He rino kowiri tira austenitic teitei-waro-iti kāore i te pumau. Mā te tāpiri i te parahi ki tēnei taumata ka nui ake te ātete ki ngā waikawa whakaiti kaha, inā koa te waikawa whanariki. He tino ātete hoki ki te whakaekenga o te hauota - te waikura o te rua/te kapiti me te pakaru o te waikura ahotea.
Kāore tēnei momo i te aukume i ngā āhuatanga katoa, ā, he tino pai te āhua o te whakarewa me te hanga. Nā te hanganga austenitic anō hoki ka tino pakari tēnei momo, tae noa ki ngā pāmahana cryogenic.
He nui rawa ngā rauemi utu nui o te nikara me te moriperenum kei roto i te 904L. He maha ngā whakamahinga i pai ai te mahi a tēnei momo i mua, ka taea inaianei te whakatutuki i te utu iti mā te whakamahi i te maitai kore waikura takirua 2205 (S31803, S32205 rānei), nō reira kāore i te tino whakamahia i mua.
Ngā Āhuatanga Matua
Kua tohua ēnei āhuatanga mō te hua hurihuri papatahi (pereti, rau me te koiri) i roto i te ASTM B625. Kua tohua ngā āhuatanga ōrite engari kāore e tino ōrite mō ētahi atu hua pērā i te paipa, te ngongo me te pae i roto i ā rātou whakaritenga.
Te hanganga
Ripanga 1.Ngā awhe hanganga mō ngā maitai kore waikura kounga 904L.
| Tau | C | Mn | Si | P | S | Cr | Mo | Ni | Cu | |
| 904L | meneti mōrahi | - 0.020 | - 2.00 | - 1.00 | - 0.045 | - 0.035 | 19.0 23.0 | 4.0 5.0 | 23.0 28.0 | 1.0 2.0 |
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Ngā Āhuatanga Mīhini
Ripanga 2.Ngā āhuatanga hangarau o ngā maitai kowiri tira 904L.
| Tau | Kaha Kume (MPa) min | Kaha Hua 0.2% Whakamātautau (MPa) min | Te roa (% i roto i te 50mm) min | Te pakeketanga | |
| Rockwell B (HR B) | Brinell (HB) | ||||
| 904L | 490 | 220 | 35 | 70-90 noa | - |
| He mea noa iho te awhe uara mārō o Rockwell; ko ētahi atu uara he rohe kua tohua. | |||||
Ngā Āhuatanga Ā-tinana
Ripanga 3.Ngā āhuatanga ā-tinana noa mō ngā maitai kore waikura o te taumata 904L.
| Tau | Kiato | Tauwehenga Ātete | Tau toharite o te Whānuitanga Wera (µm/m/°C) | Te Arahi Wera | Wera Motuhake 0-100°C | Ātete Hiko | |||
| 0-100°C | 0-315°C | 0-538°C | I te 20°C | I te 500°C | |||||
| 904L | 8000 | 200 | 15 | - | - | 13 | - | 500 | 850 |
Whakataurite Whakatakotoranga Tauira
Ripanga 4.Ngā whakatakotoranga tohu mō ngā maitai kowiri tira tohu 904L.
| Tau | Nama UNS | Peretānia Tawhito | Euronorm | Huitene SS | JIS Hapanihi | ||
| BS | En | No | Ingoa | ||||
| 904L | N08904 | 904S13 | - | 1.4539 | X1NiCrMoCuN25-20-5 | 2562 | - |
| He whakataurite tata noa iho ēnei. Ko te rārangi he whakataurite i ngā rauemi rite tonu te mahi.kāorehei rārangi o ngā mea ōrite i roto i te kirimana. Mena e hiahiatia ana ngā mea ōrite tika, me tirotiro ngā whakatakotoranga taketake. | |||||||
Ngā Māka Rerekē Pea
Ripanga 5.Ētahi atu momo pea hei whakakapi i te maitai kore waikura 904L.
