Titanium alloy composite material, preparation method thereof and laser additive manufacturing forming method

A composite material and laser additive technology, applied in the direction of additive processing, etc., can solve the problems of low hardness, poor wear resistance, unable to meet the requirements of metal matrix composite materials, etc., to improve the density, solve the processing difficulty, and eliminate the effect of cracks.

Inactive Publication Date: 2019-05-10
SHANGHAI RES INST OF MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a titanium alloy composite material, which can solve the poor wear resistance and low hardness of the titanium alloy in the prior art, which cannot meet the needs of various advanced manufacturing industries for metal matrix composite materials

Method used

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  • Titanium alloy composite material, preparation method thereof and laser additive manufacturing forming method
  • Titanium alloy composite material, preparation method thereof and laser additive manufacturing forming method
  • Titanium alloy composite material, preparation method thereof and laser additive manufacturing forming method

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The titanium alloy composite material of this embodiment is specifically prepared according to the following steps:

[0030] (1) Weighing Ti6Al4V powder, titanium carbide, titanium boride and titanium silicide which are respectively 99.5%, 0.2%, 0.2%, and 0.1% by weight, wherein the purity of Ti6Al4V powder is greater than 99.9wt%, and the average particle diameter is 15 μm, The purity of titanium carbide, titanium boride and titanium silicide is greater than 99.9wt%, and the average particle size is 40nm;

[0031] (2) Place the raw materials of step (1) in a planetary high-energy ball mill for ball milling. During the ball milling process, argon is used as the protective gas, and zirconia ceramic balls with a diameter of 2 mm are added as the ball milling medium. The zirconia ceramic balls The mass ratio of the ball mill to the raw material is 5:1. The ball mill is rotated in a combination of up and down and left and right rotation. The speed of the up and down turning...

Embodiment 2

[0035] The difference between the steps of preparing the titanium alloy composite material in this example and Example 1 is:

[0036] The weight percentages of Ti6Al4V, titanium carbide, titanium boride and titanium silicide are 80%, 5%, 10% and 5% respectively, the particle size of Ti6Al4V powder is 53μm, and the particle size of titanium carbide, titanium boride and titanium silicide is 200nm ;

[0037] The diameter of zirconia ceramic balls is 15mm, the mass ratio of zirconia ceramic balls to raw materials is 20:1, the rotation speed of the ball mill is 80rpm up and down, the rotation speed of left and right is 300rpm, and the total time of ball milling is 50h.

[0038] After ball milling, the particle size of the powder ranges from 15 to 53 μm, of which D50 is 30.35 μm. The particle size distribution of the titanium alloy composite material after ball milling is as follows: image 3 As shown, its SEM morphology is shown in Figure 4 shown.

[0039] The difference betwee...

Embodiment 3

[0042] The difference between the steps of preparing the titanium alloy composite material in this example and Example 1 is:

[0043] The weight percentages of Ti6Al4V, titanium carbide, titanium boride, and titanium silicide are 90%, 5%, 3%, and 2% respectively, the particle size of Ti6Al4V powder is 38μm, and the particle size of titanium carbide, titanium boride, and titanium silicide is 100nm ;

[0044] The diameter of zirconia ceramic balls is 10mm, the mass ratio of zirconia ceramic balls to raw materials is 8:1, the rotation speed of the ball mill is 40rpm up and down, the rotation speed of left and right is 300rpm, and the total time of ball milling is 35h.

[0045] After ball milling, the particle size of the powder ranges from 15 to 53 μm, of which D50 is 30.35 μm. The particle size distribution of the titanium alloy composite material after ball milling is as follows: Figure 5 As shown, its SEM morphology is shown in Figure 6 shown.

[0046] The difference betw...

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Abstract

The technical proposal discloses a titanium alloy composite material. The titanium alloy composite material is prepared from titanium alloy powder and reinforcing phase powder, wherein the reinforcingphase powder is prepared from titanium carbide, titanium boride and titanium silicide, and the weight fraction of reinforcing phase powder accounts for the titanium alloy composite material is 0.5%-20%. According to the technical scheme, a ball milling method is adopted to insert titanium carbide, titanium boride and boron carbide powder into the titanium alloy powder to form a composite powder material of titanium alloy and titanium carbide, titanium boride and boron carbide, so that the hardness and strength of the titanium alloy material is greatly improved. And meanwhile, the prepared composite powder is subjected to laser additive manufacturing forming, by regulating laser manufacturing parameters, metallurgical defects such as cracks and pores of the titanium alloy composite material during laser manufacturing are reduced or eliminated, and the comprehensive mechanical properties such as density, hardness and strength of parts are significantly improved, and the problem of difficult to manufacture the titanium alloy material is solved.

Description

technical field [0001] The invention relates to the field of laser additive manufacturing, in particular to a titanium alloy composite material, a preparation method thereof, and a laser additive manufacturing forming method. Background technique [0002] Due to the advantages of fatigue resistance, wear resistance, high thermal conductivity, low thermal expansion, and radiation shielding, metal matrix composites have become a major national demand for aerospace, electronic packaging, equipment, nuclear power, automobiles, and rail transit, as well as national economic equipment manufacturing. The key material, its dosage is also one of the signs of the level of material technology. [0003] At present, the preparation methods of metal matrix composites are still mainly powder metallurgy, die casting, stirring casting and other methods, but these methods generally have the problems of complex process equipment and high cost, and the forming of complex parts is severely limit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C32/00B22F9/04B33Y10/00
Inventor 何贝贝朱德祥吴文恒杨启云张亮卢林龙倩蕾倪晓晴宋佳
Owner SHANGHAI RES INST OF MATERIALS CO LTD
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