Cov khoom siv twg yog 690 inconel -} kev paub

1.What cov khoom siv yog dab tsi 690?

Inconel 690 yog ahigh - chromium tsibckel -} Iron Austenitic SuperTalloyspecifically engineered for exceptional resistance to corrosion-particularly stress corrosion cracking (SCC)-in aggressive, high-temperature environments. Nws ua rau kev ua tau zoo ntawm kev ua tau ua ntej lawm alloys (piv txwv li cov khoom siv tshuaj tsw qab, ua rau nws muaj qhov tseem ceeb tshaj plaws yog qhov tseem ceeb, xws li lub zog nuclear.

Cov ntsiab lus tseem ceeb ntawm inconel 690 suav nrog:

Zoo tshaj corrosion Kuj: Nws cov ntsiab lus chromium siab (tshaj 27%) ua rau nws ua qhov ntom ntom, ruaj khov chromium oxide (cr₂o₃) passive zaj duab xis nyob saum npoo. Zaj duab xis no tiv thaiv los ntawm corrosive media li dej, chav, thiab muaj zog resistit, thiab muaj zog resistions, thiab muaj kev pheej hmoo loj rau nuclelear Cheebtsam).

High - kub ruaj khov: Nws tswj hwm cov neeg kho zog zog thiab oxidation tiv taus li 1093℃(nrog kev ua tau zoo hauv ob qho kev ua tau zoo hauv ob qho tib si.

Austenitic Microstructure Zoo: Zoo li Inconel 600, nws muaj tus qauv Austenic (ntsej muag - chaw sau lo lo lus) uas muab rau kev sib txawv ua tiav, kev nyuaj, thiab teeb meem. Nws tuaj yeem muab tau yooj yim welded, forged, dov, lossis machined yam tsis tas yuav tsum muaj cov kev kho mob sai- Cov tshuaj kho kom sov.

Cov Ntawv Sau Tshwj Xeeb: Nws yog feem ntau siv nyob rau hauv lub zog hluav taws xob (piv txwv li cov pa roj hluav taws xob, cov pa roj txheem hluav taws xob tsis kam rau corrosion thiab kub {{sib yeem.

2.What yog cov tshuaj lom neeg muaj pes tsawg leeg ntawm inconel 690?

Cov tshuaj lom neeg muaj pes tsawg leeg ntawm inconel 690 yog kev tswj kom nruj ua ntej corrosion tsis kam, tshwj xeeb yog tswj hwm kev ncaj ncees. Hauv qab no yog cov muaj pes tsawg leeg (los ntawm feem pua hnyav, wt%) ib qho tseem ceeb hauv kev lag luam kev lag luam (piv txwv li 5541, ASME SB-168):

Lub ntsiab	Cov ntsiab lus ntau (WT%)	Lub Chaw Ua Haujlwm Tseem Ceeb
Npib tsib caug (ni)	58.0 – 66.0	Lub hauv paus theem; Muab cov qauv kev ruaj khov rau cov Austenitic Matrix thiab txhim kho kom tiv taus kev xeb.
Chromium (cr)	27.0 – 31.0	Tseem ceeb tshaj plaws; Ua ib qho kev tiv thaiv kev tiv thaiv kab xev oxide kom tawm tsam oxidation, pitting, thiab kev nyuaj siab corrosion tawg.
Hlau (FE)	7.0 – 11.0	Txhim kho cov teeb meem (piv txwv li, reldability, formability, formability, formability) thiab sib npaug ntawm alloy lub ntom tsis muaj kev sib cuam tshuam corrosion.
Carbon (c)	Ntau tshaj 0.05	Txo kom tiv thaiv kev tsim ntawm chromium carbides (piv txwv li, cr axc₆) ntawm cov ciaj ciam av. Carbides Deprete Chromium hauv zos, tsis muaj zog corrosion tsis kam.
Manganese (mn)	Ntau tshaj 0.50	AIDS hauv deoxidation thaum lub sijhawm melting thiab ua rau; tswj kom tsis txhob brittleness lossis kev txo kev cuam tshuam ntawm cov khoom corrosion.
Silicon (si)	Ntau tshaj 0.50	Pab rau deoxidation thiab txhim kho siab - kub oxidation tsis kam; Tshaj yog txwv los tiv thaiv oxide incide.
Tooj Liab (Cu)	Ntau tshaj 0.50	Luas lub caij; Txwv tsis pub tsawg tsawg kom tsis txhob txo kev cuam tshuam rau kev ntxhov siab corrosion tawg.
Sulphur (s)	Ntau tshaj 0.015	Nruj me ntsis kom tiv thaiv cov kev tawg kub thaum vuam thiab kom tsis txhob muaj cov corrosion (piv txwv li) nyob rau hauv ib puag ncig hnyav.
Phosphorus (p)	Ntau tshaj 0.015	Tswj rau theem qis kom tiv thaiv embrittlement thiab kev tsis taus ntawm corrosion tsis kam, tshwj xeeb tshaj yog nyob rau hauv high- kub dej.
Aluminium (AL)	Ntau Npaum 0.30	Lw impredurity; Txwv tsis pub kom zam dhau kev tsim ntawm brittle intermetallic theem uas tuaj yeem txo cov qauv sib zog.
Titanium (ti)	Ntau Npaum 0.30	Lw impredurity; Txwv tsis pub tiv thaiv qhov tsim ntawm titanium carbides lossis nitrides, uas tuaj yeem ua rau muaj zog tiv thaiv oxide zaj duab xis.

