1. Q: ASTM B983 yog dab tsi, thiab nws txawv li cas los ntawm lwm cov kev qhia tshwj xeeb uas tswj cov kav dej nickel Alloy 718 seamless?
A: ASTM B983 Cov Khoom Siv Hluav Taws Xobyog tus qauv specification rau nag lossis daus-nickel hardening-chromium-hlau-niobium-molybdenum alloy (UNS N07718) seamless yeeb nkab thiab raj. Nws tau tsim tshwj xeeb los hais txog cov kev cai tshwj xeeb ntawm Alloy 718 hauv seamless tubular daim ntawv rau siab - kub, siab - kev siv siab. Kev nkag siab txog nws qhov txawv ntawm lwm qhov tshwj xeeb yog qhov tseem ceeb rau kev yuav khoom kom zoo.
Cov ntsiab lus ntawm Alloy 718 Specifications:Nickel Alloy 718 (UNS N07718) yog tswj hwm los ntawm ntau yam ASTM specifications nyob ntawm daim ntawv khoom:
ASTM B670 Cov Lus Qhia:Npog phaj, ntawv, thiab sawb
ASTM B637 Cov Lus Qhia:Npog tuav, forgings, thiab rings
ASTM B983 Cov Lus Qhia:Tshwj xeeb tshaj yog nyob rau seamless yeeb nkab thiab raj
Dab tsi ua rau ASTM B983 Cim:ASTM B983 tau qhia los daws cov teeb meem kev tsim khoom tshwj xeeb thiab cov kev xav tau zoo cuam tshuam nrog kev tsim cov Alloy 718 hauv seamless tubular daim ntawv. Cov specification muaj xws li:
Manufacturing Requirements:Nws tso cai tias cov yeeb nkab yuav raug tsim los ntawm cov txheej txheem seamless-txawm kub- tiav lossis txias - tiav- los ntawm cov khoom siv los yog cov khoom siv uas ua tau raws li cov txheej txheem nruj. Tsis zoo li cov welded yeeb nkab specifications, ASTM B983 yuav tsum tsis muaj cov seams longitudinal, tshem tawm ib tug tej zaum tsis ua hauj lwm taw tes nyob rau hauv siab - kev nyuaj siab.
Kev kho cua sov raws tu qauv:Cov lus qhia tshwj xeeb qhia txog qhov xav tau kev kho cua sov ua ntu zus rau Alloy 718 seamless yeeb nkab. Qhov no feem ntau suav nrog cov tshuaj anneal ua raws li los ntawm nag lossis daus-kev kho mob hnyav (kev laus). Tus qauv muab kev xaiv rau kev kho cua sov sib xyaw ua ke nyob ntawm seb qhov kev pabcuam xav tau, tso cai rau kev yuav khoom los qhia qhov tsim nyog rau daim ntawv thov.
Cov kev xav tau kev kuaj xyuas tsis raug:ASTM B983 suav nrog cov kev xeem nruj uas tsis muaj kev puas tsuaj ntau dua li ntau qhov dav dav -cov ntsiab lus tshwj xeeb, lees paub tias Alloy 718 seamless kav feem ntau yog lub hom phiaj rau kev pabcuam tseem ceeb. Kev kuaj ultrasonic, eddy tam sim no kuaj, lossis kuaj hydrostatic yuav tsum tau kuaj xyuas qhov tseeb ntawm cov yeeb nkab phab ntsa.
Dimensional tolerances:Cov lus qhia tshwj xeeb muab cov ncauj lus kom ntxaws qhov ntev rau sab nraud txoj kab uas hla, phab ntsa thickness, thiab ntev, paub tias precision yog qhov tseem ceeb rau cov ntawv thov uas muaj kev kub ntxhov thiab kub.
Sib piv nrog rau lwm yam Specifications:Thaum muab Alloy 718 seamless yeeb nkab, engineers yuav tsum xaiv qhov tsim nyog specification:
ASTM B983 Cov Lus Qhia:Cov ntsiab lus tseem ceeb rau seamless yeeb nkab thiab raj hauv nag lossis daus- mob hnyav. Nws yog qhov kev qhia tshwj xeeb tshaj plaws rau daim ntawv no cov khoom.
