摘要
通过对型材微观组织的观察及维氏硬度、晶间腐蚀和剥落腐蚀等的测试,研究了退火温度对5A06挤压型材组织及性能的影响。结果表明,随着退火温度的升高,晶粒发生了回复、再结晶和晶粒长大三个阶段。当退火温度达到175℃时,型材发生低温回复,硬度变化不大,耐蚀性较差;在225~325℃退火,型材发生完全再结晶,硬度变化较明显,耐蚀性得到改善;当退火温度高于325℃时,晶粒长大,硬度略降低,耐蚀性变差。结合5A06挤压型材组织及性能研究可知,确定退火温度为225~325℃。
The effects of annealing temperature on microstructures and properties of 5A06 extruded profiles were investigated by observing the microstructures of profile,testing Vickers hardness,and measuring the intergranular corrosion and flaking corrosion.The results show that with the increase of annealing temperature,the grains undergo three stages including recovery,recrystallization and grain growth.When the annealing temperature reaches 175℃,low temperature recovery in the profile with the hardness rarely changed and poor corrosion resistance.When annealing temperature is 225-325℃,complete recrystallization occurs in the profile,and the hardness changes obviously with the corrosion resistance improved.When the annealing temperature is higher than 325℃,the grain grows,and the hardness decreases slightly with the corrosion resistance decreasing.According to the microstructures and properties of the extruded profile of 5A06,the annealing temperature is determined to be 225-325℃.
作者
李秋梅
刘兆伟
周龙
李有功
段英冶
杨路
张执剑
LI Qiumei;LIU Zhaowei;ZHOU Long;LI Yougong;DUAN Yingye;YANG Lu;ZHANG Zhijian(Liaoning Zhongwang Group Co.,Ltd.,Liaoyang 111003,China)
出处
《有色金属材料与工程》
CAS
2019年第5期8-13,共6页
Nonferrous Metal Materials and Engineering
关键词
5A06挤压型材
组织
性能
退火温度
5A06 extruded profiles
microstructures
properties
annealing temperature
