Tus txheej txheem tseem ceeb tswj A515 Qib 70 yog dab tsi?

A515 Qib 70yog cov pa roj carbon steel phaj teev nyob rau hauv ASTM A515 / ASME SA515, feem ntau yog siv rau nruab nrab - mus rau siab - kub siab siab siv nkoj; "Qib 70" qhia qhov tsawg kawg nkaus tensile lub zog ntawm 70 ksi (txog 485 MPa), thiab nws muaj nuj nqis rau nws zoo weldability, lub zog, thiab kub tsis kam nyob rau hauv kev lag luam xws li roj thiab roj, lub zog tsim, thiab petrochemical ua.

Tshuaj muaj pes tsawg leeg ntawm ASTM A515 Qib 70

Mechanical Properties ntawm ASTM A515 Qib 70

daim ntawv thov

ASTM A515 GR.70 yog dav siv hauv kev lag luam uas xav tau cov ntaub ntawv muaj zog rau siab - kub thiab siab - qhov chaw siab. Cov ntawv thov uas muaj xws li:

Boilers thiab Presses Vessels:

Zoo tagnrho rau fabricating boilers thiab siab hlab ntsha vim nws siab tensile zog thiab tshav kub kuj.

Thaum tshav kub kub Exchangers:

Siv nyob rau hauv cov khoom siv hluav taws xob sib hloov kom ua tau zoo hloov hluav taws xob nyob rau hauv qhov kub siab.

Lub zog tiam:

Ua haujlwm nyob rau hauv cov chaw tsim hluav taws xob rau cov khoom raug rau qhov kub thiab txias.

Kev lag luam Petrochemical:

Tsim nyog rau lub tank cia thiab cov cuab yeej ua haujlwm hauv cov nroj tsuag petrochemical.

Kev kho mob

1. Kev kho cua sov

Cov txheej txheem kev cai rau kev kho cua sov nyob ntawm lub phaj thickness:

Thickness Tsawg dua los yog sib npaug li 2 nti. (50 mm): Feem ntau muab nyob rau hauv raws li -rolled mob tab sis tuaj yeem raug txiav kom normalized, kev ntxhov siab-relieved, los yog ob qho tib si.

Thickness > 2 nyob rau hauv. (50 mm): Yuav tsum tau normalized los kho cov qauv lis thiab txhim kho txhua yam khoom.

Cov Txheej Txheem Ntxiv: Nyob ntawm cov neeg siv khoom xav tau, thev naus laus zis xws li annealing, normalizing ntxiv rau tempering, lossis quenching thiab tempering (kom nce hardness thiab toughness) yuav raug siv.

2. Vuam txheej txheem

ASTM A515 Gr. 70 muaj qhov zoo weldability thiab tuaj yeem ua tiav siv cov qauv txheej txheem:

Hom Kev Siv: SMAW (stick), GTAW/TIG, GMAW/MIG, thiab SAW (submerged arc).

Consumables: Tsawg-hydrogen electrodes zoo li E-7018 raug pom zoo.

Preheat & Post-Weld Heat Treatment (PWHT): Rau qhov hnyav, ua ntej- cua sov thiab PWHT (kev ntxhov siab) raug qhia kom tiv thaiv kev tawg thiab tswj qhov tawv.

3. Tsim thiab Machining

Cold forming: Yooj yim khoov lossis txias - tsim los siv cov lus pom zoo vim nws qhov ductility zoo.

Kev Ua Haujlwm Kub: tuaj yeem ua haujlwm kub-; forging yog feem ntau ua ntawm 1800℃F thiab 2350℃F.

Machinability: Sib piv rau cov pa roj carbon steels (piv txwv li, AISI 1330).

4. Kev kho deg

Cov phaj feem ntau xa nrog kub - dov oxide lossis nplai.

Kev xaiv kev kho mob suav nrog kev tua blasting, pickling, thiab pleev xim / txheej los tiv thaiv corrosion.

Vim li cas thiaj xaiv peb:
Koj tuaj yeem tau txais cov khoom zoo meej raws li qhov koj xav tau ntawm tus nqi tsawg kawg nkaus.

