Dab tsi yog cov khoom thiab kev siv ntawm A387 Qib 22 Chav Kawm 1 Hlau?
A387 Qib 22 Chav Kawm 1yog ib tug normalized chromium-molybdenum alloy steel phaj (2.25% Cr, 1% Mo) tsim rau siab - kub, siab - siab welded siab hlab ntsha. Muab nyob rau hauv normalized los yog kev ntxhov siab-relieved mob, nws yog npaj rau fabrications qhov twg lub tiav lawm nkoj yuav undergo ib tug tag nrho Post-Weld Heat Treatment (PWHT) los txhim kho nws zaum kawg tempered microstructure, kev nyuaj siab, thiab zoo txhua yam khoom rau hnyav kev pab cuam, xws li nyob rau hauv hydrocracker reactors thiab high{8} ib puag ncig.
Cov khoom ntawm A387 Qib 22 Chav Kawm 1 Hlau:
A387 Qib 22 Chav Kawm 1 yog 2.25% Chromium - 1% Molybdenum alloy steel phaj nkag rau hauv qhov normalized lossis kev ntxhov siab-relieved tshav kub kho mob. Qhov no "mos" raws li -muab lub xeev yog tsim los rau tom ntej fabrication thiab kev kho cua sov. Nws cov chemical muaj pes tsawg leeg muab:
Zoo heev - qhov kub thiab txias tsis kam, zoo dua rau qib 11 alloys.
Kev tiv thaiv zoo tshaj plaws rau hydrogen nres thiab siab -kub oxidation (txog ~ 600 ° C / 1110 ° F), raws li Nelson Curve cov lus qhia.
High hardenability, yuav tsum nruj tswj ntawm vuam thiab kev kho cua sov kom tsis txhob tawg thiab ua tiav qhov xav tau toughness.
Zoo formability nyob rau hauv nws normalized mob, tab sis nws yuav tsum tau mus rau ib tug zaum kawg Post-Weld Thaum tshav kub kub kho (PWHT) tom qab fabrication los tsim nws cov khoom zoo.
Daim ntawv thov ntawm A387 Qib 22 Chav Kawm 1 Hlau:
Cov khoom siv no tau teev tseg rau qhov hnyav - kev pabcuam, siab - kub, thiab siab - siab welded siab hlab ntsha, feem ntau qhov uas cov txheej txheem fabrication tso cai rau tag nrho lub nkoj PWHT:
Petroleum Refining: Cov reactors tseem ceeb hauv hydrocracking, hydrodesulfurization (HDS), thiab hydrotreating units ua haujlwm nyob rau hauv siab -siab hydrogen.
Fais fab Generation: High-siab boiler Cheebtsam (piv txwv li, chav nruas, headers) nyob rau hauv advanced fossil fuels thiab tshav kub rov qab systems.
Tshuaj & Petrochemical: Reactors thiab cov hlab ntsha raug aggressive siab -kub thiab siab -hydrogen ib nrab siab ib puag ncig.
Nws yog qhov kev xaiv zoo tshaj plaws rau cov khoom loj lossis cov ntaub ntawv nyuaj (xws li, hnyav- cov phab ntsa reactors) qhov twg tag nrho cov hlab ntsha ua tiav tuaj yeem raug kho thermally hauv lub cub tawg kom ntseeg tau tias cov khoom sib xws thiab kev ntxhov siab.
Tshuaj muaj pes tsawg leeg ntawm A387 Qib 22 Chav Kawm 1 (%)
| Element | Min - Max |
|---|---|
| Cov pa roj carbon (C) | 0.05-0.15 Nws |
| Manganese (Mn) | 0.30-0.60 Nws |
| Silicon (Si) | 0.50 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 |
Chromium thiab Molybdenum suav nrog raws li qib 22 tus qauv (1.88–2.62% Cr, 0.85–1.15% Mo), txhim kho oxidation tsis kam, siab - kub lub zog, thiab corrosion kuj.
Lwm yam me me alloying ntsiab yog tswj los xyuas kom meej weldability, toughness, thiab seem stability.
Mechanical Properties of A387 Qib 22 Chav Kawm 1
| Khoom | Tus nqi | Chav tsev |
|---|---|---|
| Tensile zog | 60–85 : kuv | KSI / 415 - 585 MPa |
| Yield zog | 30 | ksi / 205 MPa |
| Elongation | 18 | % |
| Impact Test | xaiv tau | Raws li kev xav tau |
Chav Kawm 1 daim hlau ua tau raws li cov txheej txheem siab ntawm lub nkoj siv tshuab thiab tsim nyog rau kev ua haujlwm siab - qhov kub thiab txias qhov cuam tshuam rau qhov kub thiab txias tsis tseem ceeb.
Vim Li Cas Xaiv Chav Kawm 1 Dhau Chav Kawm 2 rau Qib 22?
Chav Kawm 1 raug xaiv thaum txoj kev tsim khoom suav nrog kev tsim kub, kev sib txuas dav dav, thiab qhov kawg ntawm lub qhov cub PWHT. Lub voj voog thermal ua tiav no tso cai rau tus neeg tsim khoom los hloov cov phaj ib txwm ua tiav rau hauv cov khoom tiav nrog lub siab tempered, tawv microstructure, zoo rau qhov xav tau tshaj plaws ntawm - siab hydrogen thiab siab - cov kev pabcuam kub. Nws yog "fabrication-tus phooj ywg" daim ntawv ntawm no siab -kev ua tau zoo alloy.
1. Cov xwm txheej "Class 2" cuam tshuam li cas rau cov txheej txheem vuam rau A387 Qib 11?
Lo lus nug no tshawb txog qhov ua tau zoo ntawm kev siv cov khoom siv pre-tempered Class 2, tsom rau cov kev hloov kho tshwj xeeb uas xav tau rau preheat, interpass kub, thiab Post-Weld Heat Treatment (PWHT) piv rau Chav Kawm 1.
2. Dab tsi yog qhov tsis zoo ntawm kev qhia A387 Qib 11 Chav Kawm 2 dhau Chav Kawm 1?
Cov lus nug no tshawb xyuas qhov muaj peev xwm ua lag luam tawm -tawm, xws li tus nqi siab dua, tsis yooj yim rau kev tsim kub tom qab, lossis kev pheej hmoo ntawm cov khoom puas tsuaj yog tias tsis raug PWHT raug siv rau cov cua sov uas twb muaj lawm - cov phaj kho.
3. Nyob rau hauv daim ntawv thov tshwj xeeb twg yog A387 Qib 11 Chav Kawm 2 qhov yuav tsum tau ua lossis kev xaiv?
Lo lus nug no nrhiav kev txheeb xyuas cov xwm txheej engineering uas qhov siab dua li - xa lub zog thiab ua ntej - kho microstructure ntawm Chav Kawm 2 muab qhov txiaj ntsig tseem ceeb, xws li hauv kev kho cov phiaj xwm lossis rau cov khoom siv uas lub nkoj puv PWHT ua tsis tau.
4. Yuav tsum tswj hwm dab tsi thaum lub sij hawm PWHT ntawm cov khoom siv hauv chav kawm 2 los tiv thaiv kev kub ntxhov?
Lo lus nug no hais txog qhov kev pheej hmoo tseem ceeb: ua kom ntseeg tau tias qhov yuav tsum tau tshaj tawm -weld stress relief tsis txo qis cov txiaj ntsig thiab tensile lub zog ntawm lub hauv paus hlau hauv qab qhov tsawg kawg nkaus qhov tseem ceeb rau Chav Kawm 2.
5. Qhov cuam tshuam rau qhov hnyav ntawm Chav Kawm 2 piv rau Chav Kawm 1 li cas tom qab tsim kom raug?
Cov lus nug no sib piv cov kev pabcuam zaum kawg ntawm ob chav kawm, tshuaj xyuas seb cov kev tsim khoom sib txawv ua rau muaj qhov sib txawv tseem ceeb hauv kev puas tsuaj ntawm kev ua haujlwm kub.
Tag nrho cov specification thiab cov ntsiab lus muaj nyob rau ntawm kev thov. Cov ntaub ntawv saum toj no yog muab rau kev taw qhia nkaus xwb. Rau kev tsim tshwj xeeb thov hu rau peb cov neeg ua haujlwm muag khoom.
