摘要
在一定条件下对3 mm厚的含稀土元素的ME20M镁合金板料进行热拉深性能实验和热拉伸力学实验研究,结果表明:ME20M镁板在250℃以上热拉深成形性能才随温度的升高明显改善,其极限拉深高度受温度的影响与该材料力学拉伸性能受温度影响规律相近,说明稀土元素能显著改善镁合金的高温塑性变形性能;同时变形速度对ME20M镁合金板料塑性变形能力也有一定影响。通过对热拉深成形件传力区部位金相实验得知,合理控制热拉深实验参数,能保证成形件微观组织,进而保证成形件质量。
Through experimental studies of hot deep drawing and hot tensile on ME20M magnesium alloy sheet which is 3 mm thick with additives of rare earth element,it indicates that the hot deep drawing capability of ME20M magnesium alloy sheets becomes better with the temperature rising above 250℃ ,which is close to the law of temperature influencing on its hot tensile mechanical properties, thus showing rare earth element can improve high temperature plastic forming properties of magnesium alloy. At the same time ,the forming velocity can also influence plastic formability of magnesium alloy sheets to a certain extent. Microstructure observation of sample＇ passing force area indicates that reasonable experimental parameters can ensure microstructures of forming piece, and guarantee the quality.
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2007年第3期18-21,共4页
Ordnance Material Science and Engineering
基金
江西省教育厅2006年资助项目(赣教技字[2006]53号)
