1. Dab tsi yog qhov tseem ceeb ntawm kev xaiv welded yeeb nkab hla seamless yeeb rau cov nickel alloys- o;
Qhov kev xaiv nruab nrab ntawm welded thiab seamless yeeb nkab yog qhov kev txiav txim siab thiab kev txiav txim siab technical. Rau cov npe sau alloys, Welded cov yeeb nkab muaj cov txiaj ntsig tseem ceeb hauv cov nqi thiab muaj rau qee cov ntawv thov, tab sis nrog kev xav tseem ceeb.
Qhov Zoo Ntawm Welded Yeeb Nkab:
Tus nqi - ua tau zoo: qhov no yog thawj tsav tsheb. Welded yeeb nkab feem ntau yog 20-50 tsawg tsawg dua li seamless yeeb nkab ntawm tib loj thiab alloy. Cov txheej txheem tsim khoom (sib sau thiab vuam coil lossis phaj) yog siv tau ntau dua thiab muaj txiaj ntsig ntau dua li cov yeeb nkab nyuaj siv rau seamless yeeb.
Muaj ntau qhov ntau thiab tsawg: Welded yeeb nkab yog qhov kev xaiv ntawm cov txheej txheem loj (piv txwv li, dhau ntawm 24 ntiv taw hnyav. Kev tsim cov yeeb nkab seamless hauv cov qhov ntev no yog cov kev nyuaj ua haujlwm thiab txwv tsis pub kim.
Kev txawv dua qub ua tiav (ID / OD): cov khoom siv pib (chev lossis phaj) feem ntau muaj qhov chaw zoo dua thiab muaj ntau dua cov yeeb nkab. Qhov no tuaj yeem muaj txiaj ntsig zoo rau corrosion tsis kam thiab ua kua ntws.
Ntaster Phab Ntsa Thickness Kev Ua Phiab yog dov mus rau ib qho tuab tuab, uas ua rau muaj cov yeeb nkab uas muaj ntau dua ntawm cov yeeb nkab.
Muaj peev xwm ua lag luam - Offs thiab mitigations:
Weld Kev Ncaj Ncees: Lub ntsej muag Weld yog qhov tseem ceeb ntawm kev ua tsis tiav. Nws yuav tsum tau ceev faj txog kev ua kom zoo nkauj thiab 100% xyuas kom nws tsis muaj qhov tsis xws luag zoo li tsis muaj fusion, porosity, lossis tawg.
Anisotropic cov khoom: Cov khoom siv tshuab thiab cov corrosion tsis kam nyob rau hauv weld thiab tshav kub}}} kub cuam tshuam los ntawm cov hlau. Tsim nyog muab tub lim xaiv hlau thiab vuam vuam yog qhov tseem ceeb los txo qhov no.
Kev nkag siab thiab kev qhia tshwj xeeb: Refmite niaj hnub txhim kho, piv txwv li cov enmacic specc (piv txwv li cov yeeb nkab BPVC seem I) tuaj yeem yuam kev tawm ntawm cov keeb kwm ua ntej.
Xaus: Welded yeeb nkab yog ib qho zoo heev, kev xaiv muaj txiaj ntsig zoo rau qhov tsis sib xws los ntawm tsis yog qhov tseeb los ntawm radiography lossis ultrasonics. Nws yog dav siv rau cov txheej txheem tsim qauv, hloov kab, thiab cov qauv txheej txheem uas cov nqi txuag tau ua rau muaj kev pheej hmoo.
2. Yuav ua li cas cov txheej txheem vuam rau kev corrosion- resistant alloy- kub lub zog alloy zoo li incoloy 800ht?
Cov txheej txheem vuam tau txiav kom khaws cov khoom ntiag tug tseem ceeb uas cov alloy tau xaiv. Lub hom phiaj rau 825 yog txhawm rau tswj cov corrosion tsis kam, thaum rau 800HT, nws yog los khaws cia siab- lub zog thiab ruaj khov.
Vuam incoloy 825 (corrosion tsis kam tsom):
Kev sib tw tseem ceeb: tiv thaiv "Weld lwj" lossis qhov tsis zoo. Qhov no tshwm sim thaum chromium carbides precipated hauv lub taub, depleting cov ntsiab lus chromium hauv zos thiab ua rau nws ntxim rau kev mob ntsws.
Alloy Tsim: 825 yog "stabilized" nrog titanium, uas nyiam sib xyaw nrog carbon, tiv thaiv chromium depetion.
Vuam xyaum:
Muab tub rog hlau: siv cov khoom sib xyaw ua ke zoo li ernifecr-1 (inconel 625 yog qhov tseem ceeb rau nws cov pitting zoo tshaj).
