1. Q: Dab tsi yog cov tshuaj muaj pes tsawg leeg ntawm Incoloy 800H (UNS N08811 / 1.4958), thiab nws txawv li cas ntawm tus qauv Incoloy 800 (UNS N08800)?
A:Incoloy 800H (UNS N08811 / Werkstoff 1.4958) yog kev tswj hwm -Chemistry variant ntawm tus qauv Incoloy 800 series, tshwj xeeb yog tsim los rau txhim kho creep rupture zog thiab siab - kub stability. Nws nominal muaj pes tsawg leeg yog30-35% npib tsib xee, 19-23% chromium, thiab yam tsawg kawg nkaus39.5% yog ', nrog precisely tswj ntxiv ntawmAluminium (0.15-0.60%) , titanium (0.15-0.60%), thiabcarbon (0.06-0.10%) .
Qhov Tseem Ceeb Ntawm Cov Txheej Txheem Incoloy 800 (UNS N08800):
| Element | Incoloy 800 (N08800) | Incoloy 800H (N08811) | Qhov tseem ceeb |
|---|---|---|---|
| Cov pa roj carbon | 0.10% siab tshaj | 0.06-0.10% (tswj yam tsawg kawg nkaus) | Cov pa roj carbon tsawg tsawg tshaj plaws txhawb kev tsim cov carbide rau lub zog nkag |
| Aluminium + Titanium | Tsis muaj yam tsawg kawg nkaus | 0.85-1.20% sib xyaw | Cov ntawv gamma prime (Ni₃(Al, Ti)) precipitates rau kev txhim kho siab -kub kub |
| Loj Loj | Fine (zoo) | Coarse (ASTM 5 lossis coarser) | Cov nplej ntxhib txo qis ciam teb zawv zawg nyob rau hauv siab - qhov kub thiab txias |
Nkag siab lub npe Convention:
UNS N08811: UAUnified Numbering System xaiv rau Incoloy 800H
1.4958:Werkstoff (German khoom) tus lej tsim
Incoloy 800H:Lub npe lag luam; qhov "H" txhais tias "siab carbon" thiab siab -kub optimized
Yog vim li cas cov kev sib txawv no tseem ceeb:
Incoloy 800H tau tsim tshwj xeeb rau cov ntawv thov uas xav tau:
Creep resistance:Ntev raug rau kev ntxhov siab ntawm qhov kub siab
Kev ntxhov siab - tawg lub zog:Kev tiv thaiv tsis ua haujlwm nyob rau hauv kev ruaj ntseg load ntawm qhov kub thiab txias
Ntev -lub sij hawm microstructural stability:Tswj los nag los ntawm kev ntxiv dag zog rau theem tsis muaj embrittlement
Mechanical Properties Comparison (Annealed Condition):
| Khoom | Kev 800 | Incoloy 800 H |
|---|---|---|
| Tensile zog | 75-100 ksi (515-690 MPa) | 75-100 ksi (515-690 MPa) |
| Yield zog | 30-45 ksi (205-310 MPa) | 30-45 ksi (205-310 MPa) |
| Elongation | 30–50% | 30–50% |
| Creep Strength ntawm 1600℃F (870 degree) | Puag | 20-40% siab dua |
Daim ntawv thov cuam tshuam:
Rau petrochemical, lub zog tsim hluav taws xob, thiab cov khoom siv kho cua sov ua haujlwm siab tshaj 1100℃F (595 degree), Incoloy 800H yog qhov kev xaiv zoo tshaj li tus qauv 800 vim nws qhov kev nkag siab zoo dua thiab thermal stability. Rau cov ntawv thov qis dua qhov ntsuas kub no, tus qauv 800 tuaj yeem muab kev ua haujlwm txaus ntawm tus nqi qis.
2. Q: Dab tsi yog cov ntsiab lus tseem ceeb tswj hwm Incoloy 800H bar, thiab lawv yuav tsum ua li cas?
A:Incoloy 800H bar yog tswj hwm los ntawm ntau yam ASTM thiab ASME specifications, nyob ntawm seb cov khoom siv thiab cov kev pab cuam npaj. Kev nkag siab txog cov kev qhia tshwj xeeb no yog qhov tseem ceeb rau kev yuav khoom kom raug thiab ua raws.
