Saky steel Martensitic tšepe e sa hloekang ke mofuta oa tšepe e sa hloekang ea chromium e bolokang microstructure ea martensitic mocheso oa kamore, eo thepa ea eona e ka fetoloang ka ho phekola mocheso (ho tima le ho futhumatsa). Ka kakaretso, ke mofuta oa tšepe e sa hloekang e thata. Ka mor'a ho tima, ho futhumatsa le ho kenya litšepe, Ho thatafala ha tšepe e sa hloekang ea 440 ho ntlafetse haholo ho feta litšepe tse ling tse sa hloekang le tse thibelang mocheso. E atisa ho sebelisoa ha ho etsoa lithulusi tsa ho beha, ho itšeha, kapa liforomo tsa polasetiki tse hlokang meroalo e phahameng le ho hanyetsa tlas'a maemo a senyang. Maemo a Amerika a 440 letoto la litšepe tse sa hloekang ho kenyelletsa: 440A, 440B, 440C, 440F. Khabone ea 440A, 440B le 440C e ile ea eketseha ka ho latellana. 440F (ASTM A582) ke mofuta oa tšepe ea ho itšeha mahala e nang le litaba tsa S tse kentsoeng motheong oa 440C.
Mephato e Tšoanang le ea 440 SS
| Moamerika | ASTM | 440A | 440B | 440C | 440F |
| UNS | S44002 | S44003 | S44004 | S44020 | |
| Sejapane | JIS | SUS 440A | SUS 440B | SUS 440C | SUS 440F |
| Sejeremane | DIN | 1.4109 | 1.4122 | 1.4125 | / |
| China | GB | 7Kr17 | 8Kr17 | 11Kr17 9Cr18Mo | Y11Cr17 |
Moetso oa Lik'hemik'hale oa 440 SS
| Mephato | C | Si | Mn | P | S | Cr | Mo | Cu | Ni |
| 440A | 0.6-0,75 | ≤1.00 | ≤1.00 | ≤0.04 | ≤0.03 | 16.0-18.0 | ≤0.75 | (≤0.5) | (≤0.5) |
| 440B | 0.75-0,95 | ≤1.00 | ≤1.00 | ≤0.04 | ≤0.03 | 16.0-18.0 | ≤0.75 | (≤0.5) | (≤0.5) |
| 440C | 0.95-1.2 | ≤1.00 | ≤1.00 | ≤0.04 | ≤0.03 | 16.0-18.0 | ≤0.75 | (≤0.5) | (≤0.5) |
| 440F | 0.95-1.2 | ≤1.00 | ≤1.25 | ≤0.06 | ≥0.15 | 16.0-18.0 | / | (≤0.6) | (≤0.5) |
Tlhokomeliso: litekanyetso tse ka har'a li-brackets lia lumelloa ebile ha lia tlameha.
Boima ba 440 SS
| Mephato | Thata, Annealing (HB) | Kalafo ea mocheso (HRC) |
| 440A | ≤255 | ≥54 |
| 440B | ≤255 | ≥56 |
| 440C | ≤269 | ≥58 |
| 440F | ≤269 | ≥58 |
Joalo ka tšepe e tloaelehileng ea alloy, Saky steel's 440 letoto la tšepe ea Martensite e na le litšobotsi tsa ho thatafala ka ho tima, 'me e ka fumana mefuta e mengata ea mochini ka kalafo e fapaneng ea mocheso. Ka kakaretso, 440A e na le ts'ebetso e ntle ea ho thatafatsa le boima bo phahameng, 'me boima ba eona bo phahame ho feta ba 440B le 440C. 440B e na le boima bo phahameng le ho tiea ho feta 440A le 440C bakeng sa lisebelisoa tsa ho seha, lisebelisoa tsa ho lekanya, li-bearings le li-valve. 440C e na le boima bo phahameng ka ho fetisisa ba tšepe e sa hloekang le tšepe e thibelang mocheso bakeng sa lisebelisoa tsa boleng bo phahameng ba ho itšeha, li-nozzles le libere. 440F ke tšepe e sehang mahala, 'me e sebelisoa haholo ho lilathe tsa othomathike.
Nako ea poso: Jul-07-2020