SA302GrB pā kila kila introductio

1. Nā hiʻohiʻona hana, hoʻohana a me nā hiʻohiʻona pili
ʻO SA302GrB kahi pāʻani kila manganese-molybdenum-nickel alloy haʻahaʻa haʻahaʻa e pili ana i ka maʻamau ASTM A302 a ua hoʻolālā ʻia no nā mea wela kiʻekiʻe a me nā mea hana kiʻekiʻe e like me nā ipu kaomi a me nā paila. ʻO kāna mau hiʻohiʻona hana koʻikoʻi:
ʻO nā waiwai mechanical maikaʻi loa: ikaika tensile ≥550 MPa, ikaika hua ≥345 MPa, elongation ≥18%, a hoʻokō ka paʻakikī hopena i ka maʻamau ASTM A20.
ʻO ka hana kuʻi ʻana maikaʻi: kākoʻo i ka hoʻoheheʻe ʻana i ka manual arc, ka hoʻoheheʻe arc submerged, ka welding pale kinoea a me nā kaʻina hana ʻē aʻe, a me ka preheating a me ka mālama wela e koi ʻia ma hope o ka wili ʻana e pale i nā māwae.
ʻO ke kūpaʻa wela kiʻekiʻe a me ka pale ʻana i ka corrosion: Noho paʻa i loko o ka pae wela o ka hana o -20 ℃ a 450 ℃, kūpono no nā wahi media corrosive e like me nā waikawa a me nā alkalis.
ʻO ka māmā a me ka ikaika kiʻekiʻe: Ma o ka hoʻolālā alloying haʻahaʻa, ʻoiai e hōʻemi ana i ke kaumaha o ka hale, hoʻomaikaʻi ʻia ka hiki ke hoʻoikaika a hoʻemi ʻia ke kumukūʻai hana.
ʻO nā hiʻohiʻona kūpono: nā mea hana nui ma nā kahua o nā petrochemical, nā mea kanu mana, nā mea kanu nuklea, nā mana wai, a me nā mea ʻē aʻe, e like me nā reactors, heat exchangers, spherical tanks, nuclear reactor pressure vessels, boiler drums, etc.
2. Nā mea nui, nā palena hana a me nā waiwai mechanical
ʻO ka haku mele ʻana (ka hoʻoheheʻe ʻana):
C (carbon): ≤0.25% (≤0.20% ke ≤25mm ka mānoanoa)
Mn (manganese): 1.07%-1.62% (1.15%-1.50% ke ≤25mm ka mānoanoa)
P (phosphorus): ≤0.035% (pono kekahi mau maʻamau ≤0.025%)
S (sulfur): ≤0.035% (pono kekahi mau maʻamau ≤0.025%)
Si (silikona): 0.13%-0.45%
Mo (molybdenum): 0.41% -0.64% (pono kekahi mau kūlana 0.45% -0.60%)
Ni (nickel): 0.40% -0.70% (kekahi mau mānoanoa)
Nā ʻāpana hana:
Ka ikaika uʻi: 550-690 MPa (80-100 ksi)
Ka ikaika hua: ≥345 MPa (50 ksi)
Elongation: ≥15% inā 200mm ka lōʻihi o ke ana, ≥18% ke 50mm ka lōʻihi o ka ana.
ʻO ke kūlana mālama wela: ʻO ka lawe ʻana i ka normalizing, normalizing + tempering a i ʻole ka hoʻomalu ʻana i ka ʻōwili ʻana, koi ʻia ka mālama maʻamau i ka wā o ka mānoanoa> 50mm.
Nā pōmaikaʻi hana mechanical:
ʻO ke kaulike o ka ikaika kiʻekiʻe a me ka paʻakikī: Ma ka 550-690 MPa ikaika tensile, mālama mau ia i ka elongation o ≥18%, e hōʻoia ana i ka hiki i nā mea hana ke pale aku i ka haki ʻana.
ʻO ke ʻano o ka palaoa maikaʻi: Hoʻokō i nā koi nui o ka palaoa maikaʻi o ka maʻamau A20/A20M a hoʻomaikaʻi i ka paʻakikī o ka hopena haʻahaʻa.
