摘要
目的研究Ti Al合金铸造过程的收缩特性。方法采用Ti4822合金,通过设计长方体、圆柱体、回字形和环形4种典型结构,开展了熔模精密铸造工艺实验。结果基础尺寸在10~80 mm时,Ti4822合金的自由线收缩率在3.11%~2.09%之间,受阻收缩比自由收缩低30%~50%左右,同时随着基础尺寸的增加,自由线收缩量增加,而收缩率呈降低趋势。结论收缩数据和规律的获得,为Ti Al合金铸件尺寸精度控制提供了基础数据。
In order to investigate the contraction characteristics of TiAl alloy,four kinds of typical structure were designed to carry out an experiment on investment casting process of Ti4822 alloy. The result showed that the free linear contraction rate of Ti4822 alloy was 3.11% to 2.09% when the basic dimension was 10～80 mm. Furthermore, the hindered linear contraction rate was 30%～50% lower than the free linear contraction rate. Besides, the contraction quantity increased with the improvement of basic dimension, while the contraction rate declined. The acquiring of contraction characteristics and rules provides basic data for controlling the dimension accuracy of TiAl alloy casting.
作者
魏战雷
任贵娟
李建崇
黄东
莫晓飞
罗倩
南海
WEI Zhan-lei;REN Gui-juan;LI Jian-chong;HUANG Dong;MO Xiao-fei;LUO Qian;NAN Hai(AECC Beijing Institute of Aeronautical Materials, Beijing 100095, China;Beijing Engineering Research Center of Advanced Titanium Alloy Precision Forming Technology, Beijing 100095, China;Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China)
出处
《精密成形工程》
2018年第3期18-21,共4页
Journal of Netshape Forming Engineering
基金
装备预研基金(6140922020107)
国家自然科学基金(51671026)
关键词
TIAL合金
熔模铸造
收缩率
TiAl alloy
investment casting
contraction rate