ASTM B637 Cov Lus Qhia:Feem ntau hais txog bar thiab forgings siv hauv cov yeeb nkab fittings thiab flanges, tab sis tsis npog cov khoom siv yeeb nkab ncaj qha.
TIAB SA 5589:Cov khoom siv dav hlau dav hlau npog Alloy 718 seamless tubing. Rau aerospace daim ntawv thov, AMS specifications feem ntau tswj nruj dua li ASTM cov qauv. ASTM B983 feem ntau suav hais tias yog kev lag luam- qib sib npaug, txawm tias ntau lub tuam txhab tsim khoom rau ob qho tib si.
Qhov cuam tshuam rau kev yuav khoom:Thaum qhia txog ASTM B983, cov neeg yuav khoom yuav tsum qhia:
Qhov kev kho cua sov yuav tsum tau ua (kev daws teeb meem -annealed lossis nag lossis daus- hardened)
Cov kev xeem uas tsis muaj kev puas tsuaj (ultrasonic, eddy tam sim no, lossis ob qho tib si)
Txhua yam kev xav tau ntxiv xws li kev ua kom nruj dua qhov ntev los yog kev sim ntxiv
Los ntawm kev qhia ASTM B983 es tsis yog ntau cov nickel alloy yeeb nkab specification, cov neeg yuav khoom xyuas kom meej tias cov khoom tsim, kuaj, thiab ntawv pov thawj tshwj xeeb rau cov kev xav tau ntawm Alloy 718 seamless yeeb nkab daim ntaub ntawv.
2. Q: Dab tsi yog qhov tseem ceeb ntawm metallurgical yam ntxwv ntawm Nickel Alloy 718 uas ua rau nws haum rau siab -kub seamless yeeb nkab daim ntaub ntawv, thiab ASTM B983 ua li cas hais txog cov yam ntxwv no?
A:Nickel Alloy 718 (UNS N07718) muaj kev sib xyaw ua ke ntawm cov yam ntxwv ntawm cov khoom siv hlau uas ua rau nws zoo heev - haum rau siab - kub seamless yeeb nkab daim ntaub ntawv. ASTM B983 suav nrog cov kev cai tshwj xeeb tsim los xyuas kom meej tias cov yam ntxwv no tau tsim thiab txheeb xyuas hauv daim ntawv seamless tubular.
Lub Gamma-ob npaug-Prime Strengthening Mechanism:Tsis zoo li ntau lwm cov npib tsib xee-raws li superalloys uas tso siab rau gamma-prime (') nag lossis daus rau kev ntxiv dag zog, Alloy 718 muab nws cov khoom tshwj xeeb feem ntau los ntawmgamma-double-prime ('')precipitates-Ni₃Nb-nrog rau cov pej xeem ntxiv ntawm gamma-prime (') precipitates. Qhov no dual -precipitate microstructure muaj ntau yam zoo:
Slow overaging kinetics:Lub gamma-ob npaug- theem tseem ceeb coarsens ntawm tus nqi qis dua gamma-prime ntawm qhov kub siab. Qhov no txhais tau tias Alloy 718 tuav nws lub zog ntev dua thaum lub sij hawm txuas ntxiv siab - qhov kub thiab txias kev pab cuam piv rau cov alloys uas tsuas yog tso siab rau gamma - prime zog.
Fabricability nyob rau hauv cov tshuaj -annealed mob:Cov nag lossis daus -cov lus teb ntawm Alloy 718 yog qhov qeeb qeeb, uas txhais tau hais tias cov khoom khaws cia txaus ductility thaum lub sij hawm fabrication nyob rau hauv cov tshuaj -annealed mob. Cov yam ntxwv no tseem ceeb tshwj xeeb rau kev tsim cov yeeb nkab seamless, uas cuam tshuam qhov kub thiab txias deformation.
