1. Mfundo zoyendetsera ntchito
Tsimikizirani mtundu waposachedwa wa ASTM A333/A 333M (mankhwala omwe adasinthidwa pambuyo pa 2016 asinthidwa, ndipo zoletsa zatsopano monga Cr, Ni, ndi Mo zikuwonjezedwa).
2. Kuwongolera kapangidwe ka mankhwala
Malire ofunikira:
C≤0.30% (kuchepa kwa carbon kumatsimikizira kulimba), Mn 0.29-1.06% (zosinthidwa ndi C content), P≤0.025%, S≤0.025% (kuchepetsa kwambiri zinthu zovulaza).
Mtundu wa 2016 umawonjezera malire apamwamba a Ni, Cr, Mo, ndi zina zotero (monga Ni≤0.40%), ndipo m'pofunika kufufuza ngati bukhu la chitsimikizo likulembedwa ndi carbon equivalent (CET).
Kusintha kwazinthu: Mtundu watsopano wa A333GR6 wasinthidwa kuchoka ku C-Mn chitsulo kupita ku chitsulo chochepa cha alloy, ndikuchita bwino.
1. Makina katundu
Kulimba kwamphamvu ≥415MPa, kutulutsa mphamvu ≥240MPa, chiŵerengero cha mphamvu zokolola zochepa (zowonetsera luso la pulasitiki)
Mayeso otsika kutentha:
Kutentha kwa mayeso kumasiyanasiyana ndi makulidwe a khoma (monga -45 ℃~-52 ℃), ndipo zofunikira za mgwirizano ziyenera kunenedwa momveka bwino.
Mphamvu yamphamvu yamphamvu iyenera kukumana ndi muyezo, womwe nthawi zambiri umafunika ≥20J (onani ASTM A333 kuti mudziwe zambiri).
2. Metallographic dongosolo
Malo operekera ayenera kukhala yunifolomu ferrite + pearlite, ndi kukula kwa tirigu 7 ~ 9 (mbewu zouma zimatha kuchepetsa chiŵerengero cha mphamvu zokolola).
Makamaka sankhani mapaipi achitsulo omwe adazimitsidwa + kupsya mtima (mapangidwewo ndi owuma troostite, ndipo kulimba kwa kutentha kumakhala bwino).
Kutentha mankhwala ndondomeko
Zolemba zochizira kutentha ziyenera kuperekedwa: kutenthetsa ≥815℃→ kuzimitsa madzi→kuwotcha kuti zitsimikizire kufanana kwa kapangidwe kake.
Pewani chikhalidwe choyambirira chosasamalidwa kapena chosasamalidwa bwino (mawonekedwe owoneka bwino amabweretsa kuwonongeka kwa kutentha).
Mkhalidwe wotumizira
Nthawi zambiri zimaperekedwa muzokhazikika + zaukali kapena kuzimitsidwa + kupsya mtima, zomwe ziyenera kufotokozedwa mu mgwirizano.
1. Makulidwe a khoma ndi kulumikizana kwa kutentha komwe kumakhudza
Mwachitsanzo: pamene makulidwe a khoma ndi 7.62mm, kutentha kwa mayeso kumafunika kufika -52 ℃ (otsika kuposa -45 ℃).
Zodziwika bwino za malo: 8-1240mm×1-200mm (SCH5S-XXS), zofunikira zenizeni ziyenera kufufuzidwa.
2. Zofanana ndi zina
A333GR6≈X42N/L290N/API 5L B PSL2 (chitoliro chamzere), koma ndikofunikira kutsimikizira ngati kutentha kwatsika kumakwaniritsidwa.
Muyenera kuyang'ana zolemba
certification Material (MTC), lipoti la chithandizo cha kutentha, lipoti loyesa kutentha pang'ono, lipoti loyesa lopanda zowononga (UT/RT).
Pambuyo pa mtundu wa 2016, deta yoyesera ya zinthu zatsopano zomwe zawonjezeredwa (Ni, Cr, etc.) ziyenera kuphatikizidwa.
Kuwunikanso kwa chipani chachitatu
Ndikoyenera kuti muyang'anenso zinthu zofunika kwambiri (monga kuyesa mphamvu, kapangidwe kake) potengera zitsanzo, makamaka pazachiwopsezo chachikulu (monga mapaipi a LNG).
Kutentha kosiyanasiyana
Kutentha kopangidwa kogwirira ntchito ≥-45℃, zochitika zotsika kwambiri (monga -195℃) ziyenera kuwunika ngati giredi yapamwamba (monga A333GR3/GR8) ikufunika.
Ntchito yamakampani
Petrochemical (ethylene, LNG), zipangizo firiji, mapaipi cryogenic, etc., ayenera kuganizira chitetezo zina (monga ❖ kuyanika) malinga ndi corrosiveness wa sing'anga.
Ziyeneretso ndi ntchito
Sankhani opanga omwe ali ndi ziyeneretso zopanga za ASTM A333, ndipo amafunikira milandu yoperekera ntchito zofananira.
Chenjerani ndi machitidwe a amalonda a "OEM" ndikutsimikizira zikalata zoyambirira za chitsimikizo cha fakitale.
Mtengo ndi nthawi yobweretsera
Mtundu wa alloy otsika (chisanafike 2016) ukhoza kukhala ndi mtengo wotsika, koma kusiyana kwa magwiridwe antchito ndikwambiri, ndipo magwiridwe antchito amafunikira.
Mafotokozedwe apadera (monga mipope ya mipanda yokhuthala m'mimba mwake) angafunikire kusinthidwa mwamakonda, kukulitsa nthawi yoperekera.
Chiwopsezo chosokoneza: Osasokoneza A333GR6 ndi A335GR6 (chromium-molybdenum chitsulo cha kutentha kwambiri).
Zosungira zakale: Tsimikizirani ngati chitoliro chachitsulo chimapangidwa pambuyo pa mtundu wa 2016 kuti mupewe ma aloyi azinthu zakale zomwe sizikukwaniritsa miyezo.
Njira yowotcherera: Kuwotcherera kwachitsulo chotsika kutentha kumafunikira zida zofananira zowotcherera (monga ENiCrMo-3), ndipo wogulitsa azipereka chitsogozo chowotcherera.
Kupyolera mu mfundo zomwe zili pamwambazi, wogula akhoza kuwunika mwadongosolo kutsatiridwa, kufanana kwa magwiridwe antchito ndi kudalirika kwa omwe amapereka aloyi ya A333GR6 kuti atsimikizire chitetezo ndi chuma cha polojekitiyi.
Nthawi yotumiza: Jun-12-2025
