1. Hastelloy UNS N10675 yog dab tsi, thiab nws muaj pes tsawg leeg txawv ntawm lwm cov nickel- molybdenum alloys li cas?
Hastelloy UNS N10675 yog npib tsib xee- molybdenum alloy nrog cov pa roj carbon tsawg thiab silicon cov ntsiab lus, tsim kom muaj kev tiv thaiv tshwj xeeb los txo cov kua qaub, tshwj xeeb tshaj yog hydrochloric acid ntawm txhua qhov siab thiab kub. Nws yog feem ntau paub los ntawm lub npe lag luam Hastelloy B-3 thiab sawv cev rau kev hloov pauv ntawm B-2 alloy ua ntej nrog kev txhim kho thermal stability thiab fabricability.
Tshuaj muaj pes tsawg leeg (A ASTM B335):
| Element | Qhov hnyav% |
|---|---|
| Nickel (Ni) | Qhov nyiaj tshuav (65% min) |
| Molybdenum (hli) | 27.0 - 32.0 |
| Hlau (Fe) | 1.0 - 3.0 |
| Chromium (Cr) | 1.0 - 3.0 |
| Cobalt (zeeg) | Tsawg dua los yog sib npaug rau 3.0 |
| Tungsten (W) | Tsawg dua los yog sib npaug rau 3.0 |
| Manganese (Mn) | Tsawg dua los yog sib npaug rau 3.0 |
| Aluminium (Al) | Tsawg dua los yog sib npaug li 0.50 |
| Titanium (Ti) | Tsawg dua los yog sib npaug li 0.20 |
| Zirconium (Zr) | Tsawg dua lossis sib npaug li 0.10 |
| Cov pa roj carbon (C) | Tsawg dua los yog sib npaug li 0.01 |
| Silicon (Si) | Tsawg dua lossis sib npaug li 0.10 |
Sib piv rau Lwm cov Nickel{0}}Molybdenum Alloys:
| Alloy | UNS | Mo% | Cr% | Fe% | C % | Si% | Cov yam ntxwv tseem ceeb |
|---|---|---|---|---|---|---|---|
| B-3 | N10675 | 27-32 | 1-3 | 1-3 | Tsawg dua los yog sib npaug li 0.01 | Tsawg dua lossis sib npaug li 0.10 | Txhim kho thermal stability, zoo dua fabricability |
| B-2 | N10665 | 26-30 | Tsawg dua los yog sib npaug rau 1.0 | Tsawg dua los yog sib npaug rau 2.0 | Tsawg dua lossis sib npaug li 0.02 | Tsawg dua lossis sib npaug li 0.10 | Original B alloy; susceptible rau theem intermetallic |
| B-4 | N10629 | 26-30 | 1-1.5 | 3-6 | Tsawg dua los yog sib npaug li 0.01 | Tsawg dua los yog sib npaug li 0.05 | Hloov kho kom zoo dua thermal stability |
Cov yam ntxwv tseem ceeb ntawm N10675 (B-3):
High Molybdenum (27-32%):
Muab qhov tshwj xeeb tiv thaiv kom tsis txhob muaj cov kua qaub, tshwj xeeb tshaj yog hydrochloric acid (HCl) ntawm tag nrho cov concentrations txog rau boiling.
Tsim cov yeeb yaj kiab tiv thaiv ntawm molybdenum oxides thiab ntsev uas ruaj khov hauv kev txo qis ib puag ncig.
Qhov tseem ceeb contributor rau corrosion kuj nyob rau hauv uas tsis yog -oxidizing acids.
Ultra-Cov pa roj carbon tsawg (tsawg dua lossis sib npaug rau 0.01%):
Minimizes carbide nag lossis daus thaum vuam thiab thermal raug.
Qhov tseem ceeb rau kev tswj xyuas qhov sib txawv corrosion kuj nyob rau hauv raws li -welded mob.
Ultra-Low Silicon (tsawg dua lossis sib npaug rau 0.10%):
Txo qhov tsim ntawm intermetallic theem (Ni-Mo xaj theem) uas tuaj yeem embrittle cov hlau.
Txhim kho thermal stability thaum vuam thiab fabrication.
Tswj Chromium (1-3%):
Muab kev txwv tsis pub rau oxidizing hom yam tsis muaj kev cuam tshuam cov alloy qhov kev ua tau zoo hauv kev txo cov kua qaub.
Cov qib tswj tau zam qhov tsim ntawm cov theem kev puas tsuaj thaum muab qee qhov kev zam rau me oxidizers.
Hlau (1-3%) thiab Lwm Yam Khoom:
Muab cov tshuaj tiv thaiv kom muaj zog.
Manganese, txhuas, titanium, thiab zirconium ua raws li deoxidizers thiab grain refiners.