Weldability:Alloy 718 nthuav dav weldability zoo heev rau nag lossis daus- alloying hardening. Cov lus teb qeeb qeeb yuav txo tau qhov kev pheej hmoo ntawm strain- muaj hnub nyoog tawg thaum lub sij hawm tom qab-weld heat treatment-ib qho tseem ceeb rau cov yeeb nkab tshuab uas yuav tsum tau siv welding.
Compositional Control:ASTM B983 tswj hwm cov kev txwv nruj nruj uas ua kom muaj kev txhim kho zoo ntawm gamma -ob npaug -prime microstructure:
Niobium (Nb):4.75% mus rau 5.50% - lub ntsiab tseem ceeb rau gamma-ob npaug-prime formation
Aluminium (Al):0.20% mus rau 0.80% thiabTitanium (Ti):0.65% rau 1.15% - pab txhawb rau gamma- nag lossis daus
Chromium (Cr):17.0% rau 21.0% - muab oxidation thiab corrosion kuj
Molybdenum (Molybdenum):2.80% mus rau 3.30% - pab txhawb zog- daws teeb meem
Hlau (Fe):Qhov nyiaj tshuav - muab tus nqi- ua tau zoo thiab ruaj khov
Kev kho cua sov yuav tsum muaj:ASTM B983 qhia txog cov txheej txheem kho cua sov uas ua kom muaj kev txhim kho kom zoo ntawm kev txhim kho microstructure. Tus qauv feem ntau xav tau:
Kev daws annealing:Cua sov rau 927℃mus rau 1010℃(1700℃F mus rau 1850℃F) ua raws li los ntawm kev txias ceev kom yaj precipitates thiab ua tiav ib homogeneous microstructure
Precipitation hardening:Feem ntau ob -kev laus kev kho mob-718℃(1325℃F) rau 8 teev, rauv txias rau 621℃(1150℃F), tuav rau 8 teev, ces cua txias
Lub voj voog kev laus no ua rau muaj kev sib faib ntawm cov gamma zoo-ob npaug-prime thiab gamma-prime precipitates uas muab cov alloy kos npe ua ke ntawm lub zog tensile siab, nkag siab, thiab thermal stability.
Microstructural Stability:Cov lus qhia tshwj xeeb lees paub tias Alloy 718's microstructure tseem ruaj khov thaum lub sij hawm ntev raug ntawm qhov kub txog li 650℃(1200℃F). Qhov kev ruaj ntseg no yog qhov tseem ceeb rau kev siv cov yeeb nkab seamless hauv cov roj turbines, lub zog tsim hluav taws xob, thiab cov khoom siv tshuaj ua haujlwm uas ua haujlwm tsis tu ncua ntawm qhov kub siab.
Yuav tsum muaj pov thawj:ASTM B983 yuav tsum tau ua pov thawj ntawm kev mob metallurgical los ntawm:
Kev ntsuam xyuas cov cuab yeej cuab tam kom paub meej tias qhov ua tau zoo ntawm kev kho cua sov
Kev txiav txim siab loj ntawm cov nplej kom ntseeg tau tias microstructure zoo ib yam
Kev tshuaj xyuas tsis muaj kev puas tsuaj los xyuas qhov tsis muaj qhov tsis xws luag uas tuaj yeem cuam tshuam qhov ncaj ncees ntawm nag lossis daus-txheej microstructure
Los ntawm kev qhia ASTM B983, cov neeg yuav khoom xyuas kom meej tias cov yam ntxwv tseem ceeb ntawm cov khoom siv hlau no tau tsim thiab txheeb xyuas hauv cov khoom siv yeeb nkab seamless.
3. Q: Dab tsi yog qhov tshwj xeeb fabrication thiab vuam kev txiav txim siab rau ASTM B983 Nickel Alloy 718 seamless kav, thiab cov hlau muab tub lim tau pom zoo li cas?
