TiAl合金精密成形技术发展现状及展望

TiAl合金是一种优异的轻质耐高温结构材料,在航空、航天、汽车、兵器等热端部件制造领域具有广阔的应用和发展前景,但其较低的室温塑性、韧性和较差的冷/热加工性能,限制了其工程化的进程.为挖掘TiAl合金的应用潜力,国内外研究机构和企业从材料设计、组织性能调控到成形工艺等方面开展了卓有成效的研究.总结了近年来国内外在TiA...

Development Status and Prospect of Precision Forming Technology for TiAl Alloy

As an excellent lightweight and high temperature resistant structural material, TiAl alloy has wide application and development prospect in hot end components for aviation, aerospace, automobile, weapons, etc. However, due to its poor cold and hot workability, low room temperature plasticity and fracture toughness, there are still great obstacles in further engineering. To tap the application potential of TiAl alloy, research institutions and enterprises all over the world have carried out fruitful research from material design, microstructure and property regulation to forming process. The work summarized the research progress in precision forming of TiAl alloy in recent years, including investment casting, ingot metallurgy, powder metallurgy and additive manufacturing technology. At present, TiAl alloy investment casting blades and hot working blades have been successfully applied to aeroengines. Powder metallurgy forming and additive manufacturing technology show unique advantages in complex component forming and sheet metal forming. However, they still need to be further improved in terms of low cost and process stability.