A kind of titanium alloy easy to refine grain and preparation method thereof
A technology for refining grains and titanium alloys, which is applied to low stacking fault energy, large-size ultra-fine-grained titanium alloys or nano-crystalline titanium alloys and their preparation, titanium alloys and their preparation, TiNb-based ultra-fine grained and nano-crystalline titanium alloys In the field of its preparation, it can solve the problems of insufficient grain size, insufficient material size, and no compactness, and achieve the effect of reducing the difficulty of process control and manufacturing cost, broad application prospects, and improving production efficiency.
Active Publication Date: 2017-05-17
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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[0007] (2) The prepared bulk nanomaterials have voids and are not dense, which seriously affects the excellent performance of nanomaterials
But it also has certain limitations, mainly in the poor uniformity of the prepared material structure, the crystal grains are still not fine enough (compared to the nanocrystalline structure), and the material size is not large enough in terms of industrial practicability. The maximum three-dimensional size of bulk nanocrystalline pure titanium is only 25mm×25mm×120mm
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[0067] The preferred solutions of the present invention are described below in conjunction with the accompanying drawings and specific embodiments, but it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the claims of the present invention.
[0068] Refer to Table 1 for the nominal composition of the Ti-Nb-O alloys of Examples 1 to 16.
[0069] The alloy is prepared according to the composition (weight percentage, wt%) shown in Table 1, the raw materials are selected, and after batching, the electrode is pressed into an electrode, and the alloy ingot is obtained by smelting in a vacuum consumable electric arc furnace for many times. The ingot is homogenized at 900°C to 1100°C for 20h to 30h to prepare an ingot with uniform chemical composition. Blank forging at 900°C-950°C, and multi-fire forging at 800°C-950°C to refine the structure, and finally forge into a δ40mm slab, w...
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Abstract
The invention discloses a titanium alloy and a preparing method thereof, the titanium alloy comprises chemical components in percent by weight: 33wt%-40wt% of Nb, 0.3wt%-0.5wt% of O and the balance of Ti; or the alloy comprises the components in percentage by weight: 33wt%-40wt% of Nb, 0.3wt%-0.5wt% of O, one or more of following element groups: 0-3wt% of V, 0-1wt% of Mo, 0-3wt% of Al, 0-3wt% of Sn and 0-4wt% of Zr and the balance of Ti. Components of the alloy in the invention are optimally designed, low-stacking fault energy large-sized ultra-fine grain / nanocrystalline titanium alloy can be obtained by smelting, thermal processing and cold processing, the titanium alloy has excellent match of strength and plasticity, the preparing method breaks through limitation of preparing of a titanium alloy nano-material in the prior art, processing control difficulty and manufacturing cost are reduced, the production efficiency is improved and the titanium alloy and preparing method have a broad application prospect.
Description
technical field [0001] The present invention relates to a titanium alloy and a preparation method thereof, in particular to a TiNb-based ultrafine-grained and nanocrystalline titanium alloy and a preparation method thereof, in particular to a low-stacking-fault-energy, large-size ultrafine-crystalline titanium alloy or nanocrystalline titanium The alloy and its preparation method belong to the technical field of new materials. Background technique [0002] Due to the small size effect, surface interface effect, and macroscopic quantum tunneling effect of ultra-fine grain (grain size between 0.1 μm and 1 μm) and nanocrystalline (grain size less than 100 nm) materials, they make It exhibits a series of mechanical, optical, electrical, acoustic, magnetic and other properties that are essentially different from ordinary polycrystalline and amorphous solids. For example, high-energy nanomaterials, nano-stealth materials, and nano-magnetic materials have important uses in electro...
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IPC IPC(8): C22C14/00C22F1/18
Inventor 王玉会张旺峰颜孟奇李野
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS