Puas yog A 387 Gr 11 CL 1 carbon steel lossis hlau alloy?

A387 Qib 11 Chav Kawm 1yog chromium-molybdenum alloy steel phaj tau teev tseg raws li tus qauv ASTM A387, dav siv hauv kev tsim cov hlab ntsha siab thiab cov khoom siv boiler uas ua haujlwm ntawm qhov kub siab. Nws belongs rau tsev neeg ntawm tsawg- alloy steels uas muaj ib tug nruab nrab ntawm chromium thiab molybdenum, uas imparts zoo zog, creep tsis kam, thiab tsis kam mus rau hydrogen nres nyob rau hauv siab - kub kev pab cuam ib puag ncig. Chav Kawm 1 qhia txog kev kho cua sov zoo li qub thiab ua kom sov, ua rau muaj kev ua kom zoo nkauj microstructure uas sib npaug toughness thiab lub zog rau kev txhim khu kev qha nyob rau hauv thermal thiab mechanical stress.

daim ntawv thov

Cov hlab ntsha thiab boilers

Siv nyob rau hauv fabrication ntawm siab hlab ntsha, boilers, thiab lwm yam Cheebtsam uas ua hauj lwm nyob rau hauv high kub thiab pressures, qhov twg zoo creep kuj thiab lub zog tuav yuav tsum tau.

Cov khoom siv roj refinery

Siv nyob rau hauv refinery units xws li reactors, tshav kub exchangers, thiab piping systems uas lis kub hydrocarbons thiab cov txheej txheem kua.

Petrochemical thiab chemical processing

Siv nyob rau hauv reactors, kem, thiab kub exchangers nyob rau hauv petrochemical thiab tshuaj nroj tsuag, tshwj xeeb tshaj yog nyob rau hauv cov kev pab cuam uas muaj qhov kub thiab txias thiab hydrogen{0}} muaj ib puag ncig.

Fais fab tuag systems

Pom muaj nyob rau hauv cov khoom siv hluav taws xob, suav nrog cov boilers, lub tshuab hluav taws xob, thiab cov khoom sib txuas, qhov uas tiv taus siab -kub oxidation thiab creep yog qhov tseem ceeb.

Lwm cov khoom siv ua haujlwm kub -

Siv rau hauv ntau daim ntawv thov kev lag luam uas xav tau cov ntawv hlau nrog cov qib siab zoo - qhov kub thiab txias thiab tiv thaiv hydrogen nres, xws li hauv qee cov txheej txheem cua sov thiab cov khoom siv rauv.

qhov zoo

Zoo siab - qhov kub thiab txias

Khaws lub zog tseem ceeb ntawm qhov kub thiab txias, ua rau nws haum rau kev ua haujlwm ntev - nyob rau hauv qhov kub thiab txias.

Resistance rau creep

Cov khoom pov thawj tau txhim kho kev tiv thaiv rau creep deformation, cov cuab yeej tseem ceeb rau cov khoom siv ua haujlwm ntawm qhov kub siab tshaj lub sijhawm ntev.

Tsis kam rau hydrogen nres

Cov chromium-molybdenum alloying muab kev tiv thaiv zoo dua rau hydrogen-induced kev puas tsuaj nyob rau hauv siab -kub hydrogen- muaj ib puag ncig.

Favorable toughness thiab ductility

Kev kho cua sov kom zoo ua rau muaj qhov sib npaug ntawm qhov tawv thiab ductility, pab tiv thaiv kev ua tsis tiav hauv thermal thiab mechanical stress.

Weldability thiab fabricability

Feem ntau suav tias yog weldable nrog cov txheej txheem tsim nyog, tso cai rau kev tsim cov hlab ntsha loj thiab nyuaj thiab cov qauv.

Pov thawj kev ua tau zoo hauv kev lag luam

Muaj keeb kwm ntev ntawm kev siv txhim khu kev qha hauv refineries, petrochemical nroj tsuag, thiab cov chaw tsim hluav taws xob, ua kom pom kev ua tau zoo ib yam hauv kev xav tau kev pabcuam.

kev khiav dej num

1. Kev tshuaj xyuas cov khoom & kev npaj

Kev Tshawb Fawb: Paub meej tias Daim Ntawv Pov Thawj Zeb Xeem (MTC) ua raws li ASTM A387 / A387M tus qauv. Chav Kawm 1 yuav tsum muaj Tensile Strength ntawm 60–85 ksi (415–585 MPa).

