The invention relates to Ti37 ~ 52Ni^5. Al-6Nb-3Hf high temperature alloy material, by adding elements aluminium, niobium, hafnium in the titanium nickel alloy to improve the room temperature yield strength, high temperature mechanical properties and durability of a new type of high temperature alloy material. At present, nickel base, iron base and cobalt base superalloys are usually used as metal structure materials above 60(TC) in power, petrochemical, transportation, especially aviation and aerospace industries. These materials have high density (generally more than 8.0g/ CMS), and the weight of components and equipment made is large. In order to reduce structural weight, improve efficiency and reduce energy consumption, it is necessary to develop new superalloys with low density and high strength to meet the future development needs of relevant industrial fields. Binary TiNi alloy is a kind of intermetallic compound with excellent mechanical properties, good corrosion resistance and biocompatibility. As a functional material of shape memory alloy, it has been widely used in medicine, industry and life. The alloy has a density of about 6.3g/cn^, about 20% lower than nickel -, iron - and cobalt-based superalloys.
Based on TiNi alloy, the room temperature and high temperature strength of TiNi alloy can be significantly improved by adding A1 element, which has the potential of application in aerospace field. The addition of Nb element can improve the mechanical properties and oxidation resistance of the alloy at room temperature and high temperature. The addition of a certain amount of Hf on the basis of TiNiAlNb alloy can not only further improve the room temperature and high temperature strength of the alloy, but also significantly improve the durability of the alloy. A new type of low density and high strength high temperature alloy can be developed to replace the traditional high temperature alloy, which can reduce the structure weight, improve the efficiency and reduce the energy consumption. The purpose of the invention is to propose a low density, high specific strength TiNiAlNbHf superalloy material, the TiNiAlNbHf superalloy used as a structural material at high temperature, can replace the traditional high density nickel base, iron base and cobalt base superalloy material, can reduce the structure weight, improve efficiency, reduce energy consumption.
