** 1. Dab tsi yog API 5CT L80 sib npaug rau? **
API 5CT L80 yog cov qib tshwj xeeb txhais tau los ntawm Asmeskas Petroleum lub koom haum (API) tshwj xeeb rau casing thiab tubing. Nws tsis yog qhov ncaj qha 1 -- {14} Kuv zoo heev rau Aisi 4140 lossis 4330 hloov kho vanadium steel. Nws cov yam ntxwv tseem ceeb yog qhov tsawg kawg ntawm lub zog ntawm 80,000 PSI thiab kev tswj hwm lub hardness thiab tshwj xeeb muaj kev pab cuam hydrogen sulfide). Yog li ntawd, thaum nrhiav cov khoom uas muaj cov khoom sib xws, cov kws ua choj feem ntau xa mus rau cov roj muaj zog Alloy zoo li 4140 uas tau ua kom sov ua kom tiav tib lub zog thiab qib nyuaj.
** 2. Yuav ua li cas txheeb xyuas tus qauv hlau? **
Txheeb xyuas tus qauv ntawm tus qauv hlau ua ntej feem ntau yuav tsum muaj kev sib xyaw ua ke:
* ** Qhov kev ntsuas tshuaj: ** Qhov no yog qhov tseeb tshaj plaws. Cov tswv yim zoo li cov kev hloov kho kho qhov muag (oes) lossis x-}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}} Cov khoom siv tshuaj lom neeg los txiav txim siab rau cov qauv kev qhia.
* ** Kev kuaj xyuas neeg kho tshuab: ** Cov kev ntsuam xyuas zoo li lub zog tensile muaj zog, lees lub zog (rockwell lossis brinell) tau ua. Cov txiaj ntsig tau muab piv rau cov khoom paub mechanical ntawm cov qauv qib kom pom qhov sib phim.
* ** TSHUAJ TSHUAJ TEEB MEEM: ** RAU COV TAG NRHO COV TAG NRHO YUAV TSUM TAU KEV PAB CUAM THIAB SIA SAIB LUB CAIJ NTUJ NO, XIM LOS XEEM COV TSWV YIM ZOO THIAB ALTOY TSEV. Qhov no tsis yog meej rau cov neeg hlau alloy.
* ** Cim cim thiab cov xim xim: ** Ntau cov khoom siv steel, cov kab hlau tshwj xeeb, tau ntaus cim nrog tus qauv xim rau cov cim kev yooj yim.
** 3. 4 chav kawm ntawm steel yog dab tsi? **
Hlau yog feem ntau tau muab cais ua plaub pawg tseem ceeb raws li nws cov tshuaj lom neeg:
* ** Cov ntaub pua nyias: ** Cov no yog hom feem ntau, feem ntau tsim ntawm cov hlau thiab carbon, nrog qee cov me me ntawm lwm cov khoom. Lawv tau muab faib rau hauv qis, nruab nrab, thiab cov pa hlau siab.
* ** COV TXHUA YAM: ** Cov ntsiab lus muaj lwm cov khoom siv chromium (zoo li chromium, molybdenum, harmyning, hnav tsis kam, thiab corrosion tsis kam.
* ** Cov hlau stainless: ** Cov no yog txhais los ntawm lub siab chromium cov ntsiab lus (feem ntau ib yam nkaus los ntawm 10.5%) uas muab rau lawv zoo nkauj corrosion thiab oxidation tsis kam. Hom hom muaj xws li Austenic (piv txwv li, 304), Ferritic, thiab Martensitic.
* ** Qhov no yog chav kawm ntawm kev nyuaj heev, hnav {- Cov hlau tiv taus tshwj xeeb rau kev ua cov cuab yeej, tuag, thiab cov khoom txiav. Lawv feem ntau siab siab- carbon, siab-}} alloy alleoy ecoy (piv txwv li D2, A2, O1).
** 4. Dab tsi yog qib 5 hlau? **
"Qib 5" feem ntau yog hais txog chav kawm ntawm siab-}}}}} }ານ {, txhais tau los ntawm AQUM A574 lossis SAE J429 tus qauv. Ib qeb 5 ntsia liaj qhov rooj yog ua los ntawm cov pa roj carbon steel uas tau quenched thiab tempered. Nws tau txheeb xyuas los ntawm peb kab radial ntawm lub ntsia liaj qhov taub. Nws cov cuab yeej tseem ceeb yog qhov tsawg kawg nkaus tensile lub zog ntawm 120,000 psi. Nws yog ib qho tseem ceeb kom tsis txhob ntseeg qhov no nrog lwm cov kev muab qhab nia uas tseem siv tau tus lej "5".
** 5. Tus qib hlau twg muaj zog tshaj? **
"Lub zog uas muaj zog tshaj plaws" yog lub zog ua tau tuaj yeem xa mus rau lub zog tensile, lossis nws nyob ntawm cov txheej txheem kev kho cua sov. Txawm li cas los xij, ib chav kawm muaj zog tshaj plaws ntawm cov qib steel muaj yog ** cov hlau steel ** (piv txwv li, qib 18NI (18NI (350)). These are low-carbon, high-alloy steels that obtain exceptional strength (with tensile strengths reaching 2,400 to 3,500 MPa or 350,000+ psi) and toughness through a special aging heat treatment, not through carbon content. Rau kev sib piv, ib qho khoom siv nyuaj heev xws li D2 tej zaum yuav muaj kev nyuaj tab sis yuav ntau dua nkig.
