Saky Steel Martensitic Stainless hlau yog hom chromium stainless hlau uas tswj Martensic Micrettructure ntawm chav tsev sov (kev kho cua sov (quenching thiab tempering). Feem ntau hais lus, nws yog ib hom ntawm cov hlau tsis zoo. Tom qab quenching, tempering thiab annealing txheej txheem, lub hardness ntawm 440 stainless hlau tau muaj txiaj ntsig zoo tshaj qhov ntawm lwm cov stainless thiab kub resistant steels. Nws yog feem ntau siv nyob rau hauv kev tsim cov kabmob, txiav cov cuab yeej, lossis cov pwm yas uas xav tau cov khoom siv tiv thaiv corrosive. American txheem 440 series stainless hlau nrog rau: 440A, 440B, 440C, 440F. Cov pa roj carbon cov ntsiab lus ntawm 440A, 440B thiab 440C nce kev vam meej. 440F (ASTM A582) yog hom hlau dawb nrog cov ntsiab lus ntxiv ntxiv rau ntawm 440C.
Cov qhab nia sib npaug ntawm 440 ss
| Neeg mikas | ASTM | 440A | 440B | 440C | 440F |
| Tsis yog | S44002 | S44003 | S44004 | S44020 | |
| Japanese | JIS | Sus 440A | Sus 440B | Sus 440c | Sus 440f |
| Lus German | Din | 1.4109 | 1.4122 | 1.4125 | / |
| Phiaj suav | GB | 7CR17 | 8 | Nram mog 9CR18MO | Y11CR17 |
Tshuaj lom neeg muaj pes tsawg leeg ntawm 440 ss
| Cov menyuam kawm qib | C | Si | Mn | P | S | Cr | Mo | Cu | Ni |
| 440A | 0.6-0.75 | ≤1.00 | ≤1.00 | I≤0.04 | I≤0.03 | 16.0-18.0 | I≤0.75 | (≤0,5) | (≤0,5) |
| 440B | 0.75-0.95 | ≤1.00 | ≤1.00 | I≤0.04 | I≤0.03 | 16.0-18.0 | I≤0.75 | (≤0,5) | (≤0,5) |
| 440C | 0.95-1.2 | ≤1.00 | ≤1.00 | I≤0.04 | I≤0.03 | 16.0-18.0 | I≤0.75 | (≤0,5) | (≤0,5) |
| 440F | 0.95-1.2 | ≤1.00 | ≤1.25 | I≤0.06 | ≥0.15 | 16.0-18.0 | / | (≤0.6) | (≤0,5) |
Nco tseg: Qhov tseem ceeb hauv kev sib tw tau tso cai thiab tsis tas yuav tsum ua.
Hardness ntawm 440 ss
| Cov menyuam kawm qib | Hardness, annealing (HB) | Kev Kho Cua Sov (HRC) |
| 440A | PCT255 | ≥54 |
| 440B | PCT255 | ≥56 |
| 440C | PCT269 | ≥8 |
| 440F | PCT269 | ≥8 |
Zoo ib yam li Steel hlau, Saky steel's 440 series martensite stainless hlau muaj cov yam ntxwv ntawm kev quenching los ntawm kev tiv thaiv ntau yam los ntawm kev kho cua sov. Feem ntau, 440A muaj qhov ua tau zoo heev thiab muaj kev nyuaj siab, thiab nws txoj kev nruj me ntsis siab dua li ntawm 440B thiab 440C. 440B muaj lub hardness ntau dua thiab tawv dua 440A thiab 440c rau Kev txiav cov cuab yeej, ntsuas cov cuab yeej, bearings thiab li qub. Lub 440C muaj qhov hnyav tshaj plaws ntawm txhua cov hlau uas tsis muaj hlau thiab kub tiv taus cov cuab yeej rau cov cuab yeej zoo, nozzles thiab kabmob. 440F yog cov hlau txiav dawb thiab siv tau nyob rau hauv tsis siv neeg lathes.
Lub Sijhawm Post: Jul-07-202020