Hastelloy B-2 Phaj

Hastelloy B-2 Phajmuaj ob yam tseem ceeb. Nickel ntawm kwv yees li 65-70%, molybdenum ntawm 26-30%. Txhua yam yuav tsum tau khaws cia me me: carbon 0.02% max, silicon 0.10% max, hlau 2.0% max, chromium 0.7% max. Cov khub kawg yog cov ntsiab lus ntawm nplooj ntawv no, vim tias ob lub qab nthab tsis yog kev saib xyuas hauv tsev. Lawv yog cov alloy.

1. Chemistry, thiab vim li cas lub qab nthab zaum qhov twg lawv zaum

Element	ASTM B333 txwv (N10665)	Nws ua li cas
Ni	Qhov nyiaj tshuav (≈65–70%)	Matrix; muab cov tshuaj tiv thaiv chloride SCC thiab txo cov kua qaub
Mo	26.0–30.0	Cov khoom siv corrosion; drives tiv thaiv HCl thiab non-oxidizing acids
Fe	2.0 max	saum toj no, txhawb Ni₄Mo ( ) tsim ntawm cov ciam teb nplej
Cr	0.7 max	Cov me me nce tus nqi corrosion hauv kev txo cov kua qaub; cov nyiaj ntau dua hloov cov alloy tag nrho cov cim
C	0.02 max	Carbide nag lossis daus ntawm grain ciam teb
Si	0.10 max	Silicide tsim; kuj cuam tshuam rau weldability
Mn	1.0 max	Deoxidation residual
Cu	0.5 max	Cov seem

 

Yog vim li cas hlau thiab chromium capped yog metallurgical, thiab nws tsim nyog nkag siab ntau dua li nco. Nickel-molybdenum alloys nyob rau hauv 26-30% Mo ntau yog metastable. Yog hais tias cov hlau siv sij hawm nyob rau hauv qhov kub thiab txias band - kwv yees li 550 mus rau 850℃- molybdenum thiab npib tsib xee ua ke rau hauv ib qho kev txiav txim intermetallic, Ni₄Mo, uas tsim raws li ib tug grain-txheej network.

 

Thaum lub network ntawd tshwm sim, cov hlau yuav nkig thiab cov ciam teb ua txoj hauv kev corrosion. Hlau thiab chromium ob leeg txo tus tsav tsheb rau qhov kev txiav txim; ua kom lawv qis nce qhov thaiv. Tias yog vim li cas B-2 tus specification nyeem raws li ib daim ntawv teev cov ceilings es tsis yog ib daim ntawv teev ntxiv.

 

Qhov tshwm sim rau tus neeg yuav khoom yog tias B-2 tsis yog qib koj tuaj yeem vuam thiab txo kev ntxhov siab. Kev kho kev ntxhov siab yuav ua haujlwm nyob rau hauv qhov chaw ntawm 600-700℃- qhov tseeb hauv lub qhov rais uas ua rau Ni₄Mo. Lo lus teb raug tsis yog "kev ntxhov siab-relieve ua tib zoo." Nws yog "tsis txhob ntxhov siab-relieve." B-2 phaj yog muab cov tshuaj annealed thiab yuav tsum nyob twj ywm li ntawd, thiab raws li-welded mob yog npaj rau kev pab cuam.

 

Tus neeg tsim khoom siv cov txheej txheem kev kho cua sov tom qab vuam rau lub plhaub B-2 vim tias txoj haujlwm WPS tus qauv hais tias tau ua kom lub phaj puas lawm, thiab qhov tsis ua haujlwm yuav tsis tshwm sim txog thaum lub nkoj nyob hauv cov kua qaub.

 

2. Thickness Range thiab Dab tsi Txhua Band Yog Rau

B-2 phaj yog ib txwm muab los ntawm 0.5 hli mus rau 100 hli, nrog 6 hli thiab 8 hli nqa hauv Tshuag los ntawm cov neeg xa khoom feem ntau vim cov no yog cov ntsuas uas nkag mus rau hauv ob sab phlu thiab cov hlab ntsha me.

