A516 Qib 70yog weldable, thiab cov khoom no tau tsim tshwj xeeb rau vuam. Nws yog siv tshwj xeeb rau hauv qis - thiab nruab nrab - qhov kub siab ntawm cov hlab ntsha. Nws yog siv nyob rau hauv reactors ntawm refineries, txhua kab ntawm cov tshuaj nroj tsuag, deaerators ntawm fais fab nroj tsuag, thiab lub puab tso tsheb hlau luam ntawm ntau LNG cia tank.
Lub ntsiab lus tseem ceeb tshaj plaws: Lub npe tag nrho ntawm ASTM A516 tus qauv yog "Carbon Steel Phaj rau Nruab Nrab- thiab qis-Tsuas Kub Siab Hnyav," thiab nws qhia meej meej tias nws tsim nyog rau fusion vuam.
Tab sis nws tsis yog ib yam khoom uas koj tuaj yeem welding "nrog koj ob lub qhov muag kaw." Koj yuav tsum:
- Paub nws muaj pes tsawg leeg thiab carbon sib npaug
- Xaiv cov khoom siv vuam zoo (tsawg- hom hydrogen- tsis txhob skimp ntawm tus nqi)
- Txiav txim siab seb puas tsim nyog preheating raws li phaj thickness thiab ib puag ncig tej yam kev mob
- Tswj qhov kub ntawm qhov sib tshuam -tsis txhob cia nws siab dhau
- Ua kev tshaj tawm -welding thaum tsim nyog
- Ua cov txheej txheem vuam tsim nyog los txheeb xyuas qhov qis- qhov kub thiab txias cuam tshuam toughness
Hauv kev lag luam ntawm cov hlab ntsha siab, A516 Gr. 70 tau tseem siv tau ntau xyoo lawm yam tsis tau raug txiav tawm, uas yog vim li cas nws thiaj li ntseeg tau. Tsuav koj ua raws li cov lus qhia tshwj xeeb, nws yuav tsis cia koj poob.
Yam teeb meem dab tsi tshwm sim thaum vuam?
Qhov feem ntau tsis xws luag nyob rau hauvA516 Gr . 70yog txias cracking- tawg uas tshwm nyob rau hauv lub tshav kub- cuam tshuam cheeb tsam los yog nyob rau hauv lub hauv paus ntawm weld ob peb teev los yog txawm ob mus rau peb hnub tom qab welding. Cov kab nrib pleb no zoo ib yam li cov hlua ntawm cov plaub hau, tab sis lawv ua tsis tau sai li sai tau thaum lub zog siv.
Peb lub ntsiab ua rau mob khaub thuas tawg yog hydrogen, kev nyuaj siab, thiab hardened microstructure. Koj tuaj yeem daws tag nrho peb los ntawm kev ua kom ntseeg tau tias cov khoom siv vuam vuam tau qhuav kom zoo, ua kom muaj cua sov txaus, tswj qhov kub thiab txias, thiab siv tom qab- vuam cua sov kho nrog kev tswj kom txias thaum tsim nyog.
Lwm qhov teeb meem yog softening lossis embrittlement ntawm tshav kub- cuam tshuam cheeb tsam (HAZ). Thaum cov khoom siv hluav taws xob kub siab dhau lawm, HAZ tuaj yeem tsim cov nplej ntxhib thiab ua nkig, lossis dhau - hnub nyoog thiab softens. Txoj kev daws teeb meem yog los tswj cov cua sov nkag los ntawm kev siv cov khoom me me, nqaim weld hlaws, thiab ntau qhov hla, thiab tsis txhob muaj lub viav vias loj.
Tsis tas li ntawd, kev saib xyuas tshwj xeeb yuav tsum tau them rau qhov qis - qhov kub thiab txias cuam tshuam qhov hnyav ntawm qhov vuam. A516 Gr. 70 feem ntau siv nyob rau hauv ib puag ncig nrog qhov kub thiab txias li ob peb kaum degrees hauv qab xoom. Yog tias cov cua sov nkag rau hauv ib chav tsev ntev dhau lawm, qhov kev cuam tshuam ntawm qhov vuam ntawm -30℃yuav tsis ncav cuag 27 J. Yog li ntawd, thaum ua cov txheej txheem vuam tsim nyog, nws yog ib qho tseem ceeb uas yuav tsum tau ua qhov ntsuas qhov ntsuas kub tsawg; tsis txhob cia siab rau kev ntsuas tensile thiab dabtsi yog khoov.
Cov lus pom zoo
- Yog tias koj yog tus neeg yuav khoom, thaum yuav khoomA516 Gr. 70 steel daim hlau, xyuas qhov tseeb cov nqi sib npaug. Cov pa roj carbon sib npaug tuaj yeem sib txawv ntawm cov hlau mills, yog li sim xaiv cov phaj nrog cov pa roj carbon sib npaug hauv qab 0.43% kom yooj yim vuam.
- Yog tias koj yog ib tug welder, xyuas kom qhuav cov electrodes kom huv si thiab ua kom cov cua sov- tuav lub tog raj kheej kom ncav cuag txhua lub sijhawm. Tsis txhob ntshai siv sij hawm los preheat cov khoom siv - siv rab phom kub los xyuas yog ib puas npaug ntau dua kev ntseeg siab ntawm kev kwv yees.
- Yog tias koj yog tus kws tshuaj xyuas lossis tus kws tshaj lij, nco ntsoov ua kom tiav cov txheej txheem vuam tag nrho, tshwj xeeb tshaj yog qhov kev xeem cuam tshuam. Tsis txhob tos kom txog thaum muaj teeb meem nrog cov khoom los tshuaj xyuas cov txheej txheem -los ntawm qhov ntawd, tus nqi yuav ntau dua.
A516 Gr.70 yog cov khoom siv uas tuaj yeem yooj yim lossis nyuaj, nyob ntawm seb koj saib nws li cas. Tab sis ib yam yog qhov tseeb: tsuav koj ua nws tiag, nws yog ib qho khoom siv zoo.
Thov xa mus rau koj cov txheej txheem vuam specification rau cov txheej txheem tshwj xeeb.
Thib peb -kev tshuaj xyuas tog muaj
