{{0 {}} api 5l x70 yog lub siab-zog tsawg-alloy pipeline cov khoom siv hauv cov liaj teb xws li roj thiab roj kev thauj mus los.
2.} Txheem Txhais
API 5L X70 yog qhov kev tsim qauv hauv API spec 5L pipeline theem lub zog (API)} {}}} {{8}
3.}}}} cov tshuaj lom neeg
Cov ntsiab lus tseem ceeb ntawm cov qib no muaj carbon, mancese, chromium thiab vanadium, thiab yog ua tib zoo tswj kom tau txais cov neeg kho tshuab uas xav tau {}}
Cov pa roj carbon (c): Ua rau muaj lub zog ntawm cov hlau . hauv API 5L X70, cov pa roj carbon ntau yog ib txwm nyob nruab nrab 0}} 06% thiab 0.12%.
Manganese (MN): Qhov nyiaj ntxiv yog feem ntau yog 1 {}} 2%, uas tuaj yeem tsim kev tsim cov ferrite, li kev txhim kho cov tawv thiab lub zog.
Chromium (CR): Cov ntsiab lus yog feem ntau 0 . 2% lossis tsawg dua, uas txhim kho kev ua kom muaj carbides thiab txhawb kev daws teeb meem zog.
Molybdenum (mo): Cov ntsiab lus yog nruab nrab ntawm 0 {. 1%, uas txhim kho cov tshuaj carbides thiab kev txhawb nqa cov tshuaj muaj zog, tshwj xeeb yog qhov kub tsawg.
Niobium (nb) thiab vanadium (v): cov ntsiab lus yog hais txog 0 {}}}}}}}}}}}}}}}} Vanadium cov ntawv Vagadium caradium carbides, uas ua rau muaj kev kub ntxhov.
Lwm cov ntsiab lus: xws li silicon, phosphorus thiab leej faj yog me ntsis tswj tau los txo cov khoom tsis zoo ntawm cov khoom siv hluav taws xob thiab weldability {}}}}
4.} Cov Khoom Siv Neeg Kho Tshuab
Lub zog
Tus qauv tsim nyog yam tsawg kawg tau meej meej lub zog yog 70,000}}}}}}}}} {6 mpa {9.
Lub zog tensile yog feem ntau 82,000}}}}}}}}}}}}}}}}}} .
Kev muaj zog
Cov khoom ua pov thawj zoo heev kev cuam tshuam nyuaj, qhov tseem ceeb rau nrog kev thauj khoom sai thiab poob siab yam tsis muaj kev puas tsuaj .
Charpy V-Motch Kev Cuam Tshuam Lub Zog Yuav Tsum Muaj Hluav Taws Xob Kom Yooj Yim rau Kev Ua Haujlwm Zoo rau Kev Ua Haujlwm Zoo rau Kev Ua Haujlwm Zoo rau Kev Ua Haujlwm (}
Ductility thiab tawg tsis kam
Elongation muaj nuj nqis feem ntau yog li ntawm 18% thiab 22%, qhia txog cov hlau muaj peev xwm deform plastically ua ntej pob txha lov.
Kev nyuaj siab muaj nuj nqis feem ntau yog nruab nrab ntawm 22 thiab 28 teev (rockwell hardness), kom tiv thaiv cov txheej txheem kev ua tau zoo thiab ua kom tsis txhob muaj zog thiab ua haujlwm, thiab txij nkawm4.
5.} Cov txheej txheem tsim khoom
API 5L X70 hlau feem ntau yog tsim nyob rau hauv ob peb kauj ruam los xyuas kom cov tshuaj muaj feem xav tau, micrerttructure thiab cov khoom siv tau ua tiav:
Steelmaking: Ua ntej, ib lub billet lossis slab nrog cov tshuaj lom neeg tshwj xeeb yog tsim los ntawm cov rauv oxygen (EAF) steelmaking txheej txheem .
Kub Rolling: Cov Slab lossis Billet yog Kub Rolled, cov txheej txheem uas yog qhov tsim nyog thiab muab cov roj ntsha uas xav tau thiab muab cov roj hmab uas ntxim nyiam thiab cov hlaws lossis cov txiv plig lossis txiv plig lossis cov hlaws lossis cov txiv mojlub
Pipemaking: Lub kub-dov lossis kub-kho steel ntawv lossis coil yog tsim rau cov txiv txheej txheem (xws li reepitudinal vuam lossis muab kauv vuam).
Kev Tswj Xyuas Zoo: thoob plaws kev tsim khoom lag luam, kev sim ua kom zoo li ultrasonic kuaj, sib nqus particle kev sim, thiab cov kav hlau partic
6.} Daim Ntawv Thov
API 5L X70 cov khoom siv tseem ceeb hauv kev thauj khoom roj thiab roj kev thauj mus los, nws tseem ceeb heev rau hauv nroog loj, nws tseem yog kev lag luam muaj roj ntsha, nws kuj yog kev lag luam tshuaj lom neeg thiab lwm cov lus.
