Dab tsi yog qhov txawv ntawm Monel alloy thiab stainless hlau?
Monel 400 alloy (UNS N04400 lossis MCu-28-1.5-1.8 lossis Ni68Cu28Fe) yog cov khoom siv nickel-based alloy. Nws muaj kev tiv thaiv corrosion zoo heev hauv dej hiav txwv, tshuaj kuab tshuaj, ammonia sulfur chloride, hydrogen chloride, thiab acidic media xws li sulfuric acid, hydrofluoric acid, hydrochloric acid, phosphoric acid, thiab organic acids, nrog rau alkaline media, ntsev, thiab molten ntsev. . Tsis tas li ntawd, nws muaj cov khoom siv zoo heev, tuaj yeem siv dav hauv ntau yam los ntawm qhov kub thiab txias mus rau qhov kub thiab txias, thiab muaj kev ua haujlwm vuam zoo thiab nruab nrab mus rau siab zog.
Monel400 alloy yog ib qho kev daws teeb meem muaj zog alloy. Nws qib alloy yog UNS N04400, muaj npe raws li "ASTM-SAE Unified Number System". Piv nrog rau hom austenitic stainless hlau 1Cr18Ni9Ti, Monel400 alloy muaj qhov sib txawv ntawm lub cev thiab cov khoom siv kho tshuab. Cov hlau muaj hluav taws xob zoo heev thiab thermal conductivity, nws qhov kev tiv thaiv yog li 70% ntawm 1Cr18Ni9Ti, thiab nws cov thermal conductivity yog 36% siab dua 1Cr18Ni9Ti.
Monel400 muaj vuam zoo thiab siv tau nrog arc vuam (SMAW), argon arc vuam (GTAW), inert gas shielded vuam (GMAW) thiab lwm yam vuam txoj kev. Zoo ib yam li austenitic stainless hlau, tsis tas yuav tsum muaj kev kho mob ua ntej ua ntej vuam, thiab tsis muaj kev kho cua sov tom qab vuam. Nws daim ntawv welded sib koom ua ke zoo ib yam li austenitic stainless hlau, tab sis nws kuj muaj nws tus kheej nta.
Vim tias lub hauv paus hlau muaj cov thermal conductivity ntau dua thiab zoo dua cov cua kub dissipation kev ua tau zoo, lub pas dej molten generated thaum lub sij hawm vuam yog me dua, thiab lub zog nkag thiab nkag mus rau qhov tob ntawm vuam arc kuj qis dua cov austenitic stainless hlau, yog li yuav tsum tau them nyiaj tshwj xeeb. rau ob yam nram qab no. point:
① Thaum lub sij hawm vuam txheej txheem, lub tshav kub tawm tswv yim yuav tsum tau nce nyob rau hauv nruab nrab, thiab tuab heev blunt npoo yuav tsum tsis txhob siv. ② Lub kaum sab xis ntawm qhov vuam zawj yuav tsum tau nce kom tsim nyog kom tsis txhob muaj kev sib txuam tsis zoo thiab tsis txhob muaj fusion.
① Cov khoom siv hluav taws xob yuav tsum tau nce kom tsim nyog thaum vuam kom tsis txhob muaj qhov tuab tuab ntawm cov ntug passivated; ② Lub vuam zawj lub kaum sab xis yuav tsum tau nce kom tsim nyog los xyuas kom meej fusion zoo thiab tsis txhob fusion.
Lub cev muaj zog: ntom 8.80g / cm³
Monel400 alloy muaj cov ntsiab lus Ni siab. Txhawm rau kom ntseeg tau tias vuam zoo, vuam cov ntaub ntawv uas phim cov tshuaj muaj pes tsawg leeg ntawm lub hauv paus hlau yuav tsum tau siv rau kev tso tawm. Nquag, peb yuav siv ERNiCu-7 raws li cov vuam hlau, lossis ENiCu-7 ua tus pas vuam.
ua
Cov hlau no tuaj yeem ua machined siv cov txheej txheem machining rau cov khoom siv hlau. Dej coolant yuav tsum tau thaum lub sij hawm high-speed machining. Cov khoom no yuav shrinkage thaum lub sij hawm ua, yog li yuav tsum tau them nyiaj mloog mus rau kev ua shrinkage nyiaj kom paub meej qhov tseeb. Monel400 yog qhov rhiab heev rau cov kab nrib pleb thermal thiab nws yooj yim rau cov kab nrib pleb hauv arc craters. Tshwj xeeb tshaj yog tom qab muaj teeb meem impurities S thiab P yog infiltrated, low-melting-point eutectic cov ntaub ntawv (xws li Ni-S eutectic, Ni-P eutectic) yog ib qho yooj yim rau aggregate ntawm lub grain ciam teb. Cov khoom siv eutectic uas tsis muaj melting point no muaj lub zog tsawg thiab siab brittleness. , yooj yim ua rau thermal tawg. Qhov tseem ceeb tshaj plaws metallurgical qhov tseem ceeb hauv kev txo cov weld solidification cracks yog tswj hwm cov ntsiab lus ntawm S thiab P.
vuam
Monel 400 muaj kev vuam zoo heev thiab tuaj yeem siv welded siv TIG thiab MIG txoj kev. Thaum vuam, koj tuaj yeem siv Monel 400 lub cev lossis EniCu-7 hlau thiab electrode, thiab koj tuaj yeem siv phau ntawv arc vuam thiab submerged arc vuam. Monel 400 tuaj yeem txuas nrog cov pa roj carbon thiab cov hlau tsis tshua muaj hlau. Ua ntej welding, roj, lubricants, xim thiab lwm yam khoom yuav tsum tau ntxuav tsis pub dhau 50 hli ntawm qhov zawj thiab ob sab. Rau cov xim thiab lwm cov khib nyiab uas tsis muaj kuab lom hauv cov tshuaj degreasing, cov tshuaj ntxuav xws li methyl chloride tuaj yeem siv los ntxuav lawv. Daim npav npav tuaj yeem raug tshem tawm siv methanol. Yog tias muaj cov khib nyiab nias rau hauv qhov chaw ntawm lub vuam, nws tuaj yeem raug tshem tawm los ntawm kev sib tsoo nrog lub log sib tsoo, thiab tom qab ntawd yaug nrog dej. Cov khoom yuav tsum qhuav thiab cov hlau yuav tsum huv si ua ntej welding. Qhov no tiv thaiv cov impurities tsis zoo xws li ya raws, roj, sulfur thiab phosphorus los ntawm kev nkag mus rau hauv pas dej ua ke.