Thawj Specifications:
| Specification | Title | Kev siv tau |
|---|---|---|
| ASTM B 408 Cov khoom siv | Txheem Specification rau Nickel-Iron-Chromium Alloy Qws thiab Bar | UNS N08800, N08810, N08811 |
| ASME SB-408 | ASME Boiler thiab Pressure Vessel Code version | Kev siv lub nkoj siab |
| ASTM B564 | Nickel Alloy Forgings | Forged bar, flanges, fittings |
| TIAB SA 5766 | Aerospace Khoom Specification rau Incoloy 800H Bar | Aerospace applications |
ASTM B408 Cov Lus Qhia rau UNS N08811:
| Kev xav tau | Specification |
|---|---|
| Nickel | 30.0–35.0% |
| Chromium | 19.0–23.0% |
| Cov pa roj carbon | 0.06–0.10% |
| Aluminium + Titanium | 0.85–1.20% |
| Tensile zog | 75 ksi (515 MPa) yam tsawg kawg nkaus |
| Yield zog (0.2% offset) | 30 ksi (205 MPa) yam tsawg kawg nkaus |
| Elongation (hauv 4D) | 30% yam tsawg kawg nkaus |
| Kev kho cua sov | Cov tshuaj annealed ntawm 2100-2200℃F (1150-1205 degree), txias ceev |
Thaum tshav kub kub kho mob:
ASTM B408 xav kom Incoloy 800H bar yuav tsum tau muab rau hauv lubtshuaj-annealed mob. Txoj kev kho no:
Dissolves tej precipitated carbides
Ua ib qho kev sib xws, ntxhib grain qauv (feem ntau ASTM 5 lossis coarser)
Maximizes creep kuj rau siab kub kev pab cuam
Muab qhov zoo tshaj plaws ductility rau fabrication
Product Forms thiab Dimensions:
| Daim ntawv | Hom kab uas hla | Daim ntawv thov |
|---|---|---|
| Kub-Rolled Bar | 0.5-8.0 nti (12.7-203 hli) | General engineering, structural Cheebtsam |
| Txias-Tiav Bar | 0.125-4.0 nti (3.2-102 hli) | Precision machined Cheebtsam, fasteners |
| Forged Bar | 2.0–{1}} ntiv tes (51–{3}} mm) | Loj flanges, valve lub cev, hnyav seem |
ASME Code Ua raws:
Rau kev siv lub nkoj siab raws li ASME Tshooj VIII, Division 1:
Cov khoom yuav tsum ua raws li ASME SB-408
ASME Code Case 1325 tshwj xeeb pom zoo Incoloy 800H rau kev siv txog 1650℃F (900 degree)
Cov ntaub ntawv yuav tsum raug ntaus nrog ASME Code cim thaum xav tau
Kev Xeem Ntxiv:
Rau cov ntawv thov tseem ceeb, kev ntsuas ntxiv tuaj yeem suav nrog:
Kev kuaj ultrasonic:Rau internal discontinuities
Liquid Penetrant Testing:Rau qhov tsis xws luag
Grain Size Determination:Kev txheeb xyuas ntawm coarse grain qauv
Kev ntxhov siab -Kev kuaj kev puas tsuaj:Rau siab -kev ntsuas qhov ntsuas kub
Rau kev yuav khoom, qhia qhov tseeb ASTM lossis ASME tus qauv nrog rau qib qib (UNS N08811) ua kom tau txais cov khoom siv nrog cov ntsiab lus carbon uas tsim nyog, cov qauv nplej, thiab cov khoom siv kho tshuab rau siab - kev pabcuam kub.
3. Q: Dab tsi yog cov ntawv thov tseem ceeb rau Incoloy 800H bar hauv kev lag luam, thiab vim li cas nws thiaj nyiam?
A:Incoloy 800H bar ua haujlwm tseem ceeb hauv ntau qhov kev lag luam uas yuav tsum muaj siab - qhov kub thiab txias, oxidation tsis kam, thiab creep resistance. Lub alloy qhov tshwj xeeb ua ke ntawm cov khoom ua rau nws cov khoom ntawm kev xaiv rau cov khoom ua haujlwm siab tshaj 1100℃F (595℃).
