Yog vim li cas Monel 400 thiaj li Damn kim
Monel alloy yog thawj zaug tsim los ntawm Robert Crookes Stanley ntawm International Nickel Company thiab patented nyob rau hauv 1906. Lub invention tshiab muaj npe tom qab lub tuam txhab tus thawj tswj hwm. Sij hawm dhau mus, ntau yam alloys hauv Monel tsev neeg tau tsim rau kev siv sib txawv.
Monel alloy muaj pes tsawg leeg
Monel yog lub npe muab rau ib pawg ntawm cov alloys (401, R405, K-500, 400, 404, thiab 402) uas muaj nickel thiab tooj liab thiab qee zaum hlau, silicon, manganese, thiab titanium. Txawm hais tias tag nrho cov alloys no feem ntau paub txog lawv qhov zoo corrosion kuj, txhua lub alloy muaj qee qhov tshwj xeeb thiab siv.
Piv txwv li, Monel 404 muaj cov ntsiab lus npib tsib xee tsawg (52%), cov ntsiab lus txhuas siab (0.05%), thiab cov ntsiab lus tooj liab (47%). Monel R405 zoo sib xws hauv cov ntsiab lus rau Monel 400, tab sis tsis muaj titanium.
Monel K500 muaj txhuas (0.3%) thiab titanium (0.35% txog 0.85%). Cov hlau no muaj qis coefficient ntawm kev sib txhuam thiab hnav tsis kam ntau dua li lwm cov Monel alloys. Nws kuj muaj cov cuab yeej zoo heev, xws li lub zog thiab hardness ntawm qhov kub txog li 600 degree (1,112 degree F).
Monel 400 muaj tooj liab thiab npib tsib xee nyob rau hauv tib lub proportions raws li ib txwm tshwm sim nyob rau hauv nickel ore los ntawm Sudbury mine hauv Ontario, Canada. Vim tias cov hlau no kim dua li cov hlau tsis muaj steel, nws tsuas yog siv rau hauv cov ntawv thov tseem ceeb uas cov khoom pheej yig dua tsis tuaj yeem hloov pauv.
Monel 400 muaj 28 mus rau 34 feem pua tooj liab thiab tsawg kawg yog 63 feem pua nickel. Nws kuj feem ntau muaj hlau, manganese, silicon, carbon, thiab kab ntawm leej faj thiab titanium.
Cov yam ntxwv ntawm Monel Alloy 400
Monel muaj zog dua npib tsib xee lossis tooj liab ib leeg. Monel 400 muaj npib tsib xee thiab tooj liab nrog rau carbon, hlau, manganese, silicon thiab titanium. Qhov kev muaj pes tsawg leeg no pab Monel tswj nws txoj kev tiv thaiv corrosion zoo heev nrog rau kev ua kom muaj zog thiab lub zog ntawm lub zog ntawm qhov kub thiab txias, feem ntau mus txog 400 degree (752 degree F). Cov yam ntxwv no yog qhov yuav tsum tau ua tseem ceeb hauv kev siv aerospace qhov chaw ua haujlwm kub sib txawv. Monel 400 yog siv los ua rivets rau txhuas-hulled aircraft.
Ntawm qhov kub thiab txias, Monel 400 khaws cov cuab yeej cuab tam xws li hardness thiab lub zog, tab sis nws cov ductility yog txo me ntsis. (Yog xav paub ntxiv txog cov khoom siv zog, nyeem qhov tensile zog hauv kev kawm tob.)
Monel 400 muaj qhov zoo tshaj plaws corrosion kuj nyob rau hauv high kub chav thiab siab tshaj tawm ntws kub brine. Nws tiv thaiv kev ntxhov siab corrosion cracking (SCC) hauv dej tshiab, thiab nws cov kav ntev hauv dej hiav txwv turbulent justifies nws tus nqi. Nws tiv thaiv hydrofluoric acid thiab hydrochloric acid yuav tsum tau degassing. Nws feem ntau tiv taus cov khoom noj acidic; Txawm li cas los xij, nws tsis tiv taus nitric acid, uas muaj oxidizing teebmeem.
Monel 400 tsis yooj yim rau tshuab vim nws ua haujlwm nyuaj thaum lub tshuab ua haujlwm. Yog li ntawd, nws yog qhov zoo tshaj plaws los txiav thiab tig cov alloys ntawm qeeb qeeb thiab pub tus nqi qis heev. Qhov no inevitably ua rau cov nqi ua ntau dua.
Monel 400 muaj cov conductivity ntawm 34% IACS (International Annealed Copper Standard). Txawm tias thaum khov rau cov kua hydrogen kub, nws khaws qee qhov ductility. Nws kuj yog weakly magnetic.
Monel 400 muaj vuam zoo thiab tuaj yeem welded los ntawm submerged arc vuam, roj hlau arc vuam thiab roj tungsten arc vuam. Monel 60 muab tub lim hlau siv rau vuam tuaj yeem ua kom ntseeg tau tias cov welded sib koom ua ke muaj tib lub hardness, txhua yam muaj zog thiab tiv thaiv corrosion raws li lub hauv paus hlau. (Kev nyeem ntawv: Ua rau thiab tiv thaiv corrosion ntawm welded pob qij txha.)
Ntxiv nrog rau kev sib txuas welded, Monel 400 kuj tseem tuaj yeem txuas los ntawm kev sib txuas los yog brazing.
Kev txwv ntawm Monel 400
Monel 400 tsis tiv taus hypochlorite, sulfur dioxide, nitric acid lossis nitric oxide. Nws kuj tseem ua rau galvanic corrosion.