 

Thickness band	Yam khoom txoj kev	Qhov xwm txheej	Sau ntawv
0.5-2.0 hli	Cov ntawv txias txias	Tshuaj annealed, mos	Rau hauv ob sab phlu, gaskets, spacer phaj; sib sib zog nqus ua tau
2.0-6.0 hli	Cold dov los yog kub dov ntawv	Cov tshuaj annealed, pickled	Cov hlab ntsha me me, cov plhaub me me; cov khoom ntsuas
6.0-25 hli	Kub dov phaj	Cov tshuaj annealed, pickled, descaled	Fabricated Cheebtsam, raj ntawv, flanges txiav los ntawm phaj
25-50 hli	Kub dov phaj	Tshuaj annealed	Yuav tsum tau zeb kev pom zoo ntawm cov khoom nruab nrab
50-100 hli	Kub dov phaj, zeb txiav txim	Tshuaj annealed	Tsis Tshuag; annealing uniformity yog cov lus nug los nug txog

 

Txheem phaj qhov ntau thiab tsawg khiav mus rau 1000-1219 mm dav thiab 2000-6000 mm ntev, nrog txiav-rau-loj thiab ntug bevelling muaj. Qhov dav siab tshaj 1500 hli feem ntau yog cov khoom lag luam txiav txim ntau dua li cov khoom lag luam.

 

Tolerances ua raws li cov kev cai dav dav ntawm lub tiaj-dov nickel-alloy specification es tsis yog lub zeb lub tsev qauv, thiab rau B-2 lo lus nug kam rau siab yog me ntsis txawv ntawm stainless. Thickness kam rau ua yog qhov ua siab ntev uas koj yuav tsum tau nyeem ua ntej: lub phaj tuab dhau yog pub dawb 9.22 kg ib square meter ib millimeter ntawm qhov hnyav ntxiv, thiab cov phaj tuab hauv qab uas tseem nyob rau hauv kev ua siab ntev tuaj yeem tawm hauv ob sab phlu dhau ntawm tus qauv tsim. Ob leeg ua raws li txoj cai. Tsuas yog ib qho yog qhov koj tsim.

 

Dimension	Yuav qhia li cas	Vim li cas nws tseem ceeb ntawm B-2 tshwj xeeb
Thickness	Nominal, lossis yam tsawg kawg nkaus, lossis nruab nrab - xaiv ib qho thiab sau nws	Qhov kev txiav txim nominal-with-negative-tolerance tuaj yeem tuaj txog ntawm qhov kawg ntawm txhua lub phaj
Dav / ntev	Qhov tseeb qhov ntev, tsis yog nominal + trim nyiaj	B-2 phaj feem ntau txiav los ntawm Tshuag; thaj chaw siv tau txawv ntawm qhov chaw txiav txim
Flatness	Qhia qhov txwv hauv mm rau ib 'meter'	Waviness ntawm lub phaj thicker qhia tau hais tias nyob rau hauv ob sab yog haum rau lub plhaub
Ntug mob	Sheared, plasma txiav, los yog machined	Sheared npoo ntawm B-2 xav tau kev tshem tawm burr; burrs yog tawg pib qhov chaw nyob rau hauv no alloy
Nto	Pickled thiab descaled, los yog raws li-dov	Scale tshuav ntawm qhov chaw ntxiab cov kab mob uas tom qab dhau los ua qhov chaw corrosion
Kos npe	Thaum tshav kub kub tooj ntawm txhua phaj, pauv mus rau txhua qhov txiav	Mixed-heat bundles yog cov feem ntau traceability tsis ua hauj lwm

 

Cov kab kawg no tsis yog ntaub ntawv pedantry. B-2 yog teev los ntawm chemistry, thiab chemistry yog ib lub tshav kub. Yog hais tias lub phaj 1 m × 2 m raug txiav rau hauv 6 lub hauv ob sab phlu thiab tsuas yog cov niam txiv phaj nqa cov cua sov, koj muaj rau 6 daim ntawm cov hlau uas tsis muaj cov qauv qhia. Nug rau txoj kev hloov pauv ua ntej lub phaj txiav, tsis yog tom qab.

 

Lub thickness taw tes uas tseem ceeb tshaj li lwm yam: kev daws annealing ntawm 1065-1080℃ua raws li dej quench tsis xaiv, thiab cov dej quench yog qhov tuab phaj tau nyuaj. Cua txias tsis yog qhov hloov pauv. Maj mam txias los ntawm 850-550℃yog raws nraim li cas koj precipitate theem uas tsis muaj hlau chemistry tau tsim los tiv thaiv.

