25 um 25μm 20 um Fig.12,13,14 0.10%carbon steel cold rolled 90%to a thickness of 0.25 mm (0.010 in.)with a Rockwell hardness of 81 (on 30-T scale), then annealed at 550 C(1025 F)for 106 s,430s,865s. Recrystallized 10%,40%,80%withRockwell hardness of 79,76,70(on 30-T scale).Nital etch.1000 X 本上恢复到变形以前的水平。 器 晶格类型 在变形与再结晶过程中变否? 加热温度一◆2.3 金属的塑性加工 2、再结晶(recrystallization) (1)再结晶:当加热温度提高 到一定程度后,金属变形后被 拉长、破碎的晶粒通过重新生 核、长大变成新的均匀、细小 的等轴晶(equiaxed grains)。 (2) 再结晶后,金属的内应力 消失,力学性能与理化性能基 本上恢复到变形以前的水平。 晶格类型 在变形与再结晶过程中变否? 2.3.2 金属的再结晶(recrystallization) Fig. 12,13,14 0.10% carbon steel cold rolled 90% to a thickness of 0.25 mm (0.010 in.) with a Rockwell hardness of 81 (on 30-T scale), then annealed at 550 °C (1025 °F) for 106 s,430s,865s. Recrystallized 10%,40%, 80% withRockwell hardness of 79,76, 70(on 30-T scale). Nital etch. 1000×