Saky Zitsulo kupanga 440 mndandanda hardable martensitic zosapanga dzimbiri mapepala & mbale 440A, 440B, 440C
AISI 440A, UNS S44002, JIS SUS440A, W.-nr. 1.4109 ( DIN X70CrMo15 ) mapepala osapanga dzimbiri, mbale, ma flats
AISI 440B, UNS S44003, JIS SUS440B, W.-nr. 1.4112 ( DIN X90CrMoV18 ) mapepala osapanga dzimbiri, mbale, ma flats
AISI 440C, UNS S44004, JIS SUS440C, W.-nr. 1.4125 ( DIN X105CrMo17 ) mapepala osapanga dzimbiri, mbale, ma flats
440A 440B 440C gawo la mankhwala:
Gulu | C | Si | Mn | S | P | Cr | Ni | Mo |
440A | 0.60-0.75 | ≤1 | ≤1 | ≤0.030 | ≤0.040 | 16.00 ~ 18.00 | - | ≤0.75 |
440b | 0.85 ~ 0.95 | ≤1 | ≤1 | ≤0.030 | ≤0.035 | 16.00 ~ 18.00 | ≤0.60 | ≤0.75 |
440C | 0.95 - 1.20 | ≤1 | ≤1 | ≤0.030 | ≤0.040 | 16.00 ~ 18.00 | - | ≤0.75 |
Mpweya wa carbon ndi kuuma kwa 440A-440B-440C ukuwonjezeka motsatizana kuchokera ku ABC (A-0.75%, B-0.9%, C-1.2%). 440C ndi chitsulo chabwino kwambiri chosapanga dzimbiri chokhala ndi kuuma kwa 56-58 RC. Zitsulo zitatuzi zimakhala ndi dzimbiri labwino, 440A ndi yabwino kwambiri, ndipo 440C ndiyotsika kwambiri. The 440C ndiyofala kwambiri. Zomwe zimapangidwa ndi chitsulo chosapanga dzimbiri cha martensitic zimadziwika ndi kuwonjezera kwa zinthu monga molybdenum, tungsten, vanadium, ndi niobium kutengera kuphatikiza kwa magawo osiyanasiyana a 0.1% -1.0% C ndi 12% -27% Cr. Popeza mawonekedwe a minofu ndi thupi lokhazikika la cubic, mphamvu imatsika kwambiri pa kutentha kwambiri. Pansi pa 600 ° C, mphamvu ya kutentha kwambiri ndipamwamba kwambiri pakati pa mitundu yonse ya zitsulo zosapanga dzimbiri, ndipo mphamvu zokwawa ndizopamwamba kwambiri. 440A ili ndi zozimitsa zabwino kwambiri komanso zowumitsa komanso kuuma kwakukulu. Ili ndi kulimba kwambiri kuposa chitsulo cha 440B ndi chitsulo cha 440C. 440B imagwiritsidwa ntchito pazida zodulira, zida zoyezera, mayendedwe ndi ma valve. Ili ndi kuuma kwakukulu kuposa chitsulo cha 440A komanso kulimba kwambiri kuposa chitsulo cha 440C. 440C ili ndi kuuma kwambiri kwazitsulo zonse zosapanga dzimbiri ndi zitsulo zosagwira kutentha ndipo zimagwiritsidwa ntchito popanga nozzles ndi mayendedwe. 440F ndi kalasi yachitsulo yomwe imapangitsa kuti zitsulo za 440C zikhale zosavuta kuzimitsa.
Nthawi yotumiza: Aug-17-2018