A kind of preparation method of gradient enhanced titanium matrix composite material
A titanium-based composite material and gradient technology, which is applied in the field of gradient-enhanced titanium-based composite material preparation, can solve the problems of low strength, low heat resistance and low toughness of titanium alloys, and achieves elimination of interfaces, improved heat resistance, and improved external Effects of strength and internal toughness
Active Publication Date: 2022-05-27
SHANDONG JIAOTONG UNIV
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However, the strength and heat resistance of titanium alloys are much lower than those of titanium-based composites, and the toughness of titanium-based composites is much lower than that of titanium alloys. In common application backgrounds, titanium materials that are strong on the outside and tough on the inside are extremely needed
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[0023] In order to illustrate the technical features of the solution more clearly, the solution will be described below through specific implementation modes.
[0024] A method for preparing a gradient-reinforced titanium-based composite material, comprising the following steps:
[0025] Step S1: Put titanium ball powder (50-350 mesh)+TiB 2 (≤4μm)+alcohol mixed, and low-energy ball milled in a ball mill tank with inert protective gas;
[0026] Step S2: the mixed powder after ball milling is dried in a vacuum drying oven;
[0027] Step S3: Put the titanium ball powder into the detachable mold and compact it with a hydraulic press, then take out the compacted ball powder and put it into a 45# steel ladle, and the centers overlap;
[0028] Step S4: Put the dried mixed powder into the space between the ball powder billet and the ladle cover, use the combined indenter to press the billet under the condition that the center billet is kept under pressure, and then weld the cover of...
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The invention provides a method for preparing a gradient-reinforced titanium-based composite material, which comprises the following steps: adding titanium ball powder+TiB 2 + Alcohol mixed, and low-energy ball milling in a ball mill tank with inert protective gas; the mixed powder after ball milling is dried in a vacuum drying furnace; the mixed powder is subjected to gradient composite compacting by a hydraulic press; then the ladle cover is welded to The top of the ladle cover; put the steel ingot into a high-temperature box for pre-sintering, then take it out and place it in the air to cool to room temperature; place the pre-sintered steel ingot in a high-temperature furnace to keep warm, and quickly extrude it in an extruder after taking it out to obtain titanium Extruded rods of matrix composites. The preparation method of the gradient-reinforced titanium-based composite material provided by the invention can quickly prepare the gradient-reinforced titanium-based composite material, eliminates the interface between the composite materials, and not only exerts the toughness advantages of the titanium alloy but also the titanium-based composite material. The advantages of high temperature resistance and high strength improve heat resistance and mechanical properties.
Description
technical field [0001] The invention belongs to the technical field of preparation of metal-based composite materials, and in particular relates to a method for preparing gradient-enhanced titanium-based composite materials. Background technique [0002] Due to their excellent comprehensive mechanical properties, titanium and titanium alloys have been highly valued and widely used in aviation, aerospace, shipbuilding, petroleum, chemical, weapon, electronics, biomedical and other industries. However, the strength and heat resistance of titanium alloys are far lower than those of titanium-based composites, and the toughness of titanium-based composites is much lower than that of titanium alloys. In common application backgrounds, titanium materials that are strong on the outside and tough on the inside are extremely needed. Therefore, it is necessary to continuously control the changes in the internal composition and microstructure to eliminate the interface between the two, ...
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IPC IPC(8): C22C1/05C22C14/00B22F3/10B22F3/20
CPCC22C1/05C22C14/00B22F3/20B22F3/1017
Inventor 侯甲彬李晓马强神伟孙庶业任轩王守宝
Owner SHANDONG JIAOTONG UNIV