Insimbi ye-Saky Insimbi engagqwali ye-Martensitic uhlobo lwensimbi engagqwali ye-chromium egcina isakhiwo esincane se-martensitic ekushiseni kwegumbi, izakhiwo zaso ezingalungiswa ngokwelashwa kokushisa (ukucima nokushisa). Ngokuvamile, uhlobo lwensimbi engagqwali eqinile. Ngemva kwenqubo yokucima, ukufudumala nokushisa, ubulukhuni bensimbi engagqwali ye-440 buthuthuke kakhulu kunobezinye izinsimbi ezingagqwali nezimelana nokushisa. Ivame ukusetshenziswa ekwakhiweni kwama-bearing, amathuluzi okusika, noma isikhunta sepulasitiki esidinga imithwalo ephezulu kanye nokumelana nokuguguleka ngaphansi kwezimo ezigqwali. Insimbi engagqwali ye-American standard 440 series ehlanganisa: 440A, 440B, 440C, 440F. Okuqukethwe kwekhabhoni kwe-440A, 440B kanye ne-440C kwanda ngokulandelana. I-440F (ASTM A582) uhlobo lwensimbi yokusika yamahhala enokuqukethwe kwe-S okungeziwe ngesisekelo se-440C.
Amabanga Alinganayo Ka-440 SS
| UmMelika | I-ASTM | 440A | 440B | 440C | 440F |
| I-UNS | S44002 | I-S44003 | S44004 | S44020 | |
| IsiJapane | I-JIS | I-SUS 440A | I-SUS 440B | I-SUS 440C | I-SUS 440F |
| IsiJalimane | I-DIN | 1.4109 | 1.4122 | 1.4125 | / |
| IShayina | GB | 7Cr17 | 8Cr17 | 11Cr17 9Cr18Mo | Y11Cr17 |
Ukwakheka Kwamakhemikhali Kwama-SS angu-440
| Amabanga | 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) |
Qaphela: amanani akubakaki avunyelwe futhi awaphoqelekile.
Ubulukhuni be-440 SS
| Amabanga | Ubulukhuni, i-Annealing (HB) | Ukwelashwa ngokushisa (HRC) |
| 440A | ≤255 | ≥54 |
| 440B | ≤255 | ≥56 |
| 440C | ≤269 | ≥58 |
| 440F | ≤269 | ≥58 |
Njengensimbi ejwayelekile ye-alloy, insimbi engagqwali ye-Saky steel engu-440 series Martensite inezici zokuqina ngokucima, futhi ingathola izinhlobo eziningi zezakhiwo zemishini ngokwelashwa kokushisa okuhlukile. Ngokuvamile, i-440A inokusebenza okuhle kakhulu kokuqina kanye nokuqina okuphezulu, futhi ukuqina kwayo kuphakeme kunokwe-440B kanye ne-440C. I-440B inokuqina okuphezulu kanye nokuqina kune-440A kanye ne-440C ye- amathuluzi okusika, amathuluzi okulinganisa, amabheringi namavalvu. I-440C inobulukhuni obukhulu kunayo yonke insimbi engagqwali kanye nensimbi engashisi ukushisa yamathuluzi okusika asezingeni eliphezulu, ama-nozzle namabheringi. I-440F iyinsimbi yokusika ekhululekile futhi isetshenziswa kakhulu kuma-lathe azenzakalelayo.
Isikhathi sokuthunyelwe: Julayi-07-2020