Txiav: CNC nplaim taws lossis Plasma txiav yog siv.

Preheating: Nws raug pom zoo kom preheat lub phaj rau 100-150℃ua ntej thermal txiav kom tsis txhob ntug tawg vim cov khoom hardenability.

2. Kev sib sau (Cov lossis kub)

Cold forming: Muaj feem xyuam rau daim hlau nyias. Yog hais tias tus kab mob ntau tshaj 5%, yuav tsum tau muaj kev ntxhov siab tom qab los yog kev kho cua sov.

Kub txoj kev: Feem ntau ua ntawm 900℃thiab 1050 degree. Yog tias qhov kub thiab txias poob qis dua qhov hloov pauv thaum lub sijhawm tsim, tag nrho Normalizing thiab Tempering (N + T) lub voj voog yuav tsum tau rov ua dua los kho cov khoom siv kho tshuab.

3. Cov txheej txheem vuam (theem tseem ceeb)

A387 Gr 11 yog rhiab heev rau ncua kev tawg.

Preheating: Yuav tsum muaj qhov tsawg kawg nkaus preheat kub ntawm 150℃txog 250℃nyob ntawm thickness.

Interpass Kub: Yuav tsum tau tswj ntawm 150℃thiab 300 degree.

Tom qab- Cua sov (Dehydrogenation): Tam sim ntawd tom qab vuam, ua kom sov qhov sib koom ua ke rau 300-350℃rau 2-4 teev kom cia hydrogen khiav tawm, tom qab ntawd maj mam txias.

4. Kev kho cua sov

Cov khoom siv yuav tsum nyob rau hauv qhov Normalized thiab Tempered kom ua tau raws li Class 1 specifications:

Normalizing: Kub rau 900-950 degree, ces cua txias.

Tempering: Qhov ntsuas kub tsawg kawg yog 620℃(1150℃F).

Tom qab- Kev Kho Hniav Kub Kub (PWHT): Txhawm rau txo qhov kev ntxhov siab nyob hauv lub nkoj, PWHT feem ntau ua ntawm 650℃txog 700℃.

5. NDT & Kev Tswj Xyuas Zoo

Tsis yog-Kev Ntsuas Kev Puas Tsuaj (NDT): 100% Radiographic Testing (RT) lossis Ultrasonic Testing (UT) ntawm txhua qhov siab- khaws cov welds.

Kev Ntsuas Hardness: Lub hardness ntawm vuam thiab Heat Affected Zone (HAZ) feem ntau txwv tsis pub tsawg dua los yog sib npaug li 225 HBW kom ntseeg tau tias ductility thiab tiv thaiv kev ntxhov siab corrosion cracking.

Mechanical Testing: Cov kev ntsuam xyuas cuam tshuam thiab kev ntsuas tensile feem ntau ua rau ntawm "Cov Ntawv Cog Lus Tshaj Tawm" uas tau dhau los ntawm Simulated PWHT (SPWHT) lub voj voog.

Hu rau tam sim no

Yog xav paub ntxiv txog GNEE cov khoom siv hlau, tiv tauj peb ntawm beam@gneesteelgroup.com. Peb tos ntsoov yuav ua haujlwm nrog koj.

Qhov txawv ntawm A 387 Gr 11 CL 1 thiab A 387 Gr 12 CL 1 yog dab tsi?

Qhov sib txawv tseem ceeb yog cov ntsiab lus molybdenum: Gr 11 CL 1 muaj 0.45-0.65% Mo, thaum Gr 12 CL 1 muaj 0.87-1.13% Mo. Gr 12 CL 1 muaj qhov zoo dua qhov kub thiab txias tsis kam, tab sis kim dua.

A 387 Gr 11 CL 1 puas tuaj yeem hloov nrog A 516 Gr 70?

Tsuas yog rau qis -kub lossis ambient- cov ntawv thov kub. A 516 Gr 70 yog cov pa roj carbon steel uas tsis zoo siab - qhov kub thiab txias, yog li nws tsis tuaj yeem hloov A 387 Gr 11 CL 1 hauv siab - kev pabcuam kub.

