Chemical zikuchokera

Gr.3: Kaboni wokhutira ≤0.19%, silicon okhutira 0.18% -0.37%, manganese 0.31% -0.64%, phosphorous ndi sulfure okhutira ≤0.025%, komanso lili 3.18% -3.82% faifi tambala.

GR

Zimango katundu

Gr.3: mphamvu zamakokedwe ≥450MPa, zokolola mphamvu ≥240MPa, elongation ≥30% longitudinally, ≥20% transversely, otsika zotsatira kutentha kutentha ndi -150 ° F (-100 ° C).

GR

Njira yopanga

Kusungunula: Gwiritsani ntchito ng'anjo yamagetsi kapena chosinthira ndi zida zina kuti muchotse oxidize, chotsani slag ndi aloyi chitsulo chosungunuka kuti mupeze Chitsulo Choyera.

Kugudubuza: Lowetsani chitsulo chosungunula mu chubu chogudubuza mphero kuti mugubuduze, pang'onopang'ono kuchepetsa kukula kwa chubu ndikupeza makulidwe ofunikira a khoma, ndipo nthawi yomweyo, yosalala pamwamba pa chubu chachitsulo.

Kuzizira kozizira: Kupyolera mu kuzizira kozizira monga kujambula kozizira kapena kugudubuza kozizira, kulondola ndi khalidwe lapamwamba la chubu lachitsulo likhoza kupititsidwa patsogolo.

Chithandizo cha kutentha: Nthawi zambiri, imaperekedwa muzokhazikika kapena kukhazikika komanso kutenthetsa kuti athetse kupsinjika kotsalira mkati mwa chubu chachitsulo ndikuwongolera magwiridwe antchito ake.

Malo ogwiritsira ntchito

Petrochemical: Ntchito kupanga otsika kutentha kuthamanga chotengera mapaipi ndi otsika kutentha exchanger mapaipi m'minda ya mafuta, makampani mankhwala, etc., amene angathe kukwaniritsa zofunika ntchito m'madera otsika kutentha, monga liquefied gasi Natural gasi yosungirako akasinja, otsika kutentha mapaipi kufala, etc.

Gasi Wachilengedwe: Oyenera mapaipi otumizira gasi ndi matanki osungira gasi ndi zida zina kuti zitsimikizire kuti zikuyenda bwino m'malo otentha kwambiri.

Magawo ena: Amagwiritsidwanso ntchito mu mphamvu, zakuthambo, ndi zomanga zombo, monga zida zazikulu zamapangidwe a condensers, boilers ndi zida zina mu zida zamagetsi, komanso zida zazikulu zamakina a hydraulic system, mafuta amafuta ndi zida zina m'munda wamlengalenga.

Mafotokozedwe ndi miyeso

Mafotokozedwe wamba ndi miyeso ndi osiyanasiyana, monga m'mimba mwake akunja 21.3-711mm, khoma makulidwe 2-120mm, etc.
Gr.6 chitoliro chopanda chitsulo, makamaka ASTM A333/A333M GR.6 kapena SA-333/SA333M GR.6chitoliro chachitsulo chosasunthika chotsika kutentha, ndi chinthu chofunika kwambiri cha mafakitale, chomwe chimagwiritsidwa ntchito nthawi zosiyanasiyana chomwe chimafuna kulimba kwa kutentha kochepa komanso mphamvu zambiri. Zotsatirazi ndikuyambitsa mwatsatanetsatane kwa chitoliro chachitsulo cha Gr.6:

1. Miyezo yoyendetsera ntchito ndi zida

Miyezo yogwiritsiridwa ntchito: Gr.6 yopanda zitsulo zopangira zida za ASTM A333/A333M kapena ASME SA-333/SA333M, zomwe zimaperekedwa ndi American Society for Testing and Materials (ASTM) ndi American Society of Mechanical Engineers (ASME) ndipo zimagwiritsidwa ntchito makamaka pofotokoza zofunikira zaukadaulo zamapaipi otsika ndi zitsulo zosasunthika.

Zofunika: Chitoliro chachitsulo cha Gr.6 chosasunthika ndi chitoliro chachitsulo chopanda faifi chotsika, chomwe chimagwiritsa ntchito chitsulo cholimba cha aluminium-deoxidized low-grained low-temperature, chomwe chimatchedwanso chitsulo chopha aluminiyamu. Mapangidwe ake a metallographic ndi thupi-centered kiyubiki ferrite.

2. Mankhwala opangidwa

Kapangidwe kakemidwe ka chitoliro kopanda chitsulo cha Gr.6 kumaphatikizapo:

Mpweya (C): Zomwe zili ndi zochepa, nthawi zambiri sizidutsa 0.30%, zomwe zimathandiza kuchepetsa kuphulika kwachitsulo.

Manganese (Mn): Zomwe zili pakati pa 0.29% ndi 1.06%, zomwe zingapangitse mphamvu ndi kulimba kwachitsulo.

Silicon (Si): Zomwe zili pakati pa 0.10% ndi 0.37%, zomwe zimathandiza kuti zitsulo zowonongeka zikhale zowonongeka ndipo zimatha kuwonjezera mphamvu zachitsulo pamlingo wina.

Phosphorus (P) ndi sulfure (S): Monga zinthu zodetsa, zomwe zili ndi malire, nthawi zambiri osapitirira 0,025%, chifukwa phosphorous ndi sulfure zimachepetsa kulimba ndi kutsekemera kwachitsulo.

Zinthu zina zophatikizika: monga chromium (Cr), faifi tambala (Ni), molybdenum (Mo), ndi zina zotero, zomwe zili nazo zimawongoleredwa pamlingo wochepa kuti zitsimikizire kutentha kwapansi komanso magwiridwe antchito azitsulo.

3. Makina katundu

Chitoliro chopanda chitsulo cha Gr.6 chili ndi makina abwino kwambiri, makamaka kuphatikiza:

Mphamvu zolimba: Nthawi zambiri pakati pa 415 ndi 655 MPa, zomwe zimatsimikizira kuti chitoliro chachitsulo chimatha kusunga umphumphu ndi kuteteza kuphulika pamene akupanikizika.

Mphamvu zokolola: Mtengo wocheperako ndi pafupifupi 240 MPa (ukhozanso kufika kupitirira 200 MPa), kotero kuti sudzatulutsa mapindikidwe ochulukirapo pansi pa mphamvu zina zakunja.

Elongation: osachepera 30%, zomwe zikutanthauza kuti chitoliro chachitsulo chimakhala ndi luso la pulasitiki lopindika ndipo limatha kupanga mapindikidwe ena popanda kusweka akatambasulidwa ndi mphamvu yakunja. Izi ndizofunikira kwambiri kuti zigwiritsidwe ntchito m'malo otsika kutentha, chifukwa kutentha kochepa kungapangitse kuti zinthuzo zikhale zowonongeka, ndipo pulasitiki yabwino ikhoza kuchepetsa chiopsezo cha embrittlement yotere.

Kulimba kwamphamvu: Pakutentha kotsika (monga -45 ° C), mphamvu yakukhudzidwa iyenera kukwaniritsa zofunikira zina mwa manambala kudzera pakutsimikizira kuyesedwa kwa Charpy kuwonetsetsa kuti chitoliro chachitsulo sichingaphwanyike chifukwa cha kutentha kochepa.