Petrochemical thiab Chemical Processing:
| Daim ntawv thov | Cheebtsam | Kev Pabcuam |
|---|---|---|
| Chav Methane Reforming | Reformer raj txhawb nqa, qhov hluav taws xob manifolds, flanges | 1600-1800℃F (870-980 degree), hydrogen cua |
| Ethylene Cracking | Hloov kab exchangers, piping, fittings | 1500-1650℃F (815-900 degree), thermal cycling |
| Ammonia Production | Siab -kub kav, txhawb nqa catalyst | 1300-1700℃F (705-925 degree), txo ib puag ncig |
| Hydrogen ntau lawm | Reformers, kub exchangers, li qub | 1400-1800℃F (760-980 degree), hydrogen-nplua nuj gas |
Kev tsim hluav taws xob:
| Daim ntawv thov | Cheebtsam | Kev Pabcuam |
|---|---|---|
| Superheaters | Tube txhawb nqa, hangers, fasteners | 1100-1500℃F (595-815 degree), chav nyob ib puag ncig |
| Gas Turbines | Combustor Cheebtsam, hloov ducts | 1500-1800℃F (815-980 degree), combustion gases |
| Pov tseg-rau-Zoo | Grates, cov khoom siv hluav taws xob, kev ua kom sov | 1400-1800℃F (760-980 degree), corrosive flue gases |
Kev kho cua sov thiab cov khoom siv rauv:
| Daim ntawv thov | Cheebtsam | Kev Pabcuam |
|---|---|---|
| Muaj Furnaces | Radiant tubes, muffles, retorts, daim phiaj | 1600-2000℃F (870-1093 degree), thermal cycling |
| Thaum tshav kub kub kho Fixtures | Baskets, tais, jigs | 1500-1900℃F (815-1038 degree), ntau yam huab cua |
| Ceramic Kilns | Kiln rooj tog, kev txhawb nqa, ntsia | 1800-2200℃F (982-1204 degree), oxidizing ib puag ncig |
Vim li cas Incoloy 800H nyiam:
| Kev xav tau | Incoloy 800H Advantage |
|---|---|
| Creep zog | Tswj cov pa roj carbon thiab Al + Ti muab kev nkag siab zoo txog 1800℃F |
| Oxidation Resistance | High chromium (19–23%) tsim ruaj khov Cr₂O₃ nplai; aluminium ntxiv kev tiv thaiv ntxiv |
| Carburization Resistance | Qhov ruaj khov oxide txheej tiv thaiv cov pa roj carbon ingress |
| Thermal Fatigue | Coarse grain qauv thiab siab ductility tiv thaiv tawg thaum lub sij hawm thermal cycles |
| Fabricability | Zoo weldability thiab formability piv rau ntau nag lossis daus -hardened superalloys |
| Tus nqi -Kev ua tau zoo | Cov ntsiab lus nickel qis dua (30–35%) dua li ntau cov nickel-raws li superalloys muab nqi kom zoo dua |
Kev sib piv:
| Khoom siv | Qhov Kev Pab Cuam Siab Tshaj | Creep Strength ntawm 1600℃F | Tus nqi txheeb ze |
|---|---|---|---|
| Incoloy 800 H | 1800℃F (982 degree) | Zoo heev | Nruab nrab |
| Inconel 600 | 2000℃F (1093 degree) | Nruab nrab | Siab dua |
| Ib 625 | 1800℃F (982 degree) | Zoo | Siab dua |
| 310 Stainless hlau | 2000℃F (1093 degree) | txwv | qis |
| ib 718 | 1300 ° F (704 ° F) | Zoo heev | Siab dua |
Rau cov kws tshaj lij thiab cov kws tshaj lij, Incoloy 800H bar muaj qhov zoo tshaj qhov sib npaug ntawm siab - kub lub zog, oxidation tsis kam, fabricability, thiab nqi rau daim ntawv thov mus txog 1800℃F (982℃).
4. Q: Yam dab tsi cuam tshuam rau tus nqi ntawm Incoloy 800H bar, thiab cov neeg yuav khoom tuaj yeem ua tiav tus nqi sib tw?
A:Tus nqi ntawm Incoloy 800H (UNS N08811 / 1.4958) bar yog cuam tshuam los ntawm ntau yam, los ntawm cov nqi raw khoom mus rau kev tsim khoom nyuaj. Kev nkag siab txog cov xwm txheej no ua rau cov neeg yuav khoom los txiav txim siab txog kev yuav khoom thiab txheeb xyuas cov hauv kev rau kev sib tw nqi.
