Method for directly preparing molding titanium matrix composite through titanium hydride powder

Abstract

The invention discloses a method for directly preparing a molding titanium matrix composite through titanium hydride powder. The method comprises following steps: blank preparing, wherein the titanium hydride powder and an additive are mixed and are manufactured into a powder compact through mould pressing; dehydrogenation, wherein the powder compact is heated, the heating rate keeps ranging from 50 DEGC / min to 200 DEG C / min until the temperature of the powder compact rises to 900 DEG C to 1500 DEG C, and the powder compact keeps warm for 5 minutes to 30 minutes at the selected temperature; molding, wherein the heated powder compact is moved into an extrusion device, extrusion is carried out at the certain pressure and the certain extrusion ratio so as to enable the powder compact to pass through an extrusion die, molding and solidifying are carried out, and the titanium matrix composite is formed; and cooling, wherein after extrusion is completed, the titanium matrix composite is cooled to the room temperature at the speed of 10 DEG C / min to 100 DEG C / min, and then is taken out. Raw material cost is reduced, the technological process is shortened, and introduction of impurities in the subsequent machining process is reduced. The method has the beneficial effects of being high in dehydrogenation speed, high in product compactness, and good in mechanical property.

Description

Technical field [0001] The invention relates to a method for preparing a composite material, in particular to a method for directly preparing a shaped titanium-based composite material by using titanium hydride powder for rapid dehydrogenation and thermal consolidation, and belongs to the technical field of non-ferrous metal processing. Background technique [0002] As an important non-ferrous metal material, titanium has the characteristics of low density, high specific strength, corrosion resistance, high temperature mechanical properties, fatigue resistance and creep properties. In recent years, it has been used in military products such as aerospace vehicles, naval vessels and weapons. The application in manufacturing is increasingly widespread. In addition, titanium also has huge application potential in industries such as automotive, medical, chemical, energy, and daily consumption. Therefore, titanium is also known as "the emerging third metal" and "21st century metal." [...

AI Technical Summary

Problems solved by technology

[0010] 2. Titanium-based composite materials prepared by powder metallurgy mostly use titanium powder as the matrix raw material, but due to the high chemical activity of titanium, it is easy to react with impurity elements such as H, O, C, and N in the environment at high temperatures, so In the production process of titanium powder, the requirements for the surrounding environment are strict, and the production cost of high-purity titanium powder is very high

[0011] 3. At present, titanium hydride powder is used as raw material to prepare titanium-based composite materials, and most of them adopt pressureless sintering or sintering with low pressure. Since the release of hydrogen gas during the dehydrogenation process of titanium hydride will cause certain voids inside the material, it is therefore used The density of the product directly prepared by titanium hydride is difficult to meet the requirements of use, and further processing (such as forging, rolling, extrusion, etc.) is required to increase the density of the material and increase the process steps

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