A:Kev tsim thiab vuam ntawm ASTM B983 Nickel Alloy 718 seamless kav yuav tsum tau tshwj xeeb cov txheej txheem uas muaj kev cuam tshuam cov alloy cov nag lossis daus -cov yam ntxwv hardening thiab nws cov lus teb rau thermal cycling. Cov txheej txheem tsim nyog yog qhov tseem ceeb kom ua tiav cov vuam vuam uas tswj cov khoom siv sib piv nrog cov hlau hauv paus.
Fabrication in the Solution-Annealed Condition:Alloy 718 feem ntau yog tsim nyob rau hauv cov kev daws teeb meem -annealed mob, qhov twg nws nthuav tawm:
Tensile zog:Kwv yees li 125 ksi (860 MPa)
Yield zog:Kwv yees li 55 ksi (380 MPa)
Elongation:Kwv yees li 30% txog 40%
Hauv qhov xwm txheej no, cov khoom siv tau zoo txaus rau kev ua haujlwm xws li khoov, kos duab txias, thiab machining. Txawm li cas los xij, ntau yam yuav tsum tau saib xyuas:
Ua hauj lwm hardening:Alloy 718 ua hauj lwm hardens sai thaum lub caij txias. Rau txoj kev khoov los yog qhov tseem ceeb deformation, nruab nrab cov tshuaj annealing yuav tsum tau los kho cov ductility.
Machining:Lub alloy nyhav ua hauj lwm harden thaum lub sij hawm machining, yuav tsum tau ntse carbide tooling, zoo rake ces kaum, thiab zoo tib yam pub. Slowing txiav ceev thiab tswj cov cuab yeej tas li yog qhov tseem ceeb kom tsis txhob muaj qhov tawv tawv.
Contamination tswj:Zoo li lwm cov nickel-raws li alloys, Alloy 718 yog qhov nkag siab rau cov kab mob sib kis los ntawm leej faj, txhuas, zinc, thiab lwm yam qis - melting - ntsiab lus. Fabrication cov cuab yeej thiab cov chaw ua haujlwm yuav tsum tau mob siab rau kev ua haujlwm nickel alloy.
Cov txheej txheem vuam:Gas Tungsten Arc Vuam (GTAW/TIG) yog cov txheej txheem nyiam rau vuam Alloy 718 seamless yeeb nkab, tshwj xeeb tshaj yog rau cov ntawv thov tseem ceeb. Cov ntsiab lus tseem ceeb suav nrog:
Kub input tswj:Kev tswj cov hluav taws xob hluav taws xob yog qhov tseem ceeb kom txo qis kev cuam tshuam thiab tiv thaiv kev loj hlob ntawm cov qoob loo ntau dhau hauv tshav kub- cuam tshuam. Interpass kub yuav tsum tau khaws cia qis dua 150℃(300℃F).
Shielding Gas:Argon lossis argon-helium sib tov muab kev tiv thaiv txaus. Rau cov hauv paus hla ntawm cov yeeb nkab welds, rov qab purging nrog argon yog qhov tseem ceeb los tiv thaiv oxidation sab hauv.
Kev npaj sib koom:Tag nrho -kev nkag mus welds nrog kev sib koom ua ke kom zoo- feem ntau ib leeg -V lossis ob npaug -V kev npaj- yog xav tau rau siab- muaj cov ntawv thov.
Filler Hlau Xaiv:Kev xaiv cov hlau muab tub lim yog qhov tseem ceeb rau kev ua tiav cov khoom siv vuam uas ua rau cov hlau puag. Cov kev xaiv tseem ceeb suav nrog:
ERNiCrFe-7 (Inconel 718 muab tub lim):Qhov kev sib xyaw ua ke ntawm cov khoom siv hlau no yog tsim tshwj xeeb rau Alloy 718. Thaum post-weld kub kho, nws ua tiav cov khoom siv sib piv rau cov hlau hauv paus.
ERNiCr-3 (Inconel 82):Cov hlau muab tub lim no muaj qhov zoo ductility thiab qee zaum siv rau cov ntawv tsis yog -tseem ceeb uas tsis tas yuav muaj zog sib xws. Txawm li cas los xij, nws tsis ua tiav tib lub nag lossis daus - lub zog ua kom muaj zog raws li qhov sib txuam muab tub lim.