Puas yog qhov txias txias ua tau rau A 387 Gr 11 CL 1?

Yog lawm, nws tuaj yeem ua tau txias, tab sis nws muaj zog ntau dua li carbon steel, yog li tsim kom muaj zog ntau dua. Nws raug nquahu kom ua kev sib sau ntawm chav tsev kub thiab tsis txhob deformation ntau dhau los tiv thaiv kev tawg.

Lub hom phiaj ntawm post-weld heat treatment (PWHT) rau A 387 Gr 11 CL 1 yog dab tsi?

PWHT txo qis qhov seem vuam kev nyuaj siab, txhim kho qhov toughness thiab ductility ntawm qhov sib koom ua ke, tshem tawm hydrogen-induced cracking, thiab txhim kho cov khoom tiv thaiv kev ntxhov siab corrosion tawg ntawm qhov kub siab.

Dab tsi yog cov ntawv thov tseem ceeb ntawm A 387 Gr 11 CL 1?

Nws yog dav siv nyob rau hauv kev tsim cov hlab ntsha siab, boilers, tshav kub exchangers, thiab petrochemical khoom uas ua hauj lwm nyob rau hauv siab kub, xws li refinery reactors, chav generators, thiab catalytic crackers.

Qhov kev pabcuam siab tshaj plaws rau A 387 Gr 11 CL 1 yog dab tsi?

Nws qhov siab tshaj plaws kev pabcuam kub kub yog kwv yees li 593℃(1100℃F). Tshaj li qhov ntsuas kub no, nws cov creep thiab oxidation kuj poob qis heev.

A 387 Gr 11 CL 1 puas tuaj yeem siv rau hauv qhov chaw qis -qhov kub thiab txias?

Nws tsis yog qhov zoo tshaj plaws rau kev ua haujlwm kub qis (qis dua -20℃/-}4℃F) vim tias nws qhov cuam tshuam toughness txo qis ntawm qhov kub thiab txias, ua rau muaj kev pheej hmoo ntawm pob txha tawg. Rau cov ntawv thov kub qis, lwm cov qib zoo li A516 Gr 70 lossis cov hlau tsis tshua muaj kub yog qhov nyiam.

Qhov ntsuas kub cuam tshuam li cas rau cov khoom siv kho tshuab ntawm A 387 Gr 11 CL 1?

Ntawm qhov kub siab (txog 593℃/ 1100℃F), nws khaws zoo tensile zog, nkag siab, thiab qaug zog piv rau carbon steel. Tshaj qhov kub no, nws cov khoom maj mam degrade.

Brinell hardness (HB) ntau ntawm A 387 Gr 11 CL 1 yog dab tsi?

Brinell hardness ntau yam yog 130-180 HB, uas qhia txog nws cov hardness nruab nrab thiab machinability.

Puas yog A 387 Gr 11 CL 1 resistant rau corrosion?

Nws muaj nruab nrab corrosion kuj nyob rau hauv atmospheric thiab me me corrosive ib puag ncig. Txawm li cas los xij, nws tsis haum rau cov xov xwm muaj zog corrosive (piv txwv li, acids, alkalis) tshwj tsis yog tias muaj kev tiv thaiv ntxiv (xws li, txheej, cladding) yog siv.

Dab tsi yog qhov yuav tsum tau muaj ntawv pov thawj rau A 387 Gr 11 CL 1 daim hlau?

Cov phaj yuav tsum tau ntawv pov thawj raws li ASME SA-387, suav nrog cov ntaub ntawv xeem cov ntaub ntawv (MTRs) nrog cov tshuaj muaj pes tsawg leeg, cov khoom siv kho tshuab, thiab cov ntaub ntawv kho cua sov. Kev tshuaj xyuas thib peb (piv txwv li, ABS, DNV) tej zaum yuav xav tau rau cov ntawv thov tseem ceeb.

Dab tsi yog qhov tuab tuab ntawm A 387 Gr 11 CL 1 daim hlau?

Tus qauv thickness ntau yog 6 hli mus rau 200 hli (0.24 nti rau 7.87 nti). Cov phaj tuab tuaj yeem muaj nyob rau ntawm kev thov tab sis xav tau kev kho cua sov tshwj xeeb kom ntseeg tau tias cov khoom siv tsis sib xws.