1. Dab tsi yog cov ntsiab lus tseem ceeb thiab cov khoom tseem ceeb ntawm AH550 steel yeeb nkab?
AH550 yog ib chav kawm a ultra {{1} high- lub zog HULL qauv txheej txheem hauv GB / T 712-2023 tus qauv. Nws cov khoom tseem ceeb muaj xws li:
Paib lub zog ntau dua los yog sib npaug rau 550 MPa, tensile muaj zog 670}} kev sib cav sib ceg thiab cov chaw txawb nkoj;
Qis - kub cuam tshuam todness (KV2 ntau dua lossis sib npaug ntawm 34 4}}) degree, ntsib cov kev cai ntawm cov khoom muaj dej tsawg;
Qhov sib npaug ntawm lub zog siab thiab weldability yog tiav los ntawm nb {{v} ti microalloying thiab tswj kev txias (TMCP) txheej txheem.
2. Dab tsi yog cov ntawv thov ntawm AH550 steel hlau?
Ultra - loj back bitting: piv txwv li, lub decks thiab sab plating ntawm 35} {}}} bearing chaw.
Cov roj deepater thiab cov khoom siv roj: kom high {{0} {luas lib ceg thiab cantilever tws ntawm semi- submicible drilling platforms.
Cov dej noo: piv txwv li, cov khoom lag luam hauv fullos (Floating Ntau Lawm Cia thiab Kev Tawm Khoom), kev hloov pauv mus rau feem ntau cov chaw xa khoom.
3. Dab tsi txhim kho kev txhim kho AH550 kev muab piv rau AH500?
Muaj zog dua: tawm los lub zog nce ntxiv los ntawm 500 MPa rau 550 MPa, ua rau muaj qhov hnyav txo qis.
Viav Vuam Ua Haujlwm: Tsawg Carbon sib npaug tsim (CEV Tsawg dua lossis sib npaug nrog 0.50%) txo qhov kev pheej hmoo ntawm kev pheej hmoo ntawm kev pheej hmoo ntawm kev kub ntxhov ntawm high {1} Helds.
Kev lag luam efficiency: nyob rau hauv tib lub load, siv cov kev siv tau tuaj yeem raug txo los ntawm kwv yees li 10% piv rau AH500, txo tus nqi.
4. Cov ntsiab lus tseem ceeb yuav tsum tau txiav txim siab thaum ua thiab vuam ah550 steel yeeb nkab? Cov txheej txheem vuam: Tsawg - hydrogen mroadodes (xws li muaj qhov pom zoo ntawm 140-180℃(siab dua rau phaj tuab> 30mm).
Kev tswj kev txias tswj: Ib tug khoov cov vojvoog ntawm ntau dua lossis sib npaug ntawm 4 zaug ntawm phab ntsa tuab yog pom zoo kom tsis txhob muaj kev txhawj xeeb txias thiab microcracks.
Tshaj tawm - Weld Schacele: 100% Uld kuaj (ut) thiab nqus cov ntsuas kev sib nqus (MT) yog rau cov tseem ceeb.
5. Yuav ua li cas ah550 steel yeeb nkab kuaj xyuas? Dab tsi yog cov ntsuas kev soj ntsuam tseem ceeb? Cim pov thawj: Cov yeeb nkab Steel yuav tsum tau cim nrog "Ah550," tus lej GB / T 712 tus lej, thiab cov ntaub ntawv cov ntaub ntawv.
Kev Kuaj Xyuas: Daim Ntawv Pov Thawj Cov Ntaub Ntawv (MTC) yuav tsum muaj:
Tshuaj lom neeg tshuaj lom neeg (piv txwv li, C tsawg dua lossis sib npaug ntawm 0.18%, mn tsawg dua los yog sib npaug nrog 1.80%);
Cov cuab yeej ua lwm yam (tawm lub zog ntau dua lossis sib npaug nrog 550 MPa, tensile muaj zog 670-830 MPA);
-20℃cuam tshuam cov ntaub ntawv (nruab nrab ntawm peb cov quav loj dua los yog sib npaug rau 34 j, ib qho hnoos qeev ntau dua lossis sib npaug rau 24 j);
Tsis - Kev sim ua txhaum: UT / MT / MT / RT ntsuas los yog tshuaj ntsuam xyuas los yog ua raws li kev xav tau.
