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A preparation method for realizing high strength and toughness of tc4 titanium alloy by co-strengthening method

A high-strength and toughness, titanium alloy technology, used in metal processing equipment, transportation and packaging, etc., can solve problems such as deterioration of alloy plasticity, toughness, and inability to meet, and achieve the effect of improving tensile properties, improving load transmission capacity, and improving plasticity.

Active Publication Date: 2022-03-01
西安稀有金属材料研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Further improving the strength of high-strength titanium alloy will seriously deteriorate the plasticity, toughness and other properties of the alloy.
Among the existing high-strength and tough titanium alloys, both the strength > 1200MPa and the fracture toughness > 65MPa m 1 / 2 At present, there is no clear report on titanium alloys at home and abroad, and none of the existing alloys can meet the requirements of this index.

Method used

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  • A preparation method for realizing high strength and toughness of tc4 titanium alloy by co-strengthening method
  • A preparation method for realizing high strength and toughness of tc4 titanium alloy by co-strengthening method
  • A preparation method for realizing high strength and toughness of tc4 titanium alloy by co-strengthening method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This embodiment includes the following steps:

[0037] Step 1. Preparation of boron-coated TC4 titanium alloy powder: put 4g of boron powder and 1000g of TC4 titanium alloy spherical powder into a planetary ball mill, and ball mill at a speed of 200r / min and a ball-to-material ratio of 6:1 Treat for 1 hour to obtain boron-coated TC4 titanium alloy powder; the particle size of the boron powder is 5 μm, and the particle size of the TC4 titanium alloy spherical powder is 48 μm;

[0038] Step 2. Preparation of graphene material-coated boron-coated TC4 titanium alloy powder: put 5g of graphene oxide into 800mL ethanol and ultrasonically disperse uniformly for 3h to obtain a graphene oxide solution, and then the boron-coated TC4 obtained in step 1 Titanium alloy powder is added to the graphene oxide solution, and the temperature is 60°C, the speed is 400r / min, and the water bath is mechanically stirred at a constant temperature to a semi-dry state to obtain a mixed slurry, wh...

Embodiment 2

[0047] This embodiment includes the following steps:

[0048] Step 1. Preparation of boron-coated TC4 titanium alloy powder: Put 0.4g of boron powder and 199g of TC4 titanium alloy spherical powder into a planetary ball mill at a speed of 400r / min and a ball-to-material ratio of 3:1. Ball milling for 2 hours to obtain boron-coated TC4 titanium alloy powder; the particle size of the boron powder is 5 μm, and the particle size of the TC4 titanium alloy spherical powder is 48 μm;

[0049] Step 2, preparation of graphene material-coated boron-coated TC4 titanium alloy powder: put 0.6g graphene nanosheet into 400mL ethanol and ultrasonically disperse uniformly for 2h to obtain graphene nanosheet solution, and then the boron obtained in step 1 The coated TC4 titanium alloy powder was added to the graphene nanosheet solution and mechanically stirred at a constant temperature in a water bath to a semi-dry state at a temperature of 40°C and a rotational speed of 350r / min to obtain a mi...

Embodiment 3

[0063] This embodiment includes the following steps:

[0064] Step 1. Preparation of boron-coated TC4 titanium alloy powder: Put 0.44g of boron powder and 199g of TC4 titanium alloy spherical powder into a planetary ball mill at a speed of 400r / min and a ball-to-material ratio of 1:1. Ball milling for 2 hours to obtain boron-coated TC4 titanium alloy powder; the particle size of the boron powder is 1 μm, and the particle size of the TC4 titanium alloy spherical powder is 15 μm;

[0065] Step 2, preparation of graphene material-coated boron-coated TC4 titanium alloy powder: put 0.6g graphene microchips into 400mL ethanol and ultrasonically disperse them uniformly for 2h to obtain a graphene microchip solution, and then the boron obtained in step 1 The coated TC4 titanium alloy powder was added to the graphene microchip solution and mechanically stirred in a water bath at a constant temperature to a semi-dry state at a temperature of 40°C and a rotation speed of 350r / min to obta...

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Abstract

The invention discloses a preparation method for achieving high strength and toughness of TC4 titanium alloy by a co-strengthening method. The method comprises: 1. ball milling boron powder and TC4 titanium alloy spherical powder to obtain boron-coated TC4 titanium alloy spherical powder; After adding the coated TC4 titanium alloy spherical powder into the graphene material solution and stirring evenly, the graphene material-coated boron-coated TC4 titanium alloy powder is obtained; 3. The graphene material-coated boron-coated TC4 titanium alloy powder is sequentially subjected to plasma Graphene-boron co-strengthened TC4 titanium alloy composites were obtained by sintering and rolling. In the present invention, boron and graphene materials are sequentially coated on TC4 titanium alloy spherical powder, and TiB whiskers distributed in a discontinuous hook network structure are self-generated in situ after sintering, combined with in-situ self-generated nano-TiC particles and residual graphene materials in the dispersion The strengthening and fixing effect realize the co-strengthening effect of TiB, graphene and TiC, which makes the composite material have good strong-plastic matching.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a preparation method for realizing high strength and toughness of TC4 titanium alloy through a co-strengthening method. Background technique [0002] Titanium and titanium alloys have the characteristics of low density, high specific strength, excellent high temperature performance, corrosion resistance and biocompatibility, and are widely used in aerospace, automotive and biomedical fields. With the development of the aviation industry, higher performance requirements are put forward for titanium alloys. Titanium-based composites have the comprehensive properties of titanium alloys and reinforcements. Compared with traditional titanium alloys, titanium-based composites have the advantages of high specific strength, heat resistance, and good corrosion resistance. At the same time, titanium-based composite materials are also divided into many ty...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/16B22F1/065B22F3/105B22F3/18C22C47/14C22C49/11C22C49/14C22C101/22
CPCB22F3/105B22F3/1039B22F3/18C22C47/14C22C49/11C22C49/14B22F2003/1051B22F2003/185B22F2998/10B22F1/16
Inventor 董龙龙张雷霍望图刘跃李亮张伟卢金文张于胜周廉
Owner 西安稀有金属材料研究院有限公司
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