Loaʻa mau ka waiwai 254SMO maikaʻi i ka waiwai maʻamau i kāna ʻano kemika, aia kēlā me kēia ʻāpana i kāna hana ponoʻī:
Nickel (Ni): Hiki i ka Nickel ke hoʻonui i ka ikaika o ke kila 254SMO me ka mālama ʻana i ka plasticity maikaʻi a me ka paʻakikī. He kiʻekiʻe ke kūpaʻa ʻana o Nickel i nā ʻakika a me nā alkalis, a me ka ʻōpala a me ka pale wela i nā wela kiʻekiʻe.
Molybdenum (Mo): Hiki i ka Molybdenum ke hoʻomaʻemaʻe i ka palaoa o ke kila 254SMO, hoʻomaikaʻi i ka hardenability a me ka ikaika wela, a mālama i ka ikaika kūpono a me ke kūpaʻa ʻana i nā wela kiʻekiʻe (koʻikoʻi lōʻihi i nā wela kiʻekiʻe, deformation, loli kolo).
Titanium (Ti): Titanium mea he deoxidizer ikaika ma 254SMO kila. Hiki iā ia ke hana i ke ʻano o loko o ke kila, hoʻomaʻemaʻe i ka ikaika o ka palaoa; e hoemi i ka elemakule a me ke anu. E hoʻomaikaʻi i ka hana wili. ʻO ka hoʻohui ʻana i ka titanium kūpono i ka chromium 18 nickel 9 austenitic stainless steel e pale i ka corrosion intergranular.
Chromium (Cr): Hiki i ka Chromium ke hoʻomaikaʻi i ka pale ʻana o ke kila a no laila he mea hoʻohui koʻikoʻi o 254SMO kila kila a me ke kila wela.
Copper (Cu): Hiki i ke keleawe ke hoʻonui i ka ikaika a me ka paʻakikī, ʻoi aku hoʻi i ka ʻino o ka lewa. ʻO ka hemahema ʻo ia ka ulu ʻana o ka brittleness wela i ka wā hana wela a ʻoi aku ka plasticity o ke keleawe ma mua o 0.5%. Ke emi ka mea keleawe ma lalo o 0.50%, ʻaʻohe hopena i ka solderability o ka mea 254SMO.
Ma muli o nā ʻokoʻa o nā ʻāpana nui i luna, hiki ke hoʻohana ʻia nā ʻano o 254SMO nickel alloys:
1. Nickel-copper (Ni-Cu) alloy, i ʻike ʻia ʻo Monel alloy (Monel alloy)
2. ʻO ka nickel-chromium (Ni-Cr) alloy he nickel-based heat-resistant alloy.
3. ʻO ka huila Ni-Mo e pili ana i ka moʻo Hastelloy B
4. ʻO ka huila Ni-Cr-Mo e pili ana i ka moʻo Hastelloy C
Hoʻohana ʻia ʻo 254SMO i nā ʻoihana ʻenehana like ʻole, kona hoʻohana kūloko o nā puna lau, nā puna coil, nā ʻāpana sealing, nā ʻāpana exhaust automotive, catalytic converters, EGR coolers, turbochargers a me nā mea wela wela, nā mokulele Austenitic stainless steel plates i hoʻohana ʻia no nā ʻāpana hui.
ʻO ka mea nui, kahi ʻāpana o nā noi no nā ʻenehana ʻenehana like ʻole, nā pahu pahu kaʻa, a me nā mea ʻē aʻe i hoʻohana ʻia ma lalo o ka wela kiʻekiʻe e hoʻohana ana i ka NPF625 a me NCF718 i kuhikuhi ʻia ma JIS G 4902 (corrosion-resistant and heat-resistant superalloy plate) e loaʻa i nā pākēneka nui. ʻOi aku ia ma mua o 50% o nā mea pipiʻi o Ni. Ma ka ʻaoʻao ʻē aʻe, no nā mea e like me ke kila kila i hoʻonui ʻia i ka ua e like me SUH660 e hoʻohana ana i nā pūhui intermetallic o Ti a me Al i kuhikuhi ʻia ma JIS G 4312 (pale kila pale wela), e emi nui ka paʻakikī o 254 SMO ke hoʻohana ʻia no kahi lōʻihi. ka manawa ma nā wela kiʻekiʻe, a wale nō ʻO ka hoʻohana ʻana a hiki i ka 500 ° C ʻaʻole e hoʻokō i nā ʻano i koi ʻia no nā gaskets pale wela i hāpai ʻia e ka wela kiʻekiʻe i nā makahiki i hala.
