铸造技术2026，Vol.47Issue(3)：259-271,13.DOI:10.16410/j.issn1000-8365.2026.5279
W元素添加对含Mn β凝固γ-TiAl合金高温抗氧化性影响
Effect of the W Element Addition on the High-temperature Oxidation Resistance of Mn-containing β-solidifying γ-TiAl Alloys
摘要
Abstract
β-solidifying γ-TiAl alloys contain β-phase stabilizing elements such as Mn,exhibiting low cost,excellent hot workability and wear resistance.However,the selective oxidation of Mn during high-temperature oxidation impairs the compactness of the oxide film and deteriorates the oxidation resistance.On this basis,as-cast TMN(Ti43Al1.5Mn3Nb)and TMNW(Ti43Al1.5Mn3Nb-0.4W)alloys were taken as research objects to investigate their oxidation behavior at 850℃and the effect of W addition on oxidation behavior.After cyclic oxidation,the oxidation weight gain(1.34 mg/cm2)and oxide film thickness(11.12 μm)of the TMN alloy are both higher than those of the TMNW alloy(0.98 mg/cm2,8.12 μm),with no oxide film spallation observed.After isothermal oxidation,oxide film spallation occurs in both alloys,and the oxidation weight gain(3.33 mg/cm2)and spalling mass(6.71 mg/cm2)of TMN are higher than those of TMNW(2.98 mg/cm2 and 4.05 mg/cm2,respectively).The oxide films of both alloys present a four-layer structure:TiO2-Al2O3-TiO3/Al2O3-Mn/Nb/N-enriched the layer.The transition layer between the oxide film and matrix consisted of TiN,Ti2AlN and Laves-(Ti,Nb)(Mn,Al)2 from outside to the inside.The addition of 0.4 at.％W promotes the formation of a compact oxide film,maintaining the stability of the transition layer and improving the spall resistance of the oxide film.关键词
TiAl合金/合金化/元素W/高温氧化性/过渡层Key words
TiAl alloy/alloying/W element/high-temperature oxidation resistance/transition layer分类
矿业与冶金引用本文复制引用
刘佳聪,郝俊杰,李卫臣,张智鑫,薛鹏,王建军,李小兵..W元素添加对含Mn β凝固γ-TiAl合金高温抗氧化性影响[J].铸造技术,2026,47(3):259-271,13.基金项目
广东省基础与应用基础研究基金青年提升项目(2024A1515030091) （2024A1515030091）
广东特支计划"青年拔尖人才项目"(2024TQ08C789) （2024TQ08C789）
陕西省自然科学基础研究面上项目(2025JC-YBMS-494) （2025JC-YBMS-494）
