TiAl intermetallic compound materials containing yttebium and preparing method thereof

Abstract

A TiAl intermetallic compound materials containing rare-earth Y and its preparing method are disclosed. It consists of Ti 40-40at.%, Al 38-50at.%, Y 0.02-1at.%, alloy element 0-15at.%. It is prepared by a. adding metal mould containing rare-earth element, Ti and Al into water-cooled copper crucible vacuum inducing smelting furnace; b. preheating metal mould before smelting and vacuum pumping; c. keeping temperature after alloy melting, and mixing melt; d. pouring melt into metal mould and forming TiAl intermetallic compound casting ingot containing rare-earth Y. It achieves simple process and improvement of materials performance.

Description

Technical field: [0001] The invention relates to an intermetallic compound material and a preparation process thereof. Background technique: [0002] Due to the advantages of low density, high specific strength, and good oxidation resistance, TiAl intermetallic compounds have attracted more and more attention in the fields of aerospace, aviation, and automobiles. However, due to the poor plasticity and thermal processing ability at room temperature, this material has become a major obstacle for engineering applications. Scientists at home and abroad have done a lot of research on the structure, plasticity and deformation of TiAl intermetallic compounds. Studies have shown that microstructure refinement (including grain size and lamellar spacing refinement) is an important means to improve the mechanical properties and thermal processing ability of TiAl intermetallic compounds. However, the preparation of rare earth-containing TiAl intermetallic materials and the physical m...

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Problems solved by technology

However, the preparation of rare earth-containing TiAl intermetallic materials and the p