Yuav Ua Li Cas N10675 Txhim Kho ntawm B-2:
Tus thawj Hastelloy B-2 tau raug tsim los ntawm cov theem sib txawv (Ni-Mo xaj theem) thaum raug kub nyob rau hauv thaj tsam ntawm 1200℃F-1600℃F (650℃-870 degree) thaum vuam lossis kho cua sov. Cov theem no ua rau embrittlement thiab txo corrosion kuj. N10675 (B-3) tau tsim nrog:
Tsawg silicon (tsawg dua los yog sib npaug rau 0.10% vs. Tsawg dua los yog sib npaug rau 0.10% zoo sib xws, tab sis kev tswj nruj dua).
Tswj chromium (1-3% vs. Tsawg dua lossis sib npaug li 1.0%).
Optimized sib npaug ntawm cov ntsiab lus kom qeeb lub kinetics ntawm theem nag lossis daus.
Qhov kev txhim kho thermal stability no txhais tau hais tias N10675 muaj qhov dav "qhov rais" thiab muaj kev zam txim ntau dua thaum lub sij hawm vuam thiab kev kho cua sov, ua rau nws nyiam tshaj B-2 rau feem ntau cov ntawv thov.
2. Dab tsi yog cov ntawv thov tseem ceeb rau Hastelloy N10675 alloy tuav hauv kev lag luam tshuaj thiab tshuaj?
Hastelloy N10675 alloy tuav tau teev tseg rau cov ntawv thov tshwj xeeb rau kev txo cov kua qaub, tshwj xeeb yog hydrochloric acid. Daim ntawv bar feem ntau yog machined rau hauv cov khoom uas yuav tsum tau tiv taus qhov hnyav tshaj plaws corrosive ib puag ncig thaum tuav txhua yam kev ncaj ncees.
Kev Siv Tshuaj Siv Tshuaj:
Hydrochloric Acid (HCl) Kev Pabcuam:
Muaj nuj nqi: Cov khoom xyaw hauv HCl ntau lawm, tuav, thiab khaws cia.
Vim li cas N10675 Bars: Tsis sib haum xeeb tiv thaiv HCl ntawm tag nrho cov concentrations thiab kub txog rau boiling. Siv rau:
Valve Cheebtsam: Stems, pob, rooj zaum, thiab lub cev rau HCl kev pabcuam li qub.
Pump Shafts thiab Impellers: Rau cov twj centrifugal circulating HCl.
Kev ntsuas: Thermowells, sensor vaj tse, orifice daim hlau.
Sulfuric Acid (H₂SO₄) Kev Pabcuam:
Muaj nuj nqi: Cheebtsam hauv sulfuric acid cov nroj tsuag thiab tuav cov tshuab.
Vim li cas N10675 Bars: Kev tiv thaiv zoo rau sulfuric acid hauv kev txo qis (txog 60%) ntawm qhov kub nruab nrab.
Cov khoom xyaw nquag: Agitator shafts, valve stems, fasteners.
Acetic Acid thiab Organic Acid Service:
Muaj nuj nqi: Cov khoom xyaw hauv acetic acid ntau lawm thiab tuav.
Vim li cas N10675 Bars: Kev tiv thaiv zoo rau tag nrho cov ntsiab lus ntawm acetic acid, txawm tias thaum boiling.
Cov Cheebtsam: Twj shafts, tov khoom hniav, valve Cheebtsam.
Phosphoric Acid (H₃PO₄) Kev Pabcuam:
Muaj nuj nqi: Cov khoom xyaw hauv phosphoric acid ntau lawm (qhov twg tsis muaj fluorides).
Vim li cas N10675 Bars: Zoo tiv taus cov ntshiab phosphoric acid; rau cov kua qaub tsis huv (nrog cov tshuaj fluorides), G-30 yuav nyiam dua.
Pharmaceutical Industry Applications:
API Synthesis Reactors:
Function: Agitator shafts, baffles, thiab instrumentation in reactors for active pharmaceutical ingredient (API) synthesis.
Vim li cas N10675 Bars: Tiv thaiv cov hlau tsis huv ntawm cov khoom lag luam rhiab heev; resists txhoj puab heev reagents thiab ntxuav tus neeg sawv cev.
High -Purity Water Systems:
Muaj nuj nqi: Cov khoom xyaw hauv dej rau kev txhaj tshuaj (WFI) cov tshuab thiab cov cuab yeej ua kom huv.
Vim li cas N10675 Bars: Tiv thaiv corrosion los ntawm siab - dej huv thiab tshuaj tua kab mob; smooth machined nto tiv thaiv kab mob adhesion.
Cov khoom siv chromatography:
Muaj nuj nqi: Precision Cheebtsam hauv kev npaj chromatography systems.
Vim li cas N10675 Bars: Inert rau mobile theem; machined kom meej tolerances rau sealing nto.
