1. Ngā āhuatanga mahi, ngā whakamahinga me ngā horopaki e tika ana
Ko te SA302GrB he pereti maitai koranu kaha-teitei, he konukōre iti-konumohe, nō te paerewa ASTM A302, ā, he mea hanga mō ngā taputapu pāmahana-teitei me te pēhanga-teitei pērā i ngā oko pēhanga me ngā poiha. Ko ōna āhuatanga mahi matua ko:
Ngā āhuatanga hangarau tino pai: te kaha kume ≥550 MPa, te kaha hua ≥345 MPa, te roa ≥18%, ā, ko te pakari pānga e tutuki ana i te paerewa ASTM A20.
He pai te mahi whakarewa: e tautoko ana i te whakarewa ā-ringa, te whakarewa ā-ruku, te whakarewa ā-hau me ētahi atu tukanga, ā, me whakamahana me te whakamahana i muri i te whakarewa hei ārai i ngā pakaru.
Ātete pāmahana teitei me te ātete waikura: Ka noho pumau i roto i te awhe pāmahana mahi mai i te -20℃ ki te 450℃, he pai mō ngā taiao waikura pēnei i te waikawa me te kawakore.
Māmā, kaha hoki: Mā te hoahoa whakarewa iti, me te whakaiti i te taumaha o te hanganga, ka pai ake te kaha pupuri pehanga, ā, ka whakaitihia te utu hanga taputapu.
Ngā āhuatanga e tika ana: ngā taputapu matua i roto i ngā mara o ngā matū hinu, ngā kohua tipu hiko, ngā tipu hiko karihi, te whakaputa hiko wai, me ētahi atu, pērā i ngā tauhohenga, ngā whakawhiti wera, ngā tāke porowhita, ngā oko pēhanga tauhohenga karihi, ngā pahu kohua, me ētahi atu.
2. Ngā wāhanga matua, ngā tawhā mahi me ngā āhuatanga miihini
Te hanganga matū (tātari rewa):
C (waro): ≤0.25% (≤0.20% ina matotoru ≤25mm)
Mn (konupora): 1.07%-1.62% (1.15%-1.50% ina ≤25mm te matotoru)
P (whākawa): ≤0.035% (ko ētahi paerewa e hiahia ana kia ≤0.025%)
S (whanariki): ≤0.035% (ko ētahi paerewa e hiahia ana kia ≤0.025%)
Si (hiraka): 0.13%-0.45%
Mo (molybdenum): 0.41%-0.64% (ko ētahi paerewa e hiahia ana ki te 0.45%-0.60%)
Ni (nikara): 0.40%-0.70% (he whānuitanga matotoru)
Ngā tawhā mahi:
Kaha kume: 550-690 MPa (80-100 ksi)
Kaha whakaputa: ≥345 MPa (50 ksi)
Te roa: ≥15% ina he 200mm te roa o te ine, ≥18% ina he 50mm te roa o te ine
Āhua maimoatanga wera: Tukunga i roto i te āhua whakataurite, te āhua whakataurite + te whakamahana, te āhua hurihuri whakahaere rānei, me maimoatanga whakataurite ina neke atu i te 50mm te matotoru.
Ngā painga o te mahi ā-mīhini:
Taurite o te kaha teitei me te pakari: I te kaha kume 550-690 MPa, ka mau tonu te roa o te ≥18%, e whakarite ana i te kaha o te taputapu ki te ātete i te pakarukaru.
Hanganga o te kōpura angiangi: E tutuki ana i ngā whakaritenga rahi o te kōpura angiangi o te paerewa A20/A20M, ā, e whakapai ake ana i te pakari o te pānga ki te pāmahana iti.
3. Ngā take tono me ngā painga
Ahumahi matū hinu:
Tauira tono: E whakamahi ana tētahi umanga matū hinu i ngā pereti maitai SA302GrB hei hanga i ngā tauhohenga pēhanga-tiketike, e 5 tau te roa e rere tonu ana i te 400℃ me te 30 MPa, kāore he pakaru, he rerekētanga rānei.
