1: Dab tsi yog qhov tseem ceeb ntawm kev tsim qauv metallurgical tom qab Incoloy 800H daim ntawv, thiab dab tsi ua rau nws txawv ntawm qib Incoloy 800?
Qhov "H" hauv Incoloy 800H sawv cev rau "siab-kub." Qhov no tsis yog qhov sib txawv me me tab sis lub hom phiaj ua tiav cov khoom siv nrog kev tswj cov chemistry thiab microstructure kom ua tau zoo tshaj plaws hauv cov cua sov. Qhov sib txawv tseem ceeb raug kaw hauv nws qhov tshwj xeeb (ASTM B409, UNS N08810 rau 800H):
Guaranteed Elevated Carbon: Incoloy 800H daim ntawv yuav tsum muaj cov ntsiab lus carbon nyob rau hauv thaj tsam ntawm 0.05-0.10%. Qhov siab dua, tswj cov pa roj carbon qib no muab cov khoom tseem ceeb- kev daws teeb meem ntawm qhov kub thiab txias, ncaj qha ua rau muaj zog nkag tau zoo dua.
Kev daws Annealing rau Coarse Grain: Lub alloy yuav tsum tau muab tshuaj annealed ntawm qhov tsawg kawg nkaus kub ntawm 2100℃F (1149℃). Qhov kev kho cua sov tshwj xeeb no tsim cov qauv ntxhib, equiaxed austenitic grain qauv (feem ntau ASTM Tsis yog. 5 lossis coarser). Ib coarser grain qauv txo tag nrho cheeb tsam ntawm grain ciam teb, uas yog cov thawj txoj kev rau creep deformation thiab tawg propagation nyob rau hauv kev ntxhov siab nyob rau hauv siab kub.
Kev ntxhov siab yam tsawg kawg nkaus -Rupture Properties: Cov lus qhia tshwj xeeb suav nrog kev ntxhov siab yam tsawg kawg nkaus - qhov tseem ceeb tawg, lav nws lub sijhawm ntev - lub sijhawm thauj khoom - muaj peev xwm ntawm qhov kub li 1500℃F (815℃). Qhov kev sib xyaw ua ke no ua rau Incoloy 800H daim ntawv tsim alloy rau siab -kev siv cov txheej txheem kub, hos tus qauv Incoloy 800 yog qhov dav dav dua.
2: Dab tsi yog qhov siab tshaj - qhov kub thiab txias ntawm Incoloy 800H daim ntawv, thiab lawv ua li cas rau nws cov ntawv thov kev lag luam?
Incoloy 800H daim ntawv ua tau zoo nyob rau hauv peb qhov tseem ceeb siab - qhov kub thiab txias, uas qhia ncaj qha rau nws cov kev siv feem ntau:
Exceptional Creep thiab Stress-Rupture Strength: Qhov no yog nws tus yam ntxwv txhais. Lub alloy tuav ib feem tseem ceeb ntawm nws lub zog nyob rau hauv tas li load ntawm qhov kub ntawm txog 1100℃F mus rau tshaj 1800℃F (593℃rau 982 degree). Qhov no ua rau nws cov khoom ntawm kev xaiv rau fabricated industrial furnace Cheebtsam xws li radiant tubes, muffles, retorts, thiab burner nozzles uas yuav tsum tsis txhob sag los yog rupture ntau xyoo ntawm kev pab cuam.
Qhov Zoo Tshaj Plaws rau Oxidation thiab Carburization: Nws tsim kom nruj, ua raws chromium- nplua nuj oxide nplai (Cr₂O₃) uas tiv thaiv lub hauv paus hlau los ntawm kev tawm tsam ntxiv hauv huab cua thiab combustion atmospheres. Qhov tseem ceeb tshaj, nws cov ntsiab lus nickel siab (kwv yees li 32%) muab cov txiaj ntsig zoo heev rau kev nqus pa (carburization) hauv hydrocarbon- thaj chaw nplua nuj. Qhov no yog vim li cas nws yog qhov tseem ceeb hauv ethylene cracking furnace liners, pigtails, thiab internals, qhov twg nws tiv taus cyclic raug rau cov pa roj pyrolytic.
Zoo Metallurgical Stability: Cov alloy tiv thaiv kev tsim ntawm kev puas tsuaj sigma thiab chi theem thaum lub sij hawm ntev - raug, uas muaj peev xwm embrittle lwm alloys. Qhov kev ruaj ntseg no ua kom ductility khaws cia rau thermal cycling.
3: Dab tsi yog qhov tseem ceeb ntawm kev tsim thiab vuam cov lus qhia tshwj xeeb rau kev ua haujlwm nrog Incoloy 800H daim hlau?
Fabricating Incoloy 800H daim ntawv yuav tsum muaj cov txheej txheem uas khaws nws cov qib siab - qhov kub thiab txias. Nws yog feem ntau weldable thiab formable, tab sis nrog cov caveats tseem ceeb:
Vuam: Gas Tungsten Arc Vuam (GTAW / TIG) thiab Shielded Hlau Arc Vuam (SMAW) yog qhov nyiam. Rau siab - qhov kub thiab txias, nws yog ib qho tseem ceeb uas yuav tsum tau siv qhov sib txuam lossis tshaj - cov hlau muab tub lim tsim rau qhov kub siab. Cov kev xaiv feem ntau suav nrog Inconel 625 muab tub lim (ERNiCrMo-3) rau lub zog zoo dua lossis sib piv Incoloy 800H muab tub lim (ERNiCr-3). Txhawm rau tiv thaiv kev kub ntxhov (chromium carbide nag lossis daus) hauv tshav kub- thaj tsam cuam tshuam (HAZ), tswj cov cua sov kom nruj (siv qis rau nruab nrab amperage, tsis txhob siv ntau dhau) thiab tswj qhov kub ntawm qhov sib cuam tshuam hauv qab 300℃F (149℃). Rau qhov siab tshaj plaws kev ua haujlwm kub hauv qhov vuam, feem ntau tau teev tag nrho cov tshuaj tom qab vuam anneal.