Lwm yam kev siv:
| Kev lag luam | Daim ntawv thov | Cheebtsam Machined los ntawm Bar |
|---|---|---|
| Nuclear Roj Processing | Dissolver Cheebtsam | Agitator shafts, fasteners (qhov twg HCl tam sim no) |
| Hlau Refining | Acid leaching khoom | Pump shafts, valve stems |
| Kev kho khib nyiab | Acid neutralization systems | Valve Cheebtsam, agitators |
| Tshuaj Tankers | Cargo twj thiab li qub | Shafts, impellers, seals |
| Pulp thiab ntawv | Bleach cog khoom siv | Mixer shafts, fasteners |
Yam Cheebtsam Machined los ntawm N10675 Bars:
| Cheebtsam | Bar Form | Machining kev ua haujlwm |
|---|---|---|
| Pump Shafts | Round bar | Tig, sib tsoo, keyway txiav |
| Valve Stems | Hloov los yog hex bar | Tig, threading, sib tsoo |
| Valve Pob | Round bar | Tig, milling, sib tsoo, lapping |
| Fasteners | Hex los yog round bar | Xov dov / txiav, taub hau |
| Thermowells | Round bar | Drilling (qhov tob), tig, threading |
| Agitator Ncej | Round bar | Tig, keyway txiav |
| Flanges | Round bar | Tig, drilling, tig |
| Ntaus Fittings | Me me txoj kab uas hla | Precision tig, threading |
Case Study: Hydrochloric Acid Valve Cheebtsam
Ib tsob nroj tshuaj uas tsim HCl tau ntsib kev ua tsis tiav ntawm cov hlau B-2 lub valve stems hauv 32% HCl kev pabcuam ntawm 180℃F. Kev ua tsis tiav tau tshwm sim vim kev ntxhov siab corrosion tawg ntawm cov xov hauv paus tom qab 6-12 lub hlis. Hloov stems machined los ntawm Hastelloy N10675 puag ncig bar ncua kev pab cuam lub neej tshaj 4 xyoo, tsis muaj pov thawj ntawm cracking los yog tseem ceeb corrosion. Kev txhim kho thermal stability ntawm N10675 tshem tawm txoj kev pheej hmoo ntawm embrittlement thaum lub sij hawm xov dov, thiab cov hlau zoo tshaj rau chloride kev nyuaj siab corrosion cracking kom ntseeg tau mus ntev.
3. Dab tsi machining yam ntxwv yog tshwj xeeb rau Hastelloy N10675 alloy tuav, thiab yuav ua li cas lub khw yuav optimize tsis tau rau kev vam meej khoom?
Machining Hastelloy N10675 alloy bars nthuav tawm cov kev sib tw zoo ib yam li lwm cov nickel-molybdenum alloys, tab sis nws cov chemistry optimized thiab thermal stability yeej txhim kho machinability piv rau yav dhau los B-2 alloys. Kev nkag siab txog cov yam ntxwv no yog qhov tseem ceeb rau kev tsim khoom zoo.
Kev txiav txim siab txog kev coj tus cwj pwm:
Siab zog:
Annealed tensile zog: 110 ksi (760 MPa) yam tsawg kawg nkaus.
Yuav tsum muaj kev txiav ntau dua thiab kev teeb tsa nruj.
Ua Haujlwm Hardening:
Ua hauj lwm hardens sai heev thaum machining.
Thaum ua hauj lwm hardened, nto ua abrasive thiab nyuaj rau txiav.
Qhov cuam tshuam: Yuav tsum txiav hauv qab ua haujlwm- txheej tawv tawv; zam lub teeb txiav uas rub.
Tsawg Thermal conductivity:
Thaum tshav kub kub generated ntawm tej cheeb tsam nyob twj ywm concentrated.
Ua rau cov cuab yeej siab kub, ua kom cov cuab yeej siv nrawm nrawm.
Qhov cuam tshuam: Yuav tsum tau ua kom txias thiab cua sov- cov ntaub ntawv tiv taus.
Gummy Chips:
Ua kom tawv, stringy chips uas tuaj yeem qhwv ib ncig ntawm lub cuab yeej thiab workpiece.
Qhov cuam tshuam: Yuav tsum tau chip breakers thiab nti tswj cov tswv yim.
Ua -Up Edge (BUE):
Cov khoom siv tuaj yeem welding rau kev txiav ntug, cuam tshuam kev ua tiav thiab lub neej cuab yeej.
Qhov cuam tshuam: Cov cuab yeej ntse, nrawm nrawm / pub, thiab cov khoom ua kom txias yog qhov tseem ceeb.
Kev txhim kho tshaj B-2:
N10675 muaj me ntsis machinability zoo dua B-2 vim muaj kev ruaj khov microstructure.
Txo kev nyiam rau intergranular tawg thaum lub sij hawm threading thiab ua hauj lwm txias heev.
