(1. 江蘇大學(xué) 材料科學(xué)與工程學(xué)院，鎮(zhèn)江 212013；
2. 東北大學(xué) 材料與冶金學(xué)院，沈陽 110004；
3. 寶雞市博信金屬材料有限公司，寶雞 721013)
摘 要: 通過透射電鏡、掃描電鏡和光學(xué)顯微鏡等手段，研究絲材制備過程中BT16鈦合金的組織結(jié)構(gòu)演變。結(jié)果表明：BT16合金退火態(tài)絲材具有良好的力學(xué)性能，斷面收縮率Ψ為62%~65%，冷鐓變形量達(dá)到80%；退火后的合金組織由初生等軸α相、少量短條狀α相及晶間β相組成的；固溶時效后合金組織由不規(guī)則的等軸狀初生α相和析出針狀α′相的β相組成，其中淬火時效合金中的針狀α′相更細(xì)小。
關(guān)鍵字: BT16鈦合金；冷鐓緊固件；微觀組織；固溶；時效；力學(xué)性能
（1. School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China;
2. School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China;
3. Baoji Boxin Metal Materials Co., Ltd., Baoji 721013, China）
Abstract:The microstructure evolution of titanium alloy BT16 during the preparation wires were investigated by transmission electron microscopy, scanning electronic microscopy and optical microscopy. The results show that BT16 alloy annealed wires have excellent mechanical properties with area reduction (Ψ) of 62%−65% and cold heading deformation amount of 80%. After annealing, the alloy microstructure consists of primary equiaxial α phases, a few short-bar α′ phases and intergranular β phases. The microstructure of solid-aged alloy is composed of irregularl equiaxial primary α phases and β phases which precipitate needle α′ phases, while the needle α′ phases in the quench-aged alloy are smaller.
Key words: BT16 titanium alloy; microstructure; cold upsetting fasteners; solution; aging; mechanical properties