Ngā Painga: He tino ātete ki te waikura hauwai, ā, ko te kitenga hapa ultrasonic 100% o ngā whakarewanga ka whakarite i te haumaru o ngā taputapu.
Te mara tipu mana karihi:
Tauira tono: Ko te oko pēhanga tauhohenga o te tipu hiko karihi e whakamahi ana i te pereti maitai SA302GrB me te matotoru o te 120mm. Mā te maimoatanga whakataurite me te whakamahana, ka whakapai ake te ātete irahiko mā te 30%.
Painga: Ko te ihirangi molybdenum o te 0.45%-0.60% ka aukati i te pakarukaru o te hihi niutron, ā, ka tutuki i ngā whakaritenga o ngā whakaritenga ASME.
Mara pōro teihana hiko:
Tauira tono: Kei roto i te pahu poiha tino whakararu te pereti maitai SA302GrB, e mahi ana i te 540℃ me te 25 MPa, ā, ka roa ake tōna ora mahi ki te 30 tau.
Painga: Ka eke te kaha o te pāmahana teitei ki te 690 MPa, he 15% te mama ake i te maitai waro, ā, ka whakaiti i te whakapaunga pūngao.
Mara whakaputa hiko wai:
Tauira tono: Ko te paipa wai pēhanga teitei o te teihana hiko wai e whakamahi ana i te pereti maitai SA302GrB, ā, e 200,000 ngā whakamātautau ngenge i puta i te taiao mai i te -20℃ ki te 50℃.
Painga: Ka tutuki i te pakari o te pānga pāmahana iti (≥27 J i te -20℃) ngā whakaritenga āhuarangi tino kino o ngā rohe maunga.
4. Te haumaru, te tiaki taiao me te hiranga o te ahumahi
Haumaru:
Kua paahitia te whakamātautau pānga ASTM A20 (pūngao pānga V-notch ≥34 J i te -20℃), ā, kei raro iho i te 0.1% te mōrearea o te pakaru pakarukaru i te pāmahana iti.
Ko te pakeke o te rohe e pāngia ana e te wera o te whakarewa he ≤350 HV hei ārai i te ngatata i puta mai i te hauwai.
Te tiaki taiao:
Mā te nui o te molybdenum o te 0.41%-0.64% ka whakaitihia te whakamahinga o te nickel, ā, ka whakaitihia hoki ngā tukunga o te konganuku taumaha.
E tutuki ana i te ture RoHS a te EU, ā, e aukati ana i te whakamahinga o ngā matū kino pēnei i te mata me te mercury.
Te hiranga o te ahumahi:
E 25% o te mākete pereti maitai oko pēhanga o te ao e kapi ana i tēnei, ā, he rauemi matua mō te kimi i ngā taputapu hiko karihi me ngā taputapu matū hinu i te rohe.
Ka tautoko i ngā whānuitanga pāmahana mai i te -20℃ ki te 450℃, ā, ka whakapai ake i te whai huatanga o te mahi a ngā taputapu mā te 15%-20% ki te whakaritea ki te maitai waro tuku iho.
Whakamutunga
Kua noho te pereti maitai SA302GrB hei rauemi matua mō ngā taputapu ahumahi hou mō te pāmahana teitei me te pēhanga teitei nā te mea he kaha teitei, he ātete ki te waikura, he ngāwari hoki te whakarewa. Nā te taurite o te haumaru, te tiaki taiao me te whai huatanga o te utu, kāore e taea te whakakapi i roto i ngā mara o te mana karihi, te matū hinu, te pūngao, me ētahi atu, ā, kei te akiaki i te whanaketanga o ngā taputapu ahumahi ki tētahi huarahi whai hua ake, haumaru ake hoki.
Wā tuku: Pipiri-04-2025