Tus Nqi Tseem Ceeb:
| Qhov xwm txheej | Kev cuam tshuam | Kev piav qhia |
|---|---|---|
| Nickel Nqe (LME) | Thawj tus tsav tsheb | Nickel tso nyiaj rau 30-35% ntawm cov muaj pes tsawg leeg; LME nickel tus nqi hloov pauv ncaj qha cuam tshuam tus nqi |
| Chromium Nqe | Secondary tsav tsheb | Chromium 19-23% muaj pes tsawg leeg; ferrochrome nqi cuam tshuam tus nqi |
| Melting xyaum | 10-20% premium | Nqus induction melting (VIM) rau siab - cov khoom zoo ntxiv tus nqi |
| Daim ntawv khoom | Hloov pauv | Txias-ua tiav bar feem ntau 15–30% hwm tshaj kub- dov |
| Txoj kab uas hla | Inverse kev sib raug zoo | Cov kab me me (<0.5 inch) carry higher per-pound cost due to processing |
| Ntau | Cov nqi txo nqi | Kev txiav txim loj dua (5,000+ lbs) ua tiav qis dua rau - phaus nqi |
| Cov ntawv pov thawj | 5-15% premium | ASME Code, NACE, lossis aerospace certifications ntxiv cov nqi kuaj thiab cov ntaub ntawv |
Raw Material Cost Structure (Illustrative):
| Cheebtsam | Kwv yees kwv yees |
|---|---|
| Nickel (LME-raws li) | 40-50% ntawm tag nrho cov nqi |
| Chromium thiab lwm yam alloys | 15–20% |
| Melting thiab ua | 15–20% |
| Rolling thiab Finishing | 10–15% |
| Kev xeem thiab ntawv pov thawj | 5–10% |
| Nyiaj thiab nyiaj siv ua haujlwm | 5–10% |
Daim ntawv vs. Nqe sib txheeb:
| Daim ntawv | Hom Nqe Txoj Haujlwm | Daim ntawv thov zoo tshaj plaws |
|---|---|---|
| Kub-Rolled Bar (Raws li-Rolled) | qis tshaj | Forging, hnyav machining, kev siv cov qauv |
| Kub-Rolled, Annealed & Pickled | Nruab nrab | General engineering, machined Cheebtsam |
| Txias-Tiav Bar (Tig / Hauv av) | Hwm | Precision machined qhov chaw, fasteners, nruj tolerances |
| Forged Bar | Hwm | Loj -inch flanges, valve lub cev, seem hnyav |
Diameter Pricing Trends:
Hauv qab 0.5 nti (12.7 mm):Tus nqi siab tshaj rau ib - phaus vim muaj ntau qhov kev kos duab txias
0.5-2.0 nti (12.7-50.8 hli):Tus nqi nruab nrab; txheem ntau lawm ntau thiab tsawg
2.0-6.0 nti (50.8-152 hli):Tsawg tus nqi ib - phaus; rolling zoo
Tshaj 6.0 nti (152 mm):Siab dua ib- phaus nqi; tshwj xeeb forging yuav tsum tau
Cov tswv yim rau kev sib tw nqi:
| Tswv yim | Mus kom ze | Muaj peev xwm txuag tau |
|---|---|---|
| Volume Consolidation | Muab ntau txoj kab uas hla mus rau hauv ib qho kev txiav txim kom tau raws li zeb MOQs (2,000-5,000 lbs) | 5–15% |
| Xaiv Standard Sizes | Xaiv cov khoom siv dav dav ntau dua li tsis yog - qhov loj me | 10–20% |
| Kub-Rolled vs. Txias-Tiav lawm | Qhia kom kub- dov, annealed & pickled thaum nto tag kam rau siab tso cai | 15–25% |
| Random Ntev | Txais random lengths (10-14 ft) es tsis yog txiav lengths | 5–10% |
| Tshuag vs. Mill Production | Yuav los ntawm cov khoom muag khoom muag thaum muaj | 2-4 lub lis piam ua ntej, tsis muaj MOQ |
| Ntev - Daim Ntawv Pom Zoo Lub Sij Hawm | Tsim kom muaj kev cog lus ntim txhua xyoo nrog zeb lossis tus xa khoom | Nqe stability, kev faib ua ntej |
Market Price Indicators:
Cov neeg yuav khoom yuav tsum saib xyuas:
LME Nickel Nqe:Kev ntsuas txhua hnub; Kev hloov pauv tseem ceeb cuam tshuam rau tag nrho cov nqi nickel alloy
Nickel Alloy Scrap:Cov nqi lag luam thib ob cuam tshuam rau cov tswv yim nqi zeb
Ntiaj teb no Stainless hlau xav tau:Kwv yees li 70% ntawm nickel noj; kev hloov pauv cuam tshuam rau qhov muaj
Nqe piv piv txwv (Illustrative):
| Scenario | Nqe Index |
|---|---|
| LME Nickel (khoom) | 100 (zeeg) |
| Incoloy 800H Kub- Rolled Bar (mills kom muaj nuj nqis) | 400–500 |
| Incoloy 800H Txias -Tiav Bar (mills kom muaj nuj nqis) | 500–650 |
| Incoloy 800H Bar (distributor, me me) | 600–800 |
Kev txiav txim siab tus nqi tseem ceeb:
Thaum "tus nqi" yog qhov tseem ceeb, cov neeg yuav khoom yuav tsum sib npaug tus nqi tiv thaiv:
Quality Assurance:qis dua - cov khoom raug nqi yuav tsis muaj ntawv pov thawj tag nrho lossis kev taug qab
Product Consistency:Reputable mills muab cov muaj pes tsawg leeg thiab cov khoom sib xws
Lub Sijhawm Lead:Cov khoom muaj nyob hauv cov khoom lag luam tuaj yeem ua pov thawj tus nqi nruab nrab ntawm cov zeb- tus nqi ncaj qha
Rau cov neeg yuav khoom nrhiav tus nqi sib tw ntawm Incoloy 800H bar, sib sau ua ke, xaiv qhov ntau thiab tsawg thiab cov ntaub ntawv, thiab leveraging distributor Tshuag cov kev pab cuam muaj peev xwm ua tau cov nyiaj txuag tseem ceeb thaum tswj qhov zoo thiab traceability xav tau rau siab - daim ntawv thov kub.