Tsawg lub tshav kub tawm: ntiav cov hlua khi hlua khi thiab tswj kev cuam tshuam qhov kub thiab txias (max ~ 150℃f) kom txo lub sijhawm hauv qhov rhiab.
Rov qab ntxuav tawm: Qhov tseem ceeb siv cov roj inert (Argon) ntawm lub hauv paus sab kom tiv thaiv oxidation thiab tsim ntawm qhov qis}, muaj qhov paug, paug cag ntoo.
Vuam incoloy 800ht (high-} kub ua kom pom tseeb):
Kev sib tw tseem ceeb: txuag tau lub zog nkag siab thiab ductility hauv weld cheeb tsam. Lub ntsiab lus Al thiab TI nyob rau hauv 800HT yog qhov tseem ceeb rau kev ua kom muaj zog zuj zus.
Alloy Tsim: 800HT tau ua tib zoo tswj hwm qib al, ti, thiab carbon rau kev ua siab zoo-}} kub ua tau zoo.
Vuam xyaum:
Muab tub lim hlau: Siv tus muab tub lim hlau tsim rau high-}} ernifecr-1 lossis ernicr-3 (inconel 82). Lub Weld yuav tsum muaj lub zog zoo sib xws thiab ductility ntawm qhov kub thiab txias.
Cov tswv yim tshav kub tswj: thaum tseem tswj hwm, lub hom phiaj yog nyob rau kev ua tiav tag nrho cov kev nkag thiab lub suab weld profile kom tsis txhob muaj kev ntxhov siab uas tuaj yeem pib ua cov kab nrib pleb.
Tshaj tawm - Weld Kev Kho Mob Kub (PWtht
3. Dab tsi yog lub hom phiaj tshwj xeeb ntawm Monel R405, thiab vim li cas nws tsis zoo haum rau tsis siv neeg machining rau cov yeeb nkab?
Monel R405 (tsis yog n04405) yog ib qho pub dawb- tshuab ua ke yog ze li ntawm Monel 400.
Cawmseej thiab tshuab:
Qhov ntxiv ntawm cov neeg Sulphur cov ntaub ntawv suav nrog manganese sulfide tsis pub dhau cov qauv metallurgical. Cov suav nrog ua raws li ua-} hauv nti cov nroj tsuag thaum lub tshuab. Qhov no ua rau:
Luv luv, brittle chips: es tsis ntev, tawv nqaij, tawv nqaij tawv yog qhov me me, tawg cov chips uas tau yooj yim tshem tawm ntawm thaj chaw machining.
Ntau ntxiv machining nrawm: tso cai rau kev pub dua siab dua tus nqi thiab txiav ceev.
Txhim kho saum npoo: txo cov cuab yeej hnav thiab ua {- up ntug, ua kom tiav zoo.
Txuas lub neej: tsawg dua kev txiav cov rog thiab kub tsim tawm, txo cov cuab yeej hnav.
Daim ntawv thov hauv Welded Yeeb Nkab Lub Tshuab:
Thaum tsis siv rau lub siab -} muaj cov khoom siv hluav taws xob), Monel R40 2}- It allows for the high-volume, economical production of complex threaded components that would be prohibitively expensive and time-consuming to machine from standard Monel 400.
Nev pauv - tawm:
4. Rau siab {- kub kev pab, dab tsi yog qhov kev nce qib 800, 800Ht, thiab ua li cas qhov cuam tshuam, thiab yuav ua li cas qhov kev xaiv Welded?
Qhov kev nce qib ntawm 800 rau 800H txog 800HT sawv cev rau kev ua kom zoo dua rau kev nce kub, tshwj xeeb rau kev sib zog kub, txuas ntxiv ntawm kev ntxhov siab thaum muaj kev ntxhov siab.
Tus yuam sij sib txawv: Cov ntsiab lus carbon thiab grain qauv
Incoloy 800 (tsis yog N08800): Qhov no yog lub hauv paus alloy. It has a standard carbon content (0.06% max) and is typically supplied in a solution-annealed condition with a fine grain size. Nws muaj zoo dav dav corrosion thiab oxidation tsis kam tab sis muaj lub zog qis tshaj plaws ntawm peb.
Incoloy 800h (tsis yog N08810): "H" sawv rau "siab - kub." Nws muaj cov tswv yim muaj roj carbon ntau dua (0.05 - 0.10%). Cov khoom siv no yog daws-annealed ntawm qhov kub siab dua (feem ntau ib sab 4000℃f / 1150 degree), uas tau tshwm sim nyob rau hauv coarser grain loj (Astm 5 lossis coarser). Cov nplej coarse muab cov zog tshaj tawm hauv lub zog ntawm lub zog ntawm qhov kub siab tshaj 1100℃f (595 degree).
