rau cov hlau tsis tshua muaj hlau, cov hlau tsis muaj steel, cov hlau tsis muaj zog, thiab qee cov hlau tsis muaj hlau. xws li npib tsib xee raws alloys, titanium alloys, tooj liab alloys, thiab lwm yam.

Vim nws tus yam ntxwv, nws daim ntawv thov kuj muaj qee yam kev txwv, feem ntau yog vim:

• welding txoj hauj lwm txwv. Vim yog khaws cia ntawm cov flux, submerged arc vuam yog tsuas yog siv rau vuam kab rov tav thiab downward txoj hauj lwm welds yam tsis muaj kev ntsuas tshwj xeeb, thiab tsis tuaj yeem siv rau kab rov tav, ntsug, thiab nce vuam.
• Qhov kev txwv ntawm cov khoom siv vuam yog tias lawv tsis tuaj yeem welding heev oxidizing hlau thiab alloys xws li txhuas thiab titanium, thiab tsuas yog siv rau vuam ferrous hlau;
• Tsuas yog tsim nyog rau vuam thiab txiav ntev welds, thiab tsis tuaj yeem welds nrog txwv spatial txoj haujlwm;
• Tsis tuaj yeem ncaj qha saib lub arc;

(5) Tsis haum rau nyias phaj thiab tsis tshua muaj vuam tam sim no.