1. Dab tsi yog cov yam ntxwv me me me ntawm hastelloy b (tsis yog n10001) uas ua rau nws haum rau daim hlau ntaub ua kom muaj zog?
Hastelloy b yog npib tsib xee - molybdenum alloy uas tsis muaj kev zam corrosition los ntawm nws cov hlau me me muaj pes tsawg leeg thiab cov qauv. Qhov feem ntau tsim ntawm npib tsib xee (kwv yees} 2}}%) thiab molybdenum (26 {{4 400}
Lub npib tsib xee - molybdenum synerany, Toubness, thiab Kuj muaj cov caustic ib puag ncig thiab cov chloride kev ntxhov siab corrosion. Molybdenum yog thawj lub ntsiab kev sib tham tiv thaiv kom txo cov kua qaub. Hauv Hastelloy b, lub siab molybdenum cov ntsiab lus tsim lub zog, ruaj khov ua yeeb yaj kiab uas tiv thaiv cov tshuaj lom neeg uas tsis sib haum xeeb, tshwj xeeb hauv qhov tsis {}} oxidizing tej yam kev mob.
Microstructure thiab kev ua haujlwm: Hastelloy B yog cov khoom -}}} Cov tshuaj kho kom tau zoo alloy. Qhov no txhais tau nws lub zog yog muab tau los ntawm cov atomic- theem distortion los ntawm ob lub molybdenum thiab lwm yam nyob rau hauv lub tsibkel {}} kev kho mob. Cov qauv no muab cov hlua khau kom zoo nkauj ua kom zoo nkauj thiab muaj kev sib xyaw ua ke, thiab cov khoom siv hluav taws xob ua ke, thiab cov khoom sib hloov cua sov.
Qhov tseem ceeb txwv {0- ece ecidation tsis kam: tus yam ntxwv tseem ceeb kom nco ntsoov tias yog cov ntsiab lus chromium tsawg (<1%) makes Hastelloy B unsuitable for environments with oxidizing agents (e.g., nitric acid, ferric or cupric salts, or aerated solutions at high temperatures). In such conditions, it can suffer from severe corrosion. This defines its primary application window: harsh, reducing environments where stainless steels and even many nickel-based alloys would fail.
2. Nyob rau hauv cov ntawv thov tshwj xeeb yog Hastelloy B Sheet feem ntau tau teev tseg, thiab vim li cas thiaj muaj kev sib tw thiab hastelloy c-276 tsis haum?
Hastelloy B Sheet yog cov khoom siv ntawm kev xaiv rau kev tuav cov roj ntau tshaj plaws. Nws siv yog cov cai los ntawm qhov tseem ceeb los tuav cov cuab yeej ua kom ncaj ncees qhov twg lwm cov ntaub ntawv kom sai.
Hydrochloric acid (HCl) kev pab: Qhov no yog daim chij nyiaj txiag rau qhov kub thiab txias rau kev kub siab, ua rau muaj kev kub ntxhov, ua rau muaj kev cuam tshuam rau cov khoom siv npau npau, thiab cov txheej txheem hluav taws xob, thiab tshuaj lom neeg synthesis. Stainless hlau 316 yuav crounds loj hauv hlc, thiab thaum haastelloy c {4 4}}}}}}}} pa ntau dua muab kev pabcuam tshwj xeeb, tsis muaj oxidizing.
Sulfuric acid (h ₂so₄) kev pabcuam: nws ua rau pom cov sulfuric acid thoob plaws ntawm cov kev ua kom dav thiab qhov kub thiab txias, tshwj xeeb hauv qhov tsis muaj oxidizing impurities. Qhov no ua rau nws muaj nuj nqis hauv sulfuric acid alkylation units, acid rov qab cov khoom siv tshuaj, thiab cov khoom siv siv tshuaj lom neeg ua haujlwm.
Lwm cov ntawv thov tseem ceeb: Nws tseem dav siv rau kev tuav phosphoric acid, acetic acid, thiab lwm yam organic acids nyob rau hauv kev txo cov mob. Kev lag luam tshwj xeeb suav nrog:
Kws Tshuaj thiab cov tshuaj tua kab mob - rau cov hlab ntsha thiab cov hlab ntsha uas muaj siab, ua paug} kev ua kom tsis pub muaj yog qhov tseem ceeb.
