Medical titanium niobium alloy products preparation method, the method includes the following steps: a) according to the stoichiometric ratio of titanium niobium alloy pure titanium powder and pure niobium powder mixed, the pure titanium powder particle size is not greater than 53μm, the pure niobium powder particle size is not greater than 30μm; b) According to the three-dimensional STL data of the product, the medical titanium niobium alloy product is prepared by printing and forming by selective laser melting. The method has the following advantages: using pure metal powder instead of alloyed powder to prepare alloy, avoiding metallurgical processes such as prefabricated alloy ingot and atomized powder, thus significantly reducing raw material cost and total manufacturing cost of products. Personalized medical products can be customized, and porous bone induced scaffold prosthesis with hollow structure (or lattice structure) can be manufactured according to the bionic design, which breaks through the shortcomings of traditional preparation methods in the manufacturing of customized complex products.
1. a preparation method for medical titanium niobium alloy products is characterized in that the method includes the following steps: a) mixing pure titanium powder with pure niobium powder according to the stoichiometric ratio of titanium niobium alloy, the particle size of the pure titanium powder is not greater than 53μm, the particle size of the pure niobium powder is not greater than 30μm; The maximum particle size of the pure niobium powder is not more than 60% of the maximum particle size of the pure titanium powder; b) According to the three-dimensional STL data of the product, the medical titanium niobium alloy product is prepared by printing and forming by selective laser melting method; The process parameters of the selective laser melting are: The laser power (P) is 50~1000W, the laser scanning speed (ν) is 20~300cm/s, the powder thickness (t) is 0.001~0.01cm, the laser scanning interval (ω) is 0.004~0.03cm, and the P/(ν×t×ω) is not less than 50kJ/cm3; c) According to the design requirements of the product, at least one of the heat treatment, grinding and polishing treatment or sandblasting treatment of the medical titanium niobium alloy product in step b.