Incoloy 800ht (tsis yog N08811): Lub "HT" etts rau "siab - kub nrog titanium." Nws muaj tib cov pa roj carbon ntau li 800h tab sis nrog kev tswj zaum ntawm Al + TI cov ntsiab lus (0.85- 1.20%). Qhov kev piv txwv no yog qhov zoo rau kev ua tau zoo thiab siv tau zoo dua ntawm kev ntxiv dag zog (gamma prime) thaum lub sij hawm ntev ntev, muab lub zog loj tshaj plaws ntawm peb.
Cawv ntawm Welded Yeeb Nkab Xaiv:
Thaum hais kom meej welded yeeb nkab rau lub siab - Cov txheej txheem kub (piv txwv li, cua sov lub tubing, kho kom haum pigtails):
Rau kev tiv thaiv tshav kub kuj, 800 yuav ua rau txaus siab.
Rau kev thauj khoom ntawm chaw thau khoom kub (piv txwv li, 1200-1500 Qib F / 650-8 Welded yeeb nkab tau teev tseg, thiab cov zeb yuav tsum pov thawj cov kev kho mob thiab txhuv loj.
Rau qhov feem ntau xav tau kev nkag siab zoo thiab tsim qauv tsim nyog, 800HT yog xaiv lub neej, thiab cov zeb yuav tsum lees ob qho chemistry (al + ti) thiab cov noob loj.
Cov txheej txheem Weld rau 800H / HT yuav tsum muaj kev tsim nyog los xyuas kom cov weld sib koom ua kom muaj siab siab- cua sov.
5. Yuav ua li cas thaum lub sijhawm tsim khoom lag luam ntawm welded yeeb nkab rau cov alloys kom ntseeg tau kev ua haujlwm hauv kev ua kom huv si?
Tsim cov yeeb nkab txhim khu kev qha rau cov kev pabcuam corrosive yuav tsum tau muaj kev ua kom muaj teeb meem zoo (QA) raws txoj kev lees paub ntawm Weld Seam. "Haum {{- rau-}} Kev pabcuam" yog tau txheeb xyuas los ntawm cov ntawv yuav tsum tau ua.
1. Cov Khoom Siv Raw:
Lub kauj lossis phaj yuav tsum tau muaj pov thawj zeb ceeb toom ntawm cov chemistry thiab cov khoom ua raws li alloy (piv txwv li ittm b424 rau incoloy 825 phaj).
2. Tsis {- Kev sim tshuaj (ndt) ntawm Weld Seam:
Qhov no yog lub hauv paus ntawm QA rau Welded yeeb nkab.
100% Kev Ntsuas Hluav Taws Xob|Qhov no yog qhov yuav tsum tau ua qhov yuav tsum tau ua rau cov piping processing.
Automated Ultrasonic Kuaj (UT): Siv Siab Suab Nruag (xws li cov kab nrib pleb thiab tsis muaj kev sib tsoo) uas tuaj yeem nyuaj rau pom nrog RT. Nws yog qhov rhiab heev thiab feem ntau siv nyob rau hauv tandem nrog RT.
EDDY kev sim tam sim no (ect): feem ntau siv rau cov hlab me me txhawm rau ntes nto thiab ze {{} npoo npoo.
3. Ncej - Weld Kev Kho Cua Sov (PWHT):
Nyob ntawm cov alloy thiab kev pabcuam, ib qho kev zam tag nrho {}} Lub cev daws anal. Rau incoloy 825, qhov no yog ua tiav kom yaj ib theem cuam tshuam ntawm cov theem thiab rov ua dua Corrosion thiab Redore ntau xeb cuam tshuam hla tag nrho cov yeeb nkab, suav nrog lub haz.
4. Xeem Xeem thiab Ntawv Pov Thawj:
Hydrostatic Kuaj: Txhua qhov ntev ntawm cov yeeb nkab yog nias rau qib kev cai los ua pov thawj nws cov qauv kev ntseeg.
Kev ntsuam xyuas deg: Tus lej ID thiab OD yog kuaj xyuas cov kev tsis xws luag. Rau cov kev pabcuam corrosive, ib tug du, polished tiav yog feem ntau teev.
Daim ntawv pov thawj kawg: Cov yeeb nkab tsim teeb meem MTr qee cov kauj ruam, suav nrog cov ntaub ntawv qhia txog NDT thiab cov ntaub ntawv kho cua sov, muab tag nrho cov kev kho cua sov.
Ib tus neeg yuav yuav tsum hais cov kauj ruam no (piv txwv li, "Astm B775, welded incoloy 825, nrog 100% RT thiab tau txais ib qho khoom lag luam muaj peev xwm ua tau nyob hauv ib puag ncig corrosive.
