1. Thaum muaj feem ntau colloquially hu ua "super stainless," Dab tsi sib txawv txawv zais, thiab koj tau cais tawm li nickel - based supalloys?
Lo lus "Super Stainless" yog cov dab neeg tsis paub hais tias lawv tau ua haujlwm zoo dua; Txawm li cas los xij, Inconel 625 (tsis yog N06625) thiab 725 (tsis yog necel {}}}}}}}}} Cov khoom siv cuam tshuam rau lawv cov khoom thiab kev siv.
Base Chemistry: True stainless steels are iron-based (Fe > 50%), with chromium (>10.5%) raws li kev ua haujlwm enloy rau corrosion tsis kam. Hauv kev sib piv, ob qho tib si 625 thiab 725 yog Nickel - raws li 625, NI 50% rau 725). This high nickel content provides a stable austenitic matrix and is the root of their exceptional resistance to chloride-induced stress corrosion cracking (SCC), a primary failure mode for stainless steels in chloride-bearing environments.
Muaj zog zuj zus tshuab: Txheem stainless hlau (piv txwv li, 304, 316) tau ntxiv dag zog los ntawm kev ua haujlwm txias. Inconel 625 yog ntxiv dag zog los ntawm cov khoom - Kev daws cov nyhuv tawv thiab niobium nyob rau hauv nws npib tsib xee {} Chromium Matrix. Inconel 725 yog nag lossis daus-} Heev los ntawm kev kho cua sov uas ua rau muaj lub zog thaum tshav kub.
Cov hlau uas tsis muaj zog: thaum lub hnab ntim ua tau tsawg rau qhov kub thiab txias thiab cov kev pab cuam corrosive, nickel alloys ua haujlwm nyob rau hauv loj heev tiag tiag tiag tiag tiag tiag. Lawv muaj:
Huab corrosion resistance: superior tiv taus pittings, thiab muaj acidic ib puag ncig, kom ntau heev pitting tiv taus tus lej (pren> 40 rau 725).
High - kub lub zog: khaws lub zog tseem ceeb thiab tiv thaiv oxidation ntawm qhov kub thiab txias yuav soften thiab teev ntau dhau.
SOUR kev ntseeg tau: muaj pov thawj, muaj kev tiv thaiv mus rau sulfide kev ntxhov siab tawg (SSO 15156, ua rau lawv yuav tsum tau siv rau cov roj qaub thiab roj av.
Hu rau lawv "Stainless" Undersells lawv lub peev xwm; Lawv yog cov ntaub ntawv tsim txiaj tau tsim rau cov ntawv thov uas cov hlau uas tsis muaj zog yog qhov tsis txaus.
2. Nyob rau hauv lub ntsiab lus xav tau ntawm bayea roj thiab roj ntau lawm yog tus kws ua choj qhia cov kim kim dua inconel 725 cov yeeb nkab hla ntau qhov inconel 625?
Qhov kev xaiv ntawm 625 thiab 725 yog ib qho kev txiav txim siab los ntawm kev sib npaug tshwj xeeb ntawm cov neeg kho tshuab thauj thiab mob corrosive, ncaj ncees cuam tshuam kev tsim kho thiab kev nyab xeeb.
Cov ntaub ntawv rau inconel 625 (khoom -}} daws zog):
Cov zog: Zoo tshaj plaws corrosion distance, zoo nkauj ntas thiab weldability, thiab lub zog zoo txog 1200℃f (650 degree).
Kev siv Flatlines zoo li, zoo tagnrho cov hnab ntawv, thiab cov khoom siv sab hauv yog qhov ua kom muaj zog ntawm 725.
Cov ntaub ntawv rau inconel 725 (nag lossis daus - wardenable):
Cov zog: nws qhov kev pab cuam sai yog ultra - siab} lub zog siab. Tom qab kev laus, nws ua tiav tau cov txiaj ntsig lub zog (~ 1230 KSI / 825 MPa) kwv yees li ob zaug uas muaj qhov kub thiab txias thiab muaj zoo sib xws ntawm kev tiv thaiv corrosion zoo tshaj plaws.
Kev Siv: Teev rau cov ntawv thov seanast ntau tshaj plaws uas ob leeg siab heev siab yog tam sim no:
Siab - qhov siab / siab {1} Cov khoom siv tseem ceeb (HP
Cov khoom siv tob tob: qhov chaw sib xyaw ua ke ntawm hydrostatic siab thiab sab hauv lub siab zoo ua rau cov yeeb nkab loj rau cov yeeb nkab.
Tuab -} phab ntsa siab cov hlab ntsha: siv 725 tso cai rau tib lub siab ntsuas kom zoo li 625, muab cov peev txheej sib piv ntawm ntug dej.
Qhov kev txiav txim siab hinges ntawm no: yog tias tus qauv tsim yog corrosion -}}}} omnated, 625 feem ntau txaus. Yog tias nws yog qhov siab -}}}}}}}}}}}}}} Tshaj kev nyab xeeb tshaj plaws hauv kev muaj kev nyab xeeb, 725 yog qhov tsim nyog.
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Thaum ob qho tib si alloys yog weldable, lawv nthuav qhia cov kev sib tw uas yuav tsum tau tswj cov txheej txheem tswj lawv cov khoom corrosion thiab cov neeg kho tshuab.
Inconel 625 Vuam:
Txheej Txheem: Roj Tungsten Arc Vuam (GTaw / TIG) yog qhov zoo rau lub hauv paus dhau mus; GMAW / MIG thiab SMAW YUAV SIV RAU FILL.