 

Ntawm daim ntawv 6 hli, dej quench ua kom tag nrho cov seem hauv qab ib pliag. Ntawm lub phaj 60 hli, qhov chaw tseem tab tom tso cua sov ntev tom qab qhov chaw tau ruaj khov, thiab tsis muaj qhov hloov pauv ntawm lub tank. Yog tias koj xav tau hnyav B-2 phaj, nug lub zeb seb qhov chaw nruab nrab ntawm qhov cua txias zoo li cas thiab seb lub pob zeb puas tau ua tiav nrog lub phaj ntawm tus kheej los yog hauv ib pawg.

 

3. Mechanical Properties: Tus lej twg yog qhov tiag

Ntawm no yog cov lus teb rau qhov qhib puzzle. ASTM B333 qhia txog yam tsawg kawg nkaus rau cov tshuaj tov-annealed phaj. Cov khoom sib txawv thiab cov ntawv luam tawm tau tsim cov ntawv luam tawm sib txawv, thiab cov nplooj ntawv luam tawm sib xyaw ua ke thiab qhov tsawg kawg nkaus yam tsis tau hais tias qhov twg yog qhov twg.

 

Khoom	Yam tsawg kawg nkaus B333	Yam khoom muaj nqis	Qhov twg tsis meej pem los ntawm
Lub zog tensile	690 MPa (100 ksi)	760-880 MPa	Qee nplooj ntawv hais txog tus lej siab dua li qhov tsawg kawg nkaus
Yield zog, 0.2%	283-350 MPa (41-51 ksi)	310-400 MPa	Qhov dav tshaj plaws ntawm txhua tus nqi hauv qib no
Elongation hauv 50 mm	40%	50–60%	Kev ntseeg siab thoob plaws cov neeg xa khoom
Hardness	- (tsis teev raws li min)	90–100 IB	Qee nplooj ntawv hais HB, qee qhov HRB
Qhov ntom	9.22 g / cm³	-	Zoo ib yam
Melting ntau	1330-1380 degree	-	Zoo ib yam

 

Rau kev tsim qauv, siv cov cai tso cai rau kev ntxhov siab los ntawm ASME Tshooj II Ntu D, tsis yog tus neeg muag khoom tus nqi raug. Rau kev yuav khoom pov thawj, nug seb daim duab ntawm daim ntawv pov thawj yog qhov tshwj xeeb yam tsawg kawg nkaus thiab qhov twg yog qhov ntsuas tau - daim ntawv pov thawj uas qhia 350 MPa tawm los qhia koj cov cua sov dhau, tab sis qhia koj tsis muaj dab tsi txog qhov tsawg kawg nkaus nws tau sim tawm tsam.

 

Daim duab ntom ntom yog tsim nyog nco ntsoov rau qhov sib txawv. Ntawm 9.22 g / cm³, B-2 phaj yog li 15% hnyav dua 316L rau tib lub ntim. A 1000 × 2000 hli phaj ntawm 6 hli hnyav txog 111 kg; tib lub phaj hauv 316L hnyav txog 95 kg. Qhov ntawd tshwm sim hauv kev tuav, hauv kev thauj khoom thiab hauv kev txhawb nqa steel.

 

4. Qhov twg B-2 Phaj ua haujlwm, thiab qhov twg nws nres

B-2 lub koob npe nrov nyob ntawm ib tus cwj pwm: nyob rau hauv oxygen-dawb hydrochloric acid nws yog resistant nyob rau hauv tag nrho cov concentration ntau, mus txog rau boiling. Nyob rau hauv deaerated HCl, corrosion tus nqi nyob rau hauv sub-0.1 mm / xyoo ntau nyob rau hauv cov concentrations uas 316L yuav noj. Qhov ntawd yog qhov muaj peev xwm engineering tiag tiag, tsis yog kev lag luam thov.

 

Dab tsi ntawm cov nplooj ntawv luam tawm hauv qab yog qhov nqaim npaum li cas qhov kev tsim nyog yog.

