Ko te kowiri tira Martensitic e tohu ana ki tetahi momo kowiri tira ko te hangahanga moroiti te nuinga he martensite. Ko te ihirangi chromium o te martensitic kowiri tira kei roto i te awhe o 12% - 18%, me ona huānga koranu matua he rino, chromium, nickel me te waro.
Ka taea e te kowiri tira Martensitic te whakatika i ona ahuatanga miihini na roto i te maimoatanga wera me te ahua o te kowiri tira whakapakeke. Ka taea te wehewehea te kowiri tira martensitic ki te martensitic chromium steel me te martensitic chromium-nickel steel e ai ki nga hanganga matū rereke.
Nga Tirohanga Tere o Martensitic Stainless Steel | |
| Kāwai | Kowiri tira |
| Whakamaramatanga | He momo kowiri tira whakakaha me te hanga Martensitic |
| Maimoatanga Wera | Te hiri, te tinei, te whakama |
| Huānga Alloy | Cr, Ni, C, Mo, V |
| Te paihere | Pohara |
| aukume | Waenga |
| Hanganga Moroiti | Ko Martensitic te nuinga |
| Koeke Angamaheni | Cr13, 2Cr13, 3Cr13 |
| Nga tono | Ko te mata kapohiko koromamao, Te Ripanga, Nga Taonga Taonga, Aerospace, Nga ahumahi moana |
Ko te kowiri tira Martensitic e tohu ana ki tetahi momo kowiri tira ko te hangahanga moroiti te nuinga he martensite. Ko te ihirangi chromium o te martensitic kowiri tira kei roto i te awhe o 12% - 18%, me ona huānga koranu matua he rino, chromium, nickel me te waro.
Ka taea e te kowiri tira Martensitic te whakatika i ona ahuatanga miihini na roto i te maimoatanga wera me te ahua o te kowiri tira whakapakeke. Ka taea te wehewehea te kowiri tira martensitic ki te martensitic chromium steel me te martensitic chromium-nickel steel e ai ki nga hanganga matū rereke.
1. Martensitic Chromium Steel
I tua atu i te chromium, kei roto ano te martensitic chromium maitai etahi waro. Ko te ihirangi chromium e whakatau ana i te parenga waikura o te maitai. Ko te teitei ake o te ihirangi waro, ka teitei ake te kaha, te pakeke me te aukati kakahu. Ko te hanga noa o tenei momo maitai he martensite, he iti ano te austenite, ferrite, pearlite ranei etahi. Ka whakamahia te nuinga ki te hanga i nga waahanga, i nga waahanga, i nga taputapu, i nga maripi, me era atu e hiahia ana kia kaha te kaha me te pakeke, engari kaore e hiahiatia te aukati nui. Ko nga tohu maitai ko te 2Crl3, 4Crl3, 9Crl8, etc.
2. Martensitic Chromium-Nickel maitai
Martensitic chromium-nickel maitai kei roto martensitic precipitation whakapakeke kowiri tira, semi-austenitic precipitation whakapakeke kowiri tira me te maraging kowiri tira, me etahi atu, he mea kowiri tira teitei-kaha, ultra-tiketike ranei. He iti te waro o tenei momo rino (he iti ake i te 0.10%), he nickel kei roto. Ko etahi o nga tohu kei roto ano nga huānga teitei penei i te molybdenum me te parahi. Na reira, he kaha te kaha o tenei momo rino, i te whakakotahitanga o te kaha me te uaua me te aukati waikura. He pai ake te mahi, te weldability, aha atu i te martensitic chromium maitai. Ko Crl7Ni2 te kowiri tira martensitic iti-nickel e whakamahia nuitia ana.
Martensitekowiri tira whakapakeke te rerengate tikanga kei roto hoki te rino Al, Ti, Cu me etahi atu huānga. Ka whakahekehia te Ni3A1, Ni3Ti me etahi atu waahanga whakapakari marara i runga i te matrix martensite na roto i te whakamaroketanga o te ua kia pai ake ai te kaha o te maitai. Semi-austenite (te ahua-martensitic ranei) rerenga whakapakeke kowiri tira, no te mea he austenite tonu te ahua tineia, na reira ka taea tonu te mahi matao te ahua tineia, katahi ka whakakahahia e te maimoatanga takawaenga, te maimoatanga o te koroheketanga me etahi atu tukanga. I tenei ara, ko te austenite i roto i te martensitic precipitation whakapakeke kowiri tira ka taea te huri tika ki te martensite i muri i te tinei, e arahi ana ki te ngoikoretanga o te uaua ki te tukatuka me te hanga i muri mai. Ko nga tohu maitai e whakamahia ana ko 0Crl7Ni7AI, 0Crl5Ni7M02A1 me etahi atu. He ahua teitei te kaha o tenei momo rino, i te nuinga o te waa ka eke ki te 1200-1400 MPa, he maha nga wa e whakamahia ana hei hanga i nga waahanga hangahanga kaore e hiahiatia te aukati teitei engari me kaha te kaha.
Ko te maimoatanga wera e whakamahia nuitia ana mo te martensitic kowiri tira ko te tinei me te whakamaarama. I te nuinga o te wa ka whiriwhiria kia whakamatao i roto i te hinu, i te hau ranei i te mahana o te 950-1050 ℃. Katahi ka whakamaua ki te 650-750°C. Ko te tikanga, me whakapataritari i muri tonu i te tineia kia kore ai e pakaru te makanga na te taumaha o te hanganga tineia.
Te kaha o te kaha iti-wao martensitic whakarewa kowiri tira kei roto i te iti o te nickel, molybdenum, silicon me etahi atu huānga whakakotahi he pai nga waahanga miihini matawhānui, nga taonga whakapiri me te aukati mau i muri i te whakatikatika me te whakamahana. Kei te whakamahia nuitia enei whakarewatanga i roto i te whakarewanga whakaurunga me te whakarewanga + impellers o nga turbine hydraulic nui. I roto i tenei take, ko te whakamaarama whakamaarama wera i te nuinga o te waa ko te whakarite i te 950 - 1050 ℃ me te whakamahana i te 600 -670 ℃.
Wā tuku: Akuhata-17-2021