| Tau | He aha i whiriwhiria ai pea hei utu mō te 904L |
| 316L | He huarahi iti ake te utu, engari he iti ake te ātete ki te waikura. |
| 6M | Me nui ake te ātete ki te waikura i ngā poka me ngā kapiti. |
| 2205 | He tino rite te ātete ki te waikura, he kaha ake te kaha ā-ringa o te 2205, ā, he iti ake te utu ki te 904L. (Kāore te 2205 e pai mō ngā pāmahana neke atu i te 300°C.) |
| Tino takirua | E hiahiatia ana he ātete waikura nui ake, me te kaha nui ake i te 904L. |
Ātete ki te Waikura
Ahakoa i whakawhanakehia i te tuatahi mō tōna ātete ki te waikawa whanariki, he tino teitei anō hoki tōna ātete ki ngā momo taiao whānui. Ko te PRE o te 35 e tohu ana he pai te ātete o te rauemi ki te wai moana mahana me ētahi atu taiao nui te hauota. Ko te nui o te nikara ka hua ake he ātete pai ake ki te pakaru waikura ahotea i ngā tohu austenitic paerewa. Ka tāpirihia e te parahi te ātete ki te whanariki me ētahi atu waikawa whakaiti, inā koa i roto i te awhe "waenga kukū" tino kaha.
I te nuinga o ngā taiao, he takawaenga te mahi waikura o te 904L i waenga i te karaehe austenitic paerewa 316L me te molybdenum 6% tino whakarewa me ngā karaehe "super austenitic" rite.
He iti ake te ātete o te waikawa hauota kaha 904L i ngā momo kore-molybdenum pērā i te 304L me te 310L.
Kia tino ātete ai te maitai ki te pakaru waikura i roto i ngā taiao tino kino, me rongoā te maitai ki te wai whakapūkara i muri i te mahi matao.
Ātete Wera
He pai te ātete ki te waikura, engari pērā i ētahi atu momo konukōrei tino pai, ka pāngia e te kore pumau o te hanganga (te ua o ngā wāhanga pakarukaru pērā i te sigma) i ngā pāmahana teitei. Kaua te 904L e whakamahia ki runga ake i te 400°C.
Te Maimoatanga Wera
Maimoatanga Wairewa (Whakamahana) – whakamahanahia ki te 1090-1175°C, ā, whakamatao wawetia. Kāore e taea te whakapakeke i tēnei momo mā te maimoatanga wera.
Whakarewa
Ka taea te whakarewa angitu i te 904L mā ngā tikanga paerewa katoa. Me tūpato nā te mea ka totoka katoa tēnei momo i roto i te austenitic, nō reira ka ngawari ki te pakaru wera, inā koa i roto i ngā whakarewanga here. Kaua e whakamahia te whakamahana-mua, ā, i te nuinga o te wā kāore e hiahiatia he maimoatanga wera i muri i te whakarewa. Ka tohua e AS 1554.6 ngā tokotoko me ngā irahiko o te Tau 904L mō te whakarewa o te 904L.
Te Hanga
He tino parakore te 904L, he iti te whanariki, nō reira, kāore e pai te mīhini. Ahakoa tēnei, ka taea te mīhini i te kounga mā te whakamahi i ngā tikanga paerewa.
He ngāwari te piko ki tētahi pūtoro iti. I te nuinga o te wā ka mahia mā te makariri. Kāore e hiahiatia te whakamahana i muri mai, engari me whai whakaaro mēnā ka whakamahia te hanganga i roto i tētahi taiao e matapaetia ana ka pakaru te waikura ahotea.
Ngā tono
Ko ngā tono noa ko:
• Te whare tukatuka mō ngā waikawa whanariki, whākawa me te waikawa acetic
• Te tukatuka penupenu me te pepa
• Ngā wāhanga i roto i ngā tipu horoi hau
• Ngā taputapu whakamatao wai moana
• Ngā wāhanga o te whare whakahinuhinu hinu
• Ngā waea i roto i ngā pūwhakaheke hiko
