CAJ | 학술논문

提出一种新的复合组织制备工艺方法,即首先通过对板坯采取滚珠滚压的方法来实现其表面塑性变形,随后对板坯进行再结晶退火细化表面微观组织.采用有限元法对Q235坯料的滚珠滚压工艺进行数值模拟,得出了表面应变的分布规律,并且对滚压后及再结晶退火后的金相组织进行了观察.结果表明:滚珠滚压工艺能够实现板坯的表面坦性变形,辅以后继的再结晶退火工艺可以获得表面细晶组织和心部粗晶组织的复合组织.
제출일충신적복합조직제비공예방법,즉수선통과대판배채취곤주곤압적방법래실현기표면소성변형,수후대판배진행재결정퇴화세화표면미관조직.채용유한원법대Q235배료적곤주곤압공예진행수치모의,득출료표면응변적분포규률,병차대곤압후급재결정퇴화후적금상조직진행료관찰.결과표명:곤주곤압공예능구실현판배적표면탄성변형,보이후계적재결정퇴화공예가이획득표면세정조직화심부조정조직적복합조직.
A new technique was presented, which was able to localize the plastic deformation on the surface of the billet and refine the surface grains after recrystallization annealing through the ball milling. FEM was employed to simulate the process on the surface of Q235 billet and obtain the strain regularity, which proved that the ball milling could real-ize the surface plastic deformation. The metallography after the ball milling and the recrystallization annealing were also observed. The results indicate that the ball milling will realize the surface plastic deformation and the compound micro-structures that are fine grains on the surface and the coarse grains in the center after the recrystallization annealing are obtained.