info-443-448 info-439-441

3.Qhov yog lub hardness ntawm inconel 690?

Lub hardness ntawm inconel 690 feem ntau txiav txim siab los ntawm nwsKev Kho Cua Sov Lub Xeev, raws li nws yog ib tug Austenitic alloy (tsis tau muaj dej nag? Tsis zoo li inconel x750, nws tsis tuaj yeem siv dag zog ntawm kev ua haujlwm kub. Hauv qab no yog cov khoom siv tawv tawv muaj txiaj ntsig rau nws feem ntau cov cua sov {4} urb), rock), pock), lossis Brinell (HB) teev (HB) Nplai (ib ASTM / AMS Cov Qauv):

1. Annealed Mob (Feem Ntau Lub Xeev)

Annealing yog tus qauv kev kho cua sov rau inconel 690, koom nrog cua sov rau 1065-1120℃f) ua raws los ntawm kev txias sai (dej quenching) lossis tswj txias. Lub xeev no ua kom zoo rau corrosion tsis kam thiab ductility, ua rau nws haum rau cov ntawv tseem ceeb tshaj plaws (piv txwv li cov chav dej hluav taws xob lub tshuab hluav taws xob feem ntau).

Rockwell B (HRB): ~ 70 - 80

Brinell (HB): ~ 170 - 200

Rockwell C (HRC): ~<20 (too soft to measure accurately with the HRC scale)

2. Txias -} ua haujlwm mob

Txias ua hauj lwm (piv txwv li, txias lawm, txias kos duab, lossis txias extrusions) Lub xeev no yog siv rau cov ntawv thov uas xav tau kev ua haujlwm zoo dua (piv txwv li} kub} qhov kev ua kom haum corrosion) qhov twg tuaj yeem ua rau muaj kev pom zoo me ntsis.

Hardness qhov tseem ceeb nrog lubDegree ntawm cov khaub thuas txias(piv txwv li, 20%, 40%, lossis 60% txo qis hauv cov thickness):

Lub teeb txias ua haujlwm (20-30% txo): Rockwell B (HRB) ~ 80 - 85; Brinell (HB) ~ 200 - 230

Kev Ua Haujlwm Nruab Nrab Txias (30-50% Txo): Rockwell B (HRB) ~ 85 - 90; Brinell (HB) ~ 230 - 260

Heavy cold work (>50% txo qis): Rockwell B (HRB) ~ 90 - 95; Brinell (HB) ~ 260 - 300; Rockwell C (HRC) ~ 20 - 25

3. Kev ntxhov siab - maj mam dim

Ib qho kev ntxhov siab - pa taws kev kho cua sov (feem ntau 700-90-1650℃f rau kev ua haujlwm txias (uas tuaj yeem ua rau SCC). Cov txheej txheem no tau muag me ntsis cov alloy piv rau lub txias - ua haujlwm lub xeev:

Rockwell B (HRB): ~ 75 - 85 (nyob ntawm qhov chaw txias khaub thuas)

Brinell (HB): ~ 180 - 230