Muab tub lim hlau: ernicrmo-3 (ib qho kev muab ua ke) yog qauv. Nws yog qhov yooj yim muaj thiab tsim cov weldment nrog corrosion tsis kam zoo ib yam li cov hlau sib txuas.
Kev tiv thaiv: Cov kev txhawj xeeb thawj yog kev tiv thaiv weld hlau kub tawg (los ntawm kev tswj cov kab mob uas tsis huv thiab ua kom tsis txhob muaj paug.
Inconel 725 Vuam:
Txheej Txheem: GTAWW / TIG yog xav pom zoo rau nws qhov tseeb.
Tus neeg sib koom ua ke: qhov no yog kev xaiv tseem ceeb. Rau siab tshaj plaws corrosion tsis kam, ernicrmo - 3 (625 muab tub lim) feem ntau siv. Rau lub zog tshaj plaws hauv kev siv hluav taws xob, ib qho kev muab ua hlau sib xyaw hlau 725 yuav tsum tau siv, ua raws li los ntawm kev kho cua sov tag nrho (pWht).
Cov kev sib tw: qhov yuav tsum tau rau PWHT yog qhov kev sib tw tshaj plaws. Tag nrho welded tivthaiv yuav tsum tau yub ib qho kev daws teeb meem thiab kev ua haujlwm ua kom yaj ua kom pom cov qib weld thiab cua sov}} be} cuam tshuam cheeb tsam (Haz). Qhov no yog ib qho nyuaj, kim, thiab feem ntau yuav khw - Txawm li cas los xij, cuam tshuam ntxiv, loj txwv teb cov khoom muaj peev xwm.
Rau ob qho alloys, impeccable kev huv si, tswj kev kub ceev thaum tshav kub kub, thiab kev siv siab {{sib tham kom tsis txhob qhia tej yam tsis xws luag.
4. Dhau ntawm cov roj txuas ntxiv thiab roj, dab tsi lwm cov ntawv thov kev txom nyem uas xav tau siv ntawm 625 lossis 725 yeeb nkab?
Qhov tshwj xeeb ntawm cov alloys ua rau lawv tseem ceeb hla ntau yam kev lag luam uas ua haujlwm ntawm cov kev txwv ntawm cov khoom siv.
Tshuaj lom neeg: Siv hauv cov kav dej thiab reactors tuav cov tshuaj muaj zog heev ntawm cov hlau kub thiab cov kab mob kas fes, thiab lwm cov hlau kub hnyiab yuav raug kev txom nyem sai pitting thiab tsis ua haujlwm.
Lub zog tiam:
Flue Gas Desulfurization (FGD) Lub tshuab ntub dej ntub dej ntub dej cov kua ntoo acid thiab chlorides hauv cov chav ntxuav.
Advanced nuclear tshuab: cov neeg muaj peev xwm sib tw rau cov kav dej rau hauv cov tshuab tuav cov khoom txias corrosive.
Tubrog nkoj thiab ntug hiav txwv: dej hiav txwv cua txias system ua rau cov kab mob uas muaj kev phom sij uas muaj kev cuam tshuam rau kev yaig ntawm kev tiv thaiv kab mob tsawg tsawg.
Roj & Roj Refining: nqes dej nyob rau hauv Hydrocackers thiab lwm yam nyob rau qhov twg siab siab muaj kev txhawj xeeb yog qhov kev txhawj xeeb.
Aerospace: Thaum tsis yog feem ntau hauv cov yeeb nkab daim ntawv, cov alloys tau siv hauv lub zog siab thiab}}} qhov hnyav piv thiab corrosion tsis kam.
5. Yuav ua li cas cov qauv kev lag luam thiab kev paub zoo kev paub zoo rau cov no "Super Stainless" kav txawv txawv ntawm cov qauv hlau stainless hlau?
Cov Qauv thiab QA rau cov siab no - tus nqi, kev nyab xeeb - Cov khoom sib cav tseem ceeb dua.
Cov Qauv Qauv: Lawv tau tswj hwm los ntawm cov astm / ASME Cov Qauv:
Inconel 625 Yeeb: Astm B444 / ASME SB-444 (rau seamless yeeb) thiab ASTM B705 / ASME SB-705 (rau Welded yeeb nkab).
Inconel 725 Yeeb: Astm B424 / ASME SB-424 (rau PHAJ-424 (rau cov ntawv / ntawv siv los ua cov yeeb nkab, feem ntau ntawm rolling thiab vuam).
NACE MR0175 / ISO 15156 Kev Ua Raws: Qhov no yuav tsum muaj kev tsim nyog siv rau hauv kev siv qaub (h}}}}}}}}}}}}}}}}}}}}}}}} tso cov roj thiab roj kev pabcuam. Cov tshuaj tua kab mob alloy thiab kev kho cua sov yuav tsum muaj ntawv pov thawj kom poob rau hauv txoj kev txwv nruj ntawm cov qauv no.
Tsis - Kev sim tshuaj (ndt) Zas kev sim tshuaj (PT)
Daim ntawv pov thawj thiab muaj kev sib tw: txhua qhov hluav taws xob ntev los ua pov thawj ntawm kev ntsuam xyuas tshuaj lom neeg (mtr) ua rau cov qauv ntawm cov khoom siv los ntawm cov khoom cua sov. Tag nrho traceazeability los ntawm cov nyoos yaj rau cov khoom kawg yog qhov yuav tsum tau ua.
The entire manufacturing and certification process is designed to provide absolute confidence in the integrity of a component where failure could have catastrophic environmental, safety, and economic consequences.