Ncej -Kev kho cua sov:Rau cov ntawv thov uas yuav tsum tau ua kom tag nrho siab - qhov kub thiab txias ntawm Alloy 718, welded yeeb nkab sib dhos yuav tsum tau txais kev tshaj tawm -weld heat treatment. Cov txheej txheem ib txwm muaj xws li:
Kev daws annealing:Cua sov rau 927℃txog 1010℃(1700℃F txog 1850℃F) kom yaj cov dej nag hauv qhov cua sov- thaj tsam cuam tshuam
Precipitation hardening:Tus txheej txheem ob -kev laus kev kho mob
Txawm li cas los xij, rau cov rooj sib txoos uas tsis tuaj yeem kho cua sov tom qab vuam vim qhov kev txwv loj, yuav tsum tau ua tib zoo xav txog cov kev pabcuam. Alloy 718 nthuav tawm qhov tsim nyog raws li -welded lub zog, tab sis thaj tsam weld yuav tsis ua tiav tib qho kev tawm tsam raws li nag lossis daus- cov hlau hnyav hnyav.
Stress Corrosion Cracking Considerations:ASTM B983 Alloy 718 seamless yeeb nkab feem ntau tiv taus kev ntxhov siab corrosion tawg nyob rau hauv ntau qhov chaw. Txawm li cas los xij, cov rooj sib txoos welded yuav tsum tau tsim los txo qis cov kev ntxhov siab uas seem, thiab tom qab-weld kho cua sov yog pom zoo rau cov kev pabcuam tseem ceeb los txo cov kev ntxhov siab seem thiab rov ua kom cov nag lossis daus- cov khoom siv tawv tawv hauv thaj tsam weld.
4. Q: Hauv cov ntawv thov tseem ceeb thiab kev lag luam dab tsi yog ASTM B983 Nickel Alloy 718 seamless kav feem ntau siv, thiab cov yam ntxwv ua tau zoo li cas rau cov kev xaiv no?
A:ASTM B983 Nickel Alloy 718 seamless kav dej tau teev tseg rau qee qhov kev thov tshaj plaws thoob plaws aerospace, lub zog, thiab siab -kub kev lag luam. Cov khoom sib xyaw ua ke tshwj xeeb ntawm cov khoom- siab- qhov kub thiab txias, kev tiv thaiv corrosion, thiab thermal stability- ua rau nws cov khoom xaiv qhov tsis ua haujlwm tsis yog qhov kev xaiv.
Aerospace thiab Gas Turbine Daim Ntawv Thov:Kev lag luam aerospace sawv cev rau ib qho ntawm cov neeg siv khoom loj tshaj plaws ntawm Alloy 718 seamless yeeb nkab. Cov ntawv thov tseem ceeb suav nrog:
Hydraulic thiab roj kab:Hauv cov tshuab dav hlau thiab airframes, Alloy 718 seamless tubing yog siv rau siab -siab hydraulic systems thiab roj xa cov kab uas yuav tsum tau tiv taus qhov kub thiab txias thiab siab thaum tswj cov pa tawm- nruj nruj.
Cav bleed air systems:Cov tshuab no rho tawm siab - kub, siab - cua siab los ntawm lub cav compressors rau cabin pressurization thiab tiv thaiv - icing. Alloy 718 cov kav dej tuav lawv lub zog ntawm qhov kub siab tshaj 650℃(1200℃F) qhov twg stainless hlau yuav muag.
Thrust reverser actuators:Kev sib xyaw ua ke ntawm lub zog thiab kev tiv thaiv corrosion yog qhov tseem ceeb rau cov khoom raug rau ob qho tib si kub thiab de{0}} cov kua dej icing.
Cov tsav tsheb ua haujlwm:Hauv kev siv aerospace, cov khoom siv lub zog siab - rau - qhov hnyav piv, thermal stability, thiab tsis kam mus rau hydrogen embrittlement yog qhov tseem ceeb. Kev tsim kho seamless tshem tawm cov vuam seams uas tuaj yeem ua haujlwm tsis ua haujlwm pib cov ntsiab lus hauv kev thauj khoom cyclic.
