1. Cov qauv kev coj ua
Paub meej tias qhov tseeb version ntawm ASTM A333 / A 333M (cov tshuaj muaj pes tsawg leeg ntawm lub version tom qab 2016 tau hloov kho, thiab cov kev txwv tshiab xws li Cr, Ni, thiab Mo ntxiv).
2. Tshuaj muaj pes tsawg leeg tswj
Cov ntsiab lus tseem ceeb txwv:
C≤0.30% (cov pa roj carbon tsawg ua kom muaj zog), Mn 0.29-1.06% (hloov nrog C cov ntsiab lus), P≤0.025%, S≤0.025% ( nruj me ntsis txwv cov khoom tsis zoo).
2016 version ntxiv cov kev txwv siab tshaj rau Ni, Cr, Mo, thiab lwm yam (xws li Ni≤0.40%), thiab nws yuav tsum tau xyuas seb phau ntawv lav puas tau cim nrog carbon sib npaug (CET).
Cov khoom siv hloov kho tshiab: A333GR6 tshiab tau hloov kho los ntawm C-Mn steel mus rau cov hlau tsis tshua muaj hlau, nrog kev ua haujlwm zoo dua.
1. Mechanical zog
Tensile zog ≥415MPa, yield zog ≥240MPa, tsis tshua muaj yield zog piv (xav txog cov yas deformation muaj peev xwm)
Tsawg kub cuam tshuam kuaj:
Qhov ntsuas kub sib txawv nrog cov phab ntsa tuab (xws li -45 ℃ ~ -52 ℃), thiab cov ntawv cog lus yuav tsum tau hais kom meej.
Tus nqi hluav taws xob cuam tshuam yuav tsum ua tau raws li tus qauv, feem ntau xav tau ≥20J (saib rau ASTM A333 kom paub meej).
2. Metallographic qauv
Lub xeev cov khoom siv yuav tsum yog cov ferrite + pearlite, nrog rau cov nplej loj ntawm 7 ~ 9 (cov nplej ntxhib tuaj yeem txo cov txiaj ntsig ntawm qhov sib piv).
Zoo dua xaiv cov kav hlau uas tau quenched + tempered (cov qauv yog tempered troostite, thiab qhov kub-kub toughness yog zoo dua).
Kev kho cua sov txheej txheem
Cov ntaub ntawv kho cua sov yuav tsum tau muab: cua sov ≥815 ℃ → dej quenching → tempering los xyuas kom meej qhov sib xws ntawm cov qauv.
Zam kom tsis txhob kho lossis kho tsis raug raws li lub xeev qub (cov qauv ntxhib ua rau qis-kub brittleness).
Kev xa khoom raws li txoj cai
Feem ntau xa hauv normalized + tempered lossis quenched + tempered lub xeev, uas yuav tsum tau teev nyob rau hauv daim ntawv cog lus.
1. Phab ntsa thickness thiab cuam tshuam kub correlation
Piv txwv li: thaum phab ntsa thickness yog 7.62 hli, qhov cuam tshuam qhov ntsuas kub yuav tsum ncav cuag -52 ℃ (qis dua tus qauv -45 ℃).
Cov chaw tshwj xeeb: 8-1240mm × 1-200mm (SCH5S-XXS), qhov xav tau tiag tiag yuav tsum tau kuaj xyuas.
2. Cov khoom siv sib npaug
A333GR6≈X42N/L290N/API 5L B PSL2 (kab yeeb nkab), tab sis nws yog ib qho tsim nyog kom paub meej tias qhov kev ua tau zoo ntawm qhov kub thiab txias.
Yuav tsum kuaj cov ntaub ntawv
Cov ntaub ntawv pov thawj (MTC), daim ntawv qhia txog kev kho cua sov, daim ntawv qhia txog qhov ntsuas kub tsis tshua muaj kev cuam tshuam, tsis muaj kev puas tsuaj (UT / RT).
Tom qab xyoo 2016, cov ntaub ntawv xeem ntawm cov khoom siv tshiab tshiab ntxiv (Ni, Cr, thiab lwm yam) yuav tsum suav nrog.
Thib peb rov kuaj xyuas dua
Nws raug nquahu kom rov tshuaj xyuas cov khoom tseem ceeb (xws li kev sim cuam tshuam, tshuaj lom neeg muaj pes tsawg leeg) los ntawm kev ua piv txwv, tshwj xeeb tshaj yog rau cov ntawv thov kev pheej hmoo siab (xws li LNG kav dej).
Qhov kub thiab txias
Tsim kev khiav hauj lwm kub ≥-45 ℃, ultra-low kub scenarios (xws li -195 ℃) yuav tsum tau soj ntsuam seb puas yuav tsum tau ib qib siab dua (xws li A333GR3 / GR8) yuav tsum tau.
Daim ntawv thov kev lag luam
Petrochemical (ethylene, LNG), cov khoom siv tub yees, cov kav dej cryogenic, thiab lwm yam, yuav tsum xav txog kev tiv thaiv ntxiv (xws li txheej) raws li qhov nruab nrab corrosiveness.
Kev tsim nyog thiab kev ua haujlwm
Nyiam xaiv cov tuam txhab tsim khoom nrog ASTM A333 cov khoom tsim nyog, thiab xav tau cov khoom siv rau cov haujlwm zoo sib xws.
Ceev faj ntawm cov tub luam 'OEM' tus cwj pwm thiab xyuas cov ntaub ntawv pov thawj ntawm lub Hoobkas.
Nqe thiab lub sijhawm khoom xa tuaj
Qhov qis-alloy version (ua ntej 2016) tej zaum yuav muaj tus nqi qis dua, tab sis qhov kev ua tau zoo sib txawv yog qhov loj, thiab kev ua tau zoo ntawm cov nqi yuav tsum tau ua.
Tshwj xeeb specifications (xws li loj-inch tuab-walled kav) yuav tsum tau customized, ncua lub sij hawm xa tuaj.
Kev pheej hmoo tsis meej pem: Tsis txhob yuam kev A333GR6 nrog A335GR6 (chromium-molybdenum hlau rau kub).
Cov khoom qub qub: Paub meej tias cov yeeb nkab steel yog tsim los tom qab xyoo 2016 version kom tsis txhob muaj cov hlau alloy ntawm cov khoom qub qub tsis ua raws li cov qauv.
Vuam txheej txheem: Tsawg-kub steel yeeb nkab vuam yuav tsum muaj cov khoom siv vuam sib xws (xws li ENiCrMo-3), thiab tus neeg muag khoom yuav tsum muab cov kev taw qhia vuam.
Los ntawm cov ntsiab lus saum toj no, tus neeg yuav khoom tuaj yeem ntsuas qhov ua raws, kev ua tau zoo sib xws thiab kev ntseeg siab ntawm cov khoom siv A333GR6 alloy yeeb nkab kom ntseeg tau tias kev nyab xeeb thiab kev lag luam ntawm qhov project.
Post lub sij hawm: Jun-12-2025
