Preparation method of gradient reinforced titanium-based composite material
A titanium-based composite material and gradient technology, which is applied in the field of gradient-reinforced titanium-based composite material preparation, can solve the problems of low toughness, low strength and heat resistance of titanium alloys, and achieve improved heat resistance, elimination of interfaces, and improved external Effect of Strength and Internal Toughness
Active Publication Date: 2021-11-16
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 preparation method of a gradient enhanced titanium-based composite material, which comprises the following steps: mixing titanium ball powder, TiB2 and alcohol, and carrying out low-energy ball milling in a ball milling tank with inert protective gas; drying the ball-milled mixed powder in a vacuum drying furnace; carrying out gradient composite compaction on the mixed powder by using a hydraulic machine; welding a steel ladle sleeve cover to the top end of a steel ladle sleeve; pre-sintering a steel ingot in a high-temperature box, taking out the steel ingot, and cooling the steel ingot in air to room temperature; and placing the pre-sintered steel ingot in a high-temperature furnace for heat preservation, taking out the steel ingot, and rapidly extruding the steel ingot in an extruder to obtain an extruded bar of the titanium-based composite material. According to the preparation method of the gradient-enhanced titanium-based composite material provided by the invention, the gradient-enhanced titanium-based composite material can be rapidly prepared, an interface between the two composite materials is eliminated, the toughness advantage of titanium alloy is exerted, the high temperature resistance and high strength advantages of the titanium-based composite material are also exerted, and the heat resistance and the mechanical performance are improved.
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