5. Q: Cov ntawv pov thawj zoo thiab kev coj ua dab tsi kom muaj nuj nqis thaum yuav khoom Incoloy 800H bar?
A:Kev yuav Incoloy 800H bar rau siab - daim ntawv thov kub yuav tsum tau ua tib zoo saib xyuas cov ntawv pov thawj zoo thiab kev coj ua kom ntseeg tau tias cov khoom ua tau raws li cov khoom siv thiab kev cia siab ntev ntev -. Cov kev coj ua hauv qab no pab sib npaug tus nqi thiab zoo.
Yuav tsum muaj cov ntaub ntawv zoo:
| Cov ntaub ntawv | Lub hom phiaj | Cov ntsiab lus tseem ceeb |
|---|---|---|
| Mill Test Report (MTR) | Certificate ua raws li ASTM B408 lossis ASME SB-408 | Thaum tshav kub kub, tshuaj ntsuam xyuas, mechanical zog, cov ntsiab lus kho cua sov |
| Daim ntawv pov thawj kho cua sov | Txheeb xyuas cov tshuaj annealing | Kub (2100–2200℃F), txias txoj kev, hnub tim |
| Grain Size Report | Confirms ntxhib grain qauv | ASTM grain loj (feem ntau yog 5 lossis coarser) |
| Positive Material Identification (PMI) | Kev txheeb xyuas qhov sib xyaw | Ni, Cr, C, Al+Ti verification |
Cov ntsiab lus tseem ceeb ntawm Kev Txheeb Xyuas Qhov Zoo:
| Yam khoom | Yuav tsum muaj pov thawj | Qhov tshwm sim ntawm Tsis yog-Kev ua raws cai |
|---|---|---|
| Cov ntsiab lus carbon | 0.06–0.10% | Cov pa roj carbon tsawg tsawg ua rau lub zog nkag; high carbon txo ductility |
| Aluminium + Titanium | 0.85-1.20% sib xyaw | Tsis txaus Al + Ti txo cov nag lossis daus |
| Loj Loj | ASTM 5 los yog coarser | Fine grain txo creep kuj |
| Tshuaj Annealing Kub | 2100-2200 ° F | Qhov kub qis dua tsis ua kom yaj carbide; kub siab ua rau grain loj hlob |
| Hardness | Ib txwm 70–85 HRB | Tshaj hardness yuav qhia tau tias kev kho cua sov tsis raug |
Traceability Requirements:
| Kev xav tau | Kev nqis tes ua |
|---|---|
| Kub naj npawb | Txhua qhov bar yuav tsum tau cim nrog cov xov tooj cua sov traceable rau MTR |
| Specification Marking | ASTM B408 UNS N08811 lossis ASME SB-408 |
| Ntau Traceability | Txiav daim yuav tsum tswj kom muaj kev sib raug zoo rau qhov qub cua sov |
| Cov ntaub ntawv saw | Tag nrho traceability los ntawm zeb mus rau cov neeg siv kawg |
Supplier Evaluation Criteria:
| Qhov xwm txheej | Yuav Nrhiav Dab Tsi |
|---|---|
| Mill Reputation | Tsim cov neeg tsim khoom nrog cov ntaub ntawv zoo; ISO 9001, AS9100 rau aerospace |
| Melting Capability | VIM muaj peev xwm rau siab - cov khoom zoo; cua yaj rau kev siv dav dav |
| Kev kuaj kuaj | Hauv -lub tsev lossis kev lees paub thib peb - tog neeg muaj peev xwm xeem |
| Ntawv pov thawj keeb kwm | Cov ntaub ntawv pov thawj uas muab ASME Code, NACE, lossis cov khoom siv dav hlau |
| Lead Time Reliability | Ua raws li -kev xa khoom raws sijhawm |