Kev zam txim ntau ntawm cov kev hloov pauv parameter.
Optimization Strategies:
Kev xaiv cuab yeej:
| Kev ua haujlwm | Pom zoo cov cuab yeej siv | Geometry |
|---|---|---|
| Tig (rough) | Carbide (C-2 qib), coated (TiAlN / AlTiN) | Positive rake, ntse ntug |
| Tig (tiav) | Carbide, CBN rau nyuaj- tig | Wiper inserts rau kev ua tiav |
| Milling | Carbide, siab - feed cutters | Zoo geometry |
| Drilling | Carbide, cobalt HSS rau qhov me me | Split point, coolant los ntawm |
| Tapping | Daim ntawv kais nyiam tshaj qhov txiav kais dej | Tshwj xeeb geometry rau nickel alloys |
| Xov | Xov milling lossis ib zaug -point | Tag nrho profile inserts |
Txiav Parameters:
| Kev ua haujlwm | Ceev (SFM) | Pub (IPR) | Qhov tob ntawm Txiav |
|---|---|---|---|
| Tig (rough) | 40-70 | 0.010-0.018 | 0.050-0.150" |
| Tig (tiav) | 50-80 | 0.003-0.008 | 0.010-0.030" |
| Milling | 40-70 | 0.002-0.005 PIB | 0.020-0.100" |
| Drilling | 20-35 | 0.001-0.004 PAB | Peck lub voj voog |
| Tapping (form) | 10-15 | Matches xov suab | N/A |
Coolant thiab Lubrication:
Dej nyab qhov tseem ceeb; siab -siab los ntawm- lub cuab tam nyiam.
Siv dej- cov kua dej ua kua dej nrog EP additives (siab heev).
Rau tapping thiab threading, xav txog tshwj xeeb tapping compounds (chlorinated los yog sulfurized roj).
Ua kom tiav cov dej txias kom tswj tau cov cua sov thiab dej ntws tawm.
Toolpath Strategies:
Tswj kev koom tes tas li (trochoidal milling, adaptive clearing).
Tsis txhob nyob hauv tsev lossis rub txhua lub sijhawm.
Climb milling nyiam los txo cov haujlwm hardening.
Siv tev milling rau qhov sib sib zog nqus los tswj cov nti khiav tawm.
Kev ua haujlwm:
Rigid teeb tseem ceeb los tiv thaiv kev vibration.
Siv hydraulic lossis mechanical chucks nrog kev tuav kom zoo.
Txhawb nqa ntev ntev nrog cov chaw so ruaj khov lossis cov chaw tailstock.
Minimize overhang kom txo chatter.
Surface Finish Considerations:
| Kev xav tau | Tswv yim |
|---|---|
| Txheem machining (63-125 Ra) | Kev pub / nrawm, cov cuab yeej ntse |
| Precision tiav (16-32 Ra) | Wiper inserts, tiav dhau, txo pub |
| Ultra{0}}zoo (8-16 Ra) | Sib tsoo los yog polishing tom qab machining |
| Xov | Xov milling lossis ib qho - taw tes nrog ntau lub teeb hla |
Common Challenges thiab Solutions:
| Kev sib tw | Kev daws |
|---|---|
| Cov cuab yeej siv ceev ceev | Txo ceev, txhim kho cua txias, siv coated carbides |
| Qhov chaw tsis zoo | Ua kom ceev, txo cov khoom noj, cov cuab yeej ntse |
| Chip tswj | Chip breaker inserts, siab -pressure coolant |
| Ua hauj lwm hardening | Tswj nruj nruj pub, zam kev txiav lub teeb |
| Ua - nce ntug | Ua kom ceev, txhim kho lubrication |
| Kev vibration / sib tham | Nce rigidity, txo overhang, sib txawv ceev |
| Dimensional variation | Tswj cov cua sov ua kom sov, cia txias - cia nruab nrab ntawm kev hla |
Machining Sequence rau Cov Khoom Tseem Ceeb:
Roughing: Tshem tawm cov khoom loj nrog cov khoom hnyav, tawm ntawm 0.020-0.040 "rau kev ua tiav.
Kev ntxhov siab (xaiv tau): Rau cov khoom muaj tseeb, xav txog kev ntxhov siab rau kev ntxhov siab tom qab roughing los so kom txaus siab (1600℃F-1800℃F, qeeb txias).
Semi-Tiav: Tshuab mus rau hauv 0.005-0.010" ntawm qhov ntev kawg.
Finish: Thaum kawg txiav nrog lub teeb txau thiab cov cuab yeej ntse kom pom qhov tseeb thiab qhov chaw tiav.
Threading / Sib Tsoo: Cov haujlwm kawg nrog cov txheej txheem tsim nyog.
