15. Lub luag haujlwm tseem ceeb ntawm cov roj vuam hmoov yog dab tsi?
Lub luag haujlwm tseem ceeb ntawm vuam hmoov yog tsim cov slag, uas ua rau cov hlau oxides lossis cov hlau tsis huv hauv lub pas dej molten los tsim cov slag molten. Nyob rau tib lub sij hawm, lub generated molten slag npog lub molten pas dej ua ke thiab cais lub molten pas dej ua ke los ntawm huab cua, yog li tiv thaiv lub molten pas dej ua ke hlau los ntawm oxidized nyob rau hauv high kub.
16. Dab tsi yog cov txheej txheem ntsuas los tiv thaiv weld porosity hauv phau ntawv arc vuam?
teb:
(1) Lub vuam pas nrig thiab flux yuav tsum tau khaws cia kom qhuav thiab qhuav raws li cov cai ua ntej siv;
(2) Qhov chaw ntawm vuam hlau thiab vuam yuav tsum huv thiab tsis muaj dej, roj, xeb, thiab lwm yam.
(3) Kev xaiv vuam tshwj xeeb, xws li vuam tam sim no yuav tsum tsis txhob loj dhau, qhov vuam ceev yuav tsum tsim nyog, thiab lwm yam;
(4) Siv cov txheej txheem vuam kom raug, siv alkaline electrodes rau tes arc vuam, luv luv arc vuam, txo lub viav vias amplitude ntawm cov electrode, qeeb tus pas nrig thauj ceev, tswj luv arc arc pib thiab kaw, thiab lwm yam.;
(5) Tswj qhov sib dhos qhov sib txawv ntawm cov welds kom tsis txhob loj dhau;
(6) Tsis txhob siv cov electrodes uas cov coatings yog tawg, tev tawm, deteriorated, eccentric los yog corroded vuam cores.
17. Dab tsi yog qhov kev ntsuas tseem ceeb los tiv thaiv cov pob dawb thaum vuam cam khwb cia hlau?
teb:
(1) Siv graphitized vuam rods, uas yog, siv cam khwb cia hlau welding rods nrog ib tug loj npaum li cas ntawm graphitizing ntsiab (xws li carbon, silicon, thiab lwm yam.) ntxiv rau cov xim los yog vuam hlau, los yog siv nickel-based thiab tooj liab-raws li. cam khwb cia hlau welding rods;
(2) Preheat ua ntej vuam, tswj cov cua sov thaum vuam, thiab maj mam txias tom qab vuam kom txo tau qhov txias ntawm qhov vuam cheeb tsam, ncua sij hawm lub fusion cheeb tsam nyob rau hauv lub liab-kub lub xeev, tag nrho graphitize, thiab txo thermal stress;
(3) Siv cov txheej txheem brazing.
18. Piav qhia lub luag haujlwm ntawm flux hauv cov txheej txheem vuam?
Hauv vuam, flux yog qhov tseem ceeb los xyuas kom meej vuam zoo. Nws muaj cov haujlwm hauv qab no:
(1) Tom qab cov flux melts, nws ntab rau saum npoo ntawm cov hlau molten los tiv thaiv lub pas dej molten thiab tiv thaiv kev yaig los ntawm cov pa phem hauv huab cua.
(2) Lub flux muaj lub luag haujlwm ntawm deoxidizing thiab alloying, thiab koom tes nrog cov vuam hlau kom tau txais cov tshuaj muaj pes tsawg leeg thiab cov khoom siv ntawm cov hlau vuam.
(3) Ua kom lub vuam zoo tsim.
(4) Ua kom qis qis qis ntawm cov hlau molten thiab txo qhov tsis xws luag xws li pores thiab slag inclusions.
(5) Tiv thaiv kom tsis txhob txaws, txo qhov poob, thiab txhim kho cov vuam coefficient.
19. Dab tsi tseem ceeb yuav tsum tau saib xyuas thaum siv thiab tswj AC arc vuam tshuab?
(1) Nws yuav tsum tau siv raws li qhov ntsuas vuam tam sim no thiab lub sijhawm thauj khoom ntawm lub tshuab vuam, thiab tsis txhob overload.
(2) Lub tshuab vuam tsis raug tso cai rau luv luv rau lub sijhawm ntev.
(3) Lub regulating tam sim no yuav tsum tau ua nyob rau hauv tsis muaj load.
(4) Nco ntsoov xyuas cov xov hlau tiv tauj, fuses, hauv av, hloov kho cov cuab yeej, thiab lwm yam thiab xyuas kom lawv nyob zoo.
(5) Khaws lub tshuab vuam kom huv, qhuav thiab ua pa kom tsis txhob muaj plua plav thiab nag los ntawm kev nkag mus.
(6) Muab nws ruaj khov thiab txiav tawm lub hwj chim tom qab ua haujlwm tiav.
(7) Lub tshuab vuam yuav tsum tau kuaj xyuas tsis tu ncua.
