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两种典型热处理工艺对TC18钛合金组织性能的影响
引用本文:韩栋,张鹏省,毛小南,卢亚锋,奚正平,杨建朝. 两种典型热处理工艺对TC18钛合金组织性能的影响[J]. 钛工业进展, 2009, 26(6): 19-22
作者姓名:韩栋  张鹏省  毛小南  卢亚锋  奚正平  杨建朝
作者单位:西北有色金属研究院,陕西,西安,710016
基金项目:国家科技支撑计划项目,国家973计划项目 
摘    要:采用两阶段退火和固溶强化两种典型的热处理制度,通过力学性能检测、显微组织分析和XRD物相分析,系统研究了整体热处理工艺对TC18钛合金大型锻件组织和性能的影响。结果表明:两阶段退火态的组织不仅满足强度和塑性匹配,而且断裂韧性墨。值可达75MPa·m^1/2;固溶强化热处理后的组织虽具有比前者更高的强度,但塑性损失较大,断裂韧性Kk值较低。

关 键 词:TC18钛合金  整体热处理  两阶段退火  固溶强化  显微组织  力学性能

Effect of Two Typical Heat Treatments on Microstructure and Properties of TC18 Titanium Alloy
Han Dong,Zhang Pengsheng,Mao Xiaonan,Lu Yafeng,Xi Zhengping,Yang Jianchao. Effect of Two Typical Heat Treatments on Microstructure and Properties of TC18 Titanium Alloy[J]. , 2009, 26(6): 19-22
Authors:Han Dong  Zhang Pengsheng  Mao Xiaonan  Lu Yafeng  Xi Zhengping  Yang Jianchao
Affiliation:(Northwest Institute for Nonferrous Metal Research, Xi' an 710016, China)
Abstract:The influences of variant heat treatment processes (two-stage annealing and solution strengthening) on the mechanical properties and the microstructure of TC18 titanium alloy large forgings were investigated through detections of mechanical properties as well as microstructure & XRD phase analyses. The results show that TC18 forgings have best matching of strength and plasticity after two-stage annealing process, and Ktc value could be high as 75 MPa · m1/2. Though the tensile strength of the forgings obtained is higher after solution strengthening process, both the plasticity and fracture toughness property get reduced.
Keywords:TC18 titanium alloy  whole heat-treatment  two-stage annealing  solution strengthening  microstructure  mechanical property
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