• Dissolved oxygen.Aerated HCl nce tus nqi corrosion los ntawm kev txiav txim ntawm qhov loj. Cov hlau tsis yog "zoo me ntsis" nrog oxygen tam sim no; nws nres ua ib daim ntawv thov B-2.
• Ferric thiab cupric ions.Cov no yog cov oxidizers xa los ua cov kab mob. Cov kwj deg hydrochloric acid uas tau kov cov pa roj carbon hlau ntws tam sim no muaj Fe³⁺, thiab cov kwj dej ntawd yuav tawm tsam B-2. Tib yam siv rau tooj liab-alloy li qub los yog lub twj tso kua mis luas nyob txhua qhov chaw ntws. Qhov no yog tib txoj kev uas feem ntau B-2 kev teeb tsa tsis ua haujlwm: cov hlau tsis raug thiab cov kav dej ntws ntawm nws tsis yog.
• Nitric acid, ntub chlorine, hypochlorites, chlorates.Oxidizing los ntawm xwm; tsis yog B-2 kev pabcuam ntawm ib qho kev xav.
• Seawater thiab chloride pitting ib puag ncig.B-2 yog ib qho kev txo cov kua qaub, tsis yog chloride alloy. Chromium yog capped ntawm 0.7%; tsis muaj ib zaj movie hais txog. Rau chloride pitting thiab crevice kev pabcuam, tsev neeg molybdenum-chromium yog cov lus teb, tsis yog qhov no.

 

Rau B-3: nws muaj tseeb vim tias B-2 cov hlau tsis tshua muaj thiab chromium ua rau nws nyuaj rau kev ua haujlwm kub. B-3 so cov qab nthab kom yuav fabricability. Yog tias koj tab tom tsim cov phaj tuab rau hauv cov duab sib dhos thiab tsoo tawg, B-3 yog kev sib tham. Yog tias koj qhov kev pabcuam yog HCl tsis muaj oxygen tiag tiag thiab koj tab tom yuav lub phaj tiaj tus rau kab lossis yob, B-2 txoj kev nruj dua yog qhov zoo dua thawj koom ruam.

 

Muaj ib tug ciam teb ntxiv uas cov neeg muag khoom tsis tshua tau sau ntawv, thiab nws yog ib qho uas txiav txim siab seb qhov project B-2 phaj ua tiav: qhov kev ua tau zoo ntawm cov hlau yog nyob ntawm tag nrho cov Circuit Court, tsis yog ntawm cov phaj. Lub phaj uas muaj tseeb nyob rau hauv kev sib cais tseem tuaj yeem ua tsis tiav vim tias lub cev carbon-steel twj tso kua mis, lub rooj zaum tooj liab-alloy valve, los yog lub tank qhib tau qhia cov pa oxygen lossis metallic ions ntws.

 

Thaum qhov ntawd tshwm sim, cov khoom raug liam thiab cov hlau tau txais lub koob npe nrov rau qhov tsis sib xws. Nws tsis yog inconsistent. Nws yog intolerant ntawm ib qho mob tshwj xeeb, thiab qhov mob feem ntau yog tsim sab nraum lub phaj.

 

5. Kev txiav txim cov ntaub ntawv rau European thiab Middle East Buyers

Rau ib tus neeg yuav khoom hauv Rotterdam lossis Antwerp khiav cov khoom siv tshuaj lom neeg lossis kev ua haujlwm hauv lub tank, qhov kev sib tham tshwj xeeb feem ntau yog los ntawm ob yam: seb lub phaj puas tuaj yeem raug lees paub rau EN 10204 3.1 nrog cov xov tooj cua kub traceable rau lub phaj nws tus kheej (tsis yog rau cov pob), thiab seb cov khoom txiav-rau-loj puas nqa tib lub sijhawm ntsuas kub tom qab txiav. B-2 phaj yog kub-rhiab txaus txaus uas cov khoom sib xyaw ua ke yog qhov txaus ntshai tiag tiag, tsis yog cov ntaub ntawv.

 

Standard mov yog tov annealed, pickled thiab descaled, nrog EN 10204 3.1 zeb daim ntawv pov thawj raws li lub hauv paus thiab 3.2 muaj nyob rau ntawm kev thov. Filler metal for welding is ERNiMo-7 (AWS A5.14) for GTAW, or ENiMo-7 covered electrodes; cov npe ERNiMo-2 laus dua tshwm sim ntawm qee cov ntaub ntawv xa khoom hauv Suav thiab tsis yog AWS tam sim no. Hauv paus shielding nrog argon yog yuav tsum tau - ib tug oxidised paus poob nws tsis kam mus HCl nkaus.

 

 

 

Cim npe nrov: UNS N10665, ASTM B333, npib tsib xee-molybdenum phaj, Ni₄Mo beta theem, tshuaj annealed phaj, hydrochloric acid kuj, ERNiMo-7 muab tub lim, thickness kam rau ua