Cov yam ntxwv, kev siv, qib thiab qhov zoo ntawm Monel400 thiab K-500 alloys
Monel yog dab tsi? Cov yam ntxwv, kev siv, qib, qhov zoo ntawm Monel alloy
Monel yog lub npe lag luam rau ib pawg ntawm cov nickel alloys feem ntau ntawm cov npib tsib xee thiab tooj liab, nrog cov lej ntawm hlau, manganese, carbon thiab silicon. Monel muaj zog dua li npib tsib xee ntshiab thiab paub txog nws qhov kev tiv thaiv corrosion rau ntau qhov chaw corrosive. Cov khoom yog thawj zaug tsim nyob rau hauv 1901 los ntawm Robert Crooks Stanley. Lub npe "Monel" yog lub cim lag luam ntawm "Specialty Metals Corporation". Paub tias yog superalloy, Monel muaj lub ntsej muag-centered cubic lattice qauv hauv nws cov microstructure. Monel 400 tau pom zoo ua cov khoom siv los ntawm ASME Boiler thiab Pressure Vessel Code.
Monel alloy khoom
Monel alloy yog ib-theem cov khoom siv binary alloy nrog cov khoom zoo heev ntawm qhov kub thiab txias. Monel alloy 400 muaj qhov tshwj xeeb lub ntiajteb txawj nqus ntawm 8.80, melting kub ntawm 1300-1350 degree, thiab Poisson tus piv ntawm 0.32. Cov lus hauv qab no muab cov khoom siv kho tshuab ntawm Monel 400 khoom ntawm chav tsev kub.
Machinability: Machinability yog qhov nyuaj heev vim kev ua haujlwm nyuaj ntawm Monel. Cov txheej txheem siv hlau tuaj yeem siv los ua cov ntaub ntawv Monel.
Vuam: Gas shielded vuam, roj shielded hlau arc vuam, hlau arc vuam thiab submerged arc vuam yog cov nyiam vuam txoj kev rau Monel alloys.
Forging: Monel tuaj yeem forged, tab sis tsuas yog nyob rau hauv cov txheej txheem tswj.
Kev Ua Haujlwm Kub Kub: Qhov kub ua haujlwm kub ua haujlwm rau Monel yog 648-1176 degree (1200-2150 degree F). Ua ntej pib ua cov txheej txheem thermal, qhov ntsuas kub tsim nyog yuav tsum tau txiav txim siab.
Monel qib
Muaj tsib hom Monel alloys ua lag luam raws li ISO 6208 (phaj, ntawv thiab sawb), ISO 9725 (forgings), ISO 9723 (rods), ISO 9724 (xaim) thiab DIN 17751 (tubes thiab tubes). Cov qib Monel no yog:
Monel 400 los yog Alloy 400
lus 401
lus 404
lus 405
Monel K-500
Monel 400: Monel 400 ua raws li cov qauv hauv qab no: BS 3075, 3076 NA 13, DTD 204B thiab ASTM B164. Kuj hu ua Alloy 400, nws muaj lub zog siab, zoo heev corrosion kuj, zoo ductility thiab thermal conductivity. Cov ntawv thov rau Monel 400 suav nrog cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, kev tsim hluav taws xob hauv hiav txwv, tshuaj thiab hydrocarbon ua.
Monel 401: Monel 401 yog siv dav hauv kev siv hluav taws xob thiab hluav taws xob. Lub alloy muaj zoo weldability thiab zoo brazing zog ntawm cov roj tungsten arc txheej txheem. Kev tiv thaiv vuam yog ib txoj kev txaus siab heev ntawm kev koom nrog cov ntaub ntawv. Monel 401 yog them los ntawm tus qauv UNS N04401.
