Cov Kev Cai Siv Tshuaj Lom Zem,%,
C: ≤0.30
Mn: 0.29-1.06
P: ≤0.025
S: ≤0.025
Si: ≥0.10
Ni: ≤0.40
Cr: ≤0.30
Cu: ≤0.40
V: ≤0.08
Nb: ≤0.02
Mo: ≤0.12
*Cov ntsiab lus Manganese yuav raug nce ntxiv 0.05% rau txhua qhov txo qis 0.01% ntawm cov ntsiab lus carbon txog li 1.35%.
**Cov ntsiab lus Niobium, raws li kev pom zoo, yuav raug nce ntxiv txog li 0.05% rau kev tshuaj xyuas yaj thiab 0.06% rau kev tshuaj xyuas cov khoom tiav.
Cov kev cai kho cua sov:
1. Ua kom qhov kub thiab txias li qub tshaj 815°C.
2. Ua kom sov li qub tshaj 815 ° C, tom qab ntawd ua kom sov.
3. Kub tsim ntawm 845 thiab 945 ° C, tom qab ntawd txias hauv lub cub tawg saum 845 ° C (rau cov raj seamless xwb).
4. Tshuab thiab tom qab ntawd tempered raws li saum toj no Point 3.
5. Ua kom tawv thiab tom qab ntawd ua kom sov siab tshaj 815 ° C.
Cov kev cai ua haujlwm kho tshuab:
Lub zog tawm los: ≥240Mpa
Lub zog tensile: ≥415Mpa
Kev ntev:
| Qauv | A333 GR.6 | |
| Ntsug | Txoj kab hla | |
| Tus nqi tsawg kawg nkaus ntawm ib lub voj voog txheemqauv lossis ib qho qauv me me nrog qhov deb ntawm 4D | 22 | 12 |
| Cov qauv plaub fab uas muaj phab ntsa tuab ntawm 5/16 nti (7.94 hli) thiab loj dua, thiab txhua cov qauv me me uas tau sim hauvtag nrho qhov hla ntawm 2 nti (50 hli)cov cim qhia | 30 | 16.5 |
| Cov qauv plaub fab txog li 5/16 nti (7.94 hli) phab ntsa tuab ntawm 2 nti (50 hli) qhov deb cim (qhov dav ntawm cov qauv 1/2 nti, 12.7 hli) | A | A |
A Tso cai rau kev txo qis 1.5% ntawm kev ntev ntev thiab 1.0% txo qis hauv kev ntev ntawm sab nraud rau txhua 1/32 nti (0.79 hli) ntawm phab ntsa tuab txog li 5/16 nti (7.94 hli) los ntawm cov nqi ntev uas teev saum toj no.
Kev Ntsuas Kev Cuam Tshuam
Kub Ntsuas: -45 ° C
Thaum siv cov qauv me me Charpy impact thiab qhov dav ntawm cov qauv notch tsawg dua 80% ntawm qhov tuab tiag tiag ntawm cov khoom siv, qhov kub thiab txias qis dua yuav tsum tau siv raws li tau suav hauv Rooj 6 ntawm ASTM A333 specification.
| Qauv, hli | Qhov nruab nrab tsawg kawg nkaus ntawm peb cov qauv | Tus nqi tsawg kawg nkaus ntawme of peb cov qauv |
| 10 × 10 | 18 | 14 |
| 10 × 7.5 | 14 | 11 |
| 10 × 6.67 | 12 | 9 |
| 10 × 5 | 9 | 7 |
| 10 × 3.33 | 7 | 4 |
| 10 × 2.5 | 5 | 4 |
Cov kav hlau yuav tsum tau kuaj hydrostatically lossis tsis-destructively (eddy tam sim no lossis ultrasonic) ntawm ib ceg-rau-ceg.
Kev kam rau siab ntawm sab nraud ntawm cov yeeb nkab hlau:
| Sab Nraud Txoj Kab uas hla, hli | kev kam rau siab zoo, hli | kev kam rau siab tsis zoo, hli |
| 10.3-48.3 | 0.4 | 0.4 |
| 48.3＜D≤114.3 | 0.8 | 0.8 |
| 114.3＜D≤219.10 | 1.6 | 0.8 |
| 219.1＜D≤457.2 | 2.4 | 0.8 |
| 457.2＜D≤660 | 3.2 | 0.8 |
| 660＜D≤864 | 4.0 | 0.8 |
| 864＜D≤1219 | 4.8 | 0.8 |
Kev kam rau siab ntawm phab ntsa tuab ntawm cov yeeb nkab hlau:
Txhua qhov chaw yuav tsum tsis pub tsawg dua 12.5% ntawm qhov tuab ntawm phab ntsa. Yog tias qhov tuab ntawm phab ntsa tsawg kawg nkaus raug txiav txim, tsis muaj qhov chaw yuav tsum tsawg dua qhov tuab ntawm phab ntsa uas xav tau.
Lub sijhawm tshaj tawm: Lub Ob Hlis-22-2024