|
Vol.51, No.4, 291 ~ 299, 2013
|
| Title |
| Effects of Intermediate Annealing Temperature and Final Reduction Ratio on the Recrystallization Structure of a Twin-Roll Cast and Cold Rolled Al Alloy after Brazing Heat Treatment |
| 김윤성 Yun Sung Kim , 권해욱 Hae Wook Kwon , 박종우 Jong Woo Park , 김동진 Dong Jin Kim |
|
|
|
| Abstract |
| This study investigated the effects of intermediate annealing temperature and final reduction ratio on the recrystallization structure of a twin-roll continuous cast and cold rolled Al alloy after brazing heat treatment. The grain structure after brazing heat treatment of the intermediate-annealed specimen at a lower temperature of 410℃ was coarser than that at a higher temperature of 470℃. The dispersoids of nanometer size particles, which had been absent in the as-cast specimen, were precipitated during the intermediate annealing and significantly influenced the recrystallized grain structure during brazing heat treatment. Even though the grain size of the specimen rolled with a lower final reduction ratio of 30% was a little finer than that with a higher one of 40% after the intermediate annealing, the former was much coarser than the latter after the brazing heat treatment. |
|
|
| Key Words |
| alloys, annealing, recrystallization, transmission electron microscopy, cold working |
|
|
 |
|
