Cov tawv ntoo hlau tau tsim nws tus kheej ua ib tus neeg muab kev ntseeg siab ntawm cov ntaub ntawv zoo thiab cov kev daws teeb meem tshaj 20 xyoo. Nrog rau kev cog lus rau kev ua tau zoo, cov tuam txhab caters kom muaj ntau yam kev lag luam, muab cov kev pab cuam kom tau raws li cov kev xav tau tshwj xeeb. Lawv cov lus nug, uas suav nrog cov hwm Astm A335 P91 hom 2 cov ntaub ntawv, yog kev pom zoo los ntawm kev pom zoo thoob ntiaj teb cov qauv sib txuas lus zoo. P91 Cov ntaub ntawv tshwj xeeb hauv kev muab cov ntaub ntawv P91 rau cov kav dej siab, suav nrog cov xaij, cov neeg siv hluav taws, thiab ntau dua, ua kom cov khoom lag luam kom tau txais cov khoom lag luam zoo tshaj plaws.

Standars tuaj yeem muab los ntawm cov tsev ua haujlwm hlau:

A335 Chrome Moly kav

A335 Alloy Steel Kav

A335 p5 alloy steel kav

A335 P9 Alloy Hlau Kav Hlau

A335 P11 Alloy Steel Kav

A335 P12 Alloy Hlau Kav Hlau

A335 P22 Alloy Steel Kav

A335 P91 Alloy Steel Kav

Cov yam ntxwv tseem ceeb ntawm ASTM A335 P91 hom 2 leeg
ASTM A335 P91 hom 2 yog lub chrome-moly alloy steel paub txog nws lub zog tshwj xeeb, qhov kub tsis kam, thiab lub zog txias. Nws tau cais raws li lub zog loj-txhim kho ferritic (csef) hlau, ua rau nws zoo tagnrho rau kev ntsuas kub thiab cov kev siv siab. Cov khoom cuam tshuam rau txheej txheem kho cua sov:

Li cas los ntawm 1050 ° C.

Cua txias rau 200 ° C.

Tempering ntawm 760 ° C.

Cov txheej txheem no txhim kho nws lub zog sib txawv thiab kav ntev, ua rau nws xaiv zoo dua rau cov chaw thov.

Muaj pes muaj pes tsawg leeg thiab cov txiaj ntsig ntawm Astm A335 P91 Cov Tub Hlau Hlau
Chromium (9%): Txhim kho kom muaj zog kub siab, oxidation tsis kam, thiab cov khoom siv neeg kho tshuab.

Molybdenum (1%): Txhim kho elasticity, hnav tsis kam, thiab muaj lub zog tob tob.

Vanadium thiab Columbium / Niobium: Ntxiv rau txhim kho lub zog thiab cua sov ua kom tsis kam.

Qhov Zoo Ntawm Astm A335 P91 Hlau Tubes
Txo cov phab ntsa tuab: tso cai rau cov khoom sib txuas, txo lub sijhawm vuam, thiab sau cov hlau tsawg dua.

Ntau dua thermal qaug zog lub neej: txog li 10 zaug zoo dua li cov neeg ua ntej zoo li T22 lossis P22.

Nce kev ua haujlwm kub: Txhim kho kev ua tau zoo nyob hauv cov ntawv thov kub-ntsuas kub.

Cov ntawv thov ntawm Astm A335 P91 Cov Tub Hlau Hlau
P91 tau dav siv nyob rau hauv kev lag luam uas xav tau cov ntaub ntawv muaj peev xwm nrog nrog kev kub ntxhov thiab ntsuas. Cov ntawv thov feem muaj xws li:

Lub zog loj: Boilers, rov xyaum cov kab ncig ua ke.

Petrochemical Nroj Tsuag: tso cua sov, roj ua roj, thiab cov kev pabcuam roj av.

Cov tshuab ntsuas hluav taws xob kub siab: haum rau khoov, flanging, thiab vuam ua haujlwm.

Tshuaj lom neeg muaj pes tsawg leeg ntawm Astm A335 P91 Cov Tub Hlau Hlau
Cov tshuaj lom neeg muaj pes tsawg leeg ntawm P91 kom nws ua tau zoo tshaj:

Carbon: 0.08% - 0.12%

Manganese: 0.30% - 0.60%

Chromium: 8.00% - 9.50%

Molybdenum: 0.85% - 1.05%

Vanadium: 0.18% - 0.25%

Nitrogen: 0.030% - 0.070%

Lwm cov ntsiab lus: npib tsib xee, Aluminium, Columbium, Titanium, thiab zirconium hauv kev tswj hwm nyiaj.

Cov Khoom Siv Neeg Kho Tshuab
Lub zog tensile: yam tsawg kawg 85,000 psi (585 mpa).

Tos lub zog: Yam tsawg kawg 60,000 psi (415 MPA).

Vuam thiab Kev Kho Mob Cua Sov Astm A335 P91 Hlau Tubes
Vuam P91 Yuav tsum nruj dua cov txheej txheem tswj hwm nws cov khoom:

Preheating: qhov tseem ceeb los tiv thaiv kom txhob muaj hydrogen-inducts cracking.

Kev Ntsuas Kub Kev Tswj Kub: Tswj kev siv cov cua sov hauv nruab nrab.

Tom qab kev kho cua sov-weld (duab): Tseem ceeb rau ua kom tiav cov tswv yim microstructure thiab zam tsis tau.

Vuam Electrodes: Yuav tsum phim niam txiv cov ntaub ntawv muaj pes tsawg leeg.

Vim li cas thiaj xaiv cov hmoov av hlau ASTM A335 P91 Cov Hlau Hlau?
Cov khoom lag luam dav: Cov ntaub ntawv zoo P91 rau txhua yam koj xav tau.

Cov kev tshaj lij: Pab neeg muaj kev paub los coj koj los ntawm kev xaiv cov ntaub ntawv thiab cov ntawv thov.

Kev Cog Lus rau Zoo: tsuas yog cov ntaub ntawv zoo tshaj plaws los ntawm kev pom zoo cov tuam ntxhab.

Rau tag nrho koj cov AVTM A335 P91 hom 2 yuav tsum tau, hu rau Hom Tswv Hlau Steel niaj hnub no. Lawv pab neeg tau npaj txhij los muab cov kev daws teeb meem uas tshaj qhov koj xav tau thiab xa cov ntaub ntawv zoo tshaj plaws rau koj cov haujlwm.