API 5L X52Q:
"Q" feem ntau yog rau "quenched thiab tempered". Hom yeeb nkab no yog quenched thiab tempered thaum lub sij hawm tsim khoom. Tom qab quenching thiab tempering, lub zog tawm los thiab lub zog tensile tuaj yeem ua tau raws li qhov xav tau ntawm lub zog siab.
Cov txheej txheem quenching thiab tempering tuaj yeem kho cov nplej thiab txhim kho lub zog thiab toughness ntawm cov khoom. Nws qhov tsawg kawg nkaus tawm lub zog tuaj yeem ncav cuag li 360MPa, thiab lub zog tensile yog li 460MPa. Nws tuaj yeem tiv taus lub siab loj thiab nruj rau qee qhov thiab ua tau zoo nyob rau hauv qhov chaw muaj kev kub ntxhov.
Thaum lub sij hawm vuam, vim yog quenching thiab tempering, nws cov txheej txheem vuam yuav tsum tau xav txog qhov kev hloov pauv ntawm qhov kub ntawm qhov chaw cuam tshuam. Thaum lub sij hawm welding, lub vuam cua sov input yuav tsum tau nruj me ntsis tswj kom tsis txhob muaj qhov txo qis hauv lub zog thiab toughness vim qhov kev hloov ntawm cov qauv ntawm cov cua sov cheeb tsam.
API 5L X52N: "N" sawv rau "normalized". Qhov no txhais tau hais tias cov yeeb nkab tau normalized. Hais txog cov tshuaj muaj pes tsawg leeg, nws yuav tsum ua kom tau raws li qhov tseem ceeb muaj pes tsawg leeg ntawm API 5L X52.
Lub zog tawm los thiab lub zog tensile tom qab normalizing kuj tuaj yeem ua tau raws li API 5L X52 Tus qauv ntawm normalizing, tab sis nws cov yam ntxwv ntawm lub zog yuav txawv me ntsis ntawm cov quenching thiab tempering. Normalizing yog tsuas yog los txhim kho lub koom haum ntawm cov khoom siv thiab ua kom nws zoo ib yam.
Lub vuam kev ua tau zoo nyob rau hauv lub xeev normalized yog kuj yooj yim los tswj. Vim tias lub koom haum cov qauv tom qab normalizing yog ntau yam sib xws, qhov kev hloov pauv ntawm lub tshav kub cuam tshuam cheeb tsam thaum vuam yog me me. Txawm li cas los xij, nws tseem yuav tsum tau ua haujlwm raws li cov txheej txheem vuam cov txheej txheem thiab xaiv cov khoom siv vuam tsim nyog thiab tsis ua kom ntseeg tau qhov vuam zoo.
API 5L X52 Hochtemperatur-Leitungsrohr
