E ai ki tōna hanganga whakarewa, ka taea te wehewehe i te kowiri tira ki te kowiri tira austenitic, te kowiri tira ferritic, te kowiri tira martensitic me te kowiri tira duplex.
(1) Kowiri tira Austenitic
Ko te hanganga pāmahana rūma o te maitai kore waikura austenitic he austenite, ka hangaia mā te tāpiri i te nikara e tika ana ki te maitai kore waikura chromium teitei.
He pumau te hanganga austenite o te maitai kore waikura austenitic ina kei roto i te 18% te Cr, 8% ki te 25% te Ni, ā, 0.1% te C. Ko te maitai kore waikura austenitic he mea hanga mai i te koranu rino Cr18Ni9. E ono ngā raupapa maitai kore waikura austenitic kua whakawhanakehia mō ngā whakamahinga rerekē.
Ngā momo noa o te maitai kore waikura austenitic:
(1) 1Cr17Mn6Ni15N; (2) 1Cr18Mn8Ni5N; (3) 1Cr18Ni9; (4) 1Cr18Ni9Si3; (5) 06Cr19Ni10; (6) 00Cr19Ni10; (7) 0Cr19Ni9N; (8) 0Cr19Ni10NbN; (9) 00Cr18Ni10N; (10) 1Cr18Ni12; (11) 0Cr23Ni13; (12) 0Cr25Ni20; (13) 0Cr17Ni12Mo2; (14) 00Cr17Ni14Mo2; (15) 0Cr17Ni12Mo2N; (16) 00Cr17Ni13Mo2N; (17) 1Cr18Ni12Mo2Ti; (18) 0Cr; 1Cr18Ni12Mo3Ti; (20) 0Cr18Ni12Mo3Ti; (21) 0Cr18Ni12Mo2Cu2; (22) 00Cr18Ni14Mo2Cu2; (23) 0Cr19Ni13Mo3; (24) 00Cr19Ni13Mo3; (25) 0Cr18Ni16Mo5; (26) 1Cr18Ni9Ti; (27) (29) 0Cr18Ni; 0Cr18Ni13Si4;
He nui te Ni me te Cr i roto i te maitai kore waikura austenitic, ka hangaia he maitai austenite i te pāmahana rūma. He pai tōna āhua kirihou, pakari, ngāwari ki te whakarewa, ātete ki te waikura, me ōna āhuatanga aukume kore-aukume, ngoikore rānei. He pai tōna ātete ki te waikura i roto i ngā rauemi whakahāngai me te whakaiti. Ka whakamahia hei hanga taputapu ātete-waikawa, pērā i ngā ipu ātete-waikura me te whakapuru taputapu me te kawe waka. Ka taea hoki te whakamahi i ngā paipa, ngā wāhanga taputapu ātete-waikawa hauota, me ētahi atu, hei rauemi matua mō ngā whakapaipai. Ko te maitai kore waikura austenitic te tikanga e whakamahi ana i te maimoatanga otinga, arā, ka whakamahanahia te maitai ki te 1050 ki te 1150°C, kātahi ka whakamataohia ki te wai, ka whakamataohia rānei ki te hau kia whiwhi ai i te hanganga austenite kotahi-wāhanga.
(2) te maitai kore waikura ferritic
Ngā momo maitai kore waikura ferritic e whakamahia whānuitia ana: (1) 1Cr17; (2) 00Cr30Mo2; (3) 00Cr17; (4) 00Cr17; (5) 1Cr17Mo; (6) 00Cr27Mo;
Ko te maitai kore waikura Ferritic he maitai kore waikura, ko tōna hanganga he ferrite te nuinga i te pāmahana rūma. Ko te ihirangi chromium he 11%-30%, ka piki ake tōna ātete ki te waikura, te pakari me te kaha whakarewa me te pikinga ake o te ihirangi chromium, he pai ake te ātete ki te waikura ahotea chloride i ētahi atu momo maitai kore waikura, ko tēnei momo maitai kāore i te nuinga o te wā he nikara, i ētahi wā he iti noa te Mo, Ti, Nb me ētahi atu huānga kei roto. Ko ngā āhuatanga o tēnei momo maitai he kawe wera nui, he iti te tauwehenga whānui, he pai te ātete ki te waikura, me te ātete ki te waikura ahotea pai rawa atu. Ko te nuinga o te wā ka whakamahia hei whakaputa ātete hau, te mamaoa wai, te wai me ngā waikawa waikura. Ngā wāhanga waikura. Heoi, he ngoikore ngā āhuatanga miihini me te mahi tukanga, ā, ko te nuinga o te wā ka whakamahia i roto i ngā hanganga ātete-waikura me te iti o te ahotea me te rite ki ngā maitai ārai-waikura. Ka taea hoki e ia te whakaputa wāhanga e mahi ana i ngā pāmahana teitei, pērā i ngā wāhanga tāhū hau.
Wā tuku: Whiringa-ā-rangi 11-2021