Izidingo Zokwakheka Kwamakhemikhali,%,
C: ≤0.30
Mn: 0.29-1.06
P: ≤0.025
S: ≤0.025
Isimo: ≥0.10
Inani: ≤0.40
Cr: ≤0.30
Cu: ≤0.40
V: ≤0.08
Inombolo: ≤0.02
Mo: ≤0.12
*Okuqukethwe kwe-Manganese kungase kunyuswe ngo-0.05% ekuncipheni ngakunye ngo-0.01% kokuqukethwe kwekhabhoni kufika ku-1.35%.
**Okuqukethwe kwe-Niobium, ngokusekelwe esivumelwaneni, kungase kunyuswe kuze kufike ku-0.05% ukuze kuhlaziywe ukuncibilika kanye no-0.06% ekuhlaziyweni komkhiqizo oqediwe.
Izidingo zokwelashwa kokushisa:
1. Zijwayeze ngaphezu kuka-815°C.
2. Zijwayeze ngaphezu kuka-815°C, bese uthukuthela.
3. Ukushisa kwakheke phakathi kuka-845 no-945°C, kwase kupholiswa esithandweni ngaphezu kuka-845°C (kumashubhu angenamthungo kuphela).
4. Kwenziwa ngomshini bese kushiswa njengokwephuzu lesi-3 elingenhla.
5. Iqiniswe bese ishisa ngaphezu kuka-815°C.
Izidingo zokusebenza kwemishini:
Amandla okukhiqiza: ≥240Mpa
Amandla okuqina: ≥415Mpa
Ubude:
| Isampula | I-A333 GR.6 | |
| Iqondile | Phenduka | |
| Inani elincane lendingilizi evamileisifanekiso noma isikali esincane esinebanga lokumaka le-4D | 22 | 12 |
| Izibonelo eziwunxande ezinobukhulu bodonga obungu-5/16 in. (7.94 mm) nangaphezulu, nazo zonke izifanekiso ezinosayizi omncane zihlolweukuphambana okugcwele ku-2 in. (50 mm)izimpawu | 30 | 16.5 |
| Izibonelo eziwunxande zingafika ku-5/16 in. (7.94 mm) ukujiya kodonga ku-2 in. (50 mm) ibanga lokumaka (specimen ububanzi 1/2 in., 12.7 mm) | A | A |
A Vumela ukuncishiswa ngo-1.5% kubude besikhathi eside kanye nokwehliswa ngo-1.0% kobude obuguquguqukayo ngo-1/32 in. (0.79 mm) wokujiya kodonga kufika ku-5/16 in. (7.94 mm) kusukela kumanani obude abalwe ngenhla.
Ukuhlolwa Komthelela
Izinga Lokushisa Lokuhlola: -45°C
Lapho kusetshenziswa izibonelo ezincane zomthelela we-Charpy futhi ububanzi benotshi yesifanekiso bungaphansi kwama-80% wobukhulu bangempela bento, kufanele kusetshenziswe izinga lokushisa eliphansi lokuhlola umthelela njengoba kubalwe kuThebula 6 lokucaciswa kwe-ASTM A333.
| Isampula, mm | Isilinganiso esincane samasampuli amathathu | Inani elincane lokuvulae of amasampula amathathu |
| 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 |
Amapayipi ensimbi kufanele ahlolwe nge-hydrostatically noma angonakalisi (i-eddy current noma i-ultrasonic) ngesisekelo segatsha negatsha.
Ukubekezelela ububanzi obungaphandle bepayipi lensimbi:
| Ngaphandle Ububanzi, mm | ukubekezelelana okuhle, mm | ukubekezelelana okungalungile, mm |
| 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 |
Ukubekezelela ukuqina kodonga kwepayipi lensimbi:
Noma yiliphi iphuzu akufanele libe ngaphansi kuka-12.5% wobukhulu bodonga lokuzisholo.Uma ubukhulu bodonga obuncane bulawulwa, akukho phuzu elizoba ngaphansi kobukhulu obudingekayo bodonga.
Isikhathi sokuthumela: Feb-22-2024