(宝鸡钛业股份有限公司，宝鸡 721014)
摘 要: 通过对TC4纵向高倍组织进行分析，研究轧制加工率、热处理方法对TC4棒材纵向组织的影响。结果表明：高的热处理温度可以细化纵向晶粒，但有限度；大的加工率可以细化晶粒，得到细的纵向高倍组织的棒材，满足国外用户的要求；坯料预热处理和合理轧制工艺可以得到细的纵向高倍组织。确定了纵向细晶组织棒材的工艺路线及参数，得到了组织、退火性能满足GB/T13810—2007，固溶时效性能满足GJB2219—1994要求的棒材。
关键字: 钛合金；Ti-6Al-4V合金；显微组织；退火性能
（Baoji Titanium Industry Co., Ltd., Baoji 721014, China）
Abstract:The influence of rolling methods and heat treatment on Ti-6Al-4V alloy’s longitudinal microstructure and grain size were investigated. The results show that high temperature’s heat treatment can limitedly fine the longitudinal grain; bigger processing rate can also fine the grain. The microstructure and the annealed mechanical properties obtained can meet the standard of GB/T13810—2007 and the mechanical properties of STA condition meet the standard of GJB2219—94 and US clients’ requirements.
Key words: titanium alloy; Ti-6Al-4V alloy; microstructure; annealing property