20. Dab tsi yog qhov txaus ntshai ntawm pob txha tawg?
Teb: Vim tias cov pob txha tawg tau tshwm sim sai sai thiab tsis tuaj yeem tshawb pom thiab tiv thaiv lub sijhawm, thaum nws tshwm sim, qhov tshwm sim yuav loj heev, tsis yog tsuas yog ua rau kev poob nyiaj txiag loj, tab sis kuj ua rau tib neeg lub neej txaus ntshai. Yog li ntawd, nkig tawg ntawm welded lug yog ib qho teeb meem uas yuav tsum tau ua tiag tiag.
21. Cov yam ntxwv thiab kev siv cov tshuaj plasma?
Teb: Cov yam ntxwv ntawm cov tshuaj tsuag plasma yog qhov kub ntawm cov nplaim plasma siab thiab tuaj yeem yaj yuav luag txhua cov ntaub ntawv refractory, yog li nws tuaj yeem txau rau ntawm ntau yam khoom. Cov nplaim hluav taws xob nrawm nrawm yog siab thiab cov txiaj ntsig acceleration zoo yog qhov zoo, yog li cov txheej txheem kev sib raug zoo yog siab. Nws muaj ntau yam kev siv thiab yog txoj hauv kev zoo tshaj plaws los tsuag ntau yam khoom siv ceramic.
22. Cov txheej txheem rau kev npaj daim npav txheej txheem vuam yog dab tsi?
Teb: Qhov kev pab cuam rau kev npaj cov txheej txheem vuam daim npav yuav tsum paub txog cov txheej txheem vuam zoo sib xws raws li cov khoom sib dhos kos duab, kos duab kos duab thiab lawv cov kev xav tau, thiab kos ib daim duab sib dhos yooj yim; welding txheej txheem daim npav, tus lej kos npe, npe sib koom, Tus lej sib koom, cov txheej txheem vuam txheej txheem tsim nyog tus lej thiab cov ntaub ntawv pov thawj welder;
Npaj cov txheej txheem vuam raws li kev soj ntsuam cov txheej txheem vuam thiab cov khoom siv tiag tiag, cov khoom siv thiab kev tsim khoom; npaj cov txheej txheem vuam tshwj xeeb raws li kev ntsuas txheej txheem vuam; txiav txim siab lub koom haum soj ntsuam cov khoom, kev soj ntsuam txoj kev, thiab kev soj ntsuam piv raws li qhov yuav tsum tau ntawm cov khoom kos duab thiab cov qauv khoom. .
23. Vim li cas peb thiaj li yuav tsum tau ntxiv ib qho nyiaj ntawm silicon thiab manganese rau vuam hlau ntawm carbon dioxide gas shielded vuam?
Teb: Cov pa roj carbon dioxide yog cov roj oxidizing. Thaum lub sij hawm vuam txheej txheem, cov vuam hlau cov ntsiab lus yuav raug hlawv, yog li txo cov neeg kho tshuab cov khoom ntawm vuam zoo heev. Ntawm lawv, oxidation yuav ua rau pores thiab spatter. Ntxiv silicon thiab manganese rau lub vuam hlau. Nws muaj cov nyhuv deoxidizing thiab tuaj yeem daws cov teeb meem ntawm vuam oxidation thiab spatter.
24. Dab tsi yog qhov kev txwv tawg ntawm cov nplaim hluav taws sib xyaw, thiab dab tsi cuam tshuam rau nws?
Teb: Cov concentration ntau nyob rau hauv cov pa roj, vapor los yog hmoov av uas muaj nyob rau hauv ib tug flammable sib tov tuaj yeem tshwm sim hu ua qhov txwv tawg.
Qhov kev txwv qis ntawm qhov concentration yog hu ua qhov kev txwv qis qis, thiab qhov txwv sab saud ntawm qhov concentration yog hu ua qhov txwv kev tawg. Qhov txwv tsis pub tawg yog cuam tshuam los ntawm cov yam ntxwv xws li qhov kub thiab txias, siab, cov ntsiab lus oxygen, thiab lub taub ntim. Thaum qhov kub thiab txias nce, qhov kev txwv tawg yuav txo qis; thaum lub siab nce, qhov kev txwv tawg kuj txo; thaum lub concentration ntawm cov pa oxygen hauv cov pa sib xyaw ua ke nce, qhov kev tawg qis qis qis dua. Rau cov plua plav combustible, nws txwv kev tawg yog cuam tshuam los ntawm yam xws li dispersion, humidity, thiab kub.
25. Yuav tsum ntsuas dab tsi los tiv thaiv hluav taws xob thaum vuam nyob rau hauv boiler nruas, condensers, roj tank, roj tank thiab lwm yam hlau ntim?
Teb: (1) Thaum vuam, vuam yuav tsum tsis txhob sib cuag nrog cov hlau qhov chaw, sawv ntawm cov roj hmab insulating lev los yog hnav roj hmab insulating khau, thiab hnav khaub ncaws ua hauj lwm qhuav.