4. Cov kev tswj kom zoo thiab ntawv pov thawj dab tsi siv rau Hastelloy N10675 alloy bars rau cov ntawv thov tseem ceeb?
Hastelloy N10675 alloy tuav rau kev siv tshuaj lom neeg tseem ceeb yuav tsum muaj kev tswj xyuas kom zoo thiab ua tiav daim ntawv pov thawj los xyuas kom meej cov khoom siv, kev tiv thaiv corrosion, thiab kev cia siab ntev -. Cov kev cai no feem ntau tshaj cov qauv ASTM specifications.
Tswj Specifications:
| Txuj | Title | Daim ntawv thov |
|---|---|---|
| ASTM B 335 Cov Lus Qhia Tshwj Xeeb | Nickel{0}}Molybdenum Alloy Qws, Bar, thiab Hlau | Cov khoom tseem ceeb specification |
| ASTM B880 Cov Lus Qhia Tshwj Xeeb | General Requirements rau Nickel Alloy Qws, Bar, thiab Hlau | Cov kev xav tau ntxiv |
| ASME Section II, Part B | SIB-335 | ASME Boiler & Pressure Vessel Code version |
| Cov neeg siv khoom -Tshwj xeeb | Ntau yam | Feem ntau nruj dua |
Cov ntaub ntawv pov thawj yuav tsum muaj:
Mill Test Report (MTR):
Certified tshuaj ntsuam xyuas ib lub tshav kub.
Kev txheeb xyuas cov cuab yeej cuab tam (tensile, yield, elongation).
Cov ntawv pov thawj kev kho cua sov (kub, sijhawm, quench method).
Traceability los ntawm yaj mus rau tiav bar.
Thaum tshav kub kub Traceability:
Txhua bar cim nrog tus lej kub.
Daim ntawv qhia ntawm cov tuav rau cov cua sov tshwj xeeb khaws cia.
Positive Material Identification (PMI):
Feem ntau xav tau rau cov ntawv thov tseem ceeb.
Txheeb xyuas qib ntawm txhua qhov bar (100% kev soj ntsuam ntau).
X-ray fluorescence (XRF) lossis optical emission spectroscopy (OES).
Chemical Composition Verification (ASTM B335):
| Element | Kev xav tau (%) |
|---|---|
| Nickel | Qhov nyiaj tshuav (65% min) |
| Molybdenum | 27.0 - 32.0 |
| Hlau | 1.0 - 3.0 |
| Chromium | 1.0 - 3.0 |
| Cobalt | Tsawg dua los yog sib npaug rau 3.0 |
| Tungsten | Tsawg dua los yog sib npaug rau 3.0 |
| Manganese | Tsawg dua los yog sib npaug rau 3.0 |
| Aluminium | Tsawg dua los yog sib npaug li 0.50 |
| Titanium | Tsawg dua los yog sib npaug li 0.20 |
| Zirconium | Tsawg dua lossis sib npaug li 0.10 |
| Cov pa roj carbon | Tsawg dua los yog sib npaug li 0.01 |
| Silicon | Tsawg dua lossis sib npaug li 0.10 |
Mechanical Property Verification (ASTM B335):
| Khoom | Chav ntsuas kub xav tau |
|---|---|
| Tensile zog | 110 ksi (760 MPa) yam tsawg kawg nkaus |
| Yield zog (0.2% offset) | 51 ksi (350 MPa) yam tsawg kawg nkaus |
| Elongation | 40% yam tsawg kawg nkaus |
Tsis yog -Kev Tshawb Fawb Kev Ua Phem (NDE):
| Txoj kev | Daim ntawv thov | Lub Hom Phiaj |
|---|---|---|
| Kev kuaj ultrasonic (UT) | Loj diameters, kev siv tseem ceeb | Inclusions, voids, tawg |
| Eddy Current Testing (ET) | Cov kab me me, kev tshuaj xyuas saum npoo | Nto seams, laps, tawg |
| Cov kua dej Penetrant (PT) | Bar xaus, xav tias thaj chaw | Nto tawg, laps |
| Visual Examination (VT) | 100% ntawm bar nto | Surface defects, finish quality |
Dimensional soj ntsuam:
| Parameter | Kev kam rau siab (rau ASTM B335) | Kev ntsuas ntsuas |
|---|---|---|
| Txoj kab uas hla (round) | +0.000", -0.005" rau -0.020" (nyob ntawm qhov loj me) | Micrometer, calipers |
| Thickness (hli) | ± 0.005" rau ± 0.015" | Micrometer, calipers |
| Dav (pas) | +0.010" rau +0.125", -0" | Calipers, daim kab xev ntsuas |
| Ntev | +0.125" rau +0.250", -0" | Daim kab xev ntsuas |
| Kev ncaj | 1/8 "hauv 3 ko taw (tseem) | Straightedge, feeler gauge |
| Nto tiav | Raws li tau teev tseg (feem ntau 63-125 Ra) | Kev pom, profileometer |
Surface Quality Requirements:
Tsis Muaj Kev Tso Cai: Cracks, laps, seams, pits, scratches, tuag marks.
