Dab tsi yog A387Gr22CL1 Steel Phaj Ua Raws Li? Kev soj ntsuam ntawm cov tub ntxhais tshuaj muaj pes tsawg leeg thiab cov cuab yeej cuab tam

A387Gr22CL1yog chromium-molybdenum alloy steel phaj nyob rau hauv ASTM A387 tus qauv nrog qib siab dua Gr11, tus yam ntxwv los ntawm kev txhim kho cov ntsiab lus alloying. "Gr22" qhia tias nws cov ntsiab lus chromium (Cr) nce mus txog kwv yees li 2.00%-2.50%, thaum cov ntsiab lus molybdenum (Mo) khaws cia nyob ib ncig ntawm 0.90%-1.10%. Cov ntsiab lus chromium ob npaug coj tau zoo leap, ua rau nws oxidation kuj thiab corrosion kuj-tshwj xeeb tshaj yog tsis kam mus rausiab -kub hydrogen sulfide corrosion-zoo tshaj rau Gr11. Qhov kev nce ntxiv hauv molybdenum cov ntsiab lus zoo heev txhim kho cov hlau siab - qhov kub thiab txias, tsis kam nkag, thiab microstructural stability. Yog li ntawd, Gr22CL1 yog qhov chaw los tiv thaiv qhov nruab nrab hnyav dua - kub thiab siab - qhov chaw siab. Nws qhov kev txwv siab tshaj plaws ntawm qhov kev pabcuam kub yog feem ntau 25-50℃siab dua li ntawm Gr11, ua rau lub sijhawm ntev{15}} haujlwm ruaj khov hauv qhov kub ntawm 454℃txog 566℃. Nws yog ib qho khoom siv tseem ceeb rau kev tsim cov khoom siv hnyav hnyav.

Lub ntsiab kom zoo dua ntawm Gr22CL1 nyob rau hauv nws zoo heev high -kub creep rupture zog. Creep yog hais txog cov yas deformation qeeb ntawm cov ntaub ntawv nyob rau hauv qhov kub thiab txias tas li thiab kev ntxhov siab, uas yog ib qho kev txwv loj hauv kev tsim cov khoom siv kub siab -. Cov ntsiab lus molybdenum siab dua thiab ruaj khov alloy carbides (xws li M7C3, M2C) tsim los ntawm kev sib xyaw ua ke ntawm chromium thiab molybdenum tuaj yeem ua tau zoo pin cov ciam teb thiab cuam tshuam kev txav mus los, yog li txhim kho cov khoom siv nkag siab thiab creep rupture zog txwv. Qhov no txhais tau hais tias nyob rau hauv tib qhov tsim kub thiab siab, siv Gr22CL1 tuaj yeem tsim cov khoom sib zog thiab nyias dua piv rau qis dua - cov ntaub ntawv qib (xws li Gr11), ua tiav qhov hnyav thiab txuag cov khoom. Xwb, nrog tib lub phab ntsa tuab, Gr22CL1 cov cuab yeej tuaj yeem tiv taus kev ua haujlwm siab dua thiab kub, ua tau raws li cov txheej txheem siab dua -piv txwv li, kev siv hauv cov roj liquefaction thiab niaj hnub hydrocracking units.

Tom qab kev kho cua sov (feem ntau normalizing + tempering), Gr22CL1 steel phaj tau ib tug ruaj khov tempered bainite qauv. Txawm li cas los xij, tsis zoo li qis- alloy steels, siab chromium-molybdenum steels (xws li 2.25Cr-1Mo steel) muaj cov yam ntxwv uas yuav tsum tau ua tshwj xeeb-npau taws embrittlement. Qhov no yog hais txog qhov tshwm sim uas qhov cuam tshuam ntawm lub zog ntawm cov hlau txo qis thaum ua haujlwm ntev hauv qhov kub ntawm 375℃txog 575℃lossis txias qeeb los ntawm qhov ntau yam no. Nws tsis yog teeb meem corrosion tab sis yog tshwm sim los ntawm kev sib cais ntawm impurity ntsiab (xws li phosphorus, tin, antimony) ntawm cov ciam teb.

Yog li ntawd, rau Gr22CL1 cov ntaub ntawv, ntxiv rau nruj tswj cov ntsiab lus ntawm impurity ntsiab nyob rau hauv cov hlau (ua high- purity steel daim hlau siv refining technologies xws li nqus degassing), lubTshaj tawm -Kev kho cua sov (PWHT)Thaum lub sij hawm tsim khoom yuav tsum nruj me ntsis tswj lub cua sov / txias tus nqi kom tsis txhob ntev nyob rau hauv lub embrittlement kub ntau yam. Nyob rau tib lub sijhawm, nws qhov kev ntsuas toughness yuav tsum yog raws li cov ntawv xeem uas raug simulated post-weld heat treatment kom ntseeg tau tias cov khoom tseem muaj qhov toughness txaus nyob rau hauv lub xeev kawg tom qab kev tsim khoom.

