1. Nā ʻano hana, nā hoʻohana a me nā hiʻohiʻona pili
ʻO SA302GrB kahi papa kila hao manganese-molybdenum-nickel ikaika haʻahaʻa i pili i ke kūlana ASTM A302 a ua hoʻolālā ʻia no nā lako hana wela kiʻekiʻe a me ke kaomi kiʻekiʻe e like me nā ipu kaomi a me nā paila. ʻO kāna mau ʻano hana koʻikoʻi:
Nā waiwai mechanical maikaʻi loa: ikaika tensile ≥550 MPa, ikaika hua ≥345 MPa, elongation ≥18%, a me ka paʻakikī hopena e kū ana i ke kūlana ASTM A20.
Hana maikaʻi o ka hoʻoheheʻe ʻana: kākoʻo i ka hoʻoheheʻe ʻana o ka arc manual, ka hoʻoheheʻe ʻana o ka arc submerged, ka hoʻoheheʻe ʻana i ka pale kinoea a me nā kaʻina hana ʻē aʻe, a pono ka hoʻomehana mua a me ka mālama wela ma hope o ka hoʻoheheʻe ʻana e pale aku i nā māwae.
Ke kūpaʻa wela kiʻekiʻe a me ke kūpaʻa i ka pala: Noho paʻa i loko o ka pae mahana hana mai -20℃ a i 450℃, kūpono no nā wahi media corrosive e like me nā waikawa a me nā alkalis.
Māmā a me ka ikaika kiʻekiʻe: Ma o ka hoʻolālā hoʻohuihui haʻahaʻa, ʻoiai e hōʻemi ana i ke kaumaha o ke ʻano, ua hoʻomaikaʻi ʻia ka hiki ke halihali kaomi a ua hoʻemi ʻia ke kumukūʻai hana lako.
Nā hiʻohiʻona kūpono: nā lako koʻikoʻi ma nā kahua o ka petrochemicals, nā paila mea kanu mana, nā mea kanu mana nukelea, ka hanauna hydropower, a me nā mea ʻē aʻe, e like me nā reactors, nā mea hoʻololi wela, nā pahu poepoe, nā ipu kaomi reactor nukelea, nā pahu paila, a me nā mea ʻē aʻe.
2. Nā ʻāpana nui, nā palena hana a me nā waiwai mechanical
ʻO ka hoʻohuihui kemika (ka loiloi hoʻoheheʻe):
C (kalapona): ≤0.25% (≤0.20% i ka wā e mānoanoa ai ≤25mm)
Mn (manganese): 1.07%-1.62% (1.15%-1.50% ke mānoanoa ≤25mm)
P (phosphorus): ≤0.035% (koi kekahi mau kūlana i ka ≤0.025%)
S (sulfur): ≤0.035% (koi kekahi mau kūlana i ≤0.025%)
Si (silikona): 0.13%-0.45%
Mo (molybdenum): 0.41%-0.64% (koi kekahi mau kūlana i ka 0.45%-0.60%)
Ni (nickel): 0.40%-0.70% (kekahi pae mānoanoa)
Nā palena hana:
Ikaika tensile: 550-690 MPa (80-100 ksi)
Ikaika hua: ≥345 MPa (50 ksi)
Elongation: ≥15% ke 200mm ka lōʻihi o ke ana, ≥18% ke 50mm ka lōʻihi o ke ana
Kūlana mālama wela: Hāʻawi ʻia i ka normalizing, normalizing + tempering a i ʻole ka mokuʻāina ʻōwili i kāohi ʻia, pono ka mālama normalizing ke ʻano mānoanoa >50mm.
Nā pono hana mīkini:
Ke kaulike o ka ikaika kiʻekiʻe a me ka paʻakikī: Ma ka ikaika tensile 550-690 MPa, mālama mau ia i kahi elongation o ≥18%, e hōʻoiaʻiʻo ana i ka hiki o ka lako ke kū'ē i ka haki brittle.
ʻAno palaoa maikaʻi: Hoʻokō i nā koi o ka nui o ka palaoa maikaʻi o ke kūlana A20/A20M a hoʻomaikaʻi i ka paʻakikī o ka hopena haʻahaʻa.
3. Nā hihia noi a me nā pono
ʻOihana petrochemical:
Hihia noi: Hoʻohana kahi ʻoihana petrochemical i nā papa kila SA302GrB e hana i nā reactors kiʻekiʻe-kaomi, ka mea i holo mau no 5 mau makahiki ma 400 ℃ a me 30 MPa me ka ʻole o nā māwae a i ʻole ke ʻano ʻē.