Agnochemical: Hauv kev tsim cov tshuaj tua kab thiab tshuaj tua kab thiab tshuaj tua kab uas muaj feem xyuam nrog cov neeg muaj kev cuam tshuam corrosive.
Acid acidling thiab Tsheb Thauj Mus Los: Rau Tanker Cov La Hluav Taws Xob thiab Chaw Tso Tsheb Nres.
Vim li cas tsis c -}}}}? Hastelloy C-276 muaj cov chromium tseem ceeb (~ 16%), uas ua rau nws zoo heev rau cov sib xyaw ua ke acid (ob qho tib si oxidizing thiab txo tus kab mob chlorides. Txawm li cas los xij, nyob rau hauv ib puag ncig kev txo ib puag ncig zoo li kub, feeb molybdenum cov ntsiab lus ntawm hastellloy b muab nws ua kev ua tau zoo thiab feem ntau ua tau zoo thiab ntau tus nqi zoo dua. Xaiv B tshaj C-276 yog qhov kev txiav txim siab muaj kev lag luam muaj txiaj ntsig rau qhov tshwj xeeb, cov txheej txheem sab txhais lus zoo.
3. Dab tsi yog qhov kev txiav txim siab tseem ceeb rau vuam thiab cov hmoov av thiab cov hmoov xyoob xyoob los ntawm hastelloy B Sheet los xyuas kom muaj ntev- lub sijhawm ua haujlwm?
Cricating hastelloy b shot yuav tsum tau siv cov txheej txheem nruj tswj hwm nws corrosion tsis kam thiab cov khoom siv tshuab. Thawj qhov kev sib txawv yog kev tiv thaiv kev paug thiab tswj cov alloy tus cwj pwm ruaj khov.
Kev nyiam huv yog qhov sib kis: cov kev paug los ntawm hlau, tooj liab, lossis lwm yam hlau tuaj yeem tsim cov palting galitized. Ib yam li ntawd, cov pa roj carbon kev sib txuas los ntawm cov log sib tsoo lossis cov cuab yeej cim tuaj yeem ua rau muaj nag lossis daus thiab nag lossis daus. Yuav tsum ua cov ntaub ntawv yuav tsum tau ua nrog cov khoom siab, cov cuab yeej ntxuav hauv thaj chaw cais los ntawm cov hlau roj carbon lossis stainless hlau.
Vuam hlau thiab muab tubtiv hlau: hastelloy b muaj feem ntau welded siv cov roj tungsten arc vuam (gtaw / tig) txheej txheem.
Tus muab tub rog hlau: Kev xaiv goveellloy b}}} 2 cev siv los ua kom cov neeg siv hluav taws xob tsawg (}
Kev thaiv cov roj: kev tiv thaiv zoo heev uas muaj kev sib xyaw siab rau GTAWS) yog ib qho tseem ceeb rau GTAWBation Argon (hydrogten p pas dej Kom zoo rov qab -} purging ntawm lub hauv paus sab ntawm Weld tsis yog "qab zib" - ntxhib ecoded, thiab corroded weld undererside.
Kev tswj cov tswv yim Thaum tshav kub kub: kev tawm hws ntau dhau thaum lub sij hawm vuam lossis sib sau ua tau ob qho teeb meem:
Grain kev loj hlob: tuaj yeem txo kev txhim kho thiab tawv.
Carbide nag lossis daus: hauv tus qauv Hastelloy B, Carbon tuaj yeem ua ke nrog cov molybdenum {}℃f (650℃- 870 degree) ntau yam. Qhov depletes molybdenum los ntawm matrix nyob ze ntawm thaj tsam ntawm cov nplej zom, tsim cov chaw nyob kom muaj kev tawm tsam. Niaj hnub nimno alloy, hastelloy b-2, tau tsim nrog cov roj carbon thiab cov lus silicon tshwj xeeb kom txo cov rhiab no.
4. Yuav ua li cas cov kev ua tau zoo thiab daim ntawv thov B Sheet sib txawv txawv ntawm nws cov kev vam meej niaj hnub, haastelloy b-2 (tsis yog N10665)?
Thaum haastelloy b (n10001) yog qhov ua rau muaj kev cuam tshuam rau kev txhim kho ntawm Weld Haz tau ua rau kev txhim kho hastelloy B-2 (N10665). Qhov sib txawv yog qhov tseem ceeb rau cov engineers thiab cov ntaub tawm.
