Bright Annealed Tube Thaum tshav kub kub kho txheej txheem
Apr 27, 2022| Ci ntsa iab annealed hlab, feem ntau hu ua ci annealing, feem ntau yog siv rau cua sov thiab annealing nyob rau hauv ib tug confined qhov chaw, cia qhov kub thiab txias yuav maj mam poob mus rau tsawg kawg yog 500 degrees nyob rau hauv lub confined qhov chaw, thiab ces txias lawm ib txwm ua brightness tsis ua decarburization. Oxidation thiab decarburization tshwm sim thaum lub sij hawm cua sov thiab txias thaum lub sij hawm annealing zoo tib yam, yog li cov cua sov kho steel undergoes ntxiv ua, uas ua rau kom poob thiab nqi ntawm cov hlau, yog li kaj annealed raj feem ntau siv.
Tooj liab thiab tooj liab alloys tau yooj yim oxidized thaum kho cua sov. Txhawm rau tiv thaiv oxidation thiab txhim kho qhov zoo ntawm qhov chaw ua haujlwm, nws yuav tsum tau muab tso rau hauv qhov chaw tiv thaiv lossis lub tshuab nqus tsev, uas yog lub npe hu ua ci ntsa iab annealing raj. Feem ntau siv cov cua sov tiv thaiv thaum tshav kub kub ntawm tooj liab thiab tooj liab alloys suav nrog dej vapor, decomposed ammonia, hlawv tsis tiav thiab dehydrated ammonia, nitrogen, qhuav hydrogen thiab ib nrab hlawv roj (los yog lwm yam combustible gases). Nws tuaj yeem raug xaiv raws li hom, muaj pes tsawg leeg thiab kev xav tau ntawm cov alloy.
Ntshiab tooj liab thiab cupronickel yuav tsis oxidized nyob rau hauv ib tug tsis muaj zog txo cua, thiab nws yog tsim nyog los tiv thaiv los ntawm combustion ammonia muaj 2 feem pua H2 los yog roj muaj 2 feem pua rau 5 feem pua H2 thiab CO tsis tiav combustion. Cov tooj liab ntshiab kuj tuaj yeem tiv thaiv los ntawm dej vapor. Txhawm rau tiv thaiv cov kab mob hydrogen, thaum cov pa oxygen uas muaj tooj liab yog annealed, cov ntsiab lus hydrogen hauv qhov chaw tiv thaiv yuav tsum tsis pub tshaj 3 feem pua, lossis raws li tau piav qhia dhau los, kev kho cua sov hauv qhov chaw oxidizing me ntsis. Ntshiab tooj liab kuj yog siv dav siv lub tshuab nqus tsev annealing. Bronze uas muaj txhuas, chromium, beryllium, thiab silicon tuaj yeem ua tiav lub hom phiaj ntawm kev ci ntsa iab ntawm cov hlab ntsha tsuas yog nyob rau hauv ib qho chaw uas txo qis heev. Kev kho cua sov (annealing lossis quenching) ntawm beryllium bronze feem ntau yog kev tiv thaiv los ntawm decomposing ammonia, tab sis qhov undecomposed ib feem ntawm ammonia yuav tsum tsis txhob ntau tshaj 20 feem pua, txwv tsis pub nws yog ib qho yooj yim ua rau muaj teeb meem npuas.
tooj dag nrog cov ntsiab lus tsis tshua muaj zinc tuaj yeem ua rau cov kav dej uas ci ntsa iab, tab sis cov kav dej ci ntsa iab ntawm tooj dag nrog cov ntsiab lus ntawm ntau dua 15 feem pua tshaj tawm tseem tsis tau daws. Qhov no yog vim qhov decomposition siab ntawm zinc oxide yog tsawg, thiab ZnO tuaj yeem tsim nyob rau hauv ib qho chaw uas muaj cov pa oxidizing me ntsis, thiab zinc pib volatilize thaum rhuab mus rau 450 degree lossis siab dua, dezincification ntawm tooj dag. Txhawm rau kov yeej qhov tsis zoo no, kev sib tsoo tuaj yeem ua tau nyob rau hauv cov xwm txheej siab dua. Kev tiv thaiv huab cua siv rau tooj dag suav nrog kev sib xyaw tsis tiav ntawm cov pa roj, decomposed ammonia, dej vapor, thiab lwm yam. Qhov chaw tiv thaiv yuav tsum tsis muaj leej faj, lub workpiece yuav tsum tau ua tib zoo ntxuav ua ntej kev kho cua sov, thiab yuav tsum tsis txhob muaj roj los yog lwm yam av ntawm lub nto.