Qhov sib txawv ntawm 420 420J1 thiab 420J2 stainless hlau ua tau zoo yam ntxwv:
Qhov txawv tseem ceeb ntawm cov hlau tsis xeb 420J1 thiab 420J2
420J1 muaj qee qib ntawm kev hnav tsis kam thiab kev xeb tsis kam, siab hardness, thiab nws tus nqi qis dua li cov pob stainless hlau. Nws yog qhov tsim nyog rau qhov chaw ua haujlwm uas xav tau cov hlau stainless hlau ib txwm muaj.
420J2 stainless hlau siv yog ib hom hlau tsis xeb tsim raws li American ASTM cov qauv; Nyiv tus qauv SUS420J2, tus qauv tshiab hauv tebchaws 30Cr13, tus qauv qub hauv tebchaws 3Cr13, tus lej digital S42030, European tus qauv 1.4028.
420J1 stainless hlau: Tom qab quenching, qhov nyuaj yog siab, thiab qhov corrosion tsis kam yog zoo (sib nqus). Tom qab quenching, 420J2 stainless hlau nyuaj dua 420J1 hlau (sib nqus).
Feem ntau, qhov kub quenching ntawm 420J1 yog 980 ~ 1050 ℃. Qhov nyuaj ntawm 980 ℃ cua sov roj quenching qis dua 1050 ℃ cua sov roj quenching. Qhov nyuaj tom qab 980 ℃ roj quenching yog HRC45-50, thiab qhov nyuaj tom qab 1050 ℃ roj quenching yog 2HRC siab dua. Txawm li cas los xij, cov qauv microstructure tau tom qab quenching ntawm 1050 ℃ yog ntxhib thiab brittle. Nws raug pom zoo kom siv 1000 ℃ cua sov thiab quenching kom tau txais cov qauv zoo dua thiab qhov nyuaj.
Cov Hlau Stainless 420 / 420J1 / 420J2 Cov Ntawv & Cov Phaj Sib Npaug Qib:
| TUS QAUV | JIS | WERKSTOFF NR. | BS | AFNOR | SIS | UNS | AISI |
| SS 420 | SUS 420 | 1.4021 | 420S29 | - | 2303 | S42000 | 420 |
| SS 420J1 | SUS 420J1 | 1.4021 | 420S29 | Z20C13 | 2303 | S42010 | 420L |
| SS 420J2 | SUS 420J2 | 1.4028 | 420S37 | Z20C13 | 2304 | S42010 | 420M |
SS420 / 420J1/ 420J2 Cov Ntawv, Cov Phaj Cov Tshuaj Lom Zem (saky hlau):
| Qib | C | Mn | Si | P | S | Cr | Ni | Mo |
| SUS 420 | 0.15 siab tshaj | 1.0 siab tshaj plaws | 1.0 siab tshaj plaws | 0.040 siab tshaj plaws | 0.030 siab tshaj plaws | 12.0-14.0 | - | - |
| SUS 420J1 | 0.16-0.25 | 1.0 siab tshaj plaws | 1.0 siab tshaj plaws | 0.040 siab tshaj plaws | 0.030 siab tshaj plaws | 12.0-14.0 | - | - |
| SUS 420J2 | 0.26-0.40 | 1.0 siab tshaj plaws | 1.0 siab tshaj plaws | 0.040 siab tshaj plaws | 0.030 siab tshaj plaws | 12.0-14.0 | - | - |
SS 420 420J1 420J2 Cov Ntawv, Cov Phaj Cov Khoom Siv Kho Tshuab (saky steel):
| Qib | Lub Zog Tensile Max | Lub Zog Tawm (0.2% Offset) Max | Kev ntev (hauv 2 nti.) |
| 420 | MPa – 650 | MPa - 450 | 10% |
| 420J1 | MPa - 640 | MPa - 440 | 20% |
| 420J2 | MPa - 740 | MPa - 540 | 12% |
Qhov nyuaj ntawm 420 series hlau tom qab kev kho cua sov yog kwv yees li HRC52 ~ 55, thiab kev ua tau zoo ntawm ntau yam xws li kev tiv thaiv kev puas tsuaj tsis zoo heev. Vim tias nws yooj yim dua rau kev txiav thiab txhuam, nws yog qhov tsim nyog rau kev tsim cov riam. 420 stainless hlau kuj tseem hu ua "txiav qib" martensitic hlau. 420 series hlau muaj kev tiv thaiv xeb zoo heev vim nws cov ntsiab lus carbon tsawg (cov ntsiab lus carbon: 0.16 ~ 0.25), yog li nws yog cov hlau zoo tagnrho rau kev tsim cov cuab yeej dhia dej.
Lub sijhawm tshaj tawm: Lub Xya Hli-07-2020