Cov teeb meem tseem ceeb nrog Hastelloy B: thawj cov hlau muaj cov roj carbon ntau dua thiab silicon. Thaum welded lossis kev ntxhov siab {{- relieved, nws tau nquag}} carbide precipitates los ntawm cov ciaj ciam av hauv lub taub hau. Qhov no ensitectized cheeb tsam no tuaj yeem yog qhov ua kom txaus siab los ntawm cov kua qaub, ua rau tsis muaj nyob rau hauv weld nws tus kheej, tab sis nyob rau hauv cov hlau tam sim ntawd ib sab ntawm nws.
Kev daws: Hastelloy b - 2: Qhov "thib ob" thib ob ntawm kev ua tau zoo los ntawm kev txo cov pa roj carbon ntau tshaj (<0.02%) and silicon (<0.10%) contents. This chemical adjustment significantly delays the kinetics of carbide formation, making the alloy much more stable during welding and fabrication. It is considered "non-sensitizable" under most practical welding conditions.
Qhov cuam tshuam rau Sheet Specification: Niaj hnub no, hastelloy B-2 tau yuav luag txhua tus thawj hastellloy b rau txhua qhov kev tsim kho tshiab. Thaum cov ntawv kos npe, nws yog yuav luag txhua zaus B-2 uas yog muab tshwj tsis yog muaj cov kev cai tshwj xeeb muaj. Tus Kakaw Kakabway yog tias B-2 yog ib yam zoo tib yam corrosion thiab nrog cov khoom siv tsis ua tiav thiab siv zog ua haujlwm ntawm lub neej.
5. Dab tsi yog cov khoom tseem ceeb thiab lub cev ntawm haastelloy b / 2 daim ntawv tsim qauv yuav tsum muaj rau kev tsim qauv?
Kev tsim qauv zoo nrog Hastelloy B Sheet yuav tsum nkag siab txog nws tus cwj pwm dhau ntawm nws cov tshuaj tua neeg.
Cov cuab yeej kho tshuab (ib txwm muaj rau cov ntawv qhia):
Lub zog tensile: ~ 130 ksi (896 mpa)
Tos lub zog (0.2% offset): ~ 65 ksi (448 mpa)
Elongation: ~ 50%
Cov nuj nqis no taw qhia cov khoom siv nrog lub zog siab, tab sis tseem ceeb dua, kev ua siab loj. Qhov kev loj elongation siab yog dab tsi tso cai rau kev tsim txom hnyav xws li kev kos duab sib sib zog nqus. Cov neeg tsim qauv yuav tsum siv cov yam tsawg kawg nkaus-}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}} Txoj kev cia siab rau kev suav rau kev ntxhov siab hauv siab thiab thauj khoom.
Lub cev lub cev:
Qhov ceev faj: ~ 0.334 lb / nyob rau hauv (9.24 g / cm³) - Nws yog qhov cuam tshuam ntau dua li cov hlau, uas yuav tsum tau ua rau qhov hnyav thiab kev suav cov nqi.
Thermal nthuav tawm coefficient: 5.8-6.2 x 10⁻⁶ /℃(20-100 degree). Qhov no qis dua li ntawm cov hlau tsis muaj stainless, uas yog qhov tseem ceeb thaum tsim cov kab ke nrog cov khoom sib xyaw kom tsis txhob muaj kev ntxhov siab.
Thermal conductivity: ~ 10.5 w / min. Qhov no yog qhov tsawg, zoo ib yam li lwm cov nickel alloys. Rau cov cua sov ua kom muaj kev tsim qauv cua sov, qhov kev coj ua qis dua yuav tsum tau txiav txim siab nrog corrosion tsis kam.
Ua haujlwm hnyav: zoo li cov nickel feem ntau, hastelloy b ua hauj lwm - hate hardens sai sai. Tus tsim qauv yuav tsum muaj rau qhov nce loj hauv lub zog thiab txo qis hauv detility uas tshwm sim thaum lub sijhawm yob lossis dov. Qhov no feem ntau tsim nyog nruab nrab analming cov kauj ruam rau kev fabriccicting nyuaj los rov ua kom rov kub thiab tiv thaiv kev tawg. Tsim nyog tuag radii thiab kev tsim cov ua ntu zus yog qhov tseem ceeb los tswj tus xeeb ceem no.