Nā Pōmaikaʻi: ʻO ke kūpaʻa maikaʻi loa i ka hydrogen corrosion, a me ka ʻike ʻana o nā kīnā ultrasonic 100% o nā wili e hōʻoiaʻiʻo ana i ka palekana o nā lako.
Kahua hana mana nukelea:
Hihia noi: Hoʻohana ka ipu kaomi reactor o kahi hale hana mana nukelea i ka papa kila SA302GrB me ka mānoanoa o 120mm. Ma o ka normalizing + tempering treatment, hoʻomaikaʻi ʻia ke kū'ē ʻana i ka radiation ma 30%.
Pōmaikaʻi: ʻO ka nui o ka Molybdenum o 0.45%-0.60% e kāohi i ka neutron irradiation embrittlement a hoʻokō i nā koi o nā kikoʻī ASME.
Kahua paila kikowaena mana:
Hihia noi: Hoʻohana kahi pahu paila supercritical i ka papa kila SA302GrB, e hana ana ma 540 ℃ a me 25 MPa, a ua hoʻolōʻihi ʻia kona ola lawelawe i 30 mau makahiki.
Pōmaikaʻi: ʻO ka ikaika pōkole o ke ana wela kiʻekiʻe e hiki i ka 690 MPa, ʻo ia ka 15% māmā ma mua o ke kila kalapona a hoʻemi i ka hoʻohana ʻana i ka ikehu.
Kahua hana ikehu wai:
Hihia noi: Hoʻohana ka paipu wai kiʻekiʻe o kahi kahua hydropower i ka papa kila SA302GrB a hala i 200,000 mau hoʻāʻo luhi i loko o kahi ʻano o -20℃ a 50℃.
Pōmaikaʻi: ʻO ka paʻakikī o ka hopena wela haʻahaʻa (≥27 J ma -20 ℃) e hoʻokō i nā koi aniau koʻikoʻi o nā wahi mauna.
4. Palekana, palekana kaiapuni a me ke koʻikoʻi o ka ʻoihana
Palekana:
Ua hala i ka hoʻāʻo hopena ASTM A20 (ka ikehu hopena V-notch ≥34 J ma -20 ℃), e hōʻoiaʻiʻo ana i ka pilikia o ka haki ʻana o ka brittle haʻahaʻa haʻahaʻa ma lalo o 0.1%.
ʻO ka paʻakikī o ka ʻāpana i hoʻopilikia ʻia e ka wela o ka weld he ≤350 HV e pale ai i ka nahā ʻana i hoʻokomo ʻia e ka hydrogen.
Ka palekana o ke kaiapuni:
ʻO ka nui o ka molybdenum o 0.41%-0.64% e hōʻemi ana i ka hoʻohana ʻana i ka nickel a hoʻemi i nā hoʻokuʻu ʻana o nā metala kaumaha.
Kūlike me ke kuhikuhi ʻana o ka EU RoHS a pāpā i ka hoʻohana ʻana i nā mea ʻino e like me ke kēpau a me ka mercury.
Ke koʻikoʻi o ka ʻoihana:
ʻO ia ka 25% o ka mākeke kila kila o ka ipu kaomi honua a he mea nui ia no ka kūloko ʻana o ka mana nukelea a me nā lako petrochemical.
Kākoʻo i nā noi ākea o ka mahana mai -20℃ a i 450℃, a hoʻomaikaʻi i ka pono hana o nā lako ma 15%-20% i hoʻohālikelike ʻia me ke kila kalapona kuʻuna.
Hopena
Ua lilo ka papa kila SA302GrB i mea nui o nā lako hana wela kiʻekiʻe a me ke kaomi kiʻekiʻe o nā ʻoihana hou ma muli o kona ikaika kiʻekiʻe, ke kūpaʻa i ka pala a me ka maʻalahi o ka hoʻopili ʻana. ʻO kona kaulike o ka palekana, ka palekana o ke kaiapuni a me ke kumukūʻai kūpono e lilo ia i mea pono ʻole i nā kahua o ka mana nukelea, nā petrochemicals, ka ikehu, a me nā mea ʻē aʻe, a ke hoʻokele nei ia i ka hoʻomohala ʻana o nā lako hana ʻoihana i kahi ala ʻoi aku ka maikaʻi a me ka palekana.
Ka manawa hoʻouna: Iune-04-2025