Nickelthiab npib tsib xee alloys yog qhov tseem ceeb nyob rau hauv ib puag ncig hnyav vim lawv cov corrosion kuj zoo heev thiab siab - kub stability. Txawm li cas los xij, nws qhov nyuaj vuam yog ntau dua li cov pa roj carbon zoo tib yam thiab stainless hlau. Ntau cov novices hauv kev lag luam tau daig hauv cov ntsiab lus. Qhov tseeb, kev paub txog cov ntsiab lus tseem ceeb tuaj yeem zam ntau qhov kev taug.
Cia peb pib tham txog qhov yooj yim tshaj plaws saib ua ntej -welding npaj. Cov kauj ruam no ncaj qha txiav txim siab qhov ua tiav lossis tsis ua tiav ntawm vuam. Tsis muaj ib kauj ruam. Ntau tus neeg sim txuag qhov teeb meem los ntawm kev hla cov kauj ruam tu thiab vuam ncaj qha. Thaum kawg, cov kab nrib pleb thiab pores tshwm, thiab lawv tsis paub qhov teeb meem nyob qhov twg. Cov txheej oxide nyob rau saum npoo ntawm npib tsib xee muaj qhov taw tes melting siab heev thiab yuav tsis yaj thaum lub sij hawm vuam, uas yuav ncaj qha ua rau inclusions nyob rau hauv lub weld. Cov impurities xws li roj, machining lubricants, thiab cim crayons yuav ua rau muaj teeb meem xws li sulfur thiab lead, ua rau thermal tawg. Txoj hauv kev kom raug yog polishing vuam nto nyob rau hauv ib qho kev taw qhia nrog cov ntawv xuab zeb zoo ntawm 600 grit lossis ntau dua kom tshem tawm cov oxide txheej, tom qab ntawd so kom huv si nrog cawv paj rwb, thiab txuas tam sim ntawd tom qab so kom tsis txhob rov tsim dua cov oxide txheej; Yog hais tias nws yog ib tug tuab phaj los yog ib tug heev constrained qauv, preheating rau 100-200℃yog txaus. Cov ntaub ntawv npib tsib xee tsis tas yuav tsum tau preheated rau hauv chav tsev kub tshwj tsis yog tias qhov kub thiab txias yog qhov tsawg dhau kom tsis txhob muaj dej condensation ua rau lub qhov hws.
Tom ntej no yog kev xaiv cov txheej txheem vuam. Feem ntau siv xws li TIG vuam, MIG vuam, thiab arc vuam. Xaiv txoj hauv kev zoo hauv cov xwm txheej sib txawv tuaj yeem txhim kho kev ua tau zoo thiab zoo. TIG welding (tungsten arc vuam) yog txoj kev siv ntau tshaj plaws ntawm nickel vuam. Nws yog tshwj xeeb tshaj yog haum rau nyias qhov chaw thiab kaw vuam. Lub weld hlaws muaj qhov zoo nkauj zoo nkauj thiab ob peb impurities. Qhov tsis zoo yog tias qhov ua tau zoo yog qis dua me ntsis. Thaum welding, ntshiab argon nrog ib tug purity ntawm ntau dua los yog sib npaug rau 99.99% yuav tsum tau siv rau kev tiv thaiv. Tus nqi ntws yuav tsum tau tswj ntawm 10-15 L / min, thiab qhov ntev ntawm lub arc yuav tsum khaws cia ntawm 2-3 mm. Ntev dhau lawm yuav ua rau kev tiv thaiv tsis zoo thiab qhov pores. Thaum ib leeg-sab vuam thiab ob sab sib sau, sab nraub qaum yuav tsum tau ntim nrog argon rau kev tiv thaiv. MIG vuam yog tsim rau batch vuam ntawm tuab qhov chaw. Cov hlau pub yog du, thiab lub arc yog ruaj khov. Ntshiab argon lossis argon-helium sib xyaw roj yog siv los ua cov roj tiv thaiv. Lub interlayer kub yog nruj me ntsis tswj hauv qab 150℃los tiv thaiv coarse nplej thiab txo qhov toughness ntawm weld.
