退火温度和冷却速率对TC4钛合金组织和性能的影响  

Effect of Annealing Temperature and Cooling Rate on Microstructure and Properties of TC4 Titanium Alloy

作　　者：徐戊矫[1] 谭玉全 龚利华[1] 章磊[1] Xu Wujiao Tan Yuquan Gong Lihua Zhang Lei(Chongqing University, Chongqing 400044, Chin)

机构地区：[1]重庆大学,重庆400044

出　　处：《稀有金属材料与工程》2016年第11期2932-2936,共5页Rare Metal Materials and Engineering

基　　金：国家科技重大专项(2012ZX04010-081);国家自然科学基金青年基金项目(51205427);中央高校基本科研业务费资助(CDJZR14130005)

摘　　要：采用室温拉伸试验和冲击试验方法,对TC4钛合金分别进行940、960、980℃退火,并在980℃退火后采取不同的冷却方式得到的试样进行强度(σ_b、σ_(0.2)),塑性(δ、ψ)和冲击韧性(a_k)的测试,结合扫描电镜进行组织和形貌观察,得到了在相变点以下退火温度和冷却速率变化时,TC4钛合金的组织、强度、塑性和冲击韧性的变化规律:随着退火温度的升高,材料的强度、塑性和冲击韧性呈降低趋势;随着冷却速度的加快,材料的强度呈升高趋势,塑性和冲击韧性呈下降趋势。The strength（σb, σ0.2）, ductility（δ, ψ） and impact toughness（ak） of TC4 alloy annealed at 940, 960, 980 °C and cooled at different cooling rates after 980 °C annealing were tested by tensile tests at room temperature and impact tests at room temperature. Combined with metallography and fractography, the influence of annealing temperature and cooling rate were studied. The results show that the strength, ductility and impact toughness decrease with the increasing of annealing temperature; however, the strength increases, but the ductility and impact toughness decrease with the increasing of cooling rate.

关 键 词：TC4钛合金 强度 塑性 冲击韧性 

分 类 号：TG146.23[一般工业技术—材料科学与工程]