Low-elastic-modulus beta type titanium alloy for dental filling and production method thereof

Abstract

The invention provides a low-elastic-modulus beta type titanium alloy for dental filling. The low-elastic-modulus beta type titanium alloy is characterized by being prepared from alloy components according to the weight percent: 23 to 24 percent of Mo, 12 to 13 percent of Nb, 2.5 to 2.8 percent of Zr, 2.1 to 2.2 percent of Al, 1.1 to 1.7 percent of Cr, 0.5 to 0.6 percent of Ag, 0.2 to 0.3 percentof Fe, 0.4 to 0.7 percent of Ta, 0.15 to 0.2 percent of Cu, 0.3 to 0.45 percent of Hf, 0.2 to 0.4 percent of Sn, 0.05 to 0.08 percent of Er, less than or equal to 0.05 percent of O, less than or equalto 0.01 percent of H, less than or equal to 0.02 percent of C, less than or equal to 0.01 percent of N and the balance of Ti and unavoidable impurities; the beta type titanium alloy formed by heat treatment has the average crystallization grain diameter of 20 to 40mu m, the yield strength of 900 to 1000MPa, the tensile strength of 1020 to 1150MPa, the elongation percentage of 15 to 17 percent, the Young's modulus of 40 to 60GPa, the primary alpha-phase volume percent of 22 to 25 percent, the size of 2 to 3 microns and the secondary alpha-phase volume percent of 22 to 25 percent.

Description

technical field [0001] The invention belongs to the field of alloys, in particular to a biomedical β-titanium alloy material. Background technique [0002] Due to its high strength, low elastic modulus, good biocompatibility, and excellent corrosion resistance, titanium alloys have gradually replaced stainless steel and cobalt-based alloys as substitute materials for hard tissues such as bones and teeth. At present, the most widely used titanium alloy in clinical practice is α+β type Ti-6Al-4V, but after a certain period of implantation in the human body, the alloy will release Al ions with cytotoxicity and neurotoxicity due to wear and corrosion, causing osteomalacia Symptoms such as , anemia and nervous disorders, in addition V is also considered to be an element that is toxic to organisms; and the elastic modulus of the alloy is about 115GPa, which is still much higher than that of human bone (less than 40GPa). Therefore, since the 1990s, scientists from various countrie...

AI Technical Summary

Problems solved by technology

Among them, casting is the most widely used technology in clinical medicine. Although the principle of this technology is simple and easy for operators to master, its process is cumbersome, and it is difficult to make precise and precise manufacturing of materials such as teeth.

Powder metallurgy can overcome the segregation of alloying elements, but it also has the problem of precision and precise manufacturing of materials such as teeth that are difficult to composite

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