热处理工艺对新淬火态硬铝合金薄板组织性能的影响

 为了研究新淬火态硬铝合金蜂窝面板的残余应力与力学性能在不同热处理工艺参数下的变化规律,以退火态2A12硬铝合金薄板为对象,设计了在不同的试件取样方向、加热温度、转移时间、介质水温下的淬火正交试验,并测量试件的力学性能和长度方向上的残余应力等考核指标。通过对薄板微观组织的观察及试验中测量数据的对比分析,表明对于新淬火态2A12硬铝合金薄板,水温变化对铝合金薄板的指标影响最为显著,而微观组织中的GP区和过渡相的相互作用对薄板性能起着重要作用。此外在兼顾各指标的情况下,对正交试验中所采用的工艺因素进行了优选。

Influence of Heat Treatment Process on Microstructure and Property of As-quenched Duralum

The aim of the research is to find the changing rules of residual stresses and mechanical properties of aluminum alloy sheet under different quenching process parameters.With aluminum alloy sheet 2A12 as the study object,orthogonal experiment is designed under different parameters(orientation,heating temperature,transferring time and water temperature) and evaluation index(strength,elongation,residual stresses of lengthwise) is measured by the method of uniaxial tensile test and X-ray diffraction test in the experiment.By the observation of the microstructure of aluminum alloy sheet 2A12 and comparative analysis on the obtained data,it is found that the influence of water temperature variation to evaluation index of aluminum alloy sheet 2A12 is remarkable and interactions between GP zones and transition phases play an important role in the sheet properties.In addition,taking into account the circumstances of all aspects of evaluation index,parameters in the orthogonal experiment are optimized in the study.