Saky Steel tsim 440 series hardenable martensitic stainless hlau ntawv & phaj 440A, 440B, 440C
AISI 440A, UNS S44002, JIS SUS440A, W.-nr. 1.4109 (DIN X70CrMo15) cov ntawv hlau tsis xeb, phaj, tiaj tus
AISI 440B, UNS S44003, JIS SUS440B, W.-nr. 1.4112 (DIN X90CrMoV18) cov ntawv hlau tsis xeb, phaj, tiaj tus
AISI 440C, UNS S44004, JIS SUS440C, W.-nr. 1.4125 (DIN X105CrMo17) cov ntawv hlau tsis xeb, phaj, tiaj tus
440A 440B 440C cov khoom siv tshuaj lom neeg:
| Qib | 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 |
Cov pa roj carbon thiab qhov nyuaj ntawm 440A-440B-440C tau nce ntxiv los ntawm ABC (A-0.75%, B-0.9%, C-1.2%). 440C yog cov hlau stainless zoo heev nrog qhov nyuaj ntawm 56-58 RC. Peb cov hlau no muaj kev tiv thaiv xeb zoo, 440A yog qhov zoo tshaj plaws, thiab 440C yog qhov qis tshaj plaws. 440C yog qhov tshwm sim ntau heev. Cov tshuaj lom neeg sib xyaw ntawm cov hlau stainless martensitic yog tus yam ntxwv los ntawm kev ntxiv cov ntsiab lus xws li molybdenum, tungsten, vanadium, thiab niobium raws li kev sib xyaw ntawm cov khoom sib txawv ntawm 0.1% -1.0% C thiab 12% -27% Cr. Txij li thaum cov qauv ntaub so ntswg yog lub cev-centered cubic qauv, lub zog poob qis ntawm qhov kub siab. Hauv qab 600 ° C, lub zog kub siab yog qhov siab tshaj plaws ntawm txhua hom hlau stainless, thiab lub zog nkag kuj yog qhov siab tshaj plaws. 440A muaj cov khoom zoo heev rau kev quenching thiab hardening thiab muaj zog heev. Nws muaj zog dua li 440B hlau thiab 440C hlau. 440B siv rau kev txiav cov cuab yeej, cov cuab yeej ntsuas, cov kabmob thiab cov li qub. Nws muaj zog dua li 440A hlau thiab muaj zog dua li 440C hlau. 440C muaj zog tshaj plaws ntawm txhua yam hlau tsis xeb thiab cov hlau tiv taus cua sov thiab siv rau cov nozzles thiab cov kabmob. 440F yog qib hlau uas txhim kho cov khoom yooj yim txiav ntawm 440C hlau rau cov tshuab dhos tsis siv neeg.
Lub sijhawm tshaj tawm: Lub Yim Hli-17-2018