Monel 404: Cov muaj pes tsawg leeg ntawm Monel 404 tau ua tib zoo tsim kom muaj qhov kub thiab txias Curie, tsis muaj permeability thiab cov yam ntxwv zoo brazing. Monel 404 tuaj yeem siv nrog cov txheej txheem vuam thiab forging, tab sis tsis tuaj yeem ua haujlwm kub. Yuav kom tau txais kev ua tiav zoo dua, kev ua haujlwm txias tuaj yeem ua tau. Monel 404 yog dav siv nyob rau hauv transistor ntim thiab ceramic-rau-hlau seals, ua raws li UNS N04404 thiab ASTM F96 cov qauv
Monel 405: Feem ntau yog siv rau kev ntim cov tshuab tsis siv neeg ntsia hlau, Monel 405 yog tsim los ntawm UNS N04405 thiab them los ntawm ASME SB-164, ASTM B-164, Tsoom Fwv Teb Chaws QQ-N{{ 6}}, SAE AMS 4674 & 7234, Tub rog MIL-N- 894, BS3072NA18, BS3073NA18, QQ-N-286, DIN 17750, ISO 6208, BS3075NA18, BS30, BS3075NA18, BS30 , DIN 17752, DIN 17753, DIN 17754, QQ-N-286, SAE AMS 4676, A Code Case ISO 9723, ISO 9724, ISO 9725, BS3074NA18, DIN 17751 thiab NACE}. Nws yog ib qho dawb machining qib ntawm alloy 400. Cov ntsiab lus sulfur yog nce mus rau 0.025-0.060%, uas ua rau nickel-tooj liab sulfide, uas txhim kho machinability.
Monel K-500: Qhov sib ntxiv ntawm txhuas thiab titanium rau lub hauv paus npib tsib xee-tooj liab muab Monel K500 ntau zog thiab hardness nrog rau zoo heev corrosion kuj. Txawm li cas los xij, Alloy K-500 muaj kev xav ntau dua rau kev ntxhov siab corrosion cracking nyob rau hauv tej qhov chaw nyob rau hauv lub hnub nyoog-hardened tej yam kev mob. Monel K500 yog tshwj xeeb tshaj yog haum rau centrifugal twj tso kua mis shafts nyob rau hauv marine kev pab cuam. Cov ntawv thov rau K-500 alloy yog cov cuab yeej, cov cuab yeej siv roj zoo, cov khoom siv hluav taws xob, cov tshuab raj dej hiav txwv, cov twj tso kua mis, cov kiv cua tig, cov tshuab scrapers, scrapers thiab roj zoo laum dab tshos.
Qhov zoo ntawm Monel
Cov txiaj ntsig tseem ceeb muab los ntawm Monel yog
High corrosion kuj rau acids thiab alkalis.
Alkali tiv taus.
Zoo ductility (yooj yim zoo thiab zoo)
Yooj yim rau weld, solder thiab solder
High mechanical zog
Muaj nyob rau hauv cov ntaub ntawv sib txawv xws li cov ntawv txheeb, daim hlau, cov pas nrig, cov pas nrig, cov raj thiab cov raj
Txaus nyiam tsos thiab tiav.
Muaj peev xwm tiv taus qhov kub thiab txias
Monel's Disadvantages
Txawm hais tias Monel muaj ntau qhov zoo, nws tsis yog hlau zoo meej. Nws muaj qhov tsis zoo hauv qab no:
Kev ua haujlwm tsis zoo
Raug rau pitting corrosion nyob rau hauv cov dej ntsev ib puag ncig.
Galvanic corrosion qee zaum tshwm sim nyob rau hauv lub xub ntiag ntawm Monel
Monel siv rau dab tsi?
Txij li nws yog tsim los ntawm kub thiab txias ua hauj lwm, machining thiab vuam, Monel alloy yog dav siv nyob rau hauv marine thiab tshuaj ua teb. Txawm li cas los xij, cov khoom siv no kim heev thiab yog li yuav tsum tsuas yog siv yog tias tsis muaj lwm txoj hauv kev pheej yig dua. Feem ntau, Monel cov kav dej yog ntau dua 3 npaug ntau dua li cov pa roj carbon steel kav. Cov ntawv thov rau Monel yog li qub thiab cov twj tso kua mis; twj tso kua mis thiab tsav shafts; cov khoom siv hluav taws xob thiab hluav taws xob; cov roj tseem ceeb, boiler pub dej rhaub, marine fixtures thiab fasteners; roj av thiab roj tank; roj av nruas; springs; chemical ua khoom siv; Txheej txheem nkoj thiab kav dej; kub exchangers; hlau suab paj nruag; degassing cua sov; suab paj nruag; tub yees; ua zaj duab xis; chav ua noj dab dej; lub ru tsev; thiab cov iav tsom iav. Monel alloy muaj nyob rau hauv cov kav dej, yeeb nkab fittings, daim hlau, strips, round rods, thiab strips.
