摘要
为探究电场对材料组织和性能的影响,对冷拔TU1无氧铜分别进行电场处理及真空处理,并对两种方式处理后的试样进行显微组织观察和力学性能测试。结果表明:电场处理后,冷拔铜棒硬度下降,其耐腐蚀性增强且塑性提高;在电场作用下,材料晶粒长大且有退火孪晶形成,位错密度降低,其晶粒及退火孪晶的尺寸分布与传统真空处理相比更为均匀;电场作用时若施加大电流,可促进大角度晶界和退火孪晶界形成,并促进形核、再结晶及细化晶粒,材料的力学性能及耐腐蚀性更为优异。
In order to investigate the influence of electric field on the microstructure and properties of the material, the cold-drawn TU1 oxyen-free copper bar was subjected to electric field treatment and vacuum heat treatment respectively. The microstructure of the samples treated by the two approaches were observed and the mechanical properties were tested. The results show that after electric field treatment, the hardness of the cold-drawn TU1 oxyen-free copper bar decreases, and its corrosion resistance enhances and the plasticity improves. Under the electric field, the grain of the material grows and the annealing twins appear and the density of dislocations reduces, the size distribution of crystal grains and annealing twins are more uniform compared with that of the conventional vacuum heat treatment. When the large current is applied during the electric field, it can promote the formation of high-angle grain boundaries and annealing twin boundaries, and can also promote the recrystallization, nucleation and grain refinement, and the mechanical properties and corrosion resistance of the material is excellent.
作者
汤若梅
杨刚
杨屹
吴明霞
TANG Ruomei;YANG Gang;YANG Yi;WU Mingxia(School of Manufacturing Science and Engineering,Sichuan University,Chengdu 610065,China)
出处
《热加工工艺》
北大核心
2020年第10期25-29,32,共6页
Hot Working Technology
基金
国家自然科学基金资助项目(51675357)。
关键词
TU1无氧铜
电场处理
退火孪晶
再结晶
TU1 oxyen-free copper
electric field treatment
annealing twin
recrystallization