Daim ntawv txheeb xyuas khoom:
Thaum yuav Incoloy 800H bar:
Qhia kom tiav Standard:ASTM B408 UNS N08811 (los yog ASME SB-408 rau Code applications)
Txhais qhov xwm txheej:Kev daws annealed (standard)
Qhia Form:Kub- dov, txias- tiav, lossis forged raws li xav tau
Yuav tsum tau MTR nrog Kev Xa Khoom:Tag nrho traceability rau cua sov tooj
Txheeb xyuas cov qoob loo loj:ASTM 5 los yog coarser rau siab -kev siv kub
Tsim Tau Txais Kev Tshawb Fawb:Kev tshuaj xyuas PMI, kev tshuaj xyuas qhov ntev, kev tshuaj xyuas cov ntaub ntawv
Tus nqi vs. Kev txiav txim siab zoo:
| Scenario | Tus Nqi Txoj Haujlwm | Zoo Risk |
|---|---|---|
| Reputable Mill, Daim Ntawv Pov Thawj Tag Nrho | Nruab Nrab-Premium | Tsawg |
| Distributor Tshuag, Tag Nrho Traceability | Nruab nrab | Tsawg |
| Tuam txhab lag luam, Cov ntaub ntawv ib nrab | Tsawg – Nruab Nrab | Nruab nrab |
| Unverified Source, Tsis muaj Traceability | Tsawg | Siab |
Cov teeb meem zoo tshaj plaws kom zam:
| Qhov teeb meem | Txoj kev kuaj xyuas | Qhov tshwm sim |
|---|---|---|
| Qib tsis raug (800 vs. 800H) | PMI, carbon tsom xam | Txo creep zog ntawm qhov kub thiab txias |
| Fine Grain Structure | Kev ntsuam xyuas qhov loj | Tsis zoo creep kuj |
| Kev kho cua sov uas ploj lawm | Kev ntsuam xyuas hardness, MTR tshuaj xyuas | Cov khoom tsis ruaj khov, txo kev ua haujlwm |
| Cov khoom tsis huv | PMI, kev tshuaj xyuas qhov muag | Weldability teeb meem, kev txhawj xeeb corrosion |
Tus nqi -Ntxiv cov kev coj ua:
| Xyaum | Cov txiaj ntsig |
|---|---|
| Consolidated Orders | Tsawg dua ib -pound tus nqi, txo tus nqi tswj hwm |
| Ntev - Daim Ntawv Pom Zoo Lub Sij Hawm | Nqe stability, guaranteed faib, ua ntej ua ntej lub sij hawm |
| Cov Kev Pab Cuam Tshuam | Txo cov sij hawm ua cov hmoov txhuas, txo qhov tsawg kawg nkaus kom muaj nuj nqis |
| Kev pab txhawb nqa | Nkag mus rau daim ntawv thov kev tshaj lij engineering |
Kev ceeb toom tseem ceeb:
Rau cov ntawv thov uas yuav tsum tau ua raws li ASME Code, kev pabcuam nuclear, lossis daim ntawv pov thawj aerospace, cov ntaub ntawv yuav tsum tau muab nrog rau tag nrho traceability thiab daim ntawv pov thawj tsim nyog. Tus nqi nce ntxiv ntawm cov ntaub ntawv pov thawj tsawg tsawg piv rau qhov tshwm sim ntawm cov khoom tsis ua haujlwm hauv siab - kub, siab - siab, lossis kev nyab xeeb- cov ntawv thov tseem ceeb.
Los ntawm kev ua raws li cov kev coj ua thiab kev txheeb xyuas qhov zoo, cov neeg yuav khoom tuaj yeem ua tiav tus nqi sib tw ntawm Incoloy 800H bar thaum ua kom cov khoom ua tau raws li qhov xav tau nruj rau siab - kev pabcuam kub hauv petrochemical, tsim hluav taws xob, thiab kev kho cua sov.
