(1. 中南大學(xué) 材料科學(xué)與工程學(xué)院，長沙 410083；
2. 中南大學(xué) 有色金屬材料科學(xué)與工程教育部重點(diǎn)實(shí)驗(yàn)室，長沙 410083)
摘 要: 采用熔鑄、軋制的方法制備Zn-1.0Cu-0.2Ti合金，借助掃描電子顯微鏡(SEM)、透射電子顯微鏡(TEM)觀察合金的顯微組織，測(cè)定不同退火制度后合金的硬度和再結(jié)晶晶粒尺寸，建立了Zn-1.0Cu-0.2Ti合金的再結(jié)晶晶粒長大模型，研究退火溫度和退火時(shí)間對(duì)Zn-1.0Cu-0.2Ti合金再結(jié)晶行為的影響。利用硬度法測(cè)得Zn-1.0Cu-0.2Ti合金的再結(jié)晶溫度在230 ℃左右。結(jié)果表明：隨著退火溫度的升高和退火時(shí)間的延長，合金再結(jié)晶晶粒均逐漸長大，但晶粒長大的速度趨于緩慢，合金中彌散分布于基體內(nèi)的CuZn4和TiZn15相能夠抑制再結(jié)晶晶粒的長大。
關(guān)鍵字: Zn-1.0Cu-0.2Ti合金；再結(jié)晶；退火；顯微組織
（1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;
2. Key Laboratory of Non-ferrous Metal Materials Science and Engineering, Ministry of Education,
Central South University, Changsha 410083, China）
Abstract:Zn-1.0Cu-0.2Ti alloy were prepared by casting and rolling processes. The microstructures of alloy were investigated by SEM and TEM. The recrystallized grain size and Vickers hardness were measured after different annealing processes. The recrystallized grain growth model was founded. The influence of annealing temperature and annealing time on the recrystallization behavior of Zn-1.0Cu-0.2Ti alloy were studied. The recrystallization temperature of Zn-1.0Cu-0.2Ti is about 230 ℃ by measuring the hardness of alloy. The result shows that the recrystallized grain of Zn-1.0Cu-0.2Ti alloys grows with the increase of annealing temperature and time, while the growing rate decreases. The second phases CuZn4 and TiZn15 help to suppress the growth of the recrystallized grains.
Key words: Zn-1.0Cu-0.2Ti alloy; recrystallization; annealing; microstructure