Vim nws txoj kev ua tau zoo, Gr22CL1 steel phaj tau dhau los ua "tus qauv" cov khoom siv rau ntau cov khoom siv niaj hnub siab - kawg lub zog thiab cov txheej txheem tshuaj.

Nws yog dav siv nyob rau hauv:

1. Loj-muaj peev xwm, siab- hnyavhydroprocessing reactors: tshwj xeeb tshaj yog cov roj hnyav hydrocracking thiab residue hydrotreating reactors, uas ua haujlwm ntawm qhov siab dua, tuav cov xov xwm hnyav dua, thiab muaj zog corrosion.

2. Core thee chemical equipment: xws li coal liquefaction reactors, high-pressure waste heat boilers and shift converters of large-scale high-efficiency the coal gasification units, which face high temperature, high pressure, high hydrogen partial pressure, and syngas corrosion.

3. Loj -thickness siab- cov hlab ntsha siab: Vim Gr22 lub zog siab dua, thaum tsim cov hlab ntsha ultra- tuab- cov hlab ntsha (xws li qee yam khoom siv hauv nuclear fais fab thiab tshuaj teb), nws tuaj yeem txo cov phab ntsa tuab thiab daws cov teeb meem hauv smelting, forging, kev kho cua sov, thiab cov thickness loj.

Hauv cov teb no, kev ua haujlwm ntawm Gr11 tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua, thiab Gr22CL1 tau dhau los ua lub hauv paus rau kev ua kom muaj kev nyab xeeb, ruaj khov, ntev -lub sijhawm, puv -load, thiab ua haujlwm zoo ntawm cov khoom siv.

Xaiv Gr22CL1 txhais tau tias lees txais cov txheej txheem tsim khoom nyuaj dua. Nws weldability yog rhiab heev dua li ntawm Gr11. Siab dua -qib vuam cov ntaub ntawv yuav tsum tau siv, xws li AWS A5.5 E9018-B3L ("B3" sib raug rau Gr22, "L" qhia qhov kub thiab txias toughness).

Lub preheating kub thiab interpass kub tswj yuav tsum nruj me ntsis (feem ntau yuav tsum tsis txhob tsawg tshaj li 200 degree).

Qhov txuas tseem ceeb tshaj plaws yogTshaj tawm -Kev kho cua sov (PWHT), nws cov specifications yog nruj heev: lub tshav kub kev kho mob kub yuav tsum siab tshaj qhov siab tshaj plaws kev pab cuam kub ntawm cov khoom, feem ntau nyob rau hauv ntau yam ntawm 690℃± 14 degree; lub sij hawm tuav yuav tsum raug xam kom raug los xyuas kom muaj kev ntxhov siab txaus kom tsis txhob muaj qhov muag ntau dhau; cov cua kub thiab cua txias yuav tsum tau tswj kom tsis txhob muaj temper embrittlement cheeb tsam thiab tiv thaiv cov tiam tshiab ntawm kev ntxhov siab. Ib qho kev sib txawv ntawm cov txheej txheem yuav ua rau muaj kev sib koom ua ke tsis tsim nyog thiab txawm tias ua tsis tiav thaum ntxov thaum ua haujlwm.

Gr22CL1 yog qib classic uas txuas yav dhau los thiab yav tom ntej hauv chromium-molybdenum steel tsev neeg. Nrog rau kev ua haujlwm thev naus laus zis, txhawm rau ua kom tau txais txiaj ntsig zoo dua, kev txhim kho hom (xws li Gr22Cl.2, Gr24) ntxiv cov kab ke xws li vanadium (V) thiab niobium (Nb) raws li Gr22 tau tshwm sim, muaj qhov zoo dua siab dua -kub lub zog.

Tsis tas li ntawd, kom daws tau qhov teeb meem ntawm temper embrittlement, siab -purity Gr22 nrog cov ntsiab lus tsis zoo (xws li SA-542 Hom D) tau tsim. Gr22CL1 thiab cov ntaub ntawv tshiab no ua ke ua ib qho kev ua ntu zus.

Thaum xaiv, yuav tsum muaj kev ntsuam xyuas kev txawj ntse thiab kev lag luam: rau feem ntau cov tsoos loj - nplai hydroprocessing reactors, Gr22CL1- nrog cov cuab yeej paub tab thiab kev nplua nuj daim ntawv thov - tseem yog ib qho ntawm cov nqi ntau tshaj - kev xaiv zoo. Rau cov khoom siv nrog ultra- kub siab, lub neej tsim ultra-ntev, lossis qhov xav tau hnyav hnyav, tuaj yeem xav txog cov qauv kev txhim kho ntau dua. Nkag siab txog thaj tsam kev ua tau zoo ntawm Gr22CL1 yog qhov yuav tsum tau ua ua ntej rau kev xaiv cov khoom siv tshawb fawb thiab cov cuab yeej siv qib siab tsim.

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