Txais: Cov kab kos duab teeb, cov cim tuav me me (yog tias nyob rau hauv tiav spec).
Kev tshuaj xyuas: Pom pom hauv qab teeb pom kev zoo; PT rau thaj chaw tseem ceeb.
Corrosion Testing (Qhov tseem ceeb rau B-Alloys):
ASTM G28 Txoj Kev A:
Lub hom phiaj: Tshawb xyuas qhov cuam tshuam rau intergranular corrosion.
Ib puag ncig: Boiling ferric sulfate-sulfuric acid (50% H₂SO₄ + ferric sulfate).
Duration: 24 teev (tseem ceeb).
Txais: Corrosion rate Tsawg dua lossis sib npaug li 0.5 mm / xyoo (zoo ib yam; cov neeg siv khoom- tshwj xeeb).
Qhov tseem ceeb rau B-Alloys: Xyuas kom tseeb tias kev kho cua sov ua haujlwm tau zoo thiab cov khoom tsis muaj kev puas tsuaj los ntawm nag lossis daus.
ASTM G28 Txoj Kev B:
Lub hom phiaj: Ntsuam xyuas kev tiv thaiv corrosion.
Ib puag ncig: Boiling sulfuric acid nrog ferric sulfate (qhov sib txawv).
Kev Cai Corrosion Test:
Simulated txheej txheem ib puag ncig (piv txwv li, boiling HCl ntawm tej concentration).
Kev sim daim coupon hauv qhov tseeb lossis simulated txheej txheem.
Kev kuaj tshwj xeeb rau cov ntawv thov tseem ceeb:
| Kuaj | Lub hom phiaj | Yam yuav tsum tau muaj |
|---|---|---|
| Loj Loj | Txheeb xyuas cov txheej txheem microstructure | ASTM 4-7 rau ASTM E112 |
| Inclusion Rating | Kev ntsuas kev huv | Raws li ASTM E45 |
| Kev Tshawb Fawb Hardness | Txheeb xyuas qhov sib xws | Tsis pub dhau qhov txwv |
| Microstructural Examination | Txheeb xyuas cov theem kom raug | Tsis muaj kev puas tsuaj rau precipitates (theem, μ theem) |
| Khoov Test | Txheeb xyuas qhov ductility | Raws li ASTM B335 |
| Kev nyuaj siab Repture | Siab - qhov kub thiab txias | Yog tias xav tau rau kev pabcuam siab |
Cov ntaub ntawv pob (Tswj rau Kev Pabcuam Tseem Ceeb):
| Cov ntaub ntawv | Cov ntsiab lus |
|---|---|
| Certified Mill Test Report | Chemistry, mechanicals, kho cua sov |
| NDE Reports | UT, ET, PT ceeb toom nrog cov txiaj ntsig |
| Dimensional Inspection Report | Ntsuas qhov ntev |
| PMI Report | Kev txheeb xyuas qib rau txhua qhov bar |
| Corrosion Test Reports | ASTM G28 cov txiaj ntsig (tseem ceeb rau B-alloys) |
| Kev kho cua sov | Rauv lub sij hawm-cov ntaub ntawv kub |
| Daim Ntawv Pov Thawj Ua Raws Cai | Nqe lus piav qhia txog kev ua raws cai |
| Cov ntaub ntawv Traceability | Thaum tshav kub kub rau bar daim ntawv qhia |
ASTM B335 Cov Lus Cog Tseg:
ASTM B 335 Cov Lus Qhia Tshwj Xeeb
Qib (UNS N10675)
Loj (inch los yog hla -section × length)
Kub naj npawb
Tus neeg tsim khoom lub npe lossis lub cim lag luam
Lub teb chaws ntawm keeb kwm
Ntim thiab Kev Tiv Thaiv:
Kev qhwv tus kheej lossis lub tes tsho yas rau polished tuav.
Cov kaus mom kawg los tiv thaiv qhov kawg ntawm kev puas tsuaj.
Bundle wrapping nrog cov khoom tiv thaiv.
Ntoo crating rau export lossis xa khoom tseem ceeb.
Desiccant rau ya raws -sensitive applications.
Kev sib cais los ntawm carbon steel thaum khaws cia thiab xa khoom.
Kev lees paub rau Kev Pabcuam Tseem Ceeb:
Tsis muaj qhov chaw lossis sab hauv.
Chemical composition nyob rau hauv specification.
Mechanical zog lub rooj sib tham los yog tshaj minima.
Dimensional ua raws li ASTM B335 lossis cov neeg siv khoom PO.
PMI txheeb xyuas (100%).