Kev Tshawb Fawb Roj thiab Roj:Hauv kev siv downhole thiab subsea, Alloy 718 seamless kav yog siv rau:
Subsea tswj kab:Cov me me no - txoj kab uas hla tubing tshuab xa cov cim hydraulic rau subsea li qub thiab cov khoom siv. Cov hlau tsis kam rau seawater corrosion thiab hydrogen sulfide (kev pabcuam qaub) yog qhov tseem ceeb rau kev siv dej tob.
Cov yam ntxwv ntawm Wellhead:Alloy 718 seamless tubing yog siv rau hauv cov cuab yeej siv thiab cov tshuaj txhaj tshuaj uas yuav tsum tau tiv taus kev kub ntxhov, corrosive zoo kua, thiab siab kub.
High-siab risers:Rau ultra- daim ntawv thov dej sib sib zog nqus, kev sib xyaw ua ke ntawm lub zog siab thiab kev tiv thaiv corrosion ua rau Alloy 718 yog cov khoom nyiam rau cov khoom tseem ceeb riser.
Cov tsav tsheb ua haujlwm:Cov khoom siv tiv thaiv sulfide stress cracking (SSC) thiab chloride stress corrosion cracking (SCC) nyob rau hauv cov kev pabcuam qaub (ib NACE MR0175 / ISO 15156) yog qhov tseem ceeb xaiv.
Kev tsim hluav taws xob:Nyob rau hauv ob qho tib si pa thiab nuclear fais fab nroj tsuag, Alloy 718 seamless kav ua hauj lwm tseem ceeb:
Nuclear reactor Cheebtsam:Alloy 718 yog siv rau kev tswj cov pas nrig tsav mechanisms thiab ntsuas tubing hauv nuclear reactors, qhov twg cov khoom sib xyaw ua ke ntawm siab - kub lub zog, neutron irradiation kuj, thiab corrosion kuj yog qhov tseem ceeb.
Gas turbine roj systems:Hauv kev sib xyaw ua ke - lub voj voog fais fab nroj tsuag, Alloy 718 tubing xa cov roj rau cov roj turbine combustors, qhov uas nws yuav tsum tiv taus ob qho tib si kub thiab corrosive los ntawm roj impurities.
Cov tsav tsheb ua haujlwm:Kev tawm tsam ntawm qhov kub siab, ntev - lub sij hawm microstructural stability, thiab tsis kam mus rau siab -kub oxidation yog thawj qhov kev txiav txim siab.
High -Tsub Chemical Processing:Hauv cov nroj tsuag tshuaj ua haujlwm ntawm qhov kub siab, Alloy 718 seamless kav yog siv rau:
Hydrogen reformer instrumentation:Cov hlau tsis kam tiv thaiv hydrogen nres ntawm qhov kub siab ua rau nws tsim nyog rau kev saib xyuas cov kab hauv hydrogen ntau lawm.
Thaum tshav kub kub exchanger tubing:Qhov twg cov txheej txheem kub tshaj qhov muaj peev xwm ntawm stainless hlau, Alloy 718 muab qhov tsim nyog lub zog thiab corrosion kuj.
Pyrolysis thiab cracking furnace Cheebtsam:Hauv cov nroj tsuag petrochemical uas tsim cov ethylene thiab lwm yam olefins, Alloy 718 tubing tuav nws lub zog nyob rau hauv qhov kub thiab txias ntawm pyrolysis furnaces.
Cov tsav tsheb ua haujlwm:Kev ua haujlwm rau carburization, siab -kub oxidation, thiab thermal qaug zog yog qhov tseem ceeb hauv cov ntawv thov no. Kev tsim kho seamless tshem tawm cov vuam seams uas tuaj yeem nyiam tawm tsam hauv cov huab cua carburizing.