3. Nā hihia noi a me nā pono
ʻOihana Petrochemical:
Ka hihia noi: Hoʻohana ka ʻoihana petrochemical i nā pā kila SA302GrB e hana i nā reactors kiʻekiʻe, e holo mau ana no 5 mau makahiki ma 400 ℃ a me 30 MPa me ka ʻole o nā māwae a i ʻole deformation.
Pōmaikaʻi: maikaʻi ke kū'ē i ka hydrogen corrosion, a me ka 100% ultrasonic flaw detection o welds e hōʻoia i ka pono lako.
kahua kanu mana nuklea:
Ka hihia noi: Hoʻohana ka moku kaomi reactor o kahi mea kanu nuklea i ka pā kila SA302GrB me ka mānoanoa o 120mm. Ma o ka normalizing + tempering treatment, hoʻomaikaʻi ʻia ka pale ʻana o ka radiation e 30%.
Pōmaikaʻi: ʻO ka molybdenum maʻiʻo o 0.45% -0.60% kaohi i ka neutron irradiation embrittlement a hoʻokō i nā koi o nā kikoʻī ASME.
kahua pahu pahu mana:
Ka hihia noi: Hoʻohana ʻia kahi pahu boiler supercritical SA302GrB pā kila, e hana ana ma 540 ℃ a me 25 MPa, a hoʻonui ʻia kona ola lawelawe i 30 mau makahiki.
Pōmaikaʻi: Hiki i ka ikaika manawa pōkole ke kiʻekiʻe 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 wai wai:
Ka hihia noi: Hoʻohana ka paipu wai kiʻekiʻe o kahi hale mana wai i ka pā kila SA302GrB a hala i 200,000 mau hoʻāʻo luhi i kahi kaiapuni o -20 ℃ a 50 ℃.
Pōmaikaʻi: ʻO ka paʻakikī o ka hopena haʻahaʻa haʻahaʻa (≥27 J ma -20 ℃) ​​e hoʻokō i nā koi o ke aniau o nā wahi mauna.
4. Ka palekana, ka palekana o ke kaiapuni a me ka waiwai nui o ka ʻoihana
Palekana:
Ua hala i ka ho'āʻo hopena ASTM A20 (V-notch impact energy ≥34 J ma -20 ℃), e hōʻoia ana i ka pilikia o ka haʻihaʻi haʻahaʻa haʻahaʻa haʻahaʻa ma lalo o 0.1%.
ʻO ka paʻakikī o ka'āpana wela o ka weld he ≤350 HV e pale aku i ka hāhā o ka hydrogen.
Palekana kaiapuni:
ʻO ka molybdenum maʻiʻo o 0.41% -0.64% e ho'ēmi i ka hoʻohanaʻana i ka nickel a ho'ēmi i nā hoʻokuʻu metala kaumaha.
Hoʻokō me ka EU RoHS kuhikuhi a pāpā i ka hoʻohana ʻana i nā mea ʻino e like me ke alakaʻi a me ka mercury.
Koʻikoʻi ʻoihana:
ʻO ia ka 25% o ka mākeke ipu kila kila honua a he kumu nui ia no ka localization o ka mana nuklea a me nā lako petrochemical.
Kākoʻo i nā noi ākea ākea mai -20 ℃ a i 450 ℃, a hoʻomaikaʻi i ka pono hana pono e 15% -20% i hoʻohālikelike ʻia me ke kila kalapona kuʻuna.
Ka hopena
Ua lilo ka pā kila SA302GrB i mea koʻikoʻi o ka ʻenehana ʻenehana kiʻekiʻe-mehana a me nā mea paʻi kiʻekiʻe ma muli o kona ikaika kiʻekiʻe, ke kūpaʻa ʻana a me ka maʻalahi o ka wili. ʻO ke koena o ka palekana, ka palekana o ke kaiapuni a me ke kumukūʻai kūpono ʻole e hiki ke hoʻololi ʻia i nā kahua o ka mana nuklea, petrochemical, ikehu, a me nā mea ʻē aʻe, a ke alakaʻi nei ia i ka hoʻomohala ʻana i nā mea hana ʻoihana i kahi ʻoi aku ka maikaʻi a me ka palekana.