Nano twin crystal oxygen-containing titanium alloy based on additive manufacturing technology and preparation method of nano twin crystal oxygen-containing titanium alloy

By adding TiO2 to the titanium alloy powder and optimizing additive manufacturing parameters, the problem of plastic loss when the strength of titanium alloy is increased in the prior art is solved, and high strength and toughness and low-cost titanium alloy preparation is achieved, and uniform mechanical properties are achieved.

CN119733848APending Publication Date: 2025-04-01XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Patent Information

Application Number
CN202510172018.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-17
Publication Date
2025-04-01

AI Technical Summary

Technical Problem

The prior art usually sacrifices its plasticity in the process of increasing the strength of titanium alloys, and it is difficult to effectively control the oxygen content in additive manufacturing to achieve high strength and low cost titanium alloys.

Method used

By adding TiO2 to the titanium alloy powder, the oxygen content in the mixed powder is adjusted to 0.1% to 0.5%, and the printing parameters of additive manufacturing technology, such as laser power, scanning speed and volume energy density, are optimized to achieve more oxygen solution and high strength and toughness.

Benefits of technology

It is realized that high strength, toughness and low cost titanium alloys are prepared without strict control of the powder oxygen content, and the material has the same mechanical properties at different construction heights and has a small ductility loss.

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Abstract

The invention relates to the technical field of titanium alloy additive manufacturing, in particular to a nano twin crystal oxygen-containing titanium alloy based on an additive manufacturing technology and a preparation method thereof.The nano twin crystal oxygen-containing titanium alloy based on the additive manufacturing technology is characterized in that titanium alloy powder and TiO2 powder are mixed to obtain mixed powder, and the mass percent of oxygen in the mixed powder is 0.1 wt.%-0.5 wt.%; the mixed powder is subjected to laser printing, and the titanium alloy based on the additive manufacturing technology is obtained; wherein the printing parameters are as follows: the laser power is 150W to 375W, the scanning speed is 430mm / s to 1500mm / s, the scanning interval is 80mu m to 120mu m, and the volume energy density is 35J / mm < 3 > to 78J / mm < 3 >. The problem that in the prior art, the strength of the titanium alloy is generally improved at the cost of sacrifice plasticity is solved, the oxygen content of powder does not need to be strictly controlled, and the alloy is high in toughness and low in cost.
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