Kowiri tira motuhake
0102030405
KAUPAPA KAUPAPA
mokowā | % | C | Na | Mn | P | S | I roto | Cr | Me | Nb | Ko Al |
17-4PH | MIN | - | - | - | - | - | 3.0 | 15.0 | 3.0 | 0.15 | - |
MAX | 0.07 | 1.0 | 1.0 | 0.04 | 0.03 | 5.0 | 17.5 | 5.0 | 0.45 | - | |
17-7PH | MIN | - | - | - | - | - | 6.5 | 16.0 | - | - | 0.75 |
MAX | 0.09 | 1.0 | 1.0 | 0.04 | 0.03 | 7.75 | 18.0 | - | - | 1.5 |
Āhuatanga ā-tinana
Tauira | 17-4PH | 17-7PH |
Kiato | 7.85g/cm3 | 7.85g/cm3 |
Te rewa | 1404-1440 ℃ | 1404-1440 ℃ |
HUA HUA
Ko te 17-4PH he chromium-nickel-copper precipitation whakapakeke martensitic kowiri tira. Ko tenei karaehe o te kowiri tira e tohuhia ana e te kaha nui, te pakeke me te aukati i te waikura. Ko nga ahuatanga miihini ka pai ake ma te wera Ka taea te whakatutuki i te maimoatanga me te kaha ki te 1100-1300 MPa (160-190 ksi). Kare e taea te whakamahi i tenei karaehe i runga ake i te 300°C (572°F), i nga pāmahana iti rawa ranei. He pai te parenga waikura ki te hau me te waimeha waikawa, tote ranei, a he rite te parenga waikura ki tera o te 304.
Ko te 17-7PH ko austenitic-martensitic precipitation whakapakeke kowiri tira i whakawhanakehia i runga i te kaupapa o 18-8CrNi, e mohiotia ana ano he kowiri tira te huringa wahanga whakahaere. Ko te 17-7PH he kowiri tira te whakahaere austenitic i muri i te otinga totoka Maimoatanga, me te pakari kirihou pai me te miihini, i muri i te whakamaarama, kia pai ai te rerenga o te austenite o nga carbide i muri i te huringa o te hanganga, a, na roto i te tukanga huringa martensitic, ka hurihia te nuinga o te whakahaere ki te tukanga waro iti me te kaha pai. Whai muri i te whakamaaramatanga, ka huri te titonga carbide wairere austenite, katahi ka huri te nuinga o te whakahaere ki te martensite waro iti me te uaua pai, a he pai nga taonga miihini i te pāmahana waenga. He pai ake te 17-7PH te aukati waikura i te kowiri tira martensitic whanui.
