Tšepe ea Saky Tšepe e sa hloekang ea Martensitic ke mofuta oa tšepe e sa hloekang ea chromium e bolokang sebopeho sa martensitic mochesong oa kamore, eo thepa ea eona e ka fetoloang ka kalafo ea mocheso (ho tima le ho futhumatsa). Ka kakaretso, ke mofuta oa tšepe e sa hloekang e thatafalang. Kamora ts'ebetso ea ho tima, ho futhumatsa le ho hotetsa, Bothata ba tšepe e sa hloekang ea 440 bo ntlafalitsoe haholo ho feta ba litšepe tse ling tse sa hloekang le tse hanelang mocheso. E sebelisoa hangata tlhahisong ea li-bearing, lisebelisoa tsa ho seha, kapa li-mold tsa polasetiki tse hlokang meroalo e phahameng le ho hanyetsa ho tsofala tlas'a maemo a senyang. Tšepe e sa hloekang ea Amerika ea letoto la 440 e tloaelehileng e kenyeletsang: 440A, 440B, 440C, 440F. Bongata ba khabone ba 440A, 440B le 440C bo eketsehile ka tatellano. 440F (ASTM A582) ke mofuta oa tšepe e sa itšeheng e lokolohileng e nang le litaba tsa S tse ekelitsoeng motheong oa 440C.
Mekhahlelo e Lekanang 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 | / |
| Chaena | GB | 7Cr17 | 8Cr17 | 11Cr17 9Cr18Mo | Y11Cr17 |
Sebopeho sa Lik'hemik'hale sa 440 SS
| Mekhahlelo | 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) |
Hlokomela: boleng bo ka har'a masakaneng boa lumelloa 'me ha bo tlamehe.
Boima ba 440 SS
| Mekhahlelo | Ho thatafala, Annealing (HB) | Kalafo ea mocheso (HRC) |
| 440A | ≤255 | ≥54 |
| 440B | ≤255 | ≥56 |
| 440C | ≤269 | ≥58 |
| 440F | ≤269 | ≥58 |
Ho tšoana le tšepe e tloaelehileng ea alloy, tšepe e sa hloekang ea Saky steel ea 440 series Martensite e na le litšobotsi tsa ho thatafala ka ho tima, 'me e ka fumana mefuta e mengata ea thepa ea mechini ka kalafo e fapaneng ea mocheso. Ka kakaretso, 440A e na le ts'ebetso e ntle ea ho thatafala le ho thatafala ho hoholo, 'me ho thatafala ha eona ho phahame ho feta ha 440B le 440C. 440B e na le ho thatafala le ho thatafala ho hoholo ho feta 440A le 440C bakeng sa lisebelisoa tsa ho seha, lisebelisoa tsa ho lekanya, li-bering le li-valve. 440C e na le thata e phahameng ka ho fetisisa ho feta tšepe eohle e sa ruseng le tšepe e hanelang mocheso bakeng sa lisebelisoa tsa ho seha tsa boleng bo holimo, li-nozzle le li-bering. 440F ke tšepe e sehang mahala 'me e sebelisoa haholo-holo ho li-lathe tse iketsang.
Nako ea poso: Phupu-07-2020