Peb kuj muab Reworks, FOB, CFR, CIF, thiab qhov rooj rau qhov rooj tus nqi xa khoom. Peb xav kom koj ua deal rau shipping uas yuav zoo heev.

Cov ntaub ntawv uas peb muab yog muaj tseeb tiag, txoj cai los ntawm raw cov ntaub ntawv xeem daim ntawv pov thawj mus rau qhov kawg dimensional nqe lus.

Peb lav muab cov lus teb tsis pub dhau 24 teev (feem ntau hauv tib lub sijhawm)

Koj tuaj yeem tau txais cov khoom hloov pauv, zeb xa khoom nrog txo lub sijhawm tsim khoom.

Peb tau mob siab rau peb cov neeg siv khoom. Yog tias nws yuav tsis tuaj yeem ua tau raws li koj cov kev xav tau tom qab kuaj xyuas tag nrho cov kev xaiv, peb yuav tsis ntxias koj los ntawm kev cog lus tsis tseeb uas yuav tsim kev sib raug zoo rau cov neeg siv khoom.

Hu rau tam sim no

Tiv tauj peb ntawm beam@gneesteelgroup.com rau tus nqi, kev txhawb nqa, lossis kev daws teeb meem. Peb yeej ib txwm npaj los txhawb koj qhov project.

Lub hom phiaj ntawm LF rauv refining hauv A515 Qib 70 yog dab tsi?

LF (ladle furnace) refining txhim kho steel huv si los ntawm slag refining, kho tshuaj muaj pes tsawg leeg, thiab tswj molten steel kub stability.

Vim li cas VD lub tshuab nqus tsev degassing siv qee qhov A515 Qib 70 ntau lawm?

VD (lub tshuab nqus tsev degassing) txo cov roj cov ntsiab lus (xws li hydrogen, oxygen) hauv cov hlau molten, txo cov kev puas tsuaj sab hauv thiab txhim kho cov hlau sab hauv purity thiab txhua yam ruaj khov.

Dab tsi ntawm qhov chaw raug tshem tawm thaum lub sij hawm A515 Qib 70 slab tu?

Cov khoom tsis xws luag xws li oxide nplai, cov kab nrib pleb, khawb, thiab cov txheej txheem sib cais raug tshem tawm los ntawm kev sib tsoo, sib tsoo, lossis tua blasting.

Txoj kev tshuaj xyuas dab tsi yog siv rau A515 Qib 70 daim hlau tiav?

Cov txheej txheem feem ntau suav nrog kev tshuaj xyuas qhov ntev, kev tshuaj xyuas qhov muag, kuaj ultrasonic (UT) rau qhov tsis xws luag sab hauv, kev ntsuas tensile, kev ntsuam xyuas cuam tshuam, thiab kev sim hardness.

Dab tsi yog qhov siab tshaj plaws ntawm A515 Qib 70 daim hlau rau ASTM A515?

Nws tuaj yeem muab tau txog li 8 ntiv tes (203 hli) tuab, nrog rau cov cuab yeej tshwj xeeb yuav tsum tau hloov kho rau cov ntu tuab.

A515 Qib 70 puas tuaj yeem welded?

Yog lawm. Nws yog tsim los rau cov qauv welded thiab muaj qhov zoo weldability thaum cov txheej txheem vuam zoo (xws li, preheating, post-kev kho cua sov) ua raws.

Qhov txawv ntawm A515 Qib 70 thiab A516 Qib 70 yog dab tsi?

A515 yog rau boiler thiab siab lub nkoj daim hlau siv nyob rau nruab nrab / siab kub, thaum A516 muaj stricter tej yam toughness yuav tsum tau thiab yog haum rau qis dua - kub kev pab cuam.

Dab tsi yog txheej txheem tsim khoom feem ntau siv rau A515 Qib 70 daim hlau?

Teb: Cov txheej txheem raug suav nrog melting (BOF), refining (LF / VD), nruam casting, reheating, tswj dov, kev kho cua sov (yog tias xav tau), descaling, thiab tshuaj xyuas.