Cov ntsiab lus tseem ceeb hauv cov txheej txheem vuam yog los tswj cov khoom siv hluav taws xob thiab vuam tsim. Nickel tsis zoo thermal conductivity, thiab cua sov yog yooj yim concentrated. Thaum lub tshav kub input loj dhau lawm, nws yuav ua rau cov electrode overheat thiab cov weld mus hlawv. Nws tseem yuav ua rau cov nplej ua ntxhib, ua rau muaj kev pheej hmoo ntawm thermal tawg. Yog hais tias lub tshav kub input me me dhau lawm, yuav muaj fusion tsis tiav thiab tsis tiav vuam. Hauv kev ua haujlwm tiag tiag, nws raug nquahu kom siv cov kab me me zog vuam. Tsis txhob nce qhov tam sim no arbitrarily. Kho nws raws li txoj kab uas hla ntawm vuam hlau, xws li 3.2 hli vuam hlau. Lub tiaj welding tam sim no yog tswj ntawm 85-135 A. Lub vuam ntsug thiab cov hlaws hlaws yuav tsum raug txo kom tsim nyog. Lub vuam ceev yuav tsum tsis sib xws thiab tsis procrastinating. Tsis tas li ntawd, qhov fluidity ntawm lub pas dej nickel molten yog qhov tsis zoo, yog li cov phom vuam yuav tsum tau ua kom zoo, tab sis lub viav vias amplitude tsis tuaj yeem tshaj 3 npaug ntawm txoj kab uas hla ntawm vuam hlau. Nres luv luv ntawm ob sab los tiv thaiv kev txiav. Lub weld yuav tsum tau ua rau hauv cov duab convex ntau npaum li qhov ua tau kom tsis txhob tiaj tus vuam lossis cov duab concave kom txo tau cov khoom tawg.
Thaum kawg, cia peb tham txog cov kev daws teeb meem rau cov teeb meem tshwm sim. Feem ntau cov pores feem ntau tshwm sim los ntawm kev tiv thaiv tsis zoo, dampness ntawm cov khoom siv vuam, lossis qhov chaw tsis huv. Txoj kev daws teeb meem yog txhawm rau ntxiv dag zog rau kev tiv thaiv argon, ziab cov khoom siv vuam ua ntej vuam (qhuav ntawm 200-250℃rau 30-60 feeb), thiab ntxuav lub hauv paus hlau kom huv si. Kub tawg feem ntau yog tshwm sim los ntawm impurities coj los rau hauv thiab tsis raug cua sov input. Ntxiv nrog rau kev tu kom zoo, nickel-raws li vuam hlau uas muaj cov khoom deoxidizing xws li titanium thiab manganese yuav tsum tau siv los cuam tshuam cov teebmeem ntawm impurities. Thaum lub vuam raug kaw, lub arc crater yuav tsum tau ntim, thiab yog tias tsim nyog, lub arc crater yuav tsum tau polished kom tshem tawm cov crater kom tsis txhob muaj kev loj hlob ntawm cov kab nrib pleb.
Ntau tus neeg xav tias nickel vuam yog qhov nyuaj. Qhov tseeb, nws tsis yog tias cov cuab yeej siv tau yooj yim, tab sis cov ntsiab lus tsis nyob hauv qhov chaw. Nickel vuam: xya lub ntsiab lus ntawm kev npaj, peb lub ntsiab lus ntawm kev ua haujlwm. Yog tias koj tsis tub nkeeg hauv kev tu ua ntej welding, xaiv cov txheej txheem tsim nyog, tswj cov cua sov kom zoo, thiab sib sau ua ke los ntawm ntau qhov kev ua haujlwm, koj tuaj yeem vuam cov nickel welds tsim nyog.
Kev siv vuam tshuab hauv peb cov khoom
Nickel welded crucible
Titanium welded crucible
Tungsten welded crucible
Molybdenum welded crucible
Tantalum welded qhov chaw
Niobium welded crucible
