Ti-15-3 合金时效性能研究

A STUDY OF AGING CHARACTERIZATION OF Ti 15 3 ALLOY

研究了不同炉号的Ｔｉ－１５－３（Ｔｉ－１５Ｖ－３Ｃｒ－３Ｓｎ－３Ａｌ）合金时效温度、时间以及Ａｌ当量与力学性能的关系。在５００～５４０℃范围内拉伸强度与时效温度呈线性关系，平均斜率为－３ＭＰａ／℃。得出了强度与Ａｌ当量的线性方程式，推算出最佳Ａｌ含量为３．１％～３．３％。采用统计方法研究了强度与塑性关系，并研究了冷加工对时效性能的影响。研究的达到１０８０ＭＰａ强度级别的５２０℃／１０ｈ／ＡＣ的时效制度具有满意的力学性能，并应用于制造飞机阻力伞梁。

The relationship between aging temperature,time,Al equivalent and mechanical properties of Ti 15 3 (Ti 15V 3Cr 3Sn 3Al) alloy at different heats was investigated.The variety of tensile strength with aging temperature is characterized by a linear relationship at the temperature range of 500～540℃,and the average slope is about(-3MPa/℃).The linear equation between strength and Al equivalent has been obtained,and the optimum Al content is calculated as 3.1%～3.3%.The relationship between strength and ductility was studied by statistical method,and the effect of cold processing on aging characterization was also investigated.The studied aging treatment 520℃/10h/AC reaching the strength grade 1080MPa possessies satisfactory mechanical properties,and this aging treatment was applied to manufacturing a decelerating umbrella beam of aircraft.