Preparation method of foam titanium under hydrogen-assisted action

Abstract

The invention provides a preparation method of foam titanium under the hydrogen-assisted action. The preparation method comprises the following four steps: preparing a preformed blank test sample, hydrogenating, foaming at high temperature and removing hydrogen, and specifically comprises the following steps: filling titanium powder into a steel capsule, performing vacuum-pumping, re-filling a certain pressure of argon, carrying out hot isostatic pressure and processing a preformed blank formed by the hot isostatic pressure into a cuboid shape; then putting into a hydrogen treatment furnace and filling a certain content of hydrogen; carrying out high-temperature foaming in the vacuum environment; finally putting into the hydrogen treatment furnace to carry out vacuum annealing to obtain the foam titanium. The preparation method of the foam titanium under the hydrogen-assisted action has the benefits that the hydrogen is introduced in the process of preparing the foam titanium by adopting a gas capture method, hydrogen-induced high-temperature plasticity is utilized to improve the foaming performance of the foam titanium and improve the foaming efficiency and the porosity of the foam titanium, and finally, the hydrogen is removed to optimize the mechanical property of the foam titanium. The preparation method has the characteristics of high product porosity and low preparation cost, and the industrial production can be realized. The preparation method can be applied to the fields of aerospace and the like.

Description

technical field [0001] The invention relates to a method for preparing foamed titanium under the assistance of hydrogen, in particular to a method for preparing foamed titanium by a gas capture method under the assistance of hydrogen, and belongs to the technical field of titanium and titanium alloys. Background technique [0002] Titanium and titanium alloys have excellent properties such as low density, high specific strength, wide operating temperature range, good corrosion resistance and biocompatibility, while porous metal foam has relatively light weight, large specific surface area, excellent mechanical properties, Good damping performance and other characteristics. Porous titanium foam combines the characteristics of titanium alloy and metal foam. It can reduce the weight of the material and have a certain strength. At the same time, it also has high toughness and corrosion resistance, which makes titanium foam and its alloys have broad application prospects. [000...

AI Technical Summary

Problems solved by technology

Compared with constant temperature foaming, phase change superplasticity can make titanium and titanium alloys expand faster and obtain higher porosity, but the process is relatively complicated, the manufacturing cost is high, and it is difficult to control in industrial production, so it is not suitable for large mass production

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