Corrosion xeem dhau (ASTM G28 Tsawg dua lossis sib npaug ntawm 0.5 hli / xyoo raug).
Cov ntaub ntawv tag nrho muab.
5. Cov kev xav txog kev kho cua sov dab tsi yog tshwj xeeb rau Hastelloy N10675 alloy tuav, thiab kev txhim kho thermal stability zoo li cas?
Kev kho cua sov ntawm Hastelloy N10675 alloy tuav yog qhov tseem ceeb rau kev ua tiav qhov kev xav tau ntawm kev siv tshuab thiab kev tiv thaiv corrosion. Lub alloy qhov kev txhim kho thermal stability dhau los ua ntej B-2 alloys ua kom yooj yim fabrication thaum tswj kev ua haujlwm tshwj xeeb.
Kev Xaiv Kho Kub Kub:
Solution Annealing (Standard Condition):
Kub: 2050℃F - 2150℃F (1120℃- 1175℃).
Lub sij hawm: 30-60 feeb ib nti ntawm tuab (tsawg kawg 15 feeb).
Cua txias: ceev ceev quench (dej los yog roj ceev txias).
Lub hom phiaj:
Dissolve tej theem precipitated (carbides, intermetallic).
Ua tiav homogeneous, ib zaug -theem austenitic microstructure.
Restore ductility tom qab ua haujlwm kub lossis txias.
Optimize corrosion kuj.
Yam khoom tshwm sim:
Tensile: 110-125 ksi
Yield: 51-65 ksi
Elongation: 40-50%
Hardness: B90-100
Stress Relieving:
Kub: 1600℃F - 1800℃F (870℃- 980℃).
Sijhawm: 1-4 teev nyob ntawm qhov loj me.
Ua kom txias: qeeb qeeb (qhov cub lossis cua).
Lub hom phiaj:
Txo cov kev ntxhov siab seem ntawm kev ua haujlwm txias los yog machining.
Txhim kho qhov seem stability thaum precision machining.
Kev ceeb toom rau B-Alloys: Qhov kub thiab txias no yog qhov uas cov theem tsis zoo tuaj yeem ua rau nag. Rau N10675, qhov kev pheej hmoo yog qis dua B-2, tab sis tseem tam sim no. Tshawb xyuas nrog kev kuaj corrosion yog tias siv kev ntxhov siab.
Yam khoom tshwm sim:
Me ntsis siab zog tshaj annealed.
Txo ductility.
Annealed thiab Txias Drawn (Temper):
Txheej Txheem: Txias kos duab tom qab cov tshuaj annealing.
Cov nyhuv: Ua kom muaj zog, txo cov ductility los ntawm kev ua haujlwm hardening.
Muaj Tempers:
Quarter Hard: Lub teeb txias ua haujlwm (txo 5-10%).
Ib nrab Hard: Kev ua haujlwm txias txias (10-20% txo).
Full Hard: Ua haujlwm txias siab tshaj plaws (20-30% txo).
Daim ntaub ntawv: Qhov twg muaj zog dua xav tau yam tsis muaj kev kho cua sov (fasteners, shafts).
Yam khoom tshwm sim:
Tensile: Mus txog 140-160 ksi
Tawm tswv yim: Mus txog 100-120 ksi
Elongation: 10-20% (nyob ntawm tus npau taws)
Qhov "B-2 nyhuv" thiab yuav ua li cas N10675 txhim kho raws li nws:
Tus thawj Hastelloy B-2 tau raug tsim los ntawm theem intermetallic (Ni-Mo xaj theem, tshwj xeeb tshaj yog theem) thaum raug kub nyob rau hauv thaj tsam ntawm 1200℃F-1600℃F (650℃-870℃). Qhov no tuaj yeem tshwm sim thaum:
Maj mam txias los ntawm qhov chaw no tom qab annealing.
Kev kho cua sov hauv qhov no (kev ntxhov siab nyem).
Ntau qhov kev sib txuas nrog cov khoom siv hluav taws xob siab.
Cov theem no ua rau muaj kev cuam tshuam loj heev thiab poob ntawm kev tiv thaiv corrosion, ua rau lub sij hawm "B-2 nyhuv."
N10675 (B-3) Kev Txhim Kho:
Slower Precipitation Kinetics: Lub optimized chemistry (tswj chromium, silicon tsawg heev, muaj pes tsawg leeg) ho slows tus nqi ntawm theem nag lossis daus. Qhov no muab qhov dav dua "qhov rais fabrication."
Kev kam rau siab rau Thermal Cycling: Cheebtsam tuaj yeem tiv taus ntau qhov kev sib txuas los yog cov cua kub nruab nrab yam tsis muaj qhov tseem ceeb.
Kev zam txim ntawm Txias Txias: Txawm hais tias quench ceev yog tseem pom zoo, N10675 tsis tshua muaj siab rau qis qis qis qis dua B-2.