5. Q: Dab tsi yog qhov tseem ceeb ntawm kev ruaj ntseg zoo thiab kev kuaj xyuas tsis zoo uas tau teev tseg hauv ASTM B983 rau Nickel Alloy 718 seamless kav?
A:ASTM B983 tsim kom muaj kev ruaj ntseg zoo thiab tsis muaj kev puas tsuaj (NDE) cov kev cai uas cuam tshuam txog qhov tseem ceeb ntawm cov ntawv thov uas Alloy 718 seamless kav feem ntau tau teev tseg. Kev nkag siab txog cov kev xav tau no yog qhov tseem ceeb rau ob qho tib si kev yuav khoom thiab cov neeg ua haujlwm zoo.
Material Certification thiab Traceability:Lub hauv paus ntawm kev lees paub zoo raws li ASTM B983 yog cov ntaub ntawv pov thawj zoo. Txhua lub yeeb nkab yuav tsum tau nrog cov ntaub ntawv uas suav nrog:
Tshuaj ntsuam xyuas:Kev txheeb xyuas tias cov khoom ua tau raws li qhov kev txwv tsis pub muaj rau Alloy 718 (UNS N07718), suav nrog tag nrho kev tshuaj xyuas ntawm cov ntsiab lus tseem ceeb thiab kab.
Mechanical zog:Tensile lub zog, tawm lub zog, elongation, thiab txo qhov chaw rau qhov kev kho cua sov tshwj xeeb
Cov ntaub ntawv kho cua sov:Cov ntaub ntawv ntawm cov tshuaj annealing thiab nag lossis daus- lub voj voog tawv tawv, suav nrog lub sijhawm- cov kab kos kub
Manufacturing keeb kwm:Traceability rau tus thawj ingot los yog billet los ntawm cov yeeb nkab tau tsim
Nondestructive Examination Requirements:ASTM B983 xav kom NDE ntawm tag nrho cov yeeb nkab khoom los xyuas qhov tsis muaj qhov tsis xws luag uas tuaj yeem cuam tshuam cov kev pabcuam kev ua haujlwm. Cov kev qhia tshwj xeeb tso cai rau ntau txoj hauv kev xeem, txhua tus nrog cov qauv lees paub tshwj xeeb:
Kev kuaj ultrasonic (UT):Qhov no yog txoj kev nyiam tshaj plaws rau kev kuaj ntsuas ntawm cov yeeb nkab seamless. Qhov tshwj xeeb xav kom cov yeeb nkab yuav tsum tau soj ntsuam ultrasonically dhau nws qhov ntev thiab ib puag ncig siv cov cuab yeej ntsuas ntsuas. Kev lees txais cov qauv feem ntau yog raws li kev sib piv ntawm cov teeb liab amplitudes rau cov qauv siv uas muaj cov khoom tsis xws luag ntawm qhov ntau thiab tsawg.
Eddy tam sim no xeem (ET):Rau me me - txoj kab uas hla tubing qhov kev kuaj ultrasonic tej zaum yuav ua tsis tau, eddy kev sim tam sim no yog ib qho kev siv tau. Txoj kev no kuaj pom qhov chaw thiab nyob ze - deg defects. Cov lus qhia tshwj xeeb yuav tsum tau ua qhov kev sim ntsuas tam sim no uas siv cov qauv siv nrog cov qhov drilled los yog notches rau calibrate rhiab heev.
Kev kuaj Hydrostatic:Raws li lwm txoj hauv kev los yog ntxiv rau UT lossis ET, ASTM B983 tso cai kuaj hydrostatic. Cov yeeb nkab yuav tsum tau nias rau qhov ntsuas qhov ntsuas siab (feem ntau suav kom ua tiav qhov kev ntxhov siab ntawm ib feem pua ntawm qhov ntsuas qhov tsawg kawg nkaus lub zog) thiab tuav rau lub sijhawm txaus los txheeb xyuas cov xau. Tsis tso cai tawm.
