Taw qhia rau Monel400 cov ntaub ntawv thiab cov txheej txheem vuam
Monel400 cov ntaub ntawv qhia
Monel 400 alloy yog tsim los ntawm Ni thiab Cu. Thaum siv nyob rau hauv complex ib puag ncig, ib tug passivation zaj duab xis yuav tsim nyob rau hauv lub alloy nto, yog li nws muaj zoo heev corrosion kuj. Monel 400 alloy muaj lub zog siab thiab kev ua haujlwm zoo. Nws feem ntau yog siv los tsim cov kav dej, kiv cua, impellers, worms, twj tso kua mis, thiab lwm yam.
Nrog rau kev loj hlob sai ntawm petrochemical kev lag luam thiab tshuaj fiber ntau tshuab, kev ntxiv dag zog ntawm cov txheej txheem tshuaj (kub, siab, nruab nrab concentration), muaj ntau thiab ntau zaus uas qhov nruab nrab corrosive heev. Cov yam tseem ceeb no tau txhawb kom maj mam sib kis ntawm cov ntaub ntawv tshwj xeeb nrog kev tiv thaiv corrosion siab. Siv, ntawm cov nickel-raws li corrosion-resistant alloys yog feem ntau siv. Monel 400 yog ib-theem austenitic alloy ntawm Ni-Cu khoom tov. Nws muaj corrosion kuj zoo heev thiab nruab nrab-kub lub zog, tshwj xeeb tshaj yog nyob rau hauv muaj zog acids thiab alkalis ntawm nruab nrab thiab siab kub. Kev siv Monel 400 hauv kev tsim cov hlab ntsha siab yuav ua rau muaj kev pabcuam lub neej ntawm cov khoom siv, txo tus naj npawb ntawm kev kaw tsis tau npaj tseg, txuas ntxiv cov khoom siv tu lub voj voog, txo cov nqi tu thiab kaw kev poob, txo qhov tshwm sim ntawm kev sib tsoo, thiab yog qhov tsim nyog rau kev nyab xeeb, kev ruaj ntseg, kev ua neej ntev thiab kev txaus siab ntawm lub cuab yeej. , kev ua haujlwm zoo. Yog li ntawd, cov hlau no tau siv dav hauv kev tsim cov cuab yeej tshwj xeeb hauv kuv lub teb chaws petrochemical thiab nuclear kev lag luam hauv xyoo tas los no.
Monel400 kev npaj ua ntej vuam
(1) Shielding gas xaiv: Lub luag haujlwm ntawm cov roj thaiv kev tiv thaiv yog los tiv thaiv oxidation ntawm weld hlaws thiab xyuas kom muaj kev tsim ntawm cov hlaws weld. Thaum siv GTAW vuam, cov roj tiv thaiv yog Ar nrog purity ntawm 99.99%. Ua ntej vuam, Ar yog siv los ua vuam rov qab tiv thaiv hauv cov yeeb nkab kom txog thaum lub thickness ntawm cov hlau vuam mus txog 6.4 hli los xyuas kom meej tias cov hlau vuam tsis oxidized rau qhov loj tshaj plaws. Kev tiv thaiv Ar nyob rau sab nraub qaum yuav tsum tau muab khi rau ntawm ob qho kawg, thiab vuam tsuas yog tuaj yeem ua tau thaum cov pa oxygen ntawm cov pa hauv nruab nrog ntsuas kom qis dua 0.5%.
(2) Kev ua haujlwm tu: Muaj cov yeeb yaj kiab refractory oxide nyob rau saum npoo ntawm Monel 400 alloy. Thaum lub sij hawm welding, inclusions yog yooj yim generated nyob rau hauv lub weld seam, ua rau vuam tsis xws luag. Ua ntej vuam, yam tsawg kawg 25 hli sab hauv thiab sab nraud vuam ntawm ob sab yuav tsum tau ntxuav nrog ib tug stainless hlau txhuam tsis siv cov pa roj carbon steel los tiv thaiv cov xim, roj, xeb, av thiab oxides los ntawm kev ua phem rau lub vuam. Thaum lub sij hawm vuam txheej txheem, txhua txheej thiab txhua qhov hla yuav tsum tau polished nrog stainless hlau sib tsoo lub log uas tsis tau siv ntawm cov hlau kom tsis txhob muaj slag suav nrog; Nyob rau tib lub sijhawm, cov hlaws vuam yuav tsum tau so nrog ethanol kiag li tom qab vuam. Lub protrusion ntawm lub hauv paus hlaws yuav tsum tsis pub tshaj 2 hli, thiab lub hauv paus hlaws yuav tsum tsim ib tug du nkhaus. Tsuas yog qhov zawj ntawm qhov chaw thiab thaj chaw nyob ze yuav tsum tau ntxuav cov kuab tshuaj, thiab cov hlaws interlayer tuaj yeem ua hauv av nrog cov khoom siv alumina lossis silicon carbide sib tsoo lub log.
Monel400 vuam txheej txheem
(1) Phau ntawv tungsten arc vuam yog dav siv rau vuam Monel alloy, thiab tshwj xeeb tshaj yog haum rau vuam nyias qhov chaw, me me hla ntu, thiab cov khoom siv uas tsis pub cov seem slag tom qab vuam. Monel alloy tuaj yeem nqus tau cov roj ntau hauv lub xeev molten, yog li nws yooj yim los tsim cov pores ntom ntom thaum vuam. Yog li ntawd, nyob rau hauv cov xwm txheej ntawm corrosion kuj, phau ntawv tungsten arc vuam feem ntau yog siv los ua cov hauv paus nkag mus vuam.
(2) Electrode arc vuam kuj yog ib qho kev siv vuam ntau hauv Monel 400 vuam. Thaum lub workpiece yog thicker, yog hais tias tsuas yog siv argon arc vuam, lub tshav kub input yuav nce thiab kev ua tau zoo ntawm cov khoom siv hauv paus yuav raug cuam tshuam. Qhov cuam tshuam yuav ua rau kom muaj kev sib tsoo ntawm qhov vuam; Nyob rau hauv tas li ntawd, lub ntau lawm efficiency yog tsawg thiab lub welder lub zog siv yog siab. Yog li ntawd, nyob rau hauv welding thicker cov ntaub ntawv, arc vuam yog qhov zoo tshaj plaws filling txoj kev. Txawm li cas los xij, qhov tsis zoo ntawm electrode arc vuam nyob rau hauv Monel 400 vuam yog qhov tsis zoo ntawm cov vuam seam, thiab cov kev hloov ntawm vuam tsis yuav tsum nruj me ntsis tswj thaum lub vuam txheej txheem. Tshwj xeeb, cov kab nrib pleb yog nquag tshwm sim ntawm arc crater.
