中南大学学报（自然科学版）2011，Vol.42Issue(11)：3289-3295,7.
Al-8.0Zn-2.0Mg-l.6Cu铝合金的淬透性
Hardenability of Al-8.0Zn-2.0Mg-1.6Cu aluminum alloy
摘要
Abstract
The hardenability and structures on Al-8.0Zn-2.0Mg-l.6Cu aluminum alloy were determined by end-quench test, differential scanning calorimetry (DSC), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), optical microscopy (OM) and hardness. The result shows that with the decrease of cooling rate the hardness decreases significantly, and the quenched depth is about 40 mm with critical cooling velocity 3.8 °C/s. The precipitation of MgZn2 (tf) phases precipitating in 438-215 V. Interval is the primary factor that affects the hardenability of this alloy during the quenching. The equilibrium state MgZn2 phases precipitate as two paths successively during the quenching: grain boundaries and inside the grains, with the peak temperature 387 °C and 342 "C respectively.关键词
Al-Zn-Mg-Cu/末端淬火/淬透性:平衡态MgZn2相Key words
Al-Zn-Mg-Cu/ end-quench test/ hardenability/ equilibrium MgZn2 phase分类
矿业与冶金引用本文复制引用
万里,邓运来,张云崖,张新明..Al-8.0Zn-2.0Mg-l.6Cu铝合金的淬透性[J].中南大学学报（自然科学版）,2011,42(11):3289-3295,7.基金项目
国家重点基础研究发展计划("973"计划)项目(2010CB731700) （"973"计划）