Yuav tsum tau xeem ntawv ntxiv:Rau cov ntawv thov tseem ceeb, ASTM B983 tso cai rau cov kev cai ntxiv kom tau teev tseg thaum lub sijhawm yuav khoom:
Kev ntsuas hluav taws xob (RT):Rau qhov hnyav - cov yeeb nkab phab ntsa lossis qhov chaw kuaj ntsuas qhov tshwj xeeb ntawm qhov tsis xws luag
Kev kuaj kua dej (PT):Rau qhov kev ntsuam xyuas saum npoo, tshwj xeeb tshaj yog nyob rau hauv cov yeeb nkab kawg thiab hauv cheeb tsam uas UT lossis ET tej zaum yuav muaj kev cuam tshuam tsawg
Tag nrho -ntev ultrasonic kuaj:Nrog cov txheej txheem lees paub nruj dua li qhov yuav tsum tau ua hauv paus
Dimensional soj ntsuam:ASTM B983 xav kom txhua cov yeeb nkab raug tshuaj xyuas kom ua raws li qhov yuav tsum tau ua, suav nrog:
Sab nraud txoj kab uas hla:Kev kam rau ib qho kev qhia tshwj xeeb, feem ntau ± 0.010 ntiv tes rau qhov ntau thiab tsawg mus rau qee qhov ntev
Phab ntsa thickness:Qhov tsawg kawg nkaus phab ntsa thickness ntawm txhua qhov chaw yuav tsum tsis txhob poob qis dua tus nqi teev
Ntev:Txheem ntev los yog kev cai ntev raws li tau teev tseg
Ncaj nraim:Qhov siab tshaj qhov sib txawv ntawm ib chav tsev ntev, tshwj xeeb yog qhov tseem ceeb rau cov raj siv hauv kev ntsuas thiab tswj cov tshuab
Mechanical Test Requirements:Txhawm rau kom paub tseeb tias kev kho cua sov tau ua tiav cov khoom xav tau, ASTM B983 yuav tsum muaj kev sim ntsuas cov neeg sawv cev:
Tensile xeem:Nyob rau hauv chav tsev kub thiab, thaum teev, nyob rau hauv siab kub
Kev kuaj Hardness:Rau cov hom phiaj tswj kom zoo thiab ua tus neeg sawv cev rau cov nag lossis daus hardening
Kev ntsuam xyuas flattening:Rau cov yeeb nkab ntawm qee qhov ntau thiab tsawg, kom paub tseeb ductility
Rov qab flattening test:Rau cov yeeb nkab npaj rau kev nthuav dav lossis kev ua haujlwm flaring
Kev txheeb xyuas thiab cim:ASTM B983 yuam kom txhua cov yeeb nkab raug cim nrog:
Tus neeg tsim khoom lub npe lossis lub cim lag luam
Tus lej Specification (ASTM B983)
Alloy npe (UNS N07718 lossis Alloy 718)
Thaum tshav kub kub tooj rau traceability
Loj (nominal txoj kab uas hla thiab phab ntsa thickness)
Cov xwm txheej (kev daws teeb meem-annealed lossis nag lossis daus- tawv)
Thib peb-Kev soj ntsuam tog:Rau cov ntawv thov tseem ceeb, ASTM B983 tso cai rau thib peb- kev tshuaj xyuas tog ntawm qhov chaw tsim khoom. Thaum tau teev tseg, tus neeg yuav khoom tuaj yeem koom nrog lub koom haum soj ntsuam ywj pheej los ua pov thawj kev tsim khoom, kev kho cua sov, kev kuaj xyuas tsis zoo, thiab kev sim tshuab.
Cov ntaub ntawv khaws cia:Tag nrho cov ntawv pov thawj, cov ntawv xeem, thiab cov ntaub ntawv soj ntsuam yuav tsum tau khaws cia los ntawm cov chaw tsim khoom rau lub sijhawm teev tseg thiab ua kom muaj rau tus neeg yuav khoom thaum thov. Cov ntaub ntawv no muab cov traceability tseem ceeb rau kev siv hauv aerospace, nuclear, thiab lwm yam kev lag luam tswj.