Kaumaha: 254SMO
Nā kūlana aupuni: 254SMO/F44 (UNS S31254/W.Nr.1.4547)
Hoa: Outokumpu, AVESTA, Hastelloy, SMC, ATI, Kelemānia, ThyssenKrupp VDM, Mannex, Nickel, Sandvik, Suedena Japan Metallurgical, Nippon Steel a me nā mea kaulana ʻē aʻe.
Makana ʻAmelika:UNS S31254
Nānā o 254SMo (S31254): He kila kila austenitic. Ma muli o kona kiʻekiʻe molybdenum maʻiʻo, he kiʻekiʻe loa kona kū'ē i ka lua a me ka crevice corrosion. Ua hoʻomohala ʻia a hoʻomohala ʻia ʻo 254SMo no ka hoʻohana ʻana i nā kaiapuni i loko o ka halide e like me ka wai kai.
ʻO 254SMo (S31254) ʻO Super Stainless Steel kahi ʻano kūikawā o ke kila kila. He ʻokoʻa ia mai ke kila kila maʻamau ma ke ʻano o ka haku melemele. E pili ana ia i ke kila kila kila kiʻekiʻe me ka nickel kiʻekiʻe, ka chromium kiʻekiʻe, a me ka molybdenum kiʻekiʻe. ʻO ke kila kila kila maikaʻi loa, ʻo ka nickel-based alloy kahi ʻano kila kila, ʻokoʻa ka haku mele mua mai ke kila kila maʻamau, e pili ana i kahi alloy kiʻekiʻe i loaʻa ka nickel kiʻekiʻe, ka chromium kiʻekiʻe, ke kila kila molybdenum kiʻekiʻe. ʻO ka mea maikaʻi loa ʻo 254Mo, nona ka 6% Mo. ʻO kēia ʻano kila he kūʻē maikaʻi loa i ka corrosion localized. Loaʻa iā ia ke kū'ē maikaʻi i ka pitting corrosion ma lalo o ke kai, aeration, nā āpau, a me nā kūlana erosion haʻahaʻa haʻahaʻa (PI ≥ 40) a ʻoi aku ka maikaʻi o ke koʻikoʻi pale ʻana i ka corrosion, nā mea ʻē aʻe no nā mea hoʻohui Ni-based a me nā alloys titanium. ʻO ka lua, i ka hana kiʻekiʻe a i ʻole ka corrosion, ʻoi aku ka maikaʻi o ke kūʻē ʻana i ke kiʻekiʻe kiʻekiʻe a i ʻole ke kūpaʻa corrosion, ʻaʻole hiki ke hoʻololi ʻia ʻo 304 stainless steel. Eia kekahi, mai ka hoʻokaʻawale ʻana o ke kila kila, ʻo ke ʻano kila kila kila kūikawā he mea paʻa austenite metallographic paʻa. No ka mea, he ʻano mea kila kila kūikawā kēia, paʻakikī loa i ka hana ʻana. ʻO ka mea maʻamau, hiki i nā kānaka ke hilinaʻi wale i ke kaʻina hana kuʻuna no ka hana ʻana i kēia kila kila kūikawā, e like me ka ninini ʻana, forging, rolling a pēlā aku.
I ka manawa like, loaʻa iā ia nā ʻano o ke kūpaʻa wela kiʻekiʻe e like me kēia:
1. Hōʻike ka helu nui o nā hoʻokolohua āpau a me ka ʻike nui ʻoiai ma nā mahana kiʻekiʻe iki, ʻo ka 254SMO he kiʻekiʻe ka pale ʻana i ka corrosion i loko o ke kai, a he mau ʻano ʻano kila kuhili wale nō kēia waiwai.
2. Hiki ke hoʻohālikelike ʻia ke kūpaʻa ʻana o ka corrosion o 254SMO i loko o nā waiʻawaʻawa a me ka oxidizing halide solutions e like me nā mea i koi ʻia no ka hana ʻana i ka bleach ma ka pepa me ka nickel-base alloys a me ka titanium alloys i kūpaʻa loa i ka corrosion.
Ka manawa hoʻouna: Apr-24-2018