Kev tsim thiab txiav: Cov ntawv tuaj yeem ua txias tsim los ntawm cov khoom siv txheem, tab sis nws txoj haujlwm siab - hardening npaum li cas yuav tsum tau muaj zog ntau dua thiab nruab nrab annealing rau qhov deformation loj. Nws tuaj yeem yog shear-txiav, plasma- txiav, lossis waterjet- txiav. Rau kev txiav thermal, sib tsoo rov qab cov cua sov- cuam tshuam ntug yog pom zoo ua ntej vuam.
Kev kho cua sov: Daim ntawv yog muab rau hauv cov tshuaj -annealed mob. Txhua qhov kev tsim kub los yog kev kho cua sov tom qab yuav tsum zam qhov kev xav tau ntau yam (kwv yees li 1000℃F-1500℃F / 538℃-816 degree) tshwj tsis yog ua raws li qhov kawg kev daws teeb meem anneal thiab quench.
4: Qhov kev ua tau zoo thiab kev siv ntawm Incoloy 800H daim ntawv piv ncaj qha rau Incoloy 825 daim ntawv li cas?
Qhov kev sib piv no qhia txog qhov tseem ceeb ntawm kev tsim qauv sib txawv. Txawm hais tias ob qho tib si yog npib tsib xee- hlau-chromium alloys, lawv cov khoom sib xyaw tsom rau cov yeeb ncuab sib txawv.
Incoloy 800H: Optimized rau siab - kub lub zog thiab tsis kam rau gaseous corrosion (oxidation, carburization). Nws muaj pes tsawg leeg yog sib npaug rau stability thiab creep kuj, tsis muaj molybdenum los yog tooj liab.
Incoloy 825: Optimized rau aqueous corrosion kuj nyob rau hauv aggressive chemical thiab marine ib puag ncig. Nws cov additives tseem ceeb yog molybdenum (~ 3%) thiab tooj liab (~ 2%) los tawm tsam pitting thiab txo cov kua qaub xws li sulfuric acid.
Txoj Cai Xaiv: Koj yuav teev Incoloy 800H daim ntawv rau lub tshuab hluav taws xob, cov khoom siv hluav taws xob hloov pauv hauv lub tshuab hloov kho, lossis lub siab - qhov kub thiab txias. Koj yuav qhia Incoloy 825 daim ntawv rau lub tank hauv ob sab phlu, lub nkoj nqus dej, lossis cov khoom siv dej hiav txwv. Lawv tsis yog interchangeable. Kev siv 825 nyob rau hauv siab - daim ntawv thov kub creep yuav ua rau tsis ua hauj lwm, ib yam li kev siv 800H nyob rau hauv sulfuric acid yuav ua rau corrosion sai.
5: Dab tsi yog qhov tseem ceeb ntawm kev kuaj xyuas thiab cov qauv kev lag luam rau kev yuav daim ntawv Incoloy 800H?
Ua kom koj tau txais qhov tseeb, cov lus qhia tshwj xeeb- ua raws Incoloy 800H daim ntawv yog qhov tseem ceeb rau kev nyab xeeb thiab kev ua haujlwm. Cov kauj ruam tseem ceeb suav nrog:
Qhia kom raug tus qauv: Cov khoom siv tseem ceeb yog ASTM B409 / ASME SB409 rau phaj, ntawv, thiab sawb. Qhov tseem ceeb, koj yuav tsum qhia qib "H" (UNS N08810). Tsuas yog xaj "Incoloy 800" tuaj yeem ua rau tau txais tus qauv qib yam tsis muaj kev lees paub siab -kub khoom.
Yuav tsum tau Daim Ntawv Qhia Txog Kev Xeem Mill Certified (CMTR): Qhov no tsis yog -negotiable. Ib qho CMTR tsim nyog yuav tsum muaj xws li:
Thaum tshav kub kub / Kev ntsuas tus naj npawb rau tag nrho traceability.
Cov tshuaj muaj pes tsawg leeg ua pov thawj cov pa roj carbon monoxide yog nyob rau hauv 0.05-0.10% ntau thiab lwm cov ntsiab lus raws li N08810 txwv.
Mechanical Test Results ntawm chav tsev kub.
Grain Size Report lees paub ASTM Tsis muaj . 5 lossis coarser.
Nqe lus hais txog Kev kho cua sov kom paub meej tias cov tshuaj annealing tau ua raws li tus qauv.
Cov txiaj ntsig ntawm Kev Ntsuam Xyuas Tsis Zoo (yog tias tau teev tseg).
Kev soj ntsuam qhov pom thiab qhov ntev: Daim ntawv yuav tsum tsis pub dhau qhov ntsuas, qhov chaw, seams, lossis lwm yam tsis zoo ntawm qhov chaw uas tuaj yeem ua raws li cov ntsiab lus tsis ua haujlwm. Thickness thiab flatness yuav tsum raug txheeb xyuas raws li kev txiav txim siab (xws li ASTM A480).
