Saky chitsulo Martensitic zitsulo zosapanga dzimbiri ndi mtundu wa chromium zitsulo zosapanga dzimbiri zomwe zimasunga martensitic microstructure pa kutentha kwa firiji, zomwe katundu wake akhoza kusinthidwa ndi kutentha kutentha (kuzimitsa ndi kutentha). Nthawi zambiri, ndi mtundu wa chitsulo chosapanga dzimbiri cholimba. Pambuyo pozimitsa, kutentha ndi kuzizira, Kuuma kwa zitsulo zosapanga dzimbiri 440 kwakhala bwino kwambiri kuposa zitsulo zina zosapanga dzimbiri komanso zosatentha. Amagwiritsidwa ntchito kwambiri popanga zonyamula, zida zodulira, kapena nkhungu zapulasitiki zomwe zimafuna katundu wambiri komanso kukana kuvala pansi pakuwonongeka. American muyezo 440 mndandanda zosapanga dzimbiri kuphatikizapo: 440A, 440B, 440C, 440F. Mpweya wa carbon wa 440A, 440B ndi 440C unawonjezeka motsatizana. 440F (ASTM A582) ndi mtundu wachitsulo chodulira chaulere chokhala ndi S zomwe zawonjezeredwa pamaziko a 440C.
Magiredi ofanana ndi 440 SS
| Amereka | Chithunzi cha ASTM | 440A | 440b | 440C | 440F |
| UNS | S44002 | S44003 | S44004 | S44020 | |
| Chijapani | JIS | Mtengo wa 440A | Mtengo wa 440B | SUS 440C | Mtengo wa 440F |
| Chijeremani | DIN | 1.4109 | 1.4122 | 1.4125 | / |
| China | GB | 7Kr17 | 8Kr17 | 11Kr17 9Cr18Mo | Y11Cr17 |
Kuphatikizika kwa Chemical kwa 440 SS
| Maphunziro | 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) |
Zindikirani: zikhalidwe zomwe zili m'mabulaketi ndizololedwa osati zokakamiza.
Kulimba kwa 440 SS
| Maphunziro | Kuuma, Annealing (HB) | Chithandizo cha kutentha (HRC) |
| 440A | ≤255 | ≥54 |
| 440b | ≤255 | ≥56 |
| 440C | ≤269 | ≥58 |
| 440F | ≤269 | ≥58 |
Zofanana ndi zitsulo zamtundu wa alloy, Saky steel's 440 series Martensite stainless steel ili ndi makhalidwe owumitsa kupyolera mu kuzimitsa, ndipo imatha kupeza mitundu yambiri yamakina pogwiritsa ntchito kutentha kosiyanasiyana. Nthawi zambiri, 440A imakhala ndi kuuma kwambiri komanso kuuma kwakukulu, ndipo kulimba kwake ndikwapamwamba kuposa 440B ndi 440C. 440B ili ndi kuuma kwakukulu ndi kulimba kuposa 440A ndi 440C kwa zida zodulira, zida zoyezera, mayendedwe ndi ma valve. 440C ili ndi kuuma kwapamwamba kwambiri kwazitsulo zonse zosapanga dzimbiri ndi zitsulo zosagwira kutentha kwa zida zapamwamba zodula, ma nozzles ndi ma bere. 440F ndi chitsulo chodula mwaulere ndipo chimagwiritsidwa ntchito makamaka popanga lathes.
Nthawi yotumiza: Jul-07-2020