Txo kev pheej hmoo ntawm Embrittlement: Qhov tseem ceeb txo qhov kev pheej hmoo ntawm kev tawg thaum sib sau, xov, lossis ua haujlwm txias.
Qhov cuam tshuam rau Mechanical Properties:
| Qhov xwm txheej | Tensile zog (ksi) | Yield zog (ksi) | Elongation (%) | Hardness (HRB / HRC) |
|---|---|---|---|---|
| Kev daws Annealed | 110-125 | 51-65 | 40-50 | B90-100 |
| Kev ntxhov siab | 115-130 | 55-70 | 35-45 | B95-105 |
| Cold Drawn (Lub teeb) | 125-140 | 80-100 | 25-35 | B100-110 |
| Cold Drawn (Hnyav) | 140-160 | 100-120 | 10-20 | C20-30 |
Qhov cuam tshuam rau Corrosion Resistance:
| Qhov xwm txheej | Intergranular Corrosion | General Corrosion (HCl) |
|---|---|---|
| Kev daws Annealed | Zoo tshaj | Zoo tshaj |
| Kev ntxhov siab (tsim nyog) | Zoo (yog tias tsis muaj nag lossis daus theem) | Zoo |
| Kev ntxhov siab (tsis tsim nyog) | Txo (yog tias theem ua ntej) | Txo |
| Txias Drawn | Zoo (zoo li annealed) | Zoo |
| Tsis tsim nyog Annealed | Txo qhov tseem ceeb | Txo qhov tseem ceeb |
Kev txiav txim siab Microstructural:
Phase nag lossis daus:
Qhov kev txhawj xeeb tseem ceeb yog nag lossis daus ntawm Ni-Mo xaj theem (theem) thiab carbides.
N10675 yog tsim los tiv thaiv nag lossis daus, tab sis ntev - lub sij hawm raug ntawm 1200℃F-1600℃F tseem tuaj yeem ua rau qee qhov hloov pauv.
Tshawb xyuas nrog ASTM G28 corrosion test tom qab muaj thermal raug.
Loj Loj:
Tshuaj annealing kub thiab lub sij hawm tswj grain loj.
Finer grain (ASTM 5-7) nyiam rau kev qaug zog thiab kev ua haujlwm.
Coarser nplej tuaj yeem txhim kho creep tsis kam (tsis tshua xav tau rau N10675).
Cov lus pom zoo rau kev kho cua sov los ntawm daim ntawv thov:
| Daim ntawv thov | Pom zoo mob | Kev xav |
|---|---|---|
| Pump shafts, valve stems | Cov tshuaj annealed + txias kos (tswj temper) | Combines lub zog nrog corrosion kuj |
| Fasteners | Lub caij ntuj sov (zoo li npau taws) | Lub zog rau preload; threads dov tom qab kos duab |
| Machined Cheebtsam los ntawm bar | Tshuaj annealed | Qhov zoo tshaj plaws corrosion kuj; yooj yim machining |
| Cheebtsam xav tau kev ntxhov siab | Kev ntxhov siab los ntawm 1700℃F max, xyuas nrog kev kuaj corrosion | Dimension stability; txheeb xyuas tsis muaj nag lossis daus theem |
| Welded fabrications | Tshuaj annealed ua ntej welding; tsis xav tau PWHT | N10675 ua siab ntev ntawm vuam thermal cycles |
Kev Tshawb Fawb Txog Kev Kho Kub Kub:
| Kuaj | Lub hom phiaj |
|---|---|
| Kev kuaj Hardness | Txheeb xyuas qhov sib xws thiab qhov xwm txheej zoo |
| Microstructural Examination | Txheeb xyuas qhov loj me, txheeb xyuas cov dej nag |
| Mechanical Testing | Paub meej tias tensile zog ua tau raws li qhov yuav tsum tau ua |
| Kev kuaj Corrosion (ASTM G28) | Nws yog ib qho tseem ceeb los xyuas kom meej corrosion tsis kam tom qab muaj thermal raug |
Cov lus qhia rau kev kho cua sov N10675 Bars:
Tiv thaiv nto thaum kho cua sov (nqus, inert cua, los yog tiv thaiv txheej).
Tsis txhob kis kab mob los ntawm qhov cub hluav taws xob lossis cua (sulfur, halogens).
Txhawb tuav kom tiv thaiv sagging ntawm qhov kub thiab txias.
Xyuas kom ceev ceev quench (dej nyiam) kom txo tau lub sij hawm nyob rau hauv ntau yam los nag.
Ntxuav tom qab kev kho cua sov kom tshem tawm cov oxide lossis cov seem.
Nco ntsoov xyuas nrog kev kuaj corrosion tom qab kev ua haujlwm thermal.