(2) Yuav tsum muaj tus neeg saib xyuas sab nraud ntawm lub thawv uas tuaj yeem pom thiab hnov qhov kev ua haujlwm ntawm lub vuam vuam, thiab hloov mus rau kev txiav tawm lub hwj chim raws li lub vuam lub teeb liab.
(3) Qhov hluav taws xob ntawm txoj kev teeb siv hauv cov thawv yuav tsum tsis pub tshaj 12 volts. Lub plhaub ntawm lub teeb hloov pauv hloov pauv yuav tsum muaj kev ntseeg siab hauv av, thiab autotransformers tsis raug tso cai siv.
(4) Transformers rau portable teeb thiab vuam transformers tsis pub nqa mus rau hauv boilers thiab hlau ntim.
26. Yuav ua li cas paub qhov txawv ntawm vuam thiab brazing? Cov yam ntxwv ntawm txhua tus yog dab tsi?
Teb: Cov yam ntxwv ntawm fusion vuam yog kev sib txuas ntawm cov atoms ntawm cov vuam qhov chaw, thaum brazing siv cov nruab nrab nruab nrab nrog qhov qis melting point tshaj qhov vuam qhov chaw - cov khoom siv brazing los txuas cov vuam qhov chaw.
Qhov kom zoo dua ntawm fusion vuam yog tias cov khoom siv ntawm cov welded sib koom ua ke yog siab, thiab cov khoom tsim tau thaum txuas cov tuab thiab qhov loj yog siab. Qhov tsis zoo yog tias qhov kev ntxhov siab thiab deformation generated yog loj, thiab cov qauv kev hloov pauv tshwm sim nyob rau hauv lub tshav kub-cuam tshuam cheeb tsam;
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Qhov zoo ntawm brazing yog qhov kub tsis tshua muaj cua sov, tiaj tus, cov pob qij txha du, zoo nkauj tsos, me me kev ntxhov siab thiab deformation. Qhov tsis zoo ntawm brazing yog qhov sib koom ua ke tsis tshua muaj zog thiab siab sib dhos sib dhos yuav tsum tau ua thaum sib dhos.
27. Cov pa roj carbon dioxide thiab argon roj yog ob qho tib si tiv thaiv roj. Thov piav qhia txog lawv cov khoom thiab kev siv?
Teb: Cov pa roj carbon dioxide yog cov roj oxidizing. Thaum siv los ua cov roj tiv thaiv hauv qhov chaw vuam, nws yuav ua rau oxidize cov tee dej thiab cov hlau hauv lub pas dej molten, ua rau kub hnyiab ntawm cov ntsiab lus alloy. Cov txheej txheem ua haujlwm tsis zoo, thiab qhov pores thiab tawg loj yuav raug tsim.
Yog li ntawd, nws tsuas yog siv tau rau vuam qis carbon steel thiab tsis tshua muaj hlau alloy tam sim no, thiab tsis haum rau vuam siab alloy hlau thiab cov hlau tsis muaj hlau, tshwj xeeb tshaj yog rau cov hlau tsis muaj steel. Txij li thaum nws yuav ua rau carbonization ntawm cov vuam thiab txo qhov tsis kam mus rau intercrystalline corrosion, nws yog siv tau tsawg.
Argon yog inert gas. Vim tias nws tsis hnov mob chemically nrog cov hlau molten, cov tshuaj lom neeg muaj pes tsawg leeg ntawm cov vuam yog qhov tsis hloov pauv. Qhov zoo ntawm qhov vuam tom qab vuam yog qhov zoo. Nws tuaj yeem siv los txuas ntau yam hlau alloys, stainless hlau thiab tsis-ferrous hlau. Vim tias tus nqi ntawm argon yog maj mam txo qis, yog li nws kuj tseem siv ntau qhov rau vuam me me hlau.
28. Piav qhia txog kev weldability thiab vuam yam ntxwv ntawm 16Mn steel?
Teb: 16Mn steel yog raws li Q235A steel nrog txog 1% Mn ntxiv, thiab cov pa roj carbon sib npaug yog 0.345% ~ 0.491%. Yog li ntawd, qhov vuam kev ua tau zoo dua.
Txawm li cas los xij, lub hardening nyiam me ntsis ntau dua li ntawm Q235A steel. Thaum vuam nrog cov tsis me me thiab cov vuam me me dhau ntawm cov tuab loj thiab cov qauv nruj, cov kab nrib pleb yuav tshwm sim, tshwj xeeb tshaj yog thaum vuam nyob rau hauv qhov kub thiab txias. Hauv qhov no, kev ntsuas tsim nyog tuaj yeem ua ua ntej vuam. hauv av preheating.
Thaum tes arc vuam, siv E50 qib electrodes; Thaum tsis siv neeg submerged arc vuam tsis xav tau beveling, koj tuaj yeem siv H08MnA vuam hlau nrog flux 431; thaum qhib bevels, siv H10Mn2 vuam hlau nrog flux 431; Thaum siv CO2 roj shielded vuam, siv vuam hlau H08Mn2SiA los yog H10MnSi.
Post lub sij hawm: Nov-06-2023
