1. Dab tsi yog thawj txoj kev kho cua sov ua rau txhuas alloys?
Txhuas Alloys Tshaj Tawm Plaub Phau Ntawv Qhia Txog Cov Txheej Txheem Cua Sov:
Kev daws kev kho kom sov kub (sht): Cua sov rau 480-540 degree (nyob ntawm alloy) kom yaj cov ntsiab lus. Tseem ceeb rau 2xxx \/ 6xxx \/ 7xxx series.
Quenching: Txias nrawm hauv dej (50-80 degree) kom kaw cov ntsiab lus hauv kev daws teeb meem. Qis tus nqi yuav tsum tau tshaj 200 degree \/ sec rau AERPACAC qib.
Nag lossis daus ua kom tawv):
T6: Kev laus cuav ntawm 150-200 degree
T7: Kev laus dhau-laus rau qhov seem ruaj khov
Ib tug anerting: Cov cua sov rau 345 degree ua raws li los ntawm qeeb cua txias (15 degree \/ hr) los daws kev ntxhov siab.
Tus yam ntxwv: {6061- t6 yuav tsum tau 530 degree sht + dej qu +}}} degree theem rau 8 teev.
2. Kev kho cua sov cuam tshuam cov khoom siv tshuab ua ke?
Cov khoom hloov pauv los ntawm cov txheej txheem:
| Kev kho | Lub zog tensile hloov | Hardness (HV) hloov |
|---|---|---|
| O (anealed) | -40} vs t6 | 60 → 30 |
| T4 (ntuj muaj hnub nyoog) | +25} vs o | 30 → 80 |
| T6 (Peak Aged) | +100} vs o | 30 → 115 |
Cov ntsiab cai metallurgical:
Precipitate tsim (piv txwv li, mg₂si hauv 6xxx) blocks dislocation txav. Ntau dhau-laus (T7) coarsens precipitates, txo lub zog tab sis txhim kho corrosion tsis kam.
3. Dab tsi yog qhov tseem ceeb tswj qhov kub thiab kub?
Precision Yuav Tsum:
Kev Kho Mob: ± 3 Degion Desurance rau Aerospace Alloys (piv txwv li, 7075 ntawm 477 ± 3 Degree)
Kev mob siab ceev ceev: ± 1 Qib Kev Sib Koom Tes Rau T6 Kev Kho Mob
Cua kub tus nqi: {10-20 degree \/ min kom tsis txhob muaj incipent melting nyob rau hauv high-zn alloys
Saib xyuas cov cuab yeej:
Hom k thermocouples nrog 0. 1 Degree daws teeb meem
Infrared pyrometers rau kev kub taub hau kub
4. Yuav ua li cas thiaj li xaiv cov kev kho cua sov mus rau lub voj voog sib txawv rau cov sib txawv?
Alloy-tshwj xeeb cov txheej txheem:
2xxx (al-cu): Ntau-qib kev laus (piv txwv li, 190 degree + 160 degree rau AA2024)
6xxx (al-mg-si): Ib qib ib-qib kev laus ntawm 175 degree rau 8h
7xxx (al-zn-mg): Rov ua dua tshiab rov laus (RRA) rau cov dav hlau
Muaj Cov Qauv Muaj:
Ams 2770 rau Aerospace Cua Sov Kho
ASTM B918 RAU LOJ NOJ
5. Dab tsi yog qhov tsis xws nyob hauv Aluminium tshav kub kho cua sov?
Kev Ntsuam Xyuas & Kev Tiv Thaiv Kev Tiv Thaiv:
| Tus Hom | Kev kom | Lus teb |
|---|---|---|
| Txo cov kab nrib pleb | Kev ntxhov siab ntau dhau | Siv Polymer Quenchants |
| Precipitate free aon (pfz) | Tus nqi txias txias | Ua kom zoo Qeny qeeb<10sec |
| Overburning | >5 Qib Siab Los Ntawm Solvus temp | Txhim Kho Rauv Tsiab |
Kev Tswj Xyuas Zoo:
Kev ua hardness mapping (rockwell b nplai)
Ua cov ntawv metallography los